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Apparatus and method for percutaneous catheterization

  • US 4,411,655 A
  • Filed: 11/30/1981
  • Issued: 10/25/1983
  • Est. Priority Date: 11/30/1981
  • Status: Expired due to Fees
First Claim
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1. A device for introducing a large bore diagnostic or therapeutic catheter into a body compartment or vessel, comprising a thin wall cannula of shape memory alloy having an inner diameter fashioned to embrace the shank of a hypodermic needle, said cannula exhibiting, in its martensitic phase, an outer diameter convenient for percutaneous puncture of a body compartment or vessel and exhibiting, in its austentitic beta-phase, an inner diameter to slidably accomodate the outer diameter of said large bore diagnostic or therapeutic catheter, and a dilatable elastomeric cylindrical sheath deployed over the surface of said cannula.

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