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Improved optical catheter and method for making same

  • US 4,416,285 A
  • Filed: 08/13/1981
  • Issued: 11/22/1983
  • Est. Priority Date: 11/29/1978
  • Status: Expired due to Fees
First Claim
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1. A population of catheters suitable for use during photometric analysis of a fluid, each member of said population of catheters having a single transmitting optical fiber having proximal and distal ends with aperture means respectively formed therein for conducting radiant energy therethrough, each member of said population of catheters also having a single receiving optical fiber having proximal and distal ends with aperture means respectively formed therein for conducting radiant energy therethrough, at least some of said transmitting and receiving fibers within said population of catheters differing sufficiently in a cross-sectional dimension from one another such that calibration of individual members of said population of catheters would otherwise be necessary to carry out accurate photometric analysis of the fluid even if said transmitting and receiving optical fibers of said members were used in parallel and tangent configuration at said distal ends, said aperture means being located at said distal ends of said transmitting and receiving optical fibers in each member of said population of catheters so that said fibers respectively have centroids of area spaced from one another at a fixed distance which is identical for all members of said population of catheters such that the need for individual calibration of each member of said population of catheters is eliminated despite differences in the dimensions of said transmitting and receiving optical fibers.

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