Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1989-12-15
1991-02-26
Pellegrino, Stephen C.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604166, A61M 500
Patent
active
049958666
ABSTRACT:
The present invention provides a combined needle and dilator comprising a needle having a head with an outer diameter greater than the outer diameter of the body of the needle and a dilating sheath carried about the needle and abutting the rearward needle portion of the needle head. The dilating sheath has a front portion with an outer diameter substantially equal to the outer diameter of the needle head to define, with the head, a generally smooth surface; a body portion with an outer diameter greater than that of the front portion; and a tapered portion disposed between the front and body portions. The tapered portion has an outer surface smoothly merging into the outer surfaces of the front portion and the body portion.
REFERENCES:
patent: 3082769 (1963-03-01), Palmer
patent: 3388703 (1968-06-01), Bowes
patent: 3454006 (1969-07-01), Langdon
patent: 3492992 (1970-02-01), Kurtz
patent: 3565074 (1971-02-01), Foti
patent: 3585986 (1971-06-01), Krug
patent: 3612050 (1971-10-01), Sheridan
patent: 4362156 (1982-12-01), Feller, Jr. et al.
patent: 4668221 (1987-05-01), Luther
Amplatz Kurt
Kotula Frank
Bauman Mary P.
Haller James R.
Kaihoi Gregory P.
Microvena Corporation
Pellegrino Stephen C.
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