sleep apnea


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Posted by Thomas/Munich (195.27.213.20) on April 29, 2001 at 15:11:17:

In Reply to: Hi Wendy... posted by Paco on April 27, 2001 at 05:29:40:

Untill now n o b o d y claims that SA c a u s e s CH !!! So a great part of this discussion is irrelevant to the question whether you shoud have
a study in a sleep lab or not - as long as there is a suspicion of SA have the study done, beeing a clusterhead or not !

Here I post for the third time the following article and web sides about SA:

SLLEP DISORDERED BREATHING IN PATIENTS WITH
CLUSTERHEADACHES
R. D. Chervin, MD, MS, S. Nath Zallek, MD, X. Lin, PhD, J. M. Hall, MA, MS, N. Sharma, BS and K. M. Hedger, RN, BSN
From the Sleep Disorders Center, Department of Neurology (Drs. Chervin and Nath Zallek, J.M. Hall, N. Sharma, and K.M. Hedger) and the Department of Biostatistics (Dr. Lin), University of Michigan, Ann Arbor, MI.

Address correspondence and reprint requests to Dr. Ronald D. Chervin, Sleep Disorders Center, University
Hospital 8D8702, Box 0117, 1500 E. Medical Center Dr., Ann Arbor, MI 48109-0117; e-mail: chervin@umich.edu

OBJECTIVE: To study subjects with active or inactive cluster headache (CH) for occult sleep disordered
breathing (SDB).

BACKGROUND: CH frequently occurs during sleep. The authors previously found that symptoms of SDB
predicted reported occurrence of CH in the first half of the night, which suggested that CH could be triggered
in some cases by unrecognized SDB.

METHODS: The authors performed polysomnography in 25 adults (22 men) with CH. Subjects were not selected
for any sleep-related complaint. In addition to standard measures, studies included monitoring of end-tidal carbon
dioxide (n = 22), and esophageal pressure (n = 20).

RESULTS: The rate of apneas and hypopneas per hour of sleep was >5 in 20 subjects (80%; 95% CI, 64% to 96%),
minimum oxygen saturation was <90% in 10 subjects, maximum negative esophageal pressure ranged from
-13 to -65 cm H2O, and maximum end-tidal carbon dioxide was 50 mm Hg in eight subjects. The eight subjects
with active (versus inactive) CH at the time of study had higher maximum end-tidal carbon dioxide levels (50 3
versus 44 5 mm Hg; p = 0.0007). More severe oxygen desaturation was associated with reports that CH typically
occurred in the first half of the nocturnal sleep period (p = 0.008).

CONCLUSIONS: SDB occurred in the majority of patients with CH. Evaluation of a patient with CH should include
consideration that SDB may be present.

Web sites about SA:
www.sleep-apnea.ab.ca
www.sleepapnea.org
www.newtechpub.com/phantom/faq/osa_faq.htm

Thomas,MD






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