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90天1针的炔诺酮(NET)微球为第二代缓慢释放型避孕针,系用溶剂蒸发制备微球,直径25～90μm,含NET47%(重量百分比),NET混和于丙交酯-乙交酯多聚体中,经γ射线灭菌,注射时用3ml稀释液(内含2%羧甲基纤维素,1%吐温20,97%生理盐水)稀释后作臀部肌肉注射,
The 90-day, 1-gauge norethindrone (NET) microspheres were the second generation slow-release contraceptives. They were prepared by solvent evaporation and were prepared from microspheres with a diameter of 25-90 μm and containing NET47% (weight% - glycolide multimer, sterilized by gamma irradiation, injected with 3 ml of diluent (containing 2% carboxymethylcellulose, 1% Tween 20, 97% normal saline) diluted intramuscularly into the buttocks,