正常成人颅咽腔的CT测量及其意义

The significance of CT measurement of craniopharyngeal cavity in health person

目的 :探讨颅咽腔的变化在睡眠呼吸暂停综合征 (OSAS)患者发病中的意义。方法 :对 5 0例健康成人用荷兰菲利浦公司SCT 70 0 0型螺旋式全身扫描机进行颅咽腔测量。测定 :①鼻咽腔层面 (咽隐窝和咽鼓管口均清楚的层面 ) ;②口咽腔层面 (口咽腔最狭小的层面 ) ;③喉咽腔层面 (会厌软骨刚刚显示的层面 )。各组数字作t检验。结果 :口咽腔 (2 .2 8± 1.17)cm2 ,鼻咽腔 (4.39± 1.5 2 )cm2 (P <0 .0 5 ) ,喉咽腔 (3.83± 1.5 7)cm2 (P <0 .0 5 )。结论 :正常人口咽腔是口咽部生理性狭窄的部位 ,也最易发生阻塞。其大小的改变对OSAS的发病有重要影响。

Objective:In order to investigate where is the most part in upper airway of patients with obstructive sleep apnea syndrome (OSAS). The craniopharyngeal cavity in 50 healthy persons was measured by CT.Method:The 50 volunteers were instructed on supine position. The Scanning was made taken with SCT 7000 spiral computer (Philips company Holland). Scanning was from cupular part of nasopharyngeal cavity to an apex of epiglottis cartilage on the datum line of lower eye socket, every stratum was 5mm,every lamella distance was 8mm. Scanned and took photographs up and down using RIO MAN key (Region of interesting Management). Some irregular area were selected to measure such as ①the lamella of nasopharyngeal cavity(the pharynges and opening of auditory tube were showed clearly); ②the lamella of oropharyngeal cavity(the narrowest place of oropharyngeal cavity);③the lamella of laryngolpharyngeal cavity(epiglottis cartilage was just appeared).T test was used to analyze.Result:The areas of oropharyngeal, nasopharyngeal and pharyngolaryngeal cavity were ( 2.28 ± 1.17 )cm 2. ( 4.39 ± 1.52 )cm 2 and ( 3.83 ± 1.57 )cm 2 respectively (P< 0.05 ).Conclusion:The oropharyngeal cavity is the physiologic narrow place of pharyngeal cavity in normal adults and it is easily obstructed and lead to a chain of pathologic and physiologic manifestations.