Long indwelling double bore catheter

Details Long indwelling double bore catheter Long indwelling double bore catheter

1984-12-07

1986-07-22

Rosenbaum, C. Fred

Surgery

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

Material introduced into and removed from body through...

604269, A61M 300

Patent

active

046016970

ABSTRACT:
A long indwelling double bore catheter for dilution and sampling of blood on a continuing basis capable of being used for long periods of time. The long indwelling double bore catheter has a small mixing chamber with an opening of a cross-sectional area equal to or less than the combined cross-sectional areas of the double bores, said opening communicating with the body fluid, e.g., blood, to be sampled, and wherein the distance of the mixing chamber from the distal end of the double bores to the end of the catheter is equal to or greater than 2 millimeters. Preferably, the volume of the mixing chamber is between about 3 and about 9.times.10.sup.-5 cubic inches. Preferably, the opening which communicates with the body fluid is a noncircular elongated opening which is equal to or less than twice the combined cross-sectional areas of the double bores.

REFERENCES:
patent: 2286462 (1942-06-01), Chaffin
patent: 3512517 (1970-05-01), Kadish et al.
patent: 3610226 (1971-10-01), Albisser
patent: 3916892 (1975-11-01), Latham, Jr.
patent: 4069814 (1978-01-01), Clemens
patent: 4280496 (1981-07-01), Van Baelen
patent: 4318402 (1982-03-01), Vaillancourt
patent: 4405313 (1983-09-01), Sisley et al.
Gander et al., "An All-Plastic Double-Lumen Catheter for Continuous Blood Sampling", Medical Instrumentation, vol. 9, No. 4, Jul.-Aug. 1975.

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