Syringe device for simultaneous infusion and withdrawal

Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...

Reexamination Certificate

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Reexamination Certificate

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07094222

ABSTRACT:
A syringe device includes a first chamber defined by a cylindrical barrel, a plunger head within the barrel and a hollow needle sealed to an administering end of the barrel but open to an environment outside of the first chamber. A second chamber is defined by the barrel, the plunger head and a seal that seals around a plunger shaft leading to the plunger head and that seals an actuation end of the barrel. A receiving container having a second hollow needle attached and sealed at one end is also attached and sealed to the syringe, to thereby define a receiving chamber in fluid communication with the second chamber of the syringe and, via the second needle, with an environment outside of the receiving chamber. Depressing the plunger will infuse a substance through the first needle while simultaneously withdrawing a substance through the second needle. Reverse action is possible.

REFERENCES:
patent: 4150669 (1979-04-01), Latorre
patent: 4578064 (1986-03-01), Sarnoff et al.
patent: 5389076 (1995-02-01), Shaw
patent: 6065371 (2000-05-01), Yacowitz
patent: 6245046 (2001-06-01), Sibbitt
patent: 6332875 (2001-12-01), Inkpen

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