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  1. Argon plasma coagulation (APC) in gastroenterology : experimental and clinical experiences.

    Article - En anglais

    Background 

    Diathermy procedures are indispensable in interventional endoscopy.

    Argon beam coagulation is an innovative no-touch electrocoagulation technique in which highfrequency alternating current is delivered to the tissue through ionized argon gas.

    Methods and patients 

    Before clinical application, we conducted in-vitro studies to investigate the depth and diameter of tissue coagulation in fresh operative specimens from the stomach, small intestine and colon.

    Five different power/gas flow settings between 40 and 155W and 2 and 71/min were used.

    The impact time (1-10s) and the incident angle of the probe (45° and 90°) were also varied.

    The maximum depth of necrosis was 2.4 mm, the maximum diameter 1.1 cm.

    No perforation occurred even in critical areas such as the colon and duodenum.

    We therefore performed argon beam coagulation in 66 consecutive patients.

    Two power/gas flow settings of 40 and 70W and 2 and 31/min, respectively, were used.

    The impact time and incident angle were varied individually.

    Results 

    In 49 of the 50 patients with oozing haemorrhage from angiodysplastic lesions, polypectomy sites, erosions or ulcers or oozing of blood due to vascular penetration by tumours, definitive haemostasis was achieved in one to two sessions.

    In all 11 patients with residual sessile adenoma tissue, complete removal was possible.

    Oesophageal patency was restored in all five patients with stenosing tumours. (...)

    Mots-clés Pascal : Photocoagulation, Laser gaz, Argon, Endoscopie, Voie abord, Efficacité, Coût, Evaluation performance, Homme, Chirurgie, Appareil digestif pathologie, Oesophage pathologie, Estomac pathologie, Intestin pathologie, Economie santé

    Mots-clés Pascal anglais : Photocoagulation, Gas laser, Argon, Endoscopy, Surgical approach, Efficiency, Costs, Performance evaluation, Human, Surgery, Digestive diseases, Esophageal disease, Gastric disease, Intestinal disease, Health economy

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 97-0368947

    Code Inist : 002B25M. Création : 12/09/1997.