Controlling plunger drives for fluid injections in animals

Details Controlling plunger drives for fluid injections in animals Controlling plunger drives for fluid injections in animals

1995-06-26

1997-09-02

Manahan, Todd E.

Surgery

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

Treating material introduced into or removed from body...

604151, 417 15, 417 63, A61M 3700

Patent

active

056626126

ABSTRACT:
A computer-controlled injector of the type as a motor which advances and retracts a plunger located within a syringe housing toward and away from a nozzle located in the front of the syringe to inject fluid into or out of an animal subject. The injector tracks the plunger position during an injection, and compensates for plunger extenders found in partially pre-filled syringes by applying a stored offset value to the computed plunger position, to produce a corrected plunger position reflecting the actual position of the plunger and compensating for the presence of the extender. The offset value can be determined by querying the operator as to the capacity of the syringe and determining therefrom the appropriate offset value, or may be automatically computed by detecting physical indicia on the syringe or extender which indicate the length of the extender.

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