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Endoscopic pulsed-dye laser lithotripsy: 159 consecutive cases

M Grasso1, D H Bagley

  • 1Department of Urology, Loma Linda University Medical Center, CA.

Journal of Endourology
|February 1, 1994
PubMed
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The coumarin-based pulsed-dye laser effectively fragments urinary and biliary calculi, enabling minimally invasive endoscopic procedures. This laser lithotrite demonstrated high efficacy and safety in treating various stone types.

Area of Science:

  • Urology
  • Gastroenterology
  • Laser Medicine

Background:

  • Endoscopic treatment of urinary and biliary calculi has advanced with laser technology.
  • Pulsed-dye lasers offer potential for precise stone fragmentation.

Purpose of the Study:

  • To evaluate the safety and efficacy of coumarin-based pulsed-dye laser lithotripsy for various calculi.
  • To assess the laser's utility in conjunction with different endoscopic approaches.

Main Methods:

  • 159 consecutive patients with 176 calculi (renal, ureteral, bladder, urethral, biliary) were treated.
  • Pulsed-dye laser lithotripsy was performed using antegrade or retrograde endoscopic techniques.
  • Laser parameters included 200-550 micron fibers and 60-200 mJ energy.

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Main Results:

  • Successful fragmentation was achieved in 97.5% of calculi (172 out of 176).
  • The laser was used adjunctively for staghorn calculi, bladder stones, and biliary tree lithotripsy.
  • No complications were directly attributed to laser energy use.

Conclusions:

  • The coumarin-based pulsed-dye laser is a safe and effective endoscopic lithotrite for urinary and biliary calculi.
  • Its application allows for the use of smaller endoscopic instruments and channels.
  • The laser facilitates minimally invasive treatment options for a range of stone burdens.