Ekberg O
Br J Radiol. 1986 Sep;59(705):875-9. doi: 10.1259/0007-1285-59-705-875.
The motor function of the pharyngo-oesophageal (PO) segment during swallowing in terms of tonicity, relaxation and peristalsis was evaluated in 25 patients with a posterior cricopharyngeus impression. Functional abnormalities were common. Defective tonicity was present in 11 patients. Relaxation was normal in all patients except at the level of the cricopharyngeal muscle. Abnormal peristalsis was present in 19 patients as weakness, paresis or abnormal timing. The impression of the cricopharyngeus was effaced during the late stage of swallowing due to collapse proximal and distal to the cricopharyngeus. It was not due to successive distension at the level of the cricopharyngeus. In 11 patients there was some retention of barium proximal to the cricopharyngeus after the passage of the barium bolus. This was due to weakness in the inferior pharyngeal constrictor and/or an abnormal timing of the peristalsis whereby contraction of the cricopharyngeus occurred before peristalsis in the inferior pharyngeal constrictor had cleared the pharynx of barium. The observations indicate that bulging of the cricopharyngeal muscle is only one aspect of a profoundly altered motor function of the PO segment.
对25例有环状咽肌压迹的患者吞咽时咽食管（PO）段的运动功能，从张力、松弛和蠕动方面进行了评估。功能异常很常见。11例患者存在张力缺陷。除环咽肌水平外，所有患者的松弛功能正常。19例患者存在异常蠕动，表现为无力、麻痹或时间异常。由于环咽肌近端和远端塌陷，吞咽后期环咽肌的压迹消失。这并非由于环咽肌水平的连续扩张所致。11例患者在钡剂团通过后，环咽肌近端有一些钡剂潴留。这是由于咽下缩肌无力和/或蠕动时间异常，导致环咽肌在咽下缩肌蠕动清除咽部钡剂之前就发生了收缩。这些观察结果表明，环咽肌膨出只是PO段运动功能严重改变的一个方面。
