Koch U, Straehler-Pohl H J
Laryngol Rhinol Otol (Stuttg). 1981 Dec;60(12):654-7.
Patients with epitympanic cholesteatomas, where the intact canal technique was performed, were observed over 5 resp. 6 years following surgery. While in 27 out of 55 patients a new epitympanic retraction of the tympanic membrane was found, only in 4 cases in these pockets a cholesteatoma developed. This, including the residual cholesteatoma, represents the most important postoperative complication. In tube pressure equalization test we found in 43% of the patients tested an almost normal tube function; in the other patients the tube function is impaired to a varying extent. According to our test results postoperative retraction pockets develop independent of tube function. Even in normal tube function, inserted grommets or perforations of the tympanic membrane - where a sufficient aeration of the middle ear is secured - retraction pockets of varying dimensions may develop. Factors which support the formation of postoperative epitympanic retraction pockets and the part of the tube function are discussed.
对采用完整外耳道技术治疗的上鼓室胆脂瘤患者，在术后分别进行了5年和6年的观察。在55例患者中，有27例发现鼓膜出现新的上鼓室回缩，而在这些陷窝中只有4例发生了胆脂瘤。这一情况，包括残留胆脂瘤，是最重要的术后并发症。在咽鼓管压力平衡测试中，我们发现43%接受测试的患者咽鼓管功能几乎正常；其他患者的咽鼓管功能则有不同程度的受损。根据我们的测试结果，术后回缩性陷窝的形成与咽鼓管功能无关。即使在咽鼓管功能正常、置入了鼓膜通气管或鼓膜穿孔（能确保中耳充分通气）的情况下，仍可能出现不同大小的回缩性陷窝。文中讨论了支持术后上鼓室回缩性陷窝形成及咽鼓管功能所起作用的因素。
