Aspirating syringe having a plunger guide for a reciprocating pl

Details Aspirating syringe having a plunger guide for a reciprocating pl Aspirating syringe having a plunger guide for a reciprocating pl

1995-09-28

1996-12-10

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604218, 604227, A61M 500

Patent

active

055825958

ABSTRACT:
Disclosed is an aspirating syringe having a hollow barrel and a piston assembly that is adapted to move reciprocally through the barrel, whereby the barrel is first infused with a fluid medication from a standard pharmaceutical vial during an infusion step so that the medication can then be expulsed to a target tissue site during an injection step. A pair of elongated plunger guides extend axially and proximally from the barrel in parallel alignment with each other. Each of the plunger guides has a longitudinal track groove to receive a respective guide tab carried by and movable with the piston assembly. The guide tabs ride through the track grooves of the plunger guides to stabilize the reciprocal movement of the piston assembly and thereby permit the barrel to be infused with a precise volume of fluid medication. The piston assembly includes a finger grip by which the syringe may be advantageously and accurately manipulated by a health care worker using only a single hand to complete both the aspiration and injection steps.

REFERENCES:
patent: 2863452 (1958-12-01), Ogle, Sr.
patent: 3990446 (1976-11-01), Taylor
patent: 4484915 (1984-11-01), Tartaglia
patent: 4518387 (1985-05-01), Murphy et al.
patent: 4639248 (1987-01-01), Schweblin
patent: 5135511 (1992-08-01), Houghton et al.

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