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    • 4. 发明授权
    • Hydrocephalic antenatal vent for intrauterine treatment (HAVIT)
    • 用于宫内治疗的脑积水产前通气(HAVIT)
    • US4413985A
    • 1983-11-08
    • US325730
    • 1981-11-30
    • Edward WellnerMaria MichejdaGary D. Hodgen
    • Edward WellnerMaria MichejdaGary D. Hodgen
    • A61M1/00A61M27/00
    • A61M39/0247A61M27/006A61M2039/025A61M2039/0261A61M2039/027A61M2039/0276A61M2210/02A61M2210/145
    • A hydrocephalic drainage valve consisting of a hollow shank with a pointed conical tip. The shank has an intake port adjacent the conical tip. A ball check valve in the shank is urged by a coiled spring toward closing relationship with the port. A hollow set screw is adjustably mounted in the shank to vary the biasing force on the valve ball. In one form, for manual implantation, a sleeve is slidably mounted on the shank, has a centrally apertured enlarged head and has implantation enlarged threads near the head. The head has aligned opposite radial grooves which are engageable by a manual insertion tool. In other forms, for pneumatic insertion, the shank has an enlarged head, employed as a driving piston in a pneumatic insertion tube. A washer member with implantation barbs is slidably mounted on the shank and is arranged to be locked to the shank subjacent the head responsive to the pneumatic driving action, with its barbs embedded in the fetal skin around the implantation puncture, thus holding the shank in operating position with the intake port exposed in the cranial vault.
    • 一种脑积水引流阀,由具有尖锐锥形尖端的中空柄组成。 柄具有邻近锥形尖端的进气口。 螺栓中的球止回阀被螺旋弹簧推向与端口的关系。 中空的固定螺钉可调节地安装在柄中以改变阀球上的偏压力。 在一种形式中,为了手动植入,套筒可滑动地安装在柄上,具有中心孔径扩大的头部并且在头部附近具有植入放大的线。 头部具有可由手动插入工具接合的相对的径向凹槽。 在其他形式中,为了气动插入,柄部具有扩大的头部,用作气动插入管中的驱动活塞。 具有植入倒钩的垫圈构件可滑动地安装在柄上并且被布置成响应于气动驱动动作而被锁定到位于头部下方的柄部,其倒钩嵌入植入穿刺中的胎儿皮肤中,从而将柄保持在操作中 位置与入口端口暴露在颅骨库。