[Minimally invasive treatment of stress urinary incontinence by collagen administration. Comparison between endosonography controlled and transurethral submucous collagen injection].

For many years, injectable substances have been in use for the treatment of incontinence. We examined different methods of injecting glutaraldehyde cross-linked bovine collagen injection for their effectiveness in treatment of genuine stress incontinence. In the first group of patients collagen injection was done under endo-ultrasound guidance. In the second group an endoscopic system was used. There was no major difference in patient selection for the two groups. Incontinence symptoms became less severe in only 5 of 15 (33%) patients in the endo-ultrasound group, who then had moderate stress incontinence. Endoscopic collagen treatment resulted in social continence in 15 of the 22 (68.2%) patients. We conclude that endoscopic collagen is superior to endo-ultrasound-guided collagen injection in the treatment of incontinence.