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分析因各种原因取出的放置不同年限的含铜硅胶Ｖ形宫内节育器（ＶＣｕ２００ＩＵＤ）６６６个，观察其铜丝不完整率和铜丝的腐蚀、耗铜、释铜、铜段脱落以及ＶＣｕ２００ＩＵＤ的制作材料变化。结果：ＶＣｕ２００ＩＵＤ放置５～１０年和１０～１５年之间银丝不完整率分别为１２．３６％、２５．５３％，二者差异有显著性（Ｐ（０．００１）；整段铜丝脱落率分别为２．５４％、９．５７％，二者差异有显著性（Ｐ＜０．０５）。耗铜和释铜，６～１０年为３９．７３％，每日２２．９５μｇ。因腐蚀致使铜丝断裂最早发生于放置３年，整段铜丝脱落最早发生于放置５年。提示：ＶＣｕ２００ＩＵＤ以放置１０年为宜。
Analysis of 666 silicone-containing V-shaped intrauterine devices (VCu200IUD) with different ages, which were taken out for various reasons, were used to observe the incompleteness of copper wire and the corrosion of copper wire. Copper consumption, copper release, copper loss and VCu200IUD The production of materials changes. Results: The incomplete rates of silver filaments in VCu200IUD for 5 to 10 years and 10 to 15 years were 12.36% and 25.53%, respectively, with significant difference (P (0.001) The rate of shedding was 2.54% and 9.57%, respectively, with significant difference (P <0.05). Copper consumption and copper release were 39.73% in 6-10 years and 22.95μg / day. Corrosion caused by copper wire fracture occurred in the earliest place for 3 years, the entire loss of copper occurred in the earliest place for 5 years. Tip: VCu200IUD to place 10 years is appropriate.