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Tissue Coagulation in Laser Hemorrhoidoplasty - An Experimental Study.
Donatas Danys1, Julius Pacevicius1, Gabija Makunaite1
1Vilnius University Hospital Santaros klinikos, Santariskiu 2, LT-08661, Vilnius, Lithuania.
Open Medicine (Warsaw, Poland)
|March 20, 2020
Summary
Laser hemorrhoidoplasty (LHP) uses a 1470nm diode laser to treat hemorrhoids. A 3-second pulse at 8W creates a 4mm coagulation zone, guiding optimal spacing for effective treatment.
Area of Science:
- Proctology
- Minimally Invasive Surgery
- Laser Medicine
Background:
- Laser hemorrhoidoplasty (LHP) is an emerging hemorrhoid treatment.
- The precise depth of laser coagulation is currently unknown.
- Limited experimental data exists on LHP's coagulation effects.
Purpose of the Study:
- To determine the coagulation defect length from 1470nm diode laser power and activation time.
- To provide data for optimizing LHP procedures on perianal tissue models.
Main Methods:
- Utilized 54 fresh porcine anorectal tissue samples.
- Applied 1470nm diode laser at 6, 8, and 10W with 1, 2, or 3-second pulses.
- Analyzed tissue injury length using microscopy after laser application.
Main Results:
- The longest tissue injury (mean 3.93 mm) resulted from the maximum 3-second laser exposure.
- Laser power (6, 8, 10W) did not significantly affect injury length.
- Coagulation depth was primarily dependent on application duration.
Conclusions:
- An 8W, 3-second application of the 1470nm diode laser creates a ~4mm coagulation area.
- Subsequent laser applications should be initiated approximately 5mm from the initial site.
- This provides crucial data for refining LHP technique and improving patient outcomes.
