Multiple-draw, variable suction syringe

Details Multiple-draw, variable suction syringe Multiple-draw, variable suction syringe

1998-07-01

2000-04-18

Hindenburg, Max

Surgery

Diagnostic testing

Liquid collection

604181, 604218, A61B 1000

Patent

active

060509570

ABSTRACT:
A multiple-draw syringe for extraction of a fluid into at least one fluid container comprising a cylindrical body having a distal end and an open proximal end, a hollow needle extending from the distal end, a piston sealably engaging and slidable along an interior wall of the cylindrical body, a ball check valve, a plunger for moving the piston proximally or distally within the cylindrical body, and a conduit extending through the piston to an enclosed fluid collection receptacle. The distal end includes a first chamber provided with a fluid inlet at one end and a fluid outlet at an opposite end. The first chamber has a conical sidewall adjacent the fluid inlet and a plurality of radially spaced stems adjacent the fluid outlet. The distal end is open to the flow of a fluid into the cylindrical body through the first chamber when the syringe is in use. The piston includes a piston face extending transversely across the interior wall and defines a fluid chamber between the piston face and the distal end of the cylindrical body. The ball check valve is positioned in the first chamber to permit flow of fluid through the first chamber in one direction only. The plunger is attached at one end to the piston and has another end extending beyond the open proximal end of the cylindrical body. The conduit has a sufficiently narrow, uniform internal diameter to induce the passage of a fluid from the fluid chamber through the conduit and into the enclosed fluid collection receptacle.

REFERENCES:
patent: 3557778 (1971-01-01), Hughes
patent: 3620418 (1971-11-01), Stevens et al.
patent: 3957052 (1976-05-01), Topham
patent: 4210173 (1980-07-01), Choksi et al.
patent: 4447235 (1984-05-01), Clarke
patent: 4732162 (1988-03-01), Martell
patent: 5147329 (1992-09-01), Brannon
patent: 5518005 (1996-05-01), Brannon

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