Apnea - A Medical Dictionary, Bibliography, and Annotated Research Guide to Internet References

PNEA A M EDICAL D ICTIONARY , B IBLIOGRAPHY , AND A NNOTATED R ESEARCH G UIDE TO I NTERNET R EFERENCES

J AMES N. P ARKER , M.D. AND P HILIP M. P ARKER , P H .D., E DITORS

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ICON Health Publications ICON Group International, Inc. 4370 La Jolla Village Drive, 4th Floor San Diego, CA 92122 USA Copyright ©2003 by ICON Group International, Inc. Copyright ©2003 by ICON Group International, Inc. All rights reserved. This book is protected by copyright. No part of it may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without written permission from the publisher. Printed in the United States of America. Last digit indicates print number: 10 9 8 7 6 4 5 3 2 1

Publisher, Health Care: Philip Parker, Ph.D. Editor(s): James Parker, M.D., Philip Parker, Ph.D. Publisher's note: The ideas, procedures, and suggestions contained in this book are not intended for the diagnosis or treatment of a health problem. As new medical or scientific information becomes available from academic and clinical research, recommended treatments and drug therapies may undergo changes. The authors, editors, and publisher have attempted to make the information in this book up to date and accurate in accord with accepted standards at the time of publication. The authors, editors, and publisher are not responsible for errors or omissions or for consequences from application of the book, and make no warranty, expressed or implied, in regard to the contents of this book. Any practice described in this book should be applied by the reader in accordance with professional standards of care used in regard to the unique circumstances that may apply in each situation. The reader is advised to always check product information (package inserts) for changes and new information regarding dosage and contraindications before prescribing any drug or pharmacological product. Caution is especially urged when using new or infrequently ordered drugs, herbal remedies, vitamins and supplements, alternative therapies, complementary therapies and medicines, and integrative medical treatments. Cataloging-in-Publication Data Parker, James N., 1961Parker, Philip M., 1960Apnea: A Medical Dictionary, Bibliography, and Annotated Research Guide to Internet References / James N. Parker and Philip M. Parker, editors p. cm. Includes bibliographical references, glossary, and index. ISBN: 0-597-83740-6 1. Apnea-Popular works. I. Title.

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Disclaimer This publication is not intended to be used for the diagnosis or treatment of a health problem. It is sold with the understanding that the publisher, editors, and authors are not engaging in the rendering of medical, psychological, financial, legal, or other professional services. References to any entity, product, service, or source of information that may be contained in this publication should not be considered an endorsement, either direct or implied, by the publisher, editors, or authors. ICON Group International, Inc., the editors, and the authors are not responsible for the content of any Web pages or publications referenced in this publication.

Copyright Notice If a physician wishes to copy limited passages from this book for patient use, this right is automatically granted without written permission from ICON Group International, Inc. (ICON Group). However, all of ICON Group publications have copyrights. With exception to the above, copying our publications in whole or in part, for whatever reason, is a violation of copyright laws and can lead to penalties and fines. Should you want to copy tables, graphs, or other materials, please contact us to request permission (E-mail: [email protected]). ICON Group often grants permission for very limited reproduction of our publications for internal use, press releases, and academic research. Such reproduction requires confirmed permission from ICON Group International Inc. The disclaimer above must accompany all reproductions, in whole or in part, of this book.

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Acknowledgements The collective knowledge generated from academic and applied research summarized in various references has been critical in the creation of this book which is best viewed as a comprehensive compilation and collection of information prepared by various official agencies which produce publications on apnea. Books in this series draw from various agencies and institutions associated with the United States Department of Health and Human Services, and in particular, the Office of the Secretary of Health and Human Services (OS), the Administration for Children and Families (ACF), the Administration on Aging (AOA), the Agency for Healthcare Research and Quality (AHRQ), the Agency for Toxic Substances and Disease Registry (ATSDR), the Centers for Disease Control and Prevention (CDC), the Food and Drug Administration (FDA), the Healthcare Financing Administration (HCFA), the Health Resources and Services Administration (HRSA), the Indian Health Service (IHS), the institutions of the National Institutes of Health (NIH), the Program Support Center (PSC), and the Substance Abuse and Mental Health Services Administration (SAMHSA). In addition to these sources, information gathered from the National Library of Medicine, the United States Patent Office, the European Union, and their related organizations has been invaluable in the creation of this book. Some of the work represented was financially supported by the Research and Development Committee at INSEAD. This support is gratefully acknowledged. Finally, special thanks are owed to Tiffany Freeman for her excellent editorial support.

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About the Editors James N. Parker, M.D. Dr. James N. Parker received his Bachelor of Science degree in Psychobiology from the University of California, Riverside and his M.D. from the University of California, San Diego. In addition to authoring numerous research publications, he has lectured at various academic institutions. Dr. Parker is the medical editor for health books by ICON Health Publications. Philip M. Parker, Ph.D. Philip M. Parker is the Eli Lilly Chair Professor of Innovation, Business and Society at INSEAD (Fontainebleau, France and Singapore). Dr. Parker has also been Professor at the University of California, San Diego and has taught courses at Harvard University, the Hong Kong University of Science and Technology, the Massachusetts Institute of Technology, Stanford University, and UCLA. Dr. Parker is the associate editor for ICON Health Publications.

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About ICON Health Publications To discover more about ICON Health Publications, simply check with your preferred online booksellers, including Barnes & Noble.com and Amazon.com which currently carry all of our titles. Or, feel free to contact us directly for bulk purchases or institutional discounts: ICON Group International, Inc. 4370 La Jolla Village Drive, Fourth Floor San Diego, CA 92122 USA Fax: 858-546-4341 Web site: www.icongrouponline.com/health

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Table of Contents FORWARD .......................................................................................................................................... 1 CHAPTER 1. STUDIES ON APNEA ....................................................................................................... 3 Overview........................................................................................................................................ 3 The Combined Health Information Database................................................................................. 3 Federally Funded Research on Apnea .......................................................................................... 12 E-Journals: PubMed Central ....................................................................................................... 69 The National Library of Medicine: PubMed ................................................................................ 69 CHAPTER 2. NUTRITION AND APNEA ........................................................................................... 113 Overview.................................................................................................................................... 113 Finding Nutrition Studies on Apnea......................................................................................... 113 Federal Resources on Nutrition ................................................................................................. 118 Additional Web Resources ......................................................................................................... 118 CHAPTER 3. ALTERNATIVE MEDICINE AND APNEA..................................................................... 121 Overview.................................................................................................................................... 121 National Center for Complementary and Alternative Medicine................................................ 121 Additional Web Resources ......................................................................................................... 126 General References ..................................................................................................................... 127 CHAPTER 4. DISSERTATIONS ON APNEA....................................................................................... 129 Overview.................................................................................................................................... 129 Dissertations on Apnea.............................................................................................................. 129 Keeping Current ........................................................................................................................ 130 CHAPTER 5. CLINICAL TRIALS AND APNEA ................................................................................. 131 Overview.................................................................................................................................... 131 Recent Trials on Apnea.............................................................................................................. 131 Keeping Current on Clinical Trials ........................................................................................... 133 CHAPTER 6. PATENTS ON APNEA ................................................................................................. 135 Overview.................................................................................................................................... 135 Patents on Apnea ....................................................................................................................... 135 Patent Applications on Apnea ................................................................................................... 161 Keeping Current ........................................................................................................................ 195 CHAPTER 7. BOOKS ON APNEA ..................................................................................................... 197 Overview.................................................................................................................................... 197 Book Summaries: Federal Agencies............................................................................................ 197 Book Summaries: Online Booksellers......................................................................................... 199 The National Library of Medicine Book Index ........................................................................... 201 Chapters on Apnea..................................................................................................................... 202 CHAPTER 8. MULTIMEDIA ON APNEA .......................................................................................... 207 Overview.................................................................................................................................... 207 Bibliography: Multimedia on Apnea.......................................................................................... 207 CHAPTER 9. PERIODICALS AND NEWS ON APNEA ....................................................................... 209 Overview.................................................................................................................................... 209 News Services and Press Releases.............................................................................................. 209 Newsletters on Apnea ................................................................................................................ 214 Academic Periodicals covering Apnea ....................................................................................... 214 CHAPTER 10. RESEARCHING MEDICATIONS ................................................................................. 217 Overview.................................................................................................................................... 217 U.S. Pharmacopeia..................................................................................................................... 217 Commercial Databases ............................................................................................................... 218 Researching Orphan Drugs ....................................................................................................... 219 APPENDIX A. PHYSICIAN RESOURCES .......................................................................................... 223 Overview.................................................................................................................................... 223

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NIH Guidelines.......................................................................................................................... 223 NIH Databases........................................................................................................................... 225 Other Commercial Databases..................................................................................................... 228 The Genome Project and Apnea ................................................................................................. 228 APPENDIX B. PATIENT RESOURCES ............................................................................................... 233 Overview.................................................................................................................................... 233 Patient Guideline Sources.......................................................................................................... 233 Associations and Apnea ............................................................................................................. 239 Finding Associations.................................................................................................................. 240 APPENDIX C. FINDING MEDICAL LIBRARIES ................................................................................ 243 Overview.................................................................................................................................... 243 Preparation................................................................................................................................. 243 Finding a Local Medical Library................................................................................................ 243 Medical Libraries in the U.S. and Canada ................................................................................. 243 ONLINE GLOSSARIES................................................................................................................ 249 Online Dictionary Directories ................................................................................................... 249 APNEA DICTIONARY ................................................................................................................. 251 INDEX .............................................................................................................................................. 333

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FORWARD In March 2001, the National Institutes of Health issued the following warning: "The number of Web sites offering health-related resources grows every day. Many sites provide valuable information, while others may have information that is unreliable or misleading."1 Furthermore, because of the rapid increase in Internet-based information, many hours can be wasted searching, selecting, and printing. Since only the smallest fraction of information dealing with apnea is indexed in search engines, such as www.google.com or others, a nonsystematic approach to Internet research can be not only time consuming, but also incomplete. This book was created for medical professionals, students, and members of the general public who want to know as much as possible about apnea, using the most advanced research tools available and spending the least amount of time doing so. In addition to offering a structured and comprehensive bibliography, the pages that follow will tell you where and how to find reliable information covering virtually all topics related to apnea, from the essentials to the most advanced areas of research. Public, academic, government, and peer-reviewed research studies are emphasized. Various abstracts are reproduced to give you some of the latest official information available to date on apnea. Abundant guidance is given on how to obtain free-of-charge primary research results via the Internet. While this book focuses on the field of medicine, when some sources provide access to non-medical information relating to apnea, these are noted in the text. E-book and electronic versions of this book are fully interactive with each of the Internet sites mentioned (clicking on a hyperlink automatically opens your browser to the site indicated). If you are using the hard copy version of this book, you can access a cited Web site by typing the provided Web address directly into your Internet browser. You may find it useful to refer to synonyms or related terms when accessing these Internet databases. NOTE: At the time of publication, the Web addresses were functional. However, some links may fail due to URL address changes, which is a common occurrence on the Internet. For readers unfamiliar with the Internet, detailed instructions are offered on how to access electronic resources. For readers unfamiliar with medical terminology, a comprehensive glossary is provided. For readers without access to Internet resources, a directory of medical libraries, that have or can locate references cited here, is given. We hope these resources will prove useful to the widest possible audience seeking information on apnea. The Editors

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the NIH, National Cancer Institute (NCI): http://www.cancer.gov/cancerinfo/ten-things-to-know.

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CHAPTER 1. STUDIES ON APNEA Overview In this chapter, we will show you how to locate peer-reviewed references and studies on apnea.

The Combined Health Information Database The Combined Health Information Database summarizes studies across numerous federal agencies. To limit your investigation to research studies and apnea, you will need to use the advanced search options. First, go to http://chid.nih.gov/index.html. From there, select the “Detailed Search” option (or go directly to that page with the following hyperlink: http://chid.nih.gov/detail/detail.html). The trick in extracting studies is found in the drop boxes at the bottom of the search page where “You may refine your search by.” Select the dates and language you prefer, and the format option “Journal Article.” At the top of the search form, select the number of records you would like to see (we recommend 100) and check the box to display “whole records.” We recommend that you type “apnea” (or synonyms) into the “For these words:” box. Consider using the option “anywhere in record” to make your search as broad as possible. If you want to limit the search to only a particular field, such as the title of the journal, then select this option in the “Search in these fields” drop box. The following is what you can expect from this type of search: •

Maxillomandibular Advancement Surgery for Obstructive Sleep Apnea Syndrome Source: JADA. Journal of the American Dental Association. 133(11): 1489-1497. November 2002. Contact: Available from American Dental Association. ADA Publishing Co, Inc., 211 East Chicago Avenue, Chicago, IL 60611. (312) 440-2867. Website: www.ada.org. Summary: Although maxillomandibular advancement (MMA) surgery is highly successful, the indications for and staging of MMA in the treatment of obstructive sleep apnea syndrome (OSAS) have not been settled upon. In this article, the author presents a retrospective review of several published case series with inclusion criteria of 20 or more patients who underwent MMA and received documented preoperative and postoperative diagnostic polysomnography. Protocols of MMA as a primary versus

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secondary operation, with and without adjunctive procedures in a site-specific approach, are compared and discussed. As an extrapharyngeal operation that enlarges and stabilizes the entire velo-orohypopharyngeal airway, MMA, which can be safely combined with adjunctive nonpharyngeal procedures, may circumvent the staging dilemmas associated with multiple, less successful, segmental, invasive, pharyngeal procedures. In accordance with current goals and guidelines governing OSAS surgery, MMA does not need to be limited to severe OSAS cases as a last resort after other procedures have failed but, rather, is also indicated as an initial operation for veloorohypopharyngeal narrowing. The author concludes that the diagnosis and management of OSAS requires a multidisciplinary team approach, including a working relationship between the dentist and sleep physician. General dentists and dental specialists who participate in the management of snoring and OSAS cases should have some knowledge of basic sleep medicine. 5 figures. 1 table. 55 references. •

Heart in Uremia: Role of Hypertension, Hypotension, and Sleep Apnea Source: American Journal of Kidney Diseases. 38(4 Supplement 1): S38-S46. October 2001. Contact: Available from W.B. Saunders Company. Periodicals Department, 6277 Sea Harbor Drive, Orlando, FL 32887-4800. (800) 654-2452 or (407) 345-4000. Summary: Cardiovascular disease is the leading cause of morbidity (illness) and mortality (death) in patients with end stage renal (kidney) disease (ESRD). The causes of this morbidity and mortality include those usually found in the general population, those related to the uremic status, and those related to dialysis treatment. This article focuses on the specific roles of hypertension (high blood pressure), hypotension (low blood pressure), anemia (low levels of hemoglobin, the oxygen carrying parts of the blood), hypoalbuminemia (low levels of protein in the blood), malnutrition, dyslipidemia (unhealthy levels of fats in the blood), reactive C protein, calciumphosphate product, dialysis modalities (hemodialysis versus peritoneal dialysis), and hyperhomocysteinemia. The authors put special emphasis on hyperparathyroidism as a traditional toxin. The emergent role of sleep apnea has been confirmed in animal models as well as in humans studied using polysomnography. There are difficulties in diagnosing coronary disease, because angiography has some risks, is expensive, and should be reserved for patients having symptoms of heart failure, patients with diabetes mellitus, or patients entering a transplantation list. This allows patients with coronary disease to undergo revascularization (adding blood vessels) through coronary artery bypass (preferably) or percutaneous transluminal angioplasty. Patients for whom surgery is not appropriate should be treated using more traditional medical procedures. 2 figures. 1 table. 36 references.

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Treating Obstructive Sleep Apnea and Snoring: Assessment of an Anterior Mandibular Positioning Device Source: JADA. Journal of the American Dental Association. 131(6): 765-771. June 2000. Contact: Available from American Dental Association. ADA Publishing Co, Inc., 211 East Chicago Avenue, Chicago, IL 60611. Summary: Dental devices have been used to help manage snoring and obstructive sleep apnea, or OSA. This article reports on patients' compliance with and complications of long term use of an anterior mandibular positioning, or AMP, device. The device used was a custom made, two piece, full coverage, adjustable acrylic appliance, used nightly. The appliance advanced the mandible by 75 percent of the patient's maximum

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protrusive distance. The study sample included 65 consecutive patients with mild to moderate obstructive sleep apnea and snoring. Long term use (three years or more) of the AMP device in these patients was 51 percent (27 of 53 patients). Of the 53 responding patients, 40 percent reported jaw or facial muscle pain, 40 percent had occlusal changes, 38 percent reported tooth pain, 30 percent reported jaw joint pain, and 30 percent experienced xerostomia. Of the 27 long term AMP users, 22 rated themselves as being very satisfied and four as somewhat satisfied; one person was neither satisfied nor dissatisfied with the appliance. The authors conclude that with use of the AMP device, 40 percent of patients will develop some minor complications of jaw, mouth, or tooth pain, and approximately 26 percent of long term users might experience a painless but irreversible change in their occlusion. Annual follow up office visits with the dentist appear necessary for early detection of these changes. 4 figures. 23 references. •

Sleep Apnea in End-Stage Renal Disease Source: Seminars in Dialysis. 4(1): 52-58. January-March 1991. Summary: Information regarding the prevalence and diagnosis of sleep disorders in patients with renal disease is limited, but interest in such abnormalities has increased over the last several years. This article reviews the literature on sleep apnea in end-stage renal disease (ESRD). Topics include diagnosis, the prevalence of sleep apnea in ESRD, etiological considerations, and treatment interventions. The author stresses that effective diagnosis and treatment of sleep apnea are required by physicians if we are to continue to make headway in improving the quality of life for ESRD patients. 1 figure. 2 tables. 58 references.

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Obstructive Sleep Apnea: Its Relevance in the Care of Diabetic Patients Source: Clinical Diabetes. 20(3): 126-132. Summer 2002. Contact: Available from American Diabetes Association. 1701 North Beauregard Street, Alexandria, VA 22311. (800) 232-3472. Website: www.diabetes.org. Summary: Obstructive sleep apnea (OSA) is a common and frequently unrecognized disorders. OSA is often found in patients with obesity, diabetes, and cardiovascular disease, and there is growing evidence that sleep apnea is independently associated with increased cardiovascular morbidity (related disease or complications). This article reviews the presentation, diagnosis, and treatment of OSA and its related health risks. The authors discuss the proposed associations between OSA and diabetes and insulin resistance. The authors conclude that diabetes and OSA are common disorders that often coexist in the setting of shared risk factors and perhaps a similar metabolic environment. Currently, emphasis is being placed on identifying and treating modifiable cardiovascular risk factors, such as tobacco abuse, obesity, hyperglycemia, hypertension, and dyslipidemia. The authors stress that there is growing evidence that OSA should be added to this list. 2 tables. 68 references.

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Longitudinal Effect on Facial Growth After Tonsillectomy in Children with Obstructive Sleep Apnea Source: World Journal of Orthodontics. 3(1): 67-72. Spring 2002. Contact: Available from Quintessence Publishing Co., Inc. 551 Kimberly Drive, Carol Stream, Illinois 60188. (800) 621-0387. Website: www.quintpub.com. Summary: Obstructive sleep apnea syndrome (OSAS) is characterized by heavy snoring, significant increases in respiratory rate and inspiratory effort, and arousals and apnoic

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(cessation of breathing) episodes during sleep. This article reports on a study undertaken to study the longitudinal effect on the dentition and facial morphology of children with OSAS and enlarged tonsils who have undergone tonsillectomy (removal of the tonsils) to relieve the pharyngeal obstruction. The mean age of the 14 children in the experimental group was 5.7 years; there were matched controls without pharyngeal obstruction problems. Preoperative, 1 year postoperative, and 3 year postoperative analyses of several dentitional (teeth), facial, and breathing variables were done. The results showed significant differences for several dentitional and facial variables, despite the small number of children and the short observation time. The largest changes occurred during the first postoperative year, indicating that the obstruction of the airway had significantly impacted facial morphology and the dentition in young children. The authors conclude that normalization after relief of the obstruction occurred mostly during the first postoperative year. 12 figures. 20 references. •

Nocturnal Polyuria in Type 2 Diabetes: A Symptom of Obstructive Sleep Apnea Source: Diabetes Educator. 28(3): 424-434. May-June 2002. Contact: Available from American Association of Diabetes Educators. 100 West Monroe Street, 4th Floor, Chicago, IL 60603-1901. (312) 424-2426. Summary: Polyuria (excessive urination) and nocturia (getting up at night to urinate) in individuals with type 2 diabetes may be due to obstructive sleep apnea (OSA), a recently recognized etiology (cause) of excess nighttime urine production. This article reports on an exploratory study that examined the relationships among glucose control, OSA, and nocturnal urine production. A sample of community-dwelling older adults (20 nondiabetic subjects and 10 poorly controlled type 2 diabetes subjects) was recruited based on self-report of nocturia more than twice per night. Participants were monitored on a metabolic research unit for 24 hours to track intake and output, collect blood and urine samples, and conduct an overnight polysomnography sleep study. None of the subjects had fasting serum glucose levels above the renal threshold. OSA was found in 65 percent of subjects. Those with moderate or severe OSA had significantly greater overnight urine production than subjects without OSA. Subjects with type 2 diabetes and moderate or severe OSA had the highest nocturnal urine production. The authors conclude that the high incidence of undetected OSA in subjects with type 2 diabetes with nocturia suggests that nocturia, OSA, and type 2 diabetes frequently coexist and may be interrelated. The article concludes with a list of resources, including Internet, books, pamphlets, and professional contacts, for readers who want to obtain more information. 2 figures. 3 tables. 42 references.

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Improvement of Sleep Apnea in Patients with Chronic Renal Failure Who Undergo Nocturnal Hemodialysis Source: New England Journal of Medicine. 344(2): 102-107. January 11, 2001. Summary: Sleep apnea (defined as the absence of airflow for longer than 10 seconds; it usually interrupts sleep) is common in patients with chronic renal failure (CRF) and is not improved by either conventional hemodialysis of peritoneal dialysis. With nocturnal hemodialysis, patients undergo hemodialysis seven nights per week at home, while sleeping. This article reports on a study undertaken to investigate the role of nocturnal hemodialysis in correcting sleep apnea in patients with CRF. Fourteen patients who were undergoing conventional hemodialysis for four hours on each of three days per week underwent overnight polysomnography (a measurement of sleep). The patients were then switched to nocturnal hemodialysis for eight hours during each of six or

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seven nights a week. They underwent polysomnography again 6 to 15 months later on one night when they were undergoing nocturnal hemodialysis and on another night when they were not. The mean serum creatinine concentration (a measurement of kidney or replacement kidney function) was significantly lower during the period when the patients were undergoing nocturnal hemodialysis than during the period when they were undergoing conventional hemodialysis. The conversion from conventional hemodialysis to nocturnal hemodialysis was associated with a reduction in the frequency of apnea and hypopnea from 25 (plus or minus 25) to 8 (plus or minus 8) episodes per hour of sleep. This reduction occurred predominantly in seven patients with sleep apnea, in whom the frequency of episodes fell from 46 (plus or minus 19) to 9 (plus or minus 9) episodes per hour, accompanied by increases in the minimal oxygen saturation, transcutaneous partial pressure of carbon dioxide, and serum bicarbonate concentration. During the period when these seven patients were undergoing nocturnal hemodialysis, the apnea hypopnea index measured on nights when they were not undergoing nocturnal hemodialysis was greater than that on nights when they were undergoing nocturnal hemodialysis, but it still remained lower than it had been during the period when they were undergoing conventional hemodialysis. The authors conclude that nocturnal hemodialysis corrects sleep apnea associated with chronic renal failure. 2 figures. 4 tables. 22 references. •

Obstructive Sleep Apnea: A Case Report Source: Journal of the Tennessee Dental Association. 82(3): 48-51. Fall 2002. Contact: Available from Journal of the Tennessee Dental Association. 2104 Sunset Place, Nashville, TN 37212. E-mail: [email protected]. Summary: Sleep-disordered breathing is a spectrum of relatively common medical problems ranging from apnea to hypopnea to upper airway resistance syndrome. Apnea is the temporary cessation of airflow during sleep for 10 seconds or more, despite continued ventilatory effort. Hypopnea is a reduction of 25 percent in airflow followed by arousal or desaturation of two percent or more. Upper airway resistance syndrome (UARS) involves frequent arousals in response to increased respiratory effect as a result of upper airway narrowing without overt apnea or hypopnea. This article reviews obstructive sleep apnea (OSA), a problem showing up in 4 percent of American males and 2 percent of American females. The authors stress that the role of dentistry in diagnosing and treating OSA is significant given the profession's knowledge of cephalometric radiography, oral appliances, and orthognathic surgery. Topics include epidemiology, symptoms, diagnostic tests, classification, and treatment options. The case report describes a 32 year old white male whose chief complaints were inability to sleep, snoring, daytime hypersomnolence, lack of energy, inability to sustain exercise, and obesity. 7 figures. 10 references.

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Dental Side Effects of an Oral Device To Treat Snoring and Obstructive Sleep Apnea Source: Sleep. 22(2): 237-240. March 15, 1999. Contact: Available from American Sleep Disorders Association. 6301 Bandel Road, Suite 101, Rochester, MN 55901. (507) 529-0804. Summary: Snoring and obstructive sleep apnea (OSA) are common and related conditions with major social and health implication. These conditions can be treated successfully with dental devices that reposition the mandible (lower jaw). Despite wide use, side effects of these devices have not yet been systematically evaluated. This article reports on a study undertaken to evaluate the side effects of a mandibular advancement

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splint (MAS). The research consisted of a questionnaire survey and dental examination of a consecutive case series of patients treated with the MAS. Attempts were made to contact all 191 patients treated over a 5 year period in a dental outpatient clinic; all patients had snored loudly and habitually with or without OSA prior to treatment. Of 191 patients treated, 132 agreed to complete the questionnaire and 106 underwent examination. Of the 132 interviewed, patient and partner report indicated that the device was well tolerated and controlled snoring satisfactorily in 100 patients after 31 (plus or minus 18) months of use. Dental side effects were reported in 107 patients, although these were mostly minor, and only 10 patients ceased using the device because of them. Side effects included excessive salivation (40 patients), xerostomia (30 patients), temporomandibular joint pain (35 patients), dental discomfort (35 patients), myofacial discomfort (33 patients), and bite changes (16 patients). Of 106 patients examined, 30 had increased maximal opening and 76 had no change compared with pretreatment records. Temporomandibular joint noises were found in 9 patients, and occlusal changes in 15. None of these effects could be related to degree of opening or protrusion produced by the MAS. The authors conclude that dental side effects occur in a significant proportion of patients using the MAS. In most cases, these are minor and their importance must be balanced against the efficacy of the MAS in treating snoring and OSA. 1 appendix. 2 figures. 9 references. (AA-M). •

Dentistry's Role in the Management of Obstructive Sleep Apnea Source: Journal of the Greater Houston Dental Society. 71(4): 29-30. November 1999. Contact: Available from Greater Houston Dental Society. One Greenway Plaza, Suite 110, Houston, TX 77046. (713) 961-4337. Fax (713) 961-3617. E-mail: [email protected]. Website: www.ghds.com. Summary: Snoring may be one symptom of a potentially life threatening sleep related disorder known as obstructive sleep apnea (OSA). This article describes how the dental community is actively playing a role in understanding, managing, and treating OSA. OSA occurs when the pharyngeal airways, which include the tongue, palate, and pharynx, collapse during sleep. The authors outline the signs and symptoms, complications of the condition, diagnosis, treatment, use of oral appliances, and the effects of oral appliance therapy. Dentists may participate in the management of OSA patients by understanding OSA, recognizing the signs and symptoms, developing a relationship with the patient's physician or sleep specialist, and having resources and referrals available for patients. Diagnosis is based on the clinical signs and symptoms, physical examination, as well as head, neck, and oral examinations. Age and obesity are two significant predictors of OSA. The two most commonly used types of oral appliances used during sleep are the tongue retaining device and the mandibular (lower jaw) repositioning splint. 6 references.

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Sleep Apnea in Alzheimer's Patients and the Healthy Elderly Source: Scholarly Inquiry for Nursing Practice: An International Journal. 1(3): 221-235. 1987. Summary: The incidence of sleep apnea was explored in 80 elderly subjects. Through the use of several criteria, sleep apnea was found more frequently in Alzheimer's patients (n equals 24) than in healthy controls (n equals 56). Alzheimer's patients were also found to have a significantly higher proportion of apnea related to non-rapid eye movement than to rapid eye movement sleep. Apnea-positive Alzheimer's patients also had significantly more awake time during the course of the night. A significant positive correlation

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between apnea index and severity of dementia, as measured by the Blessed Dementia Rating Scale, was found for apnea-positive Alzheimer's patients (r equals 0.57, p less than.01) as well as for the entire sample of Alzheimer's patients (r equals 0.41, p less than.05). Neuropathological implications are discussed, as well as the implications for nursing practice. 37 references. (AA). •

Snoring and Obstructive Sleep Apnea From a Dental Perspective Source: CDA Journal. Journal of the California Dental Association. 26(8): 557-565. August 1998. Contact: Available from California Dental Association (CDA). 1201 K Street, Sacramento, CA 95814. (916) 443-0505. Summary: This article considers the problems of snoring and obstructive sleep apnea from a dental perspective. The author stresses the proper diagnosis and treatment of sleep related disorders are best handled via a team approach. This team may include a general dentist treating in conjunction with other sleep specialists. The author provides a dental overview of sleep related breathing disorders, including key definitions, an outline of a diagnostic protocol, a discussion of the factors involved in decision making, and a summary of the wide variety of treatment modalities. Treatment methods discussed include general behavioral measures, surgical approaches (tracheotomy, nasal reconstruction, uvulopalatopharyngoplasty, and orthognathic procedures), and dental appliances. The author concludes with recommendations for the dentist who wishes to play a role in both the recognition and treatment of sleep disorders. These include revising the standard medical questionnaires to include questions on sleep disorders and snoring, revising how the intraoral examination is done (to incorporate evaluation of the oropharyngeal airway, the tongue, the mandible, and the nasal airway), and working closely with other health care professionals. 2 tables. 36 references. (AA-M).

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Diagnosing and Comanaging Patients with Obstructive Sleep Apnea Syndrome Source: JADA. Journal of the American Dental Association. 131(8): 1178-1184. August 2000. Contact: Available from American Dental Association. ADA Publishing Co, Inc., 211 East Chicago Avenue, Chicago, IL 60611. Summary: This article discusses the diagnosis and management of patients with obstructive sleep apnea syndrome (OSAS), a common, but underdiagnosed, disorder that can be fatal. The disorder is characterized by repetitive episodes of complete or partial upper airway obstruction leading to absent or diminished airflow into the lungs. These episodes usually last 10 to 30 seconds and result in loud snoring, a decrease in oxygen saturation, and chronic daytime sleepiness and fatigue. The obstruction is caused by the soft palate, base of the tongue or both collapsing against the pharyngeal walls because of decreased muscle tone during sleep. Potentially fatal systemic illnesses frequently associated with this disorder include hypertension, pulmonary (lung) hypertension, heart failure, nocturnal cardiac dysrhythmias, myocardial infarction (heart attack), and ischemic stroke. The classic signs and symptoms of OSAS may be recognizable by dental practitioners. Common findings in the medical history include daytime sleepiness, snoring, hypertension, and type 2 diabetes mellitus. Common clinical findings include male gender, obesity, increased neck circumference, excessive fat deposition in the palate, tongue (macroglossia) and pharynx, a long soft palate, a small recessive mandible and maxilla, and calcified carotid artery atheromas on parnoramic and lateral cephalometric radiographs. After confirmation of the diagnosis

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by a physician, dentists can participate in management of the disorder by fabricating mandibular advancement appliances and performing surgical procedures that prevent recurrent airway obstruction. 6 figures. 43 references. •

Sleep Apnea in End Stage Renal Disease Source: ANNA Journal. American Nephrology Nurses Association Journal. 24(6): 645654. December 1997. Contact: Available from American Nephrology Nurses Association. Box 56, East Holly Avenue, Pitman, NJ 08071. (609) 256-2320. Summary: This article familiarizes nephrology nurses with the sleep apnea syndrome, a disorder that is characterized by repetitive episodes of the cessation of breathing (apneas) or diminished airflow (hypopneas) that occur during sleep, and is usually, although not always, associated with a reduction in the oxygen saturation of the blood. The author reviews risk factors, clinical features, diagnostic strategies, and treatments. The author also discusses recent research linking sleep apnea with end-stage renal disease (ESRD). In diagnosing sleep apnea syndrome, the total number of apneas and hypopneas that occur during a sleep period are usually added together and then divided by the number of hours spent sleeping to obtain a respiratory disturbance index (RDI). While disrupted sleep and daytime sleepiness are significant problems, cardiopulmonary abnormalities are also important complications associated with sleep apnea. Risk factors for sleep apnea include obesity, craniofacial abnormalities, male gender, certain medical illnesses, lifestyle factors (use of alcohol and central nervous system depressants, smoking, exposure to allergens), and cardiovascular diseases. The author reviews nine studies of ESRD and sleep apnea, all of which demonstrated that sleep apnea has a prominent presence in ESRD, that both hemodialysis and peritoneal dialysis patients are vulnerable to it, and that dialysis itself seems to have little effect on its clinical expression. These studies showed that the incidence of sleep apnea is most likely much higher in this group than in the general population, but they did not succeed in determining the exact prevalence of sleep apnea in chronic renal failure because of subject selection bias and small sample sizes. The author concludes that patients with ESRD who have symptoms related to sleep-wake problems should be evaluated. Treatment of a sleeping disorder thus revealed is likely to have a drastic impact on the quality of life experienced by these patients. 4 figures. 2 tables. 26 references. (AA-M).

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Practice Parameters for the Treatment of Snoring and Obstructive Sleep Apnea with Oral Appliances: An American Sleep Disorders Association Report Source: Sleep. 186(6): 511-513. 1995. Contact: Available from American Sleep Disorders Association. Standards of Practice Committee, 1610 14th Street, N.W., Suite 300, Rochester, MN 55901-2200. (507) 287-6006. Summary: This article presents clinical guidelines, reviewed and approved by the Board of Directors of the American Sleep Disorders Association (ASDA), that provide recommendations for the use of oral appliances for the treatment of snoring and obstructive sleep apnea (OSA). The authors note that the U.S. FDA has approved some of the available oral appliances for the treatment of snoring, with and without OSA, even though limited data from controlled studies supporting the effectiveness and safety of these devices have been published. After a background section briefly describing the problems and morbidity associated with snoring and OSA, the article presents recommendations in the following areas: diagnosis, treatment objectives,

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indications, follow-up, and appliance fitting. A brief recommendations for future research. 1 table. 3 references. •

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Treating Obstructive Sleep Apnea: Can An Intraoral Prosthesis Help? Source: JADA. Journal of the American Dental Association. 126(4): 461-466. April 1995. Summary: This article reports on a study of the effectiveness of an intraoral airway maintenance prosthesis used to treat obstructive sleep apnea syndrome (OSAS). The author presents a review of the relevant literature, and then describes the materials and methods used in the study of five men who were diagnosed with OSAS. The author goes into some detail in his discussion of the cephalometric technique. The prosthesis, which can be constructed and modified easily by a dentist, significantly reduced the number of apneas per night and the syndrome's severity in the subjects studied. 4 figures. 1 table. 13 references. (AA-M).

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Obstructive Sleep Apnea Surgery: Genioglossus Advancement Revisited Source: Journal of Oral and Maxillofacial Surgery. 59(10): 1181-1184. October 2001. Contact: Available from W.B. Saunders Company. Periodicals Department, P.O. Box 629239, Orlando, FL 32862-8239. (800) 654-2452. Summary: This article reports on a study that evaluated the accuracy of a genioglossus advancement (GA) technique (rectangular window) to incorporate the genial tubercle or genioglossus muscle complex (GGC) in patients with obstructive sleep apnea. The prospective study consisted of 38 consecutive patients who underwent GA. All 38 pairs of genial tubercles were captured. Thirty-one patients had both bellies of the genioglossus muscle incorporated. Two patients had a complete belly and a partial (greater than 50 percent) belly of the muscle captured. Five patients had only a portion of both muscle bellies included. The incomplete incorporation of the muscles in the bone flap was caused by the limited lateral extension of the osteotomy beyond the genial tubercles. The causes of the limited lateral osteotomy extension included crowding of the lower incisors as well as the presence of elongated or medially angulated canine roots. The results of this study show that the rectangular osteotomy technique accurately captures the genial tubercles and enables an adequate amount of the genioglossus muscle to be incorporated and advanced. 6 figures. 15 references.

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Glossoptosis (Posterior Displacement of the Tongue) During Sleep: A Frequent Cause of Sleep Apnea in Pediatric Patients Referred for Dynamic Sleep Fluoroscopy Source: AJR (American Journal of Roentgenology). 175(6): 1557-1559. December 2000. Contact: Available from American Roentgen Ray Society. 44211 Slatestone Court, Leesburg, VA 20147-5109. (800) 438-2777 or (703) 729-3353. Fax (703) 729-4839. Email: [email protected]. Summary: This article reports on a study undertaken to evaluate the frequency of glossoptosis (posterior displacement of the tongue) as a cause of sleep apnea in pediatric patients referred for fluoroscopic sleep studies. The authors reviewed seventy consecutive dynamic fluoroscopic sleep studies performed to evaluate sleep apnea. All patients had been sedated and examined with lateral fluoroscopy during sleep. Anatomic changes in the airway were correlated with episodes of oxygen desaturation (lower levels of oxygen in the blood). Cases of glossoptosis, in which the tongue moved posteriorly during sleep and abutted the posterior pharynx (airway), resulting in airway obstruction and oxygen desaturation, were identified. Of the 70 sleep studies reviewed,

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glossoptosis was the cause of airway obstruction in 17 patients (24 percent). Mean age in these 17 patients was 3 years (range, 5 days to 13 years). Seven of the 17 children were younger than 1 year old. Only three patients had no underlying medical problems. Four patients had macroglossia (Down syndrome, n = 3; duplicated tongue, n = 1) as a cause and three patients had micro or retrognathia (small or receding jaw). Six patients had neuromuscular abnormalities. The authors conclude that glossoptosis was a cause of airway obstruction in 25 percent of pediatric patients referred for fluoroscopic sleep studies. Attention to this anatomic region is important when evaluating children with sleep apnea. 2 figures. 19 references. •

Sleep Apnea: A Serious Disorder Source: Access. 9(7): 32-36. August 1995. Contact: Available from American Dental Hygienists' Association (ADHA). 444 North Michigan Avenue, Chicago, IL 60611. (800) 243-2342 or (312) 440-8900; Fax (312) 4408929; E-mail: [email protected]; http://www.adha.org. Summary: This article, from a journal for dental hygienists, reviews the problem of sleep apnea and its precursor, snoring. Topics covered include the epidemiology of sleep apnea; obstructive sleep apnea (OSA); the symptoms of snoring and sleep apnea; the consequences of an OSA episode; central sleep apnea (CSA); the association of sleep apnea and hypertension; treatment options, including nonsurgical, nonpharmalogical interventions, pharmacological interventions, and surgical interventions; and the oral health care professional's responsibility with regard to sleep apnea. One sidebar describes the appliances that have received FDA clearance for the treatment of snoring. 18 references.

Federally Funded Research on Apnea The U.S. Government supports a variety of research studies relating to apnea. These studies are tracked by the Office of Extramural Research at the National Institutes of Health.2 CRISP (Computerized Retrieval of Information on Scientific Projects) is a searchable database of federally funded biomedical research projects conducted at universities, hospitals, and other institutions. Search the CRISP Web site at http://crisp.cit.nih.gov/crisp/crisp_query.generate_screen. You will have the option to perform targeted searches by various criteria, including geography, date, and topics related to apnea. For most of the studies, the agencies reporting into CRISP provide summaries or abstracts. As opposed to clinical trial research using patients, many federally funded studies use animals or simulated models to explore apnea. The following is typical of the type of information found when searching the CRISP database for apnea:

2 Healthcare projects are funded by the National Institutes of Health (NIH), Substance Abuse and Mental Health Services (SAMHSA), Health Resources and Services Administration (HRSA), Food and Drug Administration (FDA), Centers for Disease Control and Prevention (CDCP), Agency for Healthcare Research and Quality (AHRQ), and Office of Assistant Secretary of Health (OASH).

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Project Title: A HIGH-THROUGHPUT ASSAY FOR GENETIC STUDIES OF SLEEP Principal Investigator & Institution: Heller, Horace Craig.; Professor and Chair; Biological Sciences; Stanford University Stanford, Ca 94305 Timing: Fiscal Year 2001; Project Start 30-SEP-1999; Project End 31-AUG-2002 Summary: Arousal states are a fundamental aspect of global nervous system function; yet, measures of sleep and wake are rarely performed in genetically altered mice due to the difficulty of EEG analysis. We propose to develop a high-throughput alternative to EEG recordings in mice that will greatly facilitate the measurement of sleep and wake. Our system utilizes a simple piezoelectric transducer comprising the flexible floor upon which the animal rests. Distension of the floor by respiratory or other movements produces electrical signals. During slow wave sleep, rhythmic breathing results in a consistent, regular pattern of electical signals. REM sleep produces a less consistent signal due to more irregular breathing, while wake produces a dramatically irregular pattern caused by a variety of movements. Therefore, all three vigilance states can be accurately determined. We have already validated this system in young rats. Since no surgery is required and the signal patterns are simpler than those produced by EEG, the technology to perform high-throughput phenotyping of arousal states will be relatively easy. An immediate test and use of our system will be to investigate genes that underlie sleep parameters. Twin studies, adoption studies, and the analysis of inbred strains of mice have demonstrated that variation in sleep related traits are largely determined by genotype. Specifically, we propose to validate our system in common inbred strains of mice by comparing our piezo recordings with traditional EEG recordings. Based on our prior EEG data, we expect to confirm large sleep differences between AKR/J and DBA/2J inbred strains. This will be followed by examination of AKD2F1 hybrids and AKXD recominant inbred lines. QTL analysis of these data should identify candidate loci that underlie the variability of sleep traits in these two strains. With this high throughput system we will also be able to examine large numbers of progeny from appropriate genetic crosses between these or other strains to confirm putative QTLs. This system also makes large scale screening of mutagenized mice far more feasible, and we will begin to examine such mice in the proposed study. In general, the project we propose will provide an important index of nervous system function, and specifically will allow genetic approaches towards understanding sleep and sleep disorders that would not be possible with existing technology. Website: http://crisp.cit.nih.gov/crisp/Crisp_Query.Generate_Screen

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Project Title: ABSOLUTE NEAR INFRARED BRAIN OXIMETER Principal Investigator & Institution: Michalos, Antonios; Iss, Inc. 1602 Newton Dr Champaign, Il 61822 Timing: Fiscal Year 2003; Project Start 12-SEP-2000; Project End 31-MAY-2005 Summary: (provided by applicant): Our goals in Phase I have been completed and showed the feasibility of our approach. We applied Near-Infrared Spectroscopy (NIRS), a non-invasive method and an affordable, portable, bedside technique for the diagnosis of the degree of the hypoxic insult in the brain, in sleep apnea, during daytime napping. It has been suggested that chronic, recurrent hypoxia during sleep leads to brain injury, which causes neuropsychological deficits and decline of cognitive function. Cerebrovascular accidents, including fatal strokes are not uncommon. Conventional polysomnography, a relatively expensive test, detects sleep apnea at various sleep stages and determines arterial oxygen saturation. However, current clinical methods do not provide information on brain oxygenation, which is important especially in subjects

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with preexisting anatomical or functional vascular pathology. NIRS enables continuous real-time measurements of changes in the hemoglobin oxygenation and blood volume, thus providing information on tissue oxygenation and hemodynamics. In Phase II we propose the development of a tool and the application of NIRS to determine cerebral hemodynamics during sleep, in association to overnight polysomnographic sleep studies. Our goal is the development of reliable, cost efficient instrumentation for early detection of cerebral hemodynamic abnormalities in sleep apnea, for the prevention of hypoxic cerebral morbidity and mortality. Website: http://crisp.cit.nih.gov/crisp/Crisp_Query.Generate_Screen •

Project Title: ACTIVATION OF TONGUE MUSCLES IN OBSTRUCTIVE SLEEP APNEA Principal Investigator & Institution: Durand, Dominique M.; Professor; Biomedical Engineering; Case Western Reserve University 10900 Euclid Ave Cleveland, Oh 44106 Timing: Fiscal Year 2001; Project Start 01-FEB-2001; Project End 31-DEC-2004 Summary: adapted from applicant's abstract) This project aims to develop an experimental therapy for obstructive sleep apnea (OSA) using electrical stimulation of the hypoglossal nerve. The PI proposes to use a multi-channel stimulation technique for selective activation of portions of the hypoglossal nerve to activate individual tongue muscles selectively. Such stimulation might increase control over the tongue muscles and improve efficiency for electrical stimulation to remove pharyngeal obstruction. There are 3 aims to be tested in dogs. Aim 1 will determine the maximum muscle selectivity that can be obtained with a multi-contact electrode on the hypoglossal nerve. Aim 2 will evaluate the mechanical dilation of the airways due to selective stimulation. Aim 3 will determine the optimum electrode geometries and stimulation paradigms for airway dilation in chronic dogs. It is anticipated that the experimental delineation and validation of these methods will lead to a design of a neuroprosthetic device for the treatment of OSA. Website: http://crisp.cit.nih.gov/crisp/Crisp_Query.Generate_Screen

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Project Title: ADVANCED AT-HOME SCREENING DEVICE FOR SLEEP APNEA Principal Investigator & Institution: Cooke, Arthur V.; Active Signal Technologies, Inc. 13025 Beaver Dam Rd Cockeysville, Md 21030 Timing: Fiscal Year 2001; Project Start 15-JUN-1999; Project End 31-AUG-2003 Summary: Active Signal Technologies proposes to further develop its self applied, electrodeless home monitoring device for sleep apnea with the ultimate goal of making clinical diagnosis available to a much larger population of sleep disorder patients than currently possible. Preliminary results from Phase I have shown that much of the diagnostically rich airflow information captured in the sleep lab with a nasal mask and pneumotachograph can be replicated using an unobtrusive external tracheal contact sensor. Because this flow data has such important ramifications, the present proposal is being directed primarily to optimizing the sensor to work uniformly across a wide variety of cervical morphometries, and building real-time signal processing routines to separate snore, obstruction sounds, etc, from the broadband "hiss" of pure air movement in the trachea. This specific focus recognizes the broad application potential of the breathing sensor, not only as a critical component for the home monitoring device and as an alternative to a mask in the sleep lab but also throughout the field of respiratory care. In addition, the sensor captures far more acoustic information than just quantitative tidal volume and qualitative flow patterns, and hence can be used to

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characterize obstruction, respiratory effort, etc. PROPOSED COMMERCIAL APPLICATIONS: With approximately 10 million people suffering from obstructive sleep apnea alone yet