Infuser with balloon for infusing medicine
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United States of America Patent
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-
May 18, 1993
Grant Date -
N/A
app pub date -
Dec 18, 1991
filing date -
Feb 28, 1990
priority date (Note) -
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status (Latency Note)
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Abstract
An infuser for continuously infusing a solution of medicine includes a tubular main body having a flow path which extends along the longitudinal axis of the body. An inlet portion having a check valve, an injection port, or a one-way cock is connected to one end of the body. A cylinder with a closed bottom is slidably connected to the other end of the body. The bottom of the cylinder is directed outwardly. The cylinder or the other end of the body is provided with a plurality of holes. A change-over valve is provided in the flow path at an intermediate portion of the body. An outlet portion is connected to the change-over valve. A control portion for controlling the outflow of the solution of medicine is provided in the outlet portion. A balloon made from an elastic material surrounds the holes. One circumferential portion of the balloon is air-tightly secured to the outer periphery of the cylinder at a given position and another circumferential portion of the balloon is air-tightly secured to the outer periphery of the cylinder at a given position. In use, a given amount of the solution of medicine is infused into the balloon through the inlet portion. The solution of medicine in the balloon flows out continuously for a long time through the outlet control portion and an indwelling retainer attached to the outlet portion.
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