Surgery – Diagnostic testing – Liquid collection
Patent
1997-09-26
1999-10-05
Hindenburg, Max
Surgery
Diagnostic testing
Liquid collection
600578, A61B 500
Patent
active
059614722
ABSTRACT:
A one-handed blood sampling reservoir for an infusion line having a configuration which allows discard fluid to be drawn into the reservoir and then returned to the patient in two squeezing motions. Both drawing and returning steps are performed by squeezing two of a plurality of finger grips provided on the reservoir. The reservoir may include a bracket which enables one-handed operation in either a hand-held or a pole-mounted configurations. In the alternative, the reservoir and finger grips may be formed by telescoped inner and outer housings without a bracket. The reservoir desirably includes a syringe-like body forming a chamber and a plunger/piston assembly reciprocal therein to vary the volume of the chamber. A narrow gap is provided in the chamber open to both inlet and outlet ports when the piston is fully seated to ensure a consistent and minimum flush volume in the chamber. The piston may be spring-loaded against the syringe body to simplify manufacturing by reducing the number of close tolerance parts required. The reservoir is preferably placed within an infusion line having a pressure transducer therein, and the spring loaded piston may be adjustable to vary the dynamic response of the fluid pressure system.
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Couchman W. Scott
Evans David J.
Morris Wesley M.
Swendson David L.
Baxter International Inc.
Cumberbatch Guy L.
Hindenburg Max
Marmor II Charles
Vinitskaya Lena I.
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