초록 ▼

An integral fluid filter and capillary restrictor unit, or alternatively an integral fluid filter and multiple orifice restrictor unit, is resiliently positioned in a manifold body which is edge mounted to a flat cylindrical assembly which contains the medication reservoir and pressure stabilizing c

An integral fluid filter and capillary restrictor unit, or alternatively an integral fluid filter and multiple orifice restrictor unit, is resiliently positioned in a manifold body which is edge mounted to a flat cylindrical assembly which contains the medication reservoir and pressure stabilizing chamber to provide a completely self contained implantable unit which is thin, small and light weight and yet needs to be refilled only as often as the much larger stainless steel capillary tube devices with bellows type reservoirs now on the market.

대표청구항 ▼

An implantable medication infusion device, comprising a pair of circular concave members positioned in opposed relation with the outer edges thereof connected together, a flexible circular diaphragm positioned between said concave members and having the edge thereof sealed to said concave members th

An implantable medication infusion device, comprising a pair of circular concave members positioned in opposed relation with the outer edges thereof connected together, a flexible circular diaphragm positioned between said concave members and having the edge thereof sealed to said concave members thereby to form a pressure stabilizing chamber with one of said concave members on one side of said diaphragm and a medication reservoir with the other one of said concave members on the other side of said diaphragm, a two phase fluid in said pressure stabilizing chamber for maintaining a constant pressure on said diaphragm which is greater than the body pressure of the body in which said infusion device is implanted, body means secured to at least one of said concave members and having a recess therein, a penetrable septum mounted in said body means and communicating with said recess a passageway in said body means between said recess and said reservoir, whereby said reservoir can be filled through said septum, said recess and said passageway, and a capillary unit positioned in said body means and having an inlet connected to said reservoir and an outlet communicating with the exterior of said device, said capillary unit having a flow restrictive passageway between said inlet and outlet of sufficiently small cross section to limit the flow of medication from said reservoir in response to the pressure on said diaphragm to a desired rate.