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Method and apparatus for measurement of luminal dimensions

  • US 5,381,786 A
  • Filed: 02/11/1993
  • Issued: 01/17/1995
  • Est. Priority Date: 02/11/1993
  • Status: Expired due to Fees
First Claim
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1. A method for measuring dimensions of a lumen utilizing a fiberscope having a distal end positioned within the lumen during fiberoscopy, the fiberscope also having means for delivering electromagnetic energy so as to irradiate an interior luminal surface, which means extends beyond the distal end of the fiberscope, the method comprising the steps of:

  • emitting a radially propagating ring of electromagnetic radiation without substantial axial propagation from the means for delivering electromagnetic energy at a known distance from the distal end of the fiberscope, the ring of electromagnetic radiation impinging upon a discrete interior surface of the lumen so as to form a ring of reflected electromagnetic radiation;

    visualizing the ring of reflected electromagnetic radiation;

    measuring a dimension of the ring of reflected electromagnetic radiation; and

    applying a magnification factor to the measured dimension so as to determine an actual luminal dimension, the magnification factor being derived from said known distance from the distal end of the fiberscope.

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