摘要
目的应用核磁共振成像（MRI）技术，评价提颏对健康清醒成人上呼吸道结构的影响。方法选择健康志愿者16名，年龄21～35岁，BMI17～26kg／m2，在标准体位及提颏状态下进行MRI扫描，取正中矢状而T2WI，测量软腭段最短前后径、舌根段最短前后径、会厌游离缘末端前后径、会厌段最短前后径、咽腔面积及各项的增加百分比。结果与标准体位比较，提颏后软腭段、舌根段、会厌段最短前后径、会厌游离缘末端前后径延长，咽腔面积增加（P〈0．01）。提颏后会厌游离缘末端前后径增加百分比最高（P〈0．01）．结论提颏能明显改善健康清醒成人上呼吸道的通畅程度，会厌游离缘末端位置的改变及咽腔面积的增加对七呼吸道的通畅影响最明显。
Objective To investigate the effects of chin lift on the patency of upper airway in normal con- scious adults using magnetic resonance imaging （MRI） .Methods Sixteen healthy volunteers aged 21-35 yr with a body mass index of 17-26 kg/m2 were enrolled in this study. The subjects lay on their back with their heads slightly extended. The lower jaw was first left in standard position. The mouth was slightly open （the distance between the upper and lower incisors was 0,5 cm） . The chin was then lifted upward. The upper airway （from the base of stull to the level of vocal cord） was scaned by MR1 along the median sagital plane. The length of soft palate, root of tongue and epiglottis and the area of pharyngeal cavity were measured. The position of the rim of epiglottis was ex- amined. The mean percentage changes induced by chin lift were calculated. Results Compared with standard po- sition, chin lift significantly prolonged the length of soft palate, root of tongue and epiglottis and increased the area of pharyngeal cavity. The percentage change in the position of the rim of epiglottis was largest after chin lift. Conclusion Chin lift significantly improve the patency of the upper airway in conscious aduh by changing the position of the rim of epiglottis and increasing the area of pharyngeal cavity.
出处
《中华麻醉学杂志》
CAS
CSCD
北大核心
2012年第9期1037-1039,共3页
Chinese Journal of Anesthesiology
关键词
颏
磁共振成像
上呼吸道
Chin
Magnetic resonance imaging
Upper airway
