Apparatus for electrically determining injection doses in syring

Details Apparatus for electrically determining injection doses in syring Apparatus for electrically determining injection doses in syring

1994-07-22

1996-10-29

Green, Randall L.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604208, 604218, 123DIG1, A61M 500

Patent

active

055692125

ABSTRACT:
An apparatus for electrically determining and recording the dose of an agent delivered with a syringe consisting of a barrel for holding the agent and a plunger for expelling the agent. The syringe has a conducting path with an input terminal and an output terminal, and at least one electrically resistive element, whose resistance changes depending on the position of the plunger inside the barrel. The apparatus produces a voltage difference across the terminals and causes an electric current to flow through the conducting path. An electric response measuring device, preferably an ammeter, measures the electric current delivered from the syringe's output terminal and calculates the dose therefrom. The result is recorded by a digital memory unit.

REFERENCES:
patent: 4950246 (1990-08-01), Muller
patent: 5176502 (1993-01-01), Sanderson et al.

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