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Method for endoscopic blood flow detection by the use of ultrasonic energy

  • US 4,582,067 A
  • Filed: 02/14/1983
  • Issued: 04/15/1986
  • Est. Priority Date: 02/14/1983
  • Status: Expired due to Fees
First Claim
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1. A method for determining the location of the retroduodenal artery relative to the papilla of Vater during endoscopic papillotomy, said method comprising the steps of:

  • inserting a flexible, side-viewing endoscope into the duodenum;

    visualizing the papilla through the endoscope;

    passing a catheter including an ultrasonic probe having a transverse, sectorial, range-limited field through a biopsy channel of the endoscope, through the papilla, and into the common bile duct so that said ultrasonic field is directed towards the retroduodenal artery;

    advancing the catheter and monitoring a Doppler signal obtained from the probe until the Doppler signal is characteristic of arterial blood flow; and

    ,visualizing, through the endoscope, the amount by which the catheter has been advanced past the papilla.

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