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Injection catheter and method

  • US 4,578,061 A
  • Filed: 07/31/1984
  • Issued: 03/25/1986
  • Est. Priority Date: 10/28/1980
  • Status: Expired due to Term
First Claim
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1. A catheter comprising:

  • an elongated hollow flexible tubular member adapted to be inserted into and moved along a body duct, such as an artery,an operating head attached to and terminating at one end of said flexible tubular member and having a side wall portion facing lateral to the longitudinal axis of said flexible tubular member,an elongated narrow passageway extending longitudinally and laterally through said operating head and terminating at one end at an opening in said side wall of said head,a hollow hypodermic needle having a dispensing front end with an opening therein, said needle being completely disposed and supported within said operating head and movable longitudinally through said passageway in said head from a retracted position therein whereby the dispensing end of said needle is below said opening in said side wall of said head to an extended position whereby said dispensing end of said needle projects laterally outwardly beyond the side wall of said head so as to permit said dispensing end of said needle to penetrate tissue against the side wall of said head,first means at the other end of said elongated hollow flexible tubular member for applying a force for urging movement of said needle through said passageway in said head from said retracted position therein to said extended position lateral of said head and for returning said needle from said extended to said retracted position within said head when said head is selectively located within a passageway of a living being,second means for introducing a liquid into said needle and ejecting said liquid through the opening in the dispensing end of said needle into tissue penetrated by the end of said needle.

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