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Method and apparatus for fiber-optic cardiovascular endoscopy

  • US 4,175,545 A
  • Filed: 08/08/1977
  • Issued: 11/27/1979
  • Est. Priority Date: 03/10/1977
  • Status: Expired due to Term
First Claim
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1. In an improved fiber-optic catheter for use in cardiovascular endoscopy of the type including:

  • a flexible sheath defining a longitudinally extending lumen, said sheath having a proximal end and a distal end;

    an afferent fiber-optic bundle disposed in said sheath for transmitting light from the proximal end of said catheter to the distal end thereof; and

    an efferent fiber-optic bundle disposed in said sheath for returning light from said distal end to said proximal end, the improvement comprising;

    said sheath having an aperture extending therethrough from said lumen, said aperture being located proximally of said sheath distal end;

    a tubular member comprising a longitudinally extending peripherally continuous wall defining a channel, said tubular member being slidably disposed within said lumen of said sheath, the distal portion of said tubular member having a distal end face and an aperture extending through said wall from said channel, said tubular member being longitudinally slidably movable in said lumen between a first position wherein said tubular member aperture communicates with said sheath aperture and a second position wherein said tubular member aperture is out of communication with said sheath aperture; and

    means for indicating when said tubular member is in said first position.

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