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Laser therapy in dogs and humans--is there a difference?
H W Gottfried1, E Brändle, R Hefty
1Urological Clinic, University of Ulm, Germany.
British Journal of Urology
|March 1, 1997
Summary
Laser therapy reduced canine prostate volume by 50%, but only 21% in men with benign prostatic hyperplasia (BPH). Anatomical and tissue differences explain this discrepancy, limiting the canine model
Area of Science:
- Urology
- Veterinary Medicine
- Surgical Technology
Background:
- Benign prostatic hyperplasia (BPH) is a common condition in aging men.
- Laser therapy is a treatment option for BPH, but its efficacy can vary.
- Canine models are sometimes used to study BPH treatments.
Purpose of the Study:
- To quantitatively compare the effectiveness of transurethral laser ablation in reducing prostate volume in dogs and men with BPH.
- To assess the impact of anatomical and tissue differences on treatment outcomes.
Main Methods:
- Twelve mongrel dogs with BPH underwent transurethral laser treatment using an Nd:YAG laser.
- Forty human patients with symptomatic BPH were treated with the same laser system.
- Prostate volume reduction was measured using stereological methods in dogs and transrectal ultrasonography in humans.
Main Results:
- Canine prostates showed a mean volume reduction of 50% after laser treatment.
- Human prostates showed a significantly lower mean volume reduction of 21%.
- Differences in stromal and glandular tissue composition between species likely account for the varied outcomes.
Conclusions:
- The canine model provides only a rough estimate of laser therapy's effectiveness for BPH in humans.
- Significant anatomical and histological differences between canine and human prostates impact treatment results.
- Individual tissue variations in humans may also influence the response to laser treatment for BPH.