Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1982-06-04
1984-08-07
Pellegrino, Stephen C.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604264, 604280, A61M 500
Patent
active
044641761
ABSTRACT:
A catheter which is capable of delivering medicine into a blood vessel at a selected point, such as into a coronary artery, includes an outer tube which is joined to the outside diameter of an inner tube by drawing the tubes through a heated die. A distal portion of the outer tube extends beyond the distal end of the inner tube, and the outer tube is formed from a polymeric material having a substantially lower flexural modulus than the polymeric material of the inner tube so that the distal portion is relatively flexible for enabling insertion in a tortuous blood vessel. The inner diameters of the inner tube and the distal portion of the outer tube permit insertion of a guide wire therethrough for aiding in the insertion of the catheter.
REFERENCES:
patent: 2437542 (1948-03-01), Krippendorf
patent: 3605750 (1971-09-01), Sheridan
patent: 4044765 (1977-08-01), Kline
patent: 4239042 (1979-04-01), Asai
patent: 4318402 (1982-03-01), Vaillancourt
Ganz-Edwards, "Coronary Infusion Catheter", Aug. 12, 1981.
Mallinckrodt Inc.
Pellegrino Stephen C.
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