CT measure of pharynx of OSAHS patients / 中国耳鼻咽喉头颈外科

ABSTRACT

OBJECTIVE To investigate the location and degree of pharyngeal narrowing in patients with ob-structive sleep apnea-hypopnea syndrome(OSAHS). METHODS Fifty patients with OSAHS were divided into two groups. The first group was examined with single layer helix CT at an awaken state. The second group was examined with single and 16 layer helix CT at an asleep state. Control group was 225 healthy adults. RESULTS The average minimum diameter of pharynx at soft palate level was 5.85 mm and the aver-age minimum section proportion was 50.3 mm2 in the first group. The average minimum diameter and the av-erage minimum section proportion of pharynx at soft palate level were 2.88 mm and 31.5 mm2, and 1.62 mm and 6.3 mm2 as examined with single layer and 16 lay-ers helix CT scan respectively in the second group. CONCLUSION CT can be used as a method for esti-mating the degree of pharyngeal narrowing in patients with OSAHS. 16 layer helix CT scan can reflect the actual pharyngeal narrowing in OSAHS patients while sleeping more accurately.