Urbanowicz J H, Kernoff R S, Oppenheim G, Parnagian E, Billingham M E, Popp R L
Stanford University School of Medicine, California.
Anesthesiology. 1990 Jan;72(1):40-3. doi: 10.1097/00000542-199001000-00008.
The purpose of this study was to determine whether the pressure produced by contact between a transesophageal echocardiography (TEE) probe and the esophagus was sufficient to cause esophageal damage. The authors studied the effects of sustained contact and associated surface pressure on the esophagus by a TEE probe in anesthetized dogs and humans. Contact pressure between the tip of the probe and the esophageal wall in dogs was measured using a previously described flat balloon of Silastic fitted to the end of a TEE probe and the recording system calibrated with a mercury manometer. In the dog studies, the probe was inserted, maximally flexed, and its position fixed for 4, 6, 8, and 12 h. The maximum surface pressure generated by contact between a probe and the esophageal wall was 10 mmHg. Subsequent pathologic studies failed to reveal either gross or microscopic evidence of tissue damage. The same system was used in short-term patient studies with the surface contact pressure transducer connected to a Camino Catheter 420 Digital Pressure Monitor. In five of six patients contact pressure was less than 17 mmHg despite maximal rotation of the TEE controls. However, one of the six patients developed very high contact pressure, up to 60 mmHg, between the probe and the esophagus. This patient had no history of esophageal disease but did have intrathoracic pathology.(ABSTRACT TRUNCATED AT 250 WORDS)
本研究的目的是确定经食管超声心动图（TEE）探头与食管之间接触所产生的压力是否足以导致食管损伤。作者通过TEE探头研究了在麻醉犬和人类中持续接触及相关表面压力对食管的影响。在犬类实验中，使用先前描述的安装在TEE探头末端的硅橡胶扁平球囊测量探头尖端与食管壁之间的接触压力，并用水银压力计对记录系统进行校准。在犬类研究中，插入探头，最大限度地弯曲并固定其位置4、6、8和12小时。探头与食管壁接触产生的最大表面压力为10 mmHg。随后的病理学研究未发现组织损伤的大体或微观证据。在短期患者研究中使用了相同的系统，将表面接触压力传感器连接到卡米诺导管420数字压力监测仪。在六名患者中的五名中，尽管TEE控制装置进行了最大程度的旋转，但接触压力仍低于17 mmHg。然而，六名患者中的一名在探头与食管之间产生了非常高的接触压力，高达60 mmHg。该患者无食管疾病史，但有胸腔内病变。（摘要截断于250字）
