[Application of a free flap from urinary bladder mucosa for urethroplasty in experiment]. / Ispol'zovanie svobodnogo loskuta mochevogo puzyria dlia plastiki uretry v experimente.

Experiments on 8 rabbits have demonstrated that mucosa of the urinary bladder freely transplanted into the subcutaneous fat or under the muscular fascia is engrafted with unaffected normal histological structure and revascularized with vessels invading from the adjacent tissues. Urethroplasty with a vesical mucosa graft was made in 10 dogs with experimental urethral stricture (4 animals), urethral fistula (5 animals) or a combination of urethral stricture and fistula (1 animal). A positive result with reestablishment of normal urethral passability and elimination of urinary fistula was achieved in 9 animals (followup for 1 year). One dog died of an unknown cause. Urodynamic examination of the dogs in long-term follow-up reported normal urethral resistance to urinary flow.

[Plastic surgical repair of the urethra with vascular fasciocutaneous and combined flap (experimental study)]. / Plastika uretry vaskuliarizirovannym kozhno-fastsial'nym i kombinirovannym loskutom (éksperimental'noe issledovanie).

The experiments on 15 dogs with preformed urethral stricture or urinary urethral fistula have demonstrated that microsurgical transplantation of the vascular fasciocutaneous pedicle flap provides good functional long-term results. The best effect was achieved in cases of intraflap inclusion of previously transplanted mucosa of the urinary bladder. In all 7 experiments x-ray picture was similar to normal. Recurrent strictures or urethral fistulas were not registered. Urodynamic indices late after the experiment did not differ significantly from normal values.