Shanks J E, Stelmachowicz P G, Beauchaine K L, Schulte L
VA Medical Center, Long Beach, California.
J Speech Hear Res. 1992 Aug;35(4):936-41. doi: 10.1044/jshr.3504.936.
Pre- and postoperative equivalent ear canal volume measures were obtained from a group of 334 children ranging in age from 6 weeks to 6.7 years. The purpose of the study was to develop volumetric guidelines for the determination of tympanostomy tube patency. For children 4 years and older, almost no ambiguity existed in making this determination accurately. For younger children, the pre- and postoperative distributions overlap. A criterion value of greater than or equal to 1.0 cm3 as an indicator of a tympanic membrane perforation appears to yield the lowest possible error rate. When both pre- and postoperative measures are available, a difference of greater than or equal to 0.4 cm3 can be used in conjunction with the absolute value to identify a patent tympanostomy tube.
从一组年龄在6周龄至6.7岁的334名儿童中获取术前和术后等效耳道容积测量值。本研究的目的是制定用于确定鼓膜置管通畅性的容积指南。对于4岁及以上的儿童，准确做出这一判定几乎不存在歧义。对于年龄较小的儿童，术前和术后的测量值分布存在重叠。鼓膜穿孔的指标值大于或等于1.0立方厘米似乎能产生尽可能低的错误率。当术前和术后测量值都可获得时，大于或等于0.4立方厘米的差值可与绝对值结合使用，以识别通畅的鼓膜置管。
