Healing of Bladder Wall after Contact and Non-Contact IMd-YAG Laser Photocoagulation

Autor:	J. O. Salo, Tom Schröder, A. Lehtola, Sakari Rannikko, Hannu Savolainen, Stig Nordling, Kimmo Taari
Rok vydání:	1992
Předmět:	Pathology medicine.medical_specialty Urinary bladder Necrosis Tissue ablation business.industry Urology Perforation (oil well) Lesion medicine.anatomical_structure Nd:YAG laser photocoagulation Medicine Power setting medicine.symptom business Contact laser
Zdroj:	European Urology. 21:64-69
ISSN:	1873-7560 0302-2838
DOI:	10.1159/000474803
Popis:	The healing process of the bladder wall after contact and non-contact Nd-YAG laser irradiation was studied in 18 piglets. The animals were sacrificed 1 h, and 2, 5 and 14 days after photocoagulation. The lesions were examined histologically by light and scanning electron microscopy. Immunohistochemical stains were prepared for visualization of lactate dehydrogenase. Perforation of the bladder wall was found in 2 cases where a contact probe was used (15 W/2 s). A crater in the bladder wall resulting from tissue ablation was seen in all cases immediately after contact laser irradiation. Photocoagulation using a non-contact laser led to white necrosis in the bladder wall. Minimal tissue ablation was evident at the highest power setting used (35 W/2 s). After 2 days inflammation around the lesion was marked. Inflammation with fibroblasts invading the damaged area was seen 5 days after photocoagulation. Fourteen days after photocoagulation minor scar formation was evident beneath the histologically normal epithelium. It is concluded that lesions caused by contact or non-contact Nd-YAG laser photocoagulation will heal within 2 weeks with minor scar formation.
Databáze:	OpenAIRE
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