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Study shows that surgical weight loss does not eliminate obstructive sleep apnea
Date:8/14/2008

sence of OSA and define its severity, is the most important determinant of whether or not an individual will be cured of the disease. Individuals with a lower AHI may experience complete resolution of their OSA.

Twenty-four consecutive patients referred to the Pulmonary Critical Care and Sleep Medicine Service for preoperative evaluation of excessive daytime somnolence (EDS) prior to bariatric surgery were included in the study. Patients on average were 47.9 years, and most (75 percent) were women. Each was assessed by overnight polysomnography prior to and one year after undergoing bariatric surgery.

Postoperative polysomnography revealed reductions in the AHI in 22 subjects. Of the 12 patients whose AHI improved sufficiently to reclassify their OSA severity, three (12.5 percent) improved by more than one category of severity. Twenty-three patients had persistent OSA at follow-up. One patient had AHI less than five and no longer met the criteria for a diagnosis of OSA.

Although only seven patients (29 percent) subjectively complained of snoring postoperatively, all but one (96 percent) snored during the follow-up polysomnography. Significant improvements were noted on the Epworth Sleepiness Scale (EES); however, nearly half reported a persistence of daytime somnolence and more than half (54 percent) continued to have ESS scores greater than 10.

The authors of this study note that patients and physicians need to recognize that the subjective resolution of snoring after surgical weight loss does not equate to improvements or cure of OSA.


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Contact: Kelly Wagner
kwagner@aasmnet.org
708-492-0930
American Academy of Sleep Medicine
Source:Eurekalert

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