Syringe with double plunger

Details Syringe with double plunger Syringe with double plunger

1991-10-16

1993-02-23

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604220, 606200, A61M 5315

Patent

active

051886162

ABSTRACT:
A single-syringe device capable of inserting its contents, such as a blood filter, into the body of a patient in either of two opposite directions exclusively chosen by an operator in a fail-safe manner. First and second plungers slide in opposite directions within the syringe, which is connected to a catheter or similar, to transfer the contents into the patient's body. The device is constructed so that only one plunger can be employed at a time. Each plunger and the end of the syringe it cooperates with is coded, by color or otherwise. Such a construction and coding insure fail-safe operation when the syringe's contents must be inserted in only one direction. For example, a blood filter that traps emboli must have the same orientation whether it be inserted in one direction from the patient's jugular vein or in the opposite direction from the patient's femoral vein.

REFERENCES:
patent: 3885562 (1975-05-01), Lampkin
patent: 4256132 (1981-03-01), Gunter
patent: 4317446 (1982-03-01), Ambrosio et al.
patent: 4334536 (1982-06-01), Pfleger
patent: 4735616 (1988-04-01), Eibl et al.
patent: 4915695 (1990-04-01), Koobs
patent: 4943297 (1990-07-01), Saveliev et al.

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