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本文系统报导了1977年6月以后三年中,有关宫颈管内T型微量释放左旋十八甲基炔诺酮节育器(Ng-mT)的研究,并与宫腔内左旋十八甲基炔诺酮节育器(Ng-T)、及宫腔内含铜节育器(Cu-T-200)临床应用的比较。Ng-mT节育器是T型,全长36mm,横臂的长度为16mm,纵干下部均匀地涂以活性硅及左旋十八甲基炔诺酮的混合物(20mm),并在距顶点10mm处以下包以惰性硅释放控制器。这种装置每天约释放10μg左旋十八甲基炔诺酮,可维持5年。节育器的线尾部每隔1cm有一小结,作为放置深度的标志。放置时,T型横臂可摺叠与纵干并拢,放
This article systematically reports the release of levonorgestrel (Ng-mT) from T-type microvessels in the cervical canal over the three years after June 1977 and is associated with the intrauterine levodropenem Comparison of the clinical application of Ng-T and intrauterine copper-containing IUDs (Cu-T-200). Ng-mT IUD is a T-shaped, full-length 36mm, transverse arm length of 16mm, the lower part of the vertical dry coated with a mixture of active silicon and levonorgestrel (20mm), and 10mm from the apex The following packs release the controller with inert silicon. This device releases approximately 10 μg of levododecyl norethindrone per day for up to 5 years. Inellers line tail every 1cm have a summary, as a sign of the depth of placement. When placed, the T-shaped cross arm can be folded together with the vertical stem, put