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Coil spring guide with deflectable tip

  • US 4,456,017 A
  • Filed: 11/22/1982
  • Issued: 06/26/1984
  • Est. Priority Date: 11/22/1982
  • Status: Expired due to Term
First Claim
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1. A coil spring guide for use in connection with the insertion of a catheter into the vessel of a body, said guide comprising a coil spring, a core wire within said coil spring extending the length of said coil spring, a head member, means for coupling said head member to the distal end of said core wire, the coils in the distal end portion of said coil spring being spaced from each other and the distal end of said coil spring engaging the backside of said head member, means coupled to the proximal end of said coil spring and of said core wire for causing movement of said core wire relative to said coil spring, a sheath of smooth plastic material completely surrounding said coil spring and having a closed distal end completely covering said head member, said coupling means including a distal, reduced-in-cross-section core wire portion fixed to and extending from said core wire to said back side of said head member and fixed to said back side of said head member at and adjacent to a lateral side thereof whereby rearward movement of said core wire causes compression of said distal end portion of said coil spring and lateral movement thereof to one side of said center line of said coil spring and in a direction outwardly from the lateral side of said head member to which said distal core wire portion is fixed.

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