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Steerable catheter

  • US 5,125,895 A
  • Filed: 12/19/1988
  • Issued: 06/30/1992
  • Est. Priority Date: 07/22/1986
  • Status: Expired due to Term
First Claim
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1. A steerable dilatation catheter means comprising:

  • a. a flexible catheter comprising a spring coil body defining a lumen, said spring coil body having proximal and distal ends, the distal end of said spring coil body being closed, and said spring coil body having a flexible body skin thereon;

    b. dilatation balloon means positioned adjacent to the distal end of said spring coil body, said spring coil being less tightly wound for a predetermined length at a point substantially adjacent to the distal end of said spring coil body and within the dilatation balloon means, the flexible body skin proximal to the dilatation balloon means being tight against said spring coil body, and the dilatation balloon means being inflated by fluid entering through the less tightly wound coils in said predetermined length;

    c. a deflection wire within the lumen having proximal and distal ends and being substantially co-extensive with said spring coil body, the distal end of said deflection wire being attached to the distal end of said spring coil body; and

    ,d. control means attached to the proximal end of said catheter, the proximal end of said deflection wire extending to the control means, the control means having engaging means which fixedly engages the proximal end of said deflection wire to cause said deflection wire to be displaced distally or proximally, said displacement causing the distal end of said catheter to bend out of or toward the line of its longitudinal axis, and the control means having rotation means to cause said deflection wire and said catheter to rotate together to cause the distal end of said catheter to rotate about its longitudinal axis.

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