在近半数成年患者中，环状软骨和食管并未紧密对齐。

The cricoid cartilage and the esophagus are not aligned in close to half of adult patients.

作者信息

Smith Kevin J, Ladak Shayne, Choi Peter T-L, Dobranowski Julian

机构信息

Department of Anesthesia, St. Joseph's Healthcare and McMaster University, Hamilton, Ontario, Canada.

出版信息

Can J Anaesth. 2002 May;49(5):503-7. doi: 10.1007/BF03017931.

DOI:10.1007/BF03017931

PMID:11983669

Abstract

PURPOSE

To determine the frequency and degree of lateral displacement of the esophagus relative to the cricoid cartilage ("cricoid") using computed tomography (CT) images of normal necks.

METHODS

Fifty-one cervical CT scans of clinically normal patients were reviewed retrospectively. Esophageal diameter, distance between the midline of the cricoid and the midline of the esophagus, and distance between the lateral border of the cricoid and the lateral border of the esophagus were measured.

RESULTS

Lateral esophageal displacement was observed in 49% (25/51) of CT images. When present, the mean length of displaced esophagus relative to the midline of the cricoid was 3.3 mm +/- SD 1.3 mm. Of those with lateral displacement, 64% had esophageal displacement beyond the lateral border of the cricoid (mean 3.2 mm +/- SD 1.2 mm). There is a relatively normal distribution of the grouped measures of percentage of esophageal diameter that is displaced. Of those with displacement, 48% had over 15% of the total width of the esophagus displaced laterally and 20% had over 20% of the esophageal width displaced laterally.

CONCLUSION

There is a 49% frequency of some degree of lateral displacement of the esophagus relative to the cricoid.

摘要

目的

利用正常颈部的计算机断层扫描（CT）图像，确定食管相对于环状软骨（“环状软骨”）的侧向移位频率和程度。

方法

回顾性分析51例临床正常患者的颈部CT扫描图像。测量食管直径、环状软骨中线与食管中线之间的距离以及环状软骨外侧缘与食管外侧缘之间的距离。

结果

49%（25/51）的CT图像观察到食管侧向移位。出现移位时，相对于环状软骨中线的移位食管平均长度为3.3毫米±标准差1.3毫米。在有侧向移位的患者中，64%的食管移位超出环状软骨外侧缘（平均3.2毫米±标准差1.2毫米）。食管直径移位百分比的分组测量呈相对正态分布。在有移位的患者中，48%的食管总宽度侧向移位超过15%，20%的食管宽度侧向移位超过20%。