Pressure regulated implantable infusion pump
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United States of America Patent
Stats
-
Jan 12, 1988
Grant Date -
N/A
app pub date -
Feb 3, 1986
filing date -
Feb 3, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An implantable infusion pump (20) for infusing drugs or other chemical or solutions into the body. A movable diaphragm (26) forming a variable volume drug chamber (22). A fluid piston (32) opposing the force exerted by the diaphragm (26) on the drug solution in the drug chamber (22). The pressure of the fluid piston (32) being controlled by a regulator (33) providing a reference pressure and in fluid communication with the fluid piston (32). The regulator (33) reducing the fluid pressure of the piston fluid (32) as drug solution is expelled from the drug chamber (22) so as to maintain a constant pressure differential between the drug chamber (22) and an infusion site in the body. The implantable infusion pump (20) being readily adaptable to variable or electronic flow control.
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