Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1985-04-23
1986-01-21
Truluck, Dalton L.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604272, A61M 500
Patent
active
045655456
ABSTRACT:
Since a typical catheter insertion device is used for percutaneous insertion of a catheter into an artery or a vein located in a deep part of a tissue, it is necessary to secure a sufficient lumen for introducing the catheter while alleviating pain inflicted on the patient when the catheter insertion device punctures the artery or the vein. The catheter insertion device of the invention has a tapered portion formed in the vicinity of a beveled surface of an inner needle in order to realize both necessary functions. Accordingly, it is possible to decrease the size of the incision in the tissue because it is formed by the beveled surface of the tapered needle point with a smaller diameter, and the desired objects can be accomplished by means of an elastic insertion of the catheter into the smaller incision and, at the same time, bleeding from the incision can be minimized.
REFERENCES:
patent: 2830587 (1958-04-01), Everett
patent: 3094122 (1963-06-01), Gauthier et al.
patent: 3308822 (1967-03-01), DeLuca
patent: 3633580 (1972-01-01), Knox
patent: 3788320 (1974-01-01), Dye
patent: 4335718 (1982-06-01), Calabrese
Terumo Kabushiki Kaisha
Truluck Dalton L.
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