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Norplant 系将左旋18甲基炔诺酮装入微型硅胶管内的皮下植入避孕剂,有效期长达5年,是一种可逆的长效节育措施。天津使用的皮下埋置剂是由世界人口理事会提供,有两种型号,一种是6根型(Ⅰ型),有微型硅胶管6根,每根硅胶管长34×2.4mm(φ),含左旋18甲基炔诺酮30mg,总量216mg。另一种是2根型(Ⅱ型),每根硅胶管44×2.4mm(φ),每根含药70mg,总量140mg。
Norplant is a reversible long-term contraceptive for subcutaneous implantable contraceptives containing levonorgestrel 18 in a micro silicone tube for up to 5 years. The subcutaneous implant used in Tianjin is provided by the World Population Council. There are two models, one is 6 type (type I), there are 6 miniature silicone hose, each with 34 × 2.4mm (φ) , Containing 18-norgestrel norethisterone 30mg, total 216mg. The other is 2 type (type Ⅱ), each silicone tube 44 × 2.4mm (φ), each containing drug 70mg, total 140mg.