Esophageal pressure monitoring increases the diagnostic value of limited polygraphic recording as a screening study for sleep-disordered breathing.
This was the conclusion of a prospective study of 67 consecutive patients with snoring who underwent an overnight study on a ward. The study was carried out by Dr. Paula Virkkula and colleagues at the Helsinki University Central Hospital, Helsinki, Finland.
The polygraphic recording was limited to the following: oxygen saturation, respiratory and leg movements, airflow, body position, and snoring sound. Patient compliance with the esophageal catheter was 87 percent. Esophageal pressure monitoring increased the detection of sleep-disordered breathing with limited polygraphic recording.
It was found that 67 percent of the patients with normal oxygen desaturation index and respiratory-related esophageal pressure variation had sleep-disordered breathing on complete polysomnography.
Increased esophageal pressure variation was significantly related to oxygen desaturation index and obstructive sleep apnea diagnosis.
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