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Balloon guide

  • US 4,848,344 A
  • Filed: 11/13/1987
  • Issued: 07/18/1989
  • Est. Priority Date: 11/13/1987
  • Status: Expired due to Term
First Claim
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1. A balloon guide which comprises:

  • a guide body comprising a coiled wire forming a cylindrical body having a central lumen open at the proximal and distal ends, said coiled wire including a first, proximal portion in which the coils are secured together with one another, and a second, distal portion in which the coils are normally adjacent one another but are separable from one another,said guide body including a plug seat located within the central lumen distal of the second portion of the coiled wire, the plug seat defining a passageway communicating with the central lumen, the plug seat being configured to provide a closing off of the central lumen upon closing off of the plug seat,said guide body further including a balloon attached to the coiled wire, the balloon being positioned over and in fluid communication with the second portion of the coiled wire to enable fluid passing from within the central lumen and through the separated coils of the second portion to enter into and inflate the balloon;

    a plug mandril comprising an elongated mandril having proximal and distal ends, said plug mandril further including a plug secured to the distal end of the mandril, the mandril and plug being sized to be receivable within the central lumen of said guide body and extendable therethrough, the plug defining a seating portion sized and configured to be received against the plug seat of said guide body and to close off the plug seat when received thereagainst;

    extension means for extending said plug mandril into and through the central lumen of said guide body between first and second positions, the first position locating the plug of the mandril spaced from the plug seat of said guide body to permit fluid communication through the plug seat, the second position locating the plug in sealing position against the plug seat and preventing fluid communication therethrough, said extension means extending said plug mandril in the second position through the central lumen a sufficient distance to cause separation of the normally adjacent coils in the second portion of the coiled wire; and

    inflation means communicating with the central lumen of said guide body for introducing a fluid into the central lumen and through the separated coils of the second portion of the coiled wire for inflating the balloon when said plug mandril is in the second position within the guide body.

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