Transurethral balloon laser prostatectomy in the canine: medium-term, follow-up results.
OBJECTIVE
To demonstrate surgical complications in transurethral balloon laser prostatectomy by medium-term, follow-up observation.


METHODS
Three dogs were treated with transurethral laser irradiation using 15 watts for 20 minutes at 60 degrees C at a 5 mm depth of the prostate, one dog was for 5 minutes with same parameters, and one dog was with only laser balloon probe as a control. All animals were followed for 24 weeks.


RESULTS
A large cavity in the prostatic urethra was formed in laser-treated animals 4 weeks later, whereas the cavity in the balloon-treated animals was not shown. Cavity volume did not significantly change for 6 months, and there was no bladder neck stricture or urethral stenosis observed in any case. An increase in collagen fibers in the periurethral tissue was barely observed by Mallory staining.


CONCLUSIONS
The risk of bladder neck stricture and urethral stenosis was estimated to be low for transurethral balloon laser prostatectomy.
Suzuki
T
T
Department of Urology, Gunma University School of Medicine, Japan.
Kurokawa
K
K
Suzuki
K
K
Yamanaka
H
H
D000538:Aluminum Silicates; D000818:Animals; D002404:Catheterization / Q000009:adverse effects; D003094:Collagen; D004396:Coloring Agents; D004285:Dogs; D005500:Follow-Up Studies; D053685:Laser Therapy / Q000009:adverse effects; D008297:Male; D009354:Neodymium; D011467:Prostate / Q000000981:diagnostic imaging; D011468:Prostatectomy / Q000009:adverse effects; D011859:Radiography; D014463:Ultrasonography; D014521:Urethra / Q000000981:diagnostic imaging / Q000473:pathology; D014525:Urethral Stricture / Q000209:etiology; D001743:Urinary Bladder / Q000000981:diagnostic imaging / Q000473:pathology; D001748:Urinary Bladder Neck Obstruction / Q000209:etiology; D015019:Yttrium
D000538:Aluminum Silicates; D004396:Coloring Agents; D009354:Neodymium; D015019:Yttrium; D003094:Collagen