Pedicled rectus abdominis muscle flap wrapped around the penis for enhanced urethral pressure: an experimental study in dogs.
OBJECTIVE
It was the aim of this study to investigate the possibility of pedicled rectus abdominis muscle fascial flap wrapped around the penis for enhanced urethral pressure in dogs.


METHODS
Ten adult male Beagle dogs underwent a procedure in which surrounding tissue of the penis at the site of the bulbomembranous urethra was dissected and a pedicled rectus abdominis muscle fascial flap was wrapped around the penis. Profilometry of the urethral pressure was carried out before, during and after the operation in all dogs.


RESULTS
Before the operation, the mean maximal urethral pressure (MUP) was 48.9 +/- 11 cm H(2)O, and the mean MUP was 78.3 +/- 20.5 cm H(2)O after the penis was surrounded by a rectus muscle flap. There was a significant difference (t = 4.99, p = 0.0007). Ten weeks after the operation, the mean MUP was 88.3 +/- 22.4 cm H(2)O, which was significantly higher than that before the operation (t = 6.0584, p = 0.0002).


CONCLUSIONS
A pedicled rectus abdominis muscle fascial flap wrapped around the penis can raise the urethral pressure. This provided an experiment basis for treating male urinary incontinence with a pedicled rectus muscle flap.
Sa
Ying-Long
YL
Department of Urology, Jiaotong University, Sixth People's Hospital of Shanghai, Shanghai, People's Republic of China.
Xu
Yue-Min
YM
Liu
Zhang-Shun
ZS
Feng
Chao
C
Fei
Xion-Fang
XF
D000818:Animals; D004195:Disease Models, Animal; D004285:Dogs; D005500:Follow-Up Studies; D008297:Male; D010413:Penis / Q000601:surgery*; D011312:Pressure; D017568:Rectus Abdominis / Q000637:transplantation*; D013524:Surgical Flaps; D016896:Treatment Outcome; D014521:Urethra / Q000503:physiopathology*; D014549:Urinary Incontinence / Q000503:physiopathology / Q000601:surgery*; D014563:Urodynamics / Q000502:physiology*