Kaivola S
Adv Contracept. 1986 Jun;2(2):177-83. doi: 10.1007/BF01849228.
The total uterine and endometrial cavity lengths of 212 nulliparous and 331 parous women were measured with Hasson's Wing Sound 1 Cavimeter prior to insertion of IUDs. A rather poor correlation between these two measurements was established, indicating that the total uterine sound measurement does not give reliable information about the endometrial cavity length. Furthermore, the cavimetric measurements showed that a majority of both nulliparous and parous uterine cavities were less than 35 mm in length. Consequently, the devices of standard size on the market are too long for most uterine cavities. The results of 543 tailor-made insertions showed that the tailoring of IUD length according to the endometrical cavity length produces better clinical performance. In particular, the continuation rates improved whereas the pregnancy rates remained practically unchanged.
在放置宫内节育器（IUD）之前，使用哈森氏翼音1型宫腔测量仪对212名未生育女性和331名已生育女性的子宫及子宫内膜腔总长度进行了测量。这两项测量之间的相关性较差，表明子宫总长度测量并不能提供关于子宫内膜腔长度的可靠信息。此外，宫腔测量结果显示，未生育和已生育女性的大多数子宫腔长度均小于35毫米。因此，市场上标准尺寸的器械对大多数子宫腔来说太长了。543例量身定制放置的结果表明，根据子宫内膜腔长度定制IUD长度可产生更好的临床效果。特别是，持续使用率提高了，而妊娠率实际上保持不变。
