Intravenous catheter set

Details Intravenous catheter set Intravenous catheter set

1996-05-06

1997-04-08

Rimell, Sam

Surgery

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

Treating material introduced into or removed from body...

604161, A61M 500

Patent

active

056182724

ABSTRACT:
An intravenous catheter set includes a needle 1, having a proximal end 5 and a distal end 3 and a catheter 2, in which the needle 1 is detachably inserted in such a manner that the sharpened end 3 of the needle 1 extends from a front end of the catheter 2, which has a front end equal to or slightly smaller in outer diameter than the distal end 3 which forms a sharpened end, and which has its base end gradually reduced in diameter rearward to form a reduced-diameter portion 4 with a tapered surface 4a. Portion 4 is followed by the proximal end 5 which gradually increases in diameter rearwardly to form a tapered portion 5 corresponding in shape to a front end 7 of the catheter 2, to minimize the resistance of a blood vessel's wall against the catheter 2 in piercing the vessel's wall with the needle and to substantially prevent a front end of the catheter 23 from rolling back or tearing. The catheter tube is constructed of polyether-block amide in which polyamide-blocks and polyether-blocks are alternately arranged and linearly combined with each other.

REFERENCES:
patent: 3030953 (1962-04-01), Koehn
patent: 3082769 (1963-03-01), Palmer
patent: 3388703 (1968-06-01), Bowes
patent: 3612050 (1971-10-01), Sheridan
patent: 3788326 (1974-01-01), Jacobs
patent: 4147165 (1979-04-01), Tauschinski
patent: 4411655 (1983-10-01), Schreck
patent: 4645491 (1987-02-01), Evans
patent: 4964854 (1990-10-01), Luther
patent: 4995866 (1991-02-01), Amplatz et al.

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