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Yttrium aluminum garnet laser photocoagulation and monopolar electrocoagulation a comparative randomized study of hemostatic effects on experimental bleeding ulcer in dog



Yttrium aluminum garnet laser photocoagulation and monopolar electrocoagulation a comparative randomized study of hemostatic effects on experimental bleeding ulcer in dog



Gastroenterologie Clinique et Biologique 9(3): 212-219



This randomized study compared the effects of 2 methods of hemostasis.sbd.photocoagulation using YAG [yttrium-aluminum garnet] Neodyme laster and liquid monopolar electrocoagulation.sbd.on acute experimental bleeding ulcers in the dog stomach. One hundred and fifty-three lesions were made and randomized into 3 groups; 51 lesions were treated with photocoagulation and complete hemostasis was achieved in all cases. Hemostasis was obtained in 80% of 51 ulcers treated with liquid electrocoagulation. Control untreated ulcers remained hemorrhagic after 45 min of observation. The mean muscle injury on day 7 was 55% after photocoagulation and 65% after liquid electrocoagulation. On day 14, mean external injury was 60% after photocoagulation and 75% after liquid electrocoagulation (non-significant difference). On day 7, the mean re-epithelization index, expressed as percentage of orginal ulcer diameter, ranged from 8 to 10% in each trial group. On day 14, reepithelization covered 78% of control ulcers and 72% of photocoagulated ulcers (NS). This percentage falls to 47% in ulcers treated with liquid electrocoagulation (P < 0.01 when compared with ulcers treated with photocoagulation). Photocoagulation seemed to be more efficient in ensuring hemostasis and external muscle injury was correlated with the energy delivered. External muscle injury could not be controlled by liquid electrocoagulation. However the difference in the percentages of mean external muscle injury between the two methods was not significant. Therefore, in man, the risk of perforation is probably slight and comparable for the 2 methods of hemostasis considered.

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Accession: 006925427

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