Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1987-08-26
1989-10-03
Jaworski, Francis
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 65, 604 93, 604131, 128Dig12, A61M 520
Patent
active
048713511
ABSTRACT:
An implantable medication delivery system comprising an implantable unit with a refillable reservoir, a catheter connected thereto, and a pumping mechanism activated by a microcomputer or microprocessor for pumping medication from the reservoir through the catheter into the body. The implantable medication unit receives information and control commands via a telemetry link from an external controller unit having a microprocessor. The external controller receives feedback in the form of intermittent sampling of blood using enzyme strips and a reflectance meter and/or additional sensor(s) which measure(s) physiological parameter(s) such as heart rate or blood pressure or temperature or skin resistivity. The feedback information is processed by the external unit in accordance with a mathematical model of the patient and the relevant parameters are transmitted to the implanted unit which adjusts its delivery profile according to a prescribed algorithm. The external unit can also detect an alarm condition and take appropriate steps, e.g. abort infusion.
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"Microcomputer Controlled Devices for Human Inplantation" by R. E. Fischell, Johns Hopkins APL Technical Digest vol. 4 #2, 1983, pp. 96-103.
Jaworski Francis
Shay D.
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