Double lumen catheter

Details Double lumen catheter Double lumen catheter

1978-01-05

1980-05-13

Eickholt, E. H.

Surgery

Respiratory method or device

Ozone or ion generation

128221, 128349R, A61M 500, A61M 2500

Patent

active

042023327

ABSTRACT:
A double lumen catheter for use in haemodialysis, which comprises ducts for blood streams flowing into and respectively out of the body, an inner cannula providing an inner duct, an outer cannula surrounding the inner cannula and providing between the inner cannula and the outer cannula an outer duct, a front end of at least the inner cannula being inclined obliquely to the longitudinal cannula axis and sharply ground to facilitate puncture of a blood vessel, the front end of the inner cannula projecting beyond a front end of the outer cannula and the cross-section of the catheter changing progressively from the outer diameter of the inner cannula to the outer diameter of the outer cannula, the outer duct when in an operative state having at its front end an opening of cross-sectional area equal to the cross-sectional area of the outer duct, so that the total cross-section of the outer duct is available to a blood stream entering or leaving the outer duct.

REFERENCES:
patent: 3082769 (1963-03-01), Palmer
patent: 3388703 (1968-06-01), Bowes
patent: 3492992 (1970-02-01), Kurtz
patent: 3604426 (1971-09-01), Erickson
patent: 3610239 (1971-10-01), Huggins
patent: 3612050 (1971-10-01), Sheridan
patent: 3727613 (1973-04-01), Sorenson et al.
patent: 3863632 (1975-02-01), Schwartz
patent: 4037600 (1977-07-01), Poncy et al.
patent: 4054139 (1977-10-01), Crossly
patent: 4073297 (1978-02-01), Kopp

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