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Ultrasonically marked cardiac catheters

  • US 4,697,595 A
  • Filed: 01/31/1985
  • Issued: 10/06/1987
  • Est. Priority Date: 07/24/1984
  • Status: Expired due to Term
First Claim
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1. A catheter comprising a substantially cylindrical wall and a hollow lumen, said wall having an inner surface and an outer surface, said wall being made of an ultrasonically transparent and electrically insulating material, said wall including a substantially tubular ultrasonic receiver means disposed therein, said receiver means spaced from said inner surface and said outer surface of said wall, said receiver means including electrical connector means extending longitudinally within said wall, said receiver means including at least a first and second ultrasonic receiver, said receivers being disposed in said wall at longitudinally spaced positions.

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