Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1982-05-03
1984-03-27
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604191, A61M 500
Patent
active
044391846
ABSTRACT:
A syringe for delivering two separated bodies of fluid comprising: a first piston for separating the two bodies of fluid; a second piston for pushing the two bodies of fluid out of the syringe; and a fluid chamber having a no-pass zone in which the pistons can slide and which has a cross section that each of the pistons substantially fills, preventing the passing of fluid around the pistons when they are in the no-pass zone, an output zone to direct fluid pushed out of the syringe by the pistons, and a bypass zone, for receiving the first piston, which connects the no-pass and output zones and which has a cross section that the first piston is unable to fill, so that when the first piston enters the bypass zone the fluid between the first and second pistons can pass around the first piston to the output zone. In a preferred embodiment the bypass zone has ridges projecting in from its wall, which push portions of the first piston away from that wall, allowing fluid to flow around the first piston; the output portion forms a nozzle designed to fit into, and make a seal with, a urethra; and the two bodies of fluid are a lubricating antiseptic and a lubricating anesthetic for use in preparing a patient for catheterization.
REFERENCES:
patent: 2591046 (1952-04-01), Brown
patent: 3881484 (1975-05-01), Gidcumb, Jr.
patent: 3985122 (1976-10-01), Topham
patent: 4067333 (1978-01-01), Reinhardt et al.
patent: 4188949 (1980-02-01), Antoshkiw
patent: 4235235 (1980-11-01), Bekkering
Bronstein Sewall P.
Concord Laboratories, Inc.
Neuner George W.
Yasko John D.
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