[Anatomic research and clinical application of modified penile elongation: a report of 205 cases].

OBJECTIVE: To investigate the application of penile cavernous bodies elongation combined with fat flap for the treatment of micro-penis. METHODS: Anatomic study was performed to study the thickness of penile suspension ligaments and the relationship between the penile erection stability and the mobilization of cavernous bodies crus. The suspension ligaments were divided and cavernous bodies crus were partially mobilized, so as to release part of the cavernous bodies from inferior ramus of pubis. Then the penis was elongated sufficiently. Local fat flap was transposed to fill the front space of pubis to make sure the effective elongation of penis. RESULTS: 205 cases of micro-penis were treated. The average length of the penis was 4.26 cm in the static state, 8.13 cm in erectile state before operation. After operation, it increased to 8.63 cm in the static state, 12.11 cm in erectile state. CONCLUSIONS: The cavernous bodies can be elongated 1-2 cm more with the modified method, while the stability of penile erection is not affected.

[The relationship between the changes in the blood flow of the exceedingly expanded skin and the viability of the flap].

OBJECTIVE: To investigate the relationship between the blood flow of the exceedingly expanded skin and the viability of the flap. METHODS: The piglets were set up as the animal model. They were divided into 7 groups according to different injection volume of the tissue expander, i. e. injection to 1/2 content, 3/4 content, full content, 50% over content, 100% over content, sham-operation control and normal control. At different stages of expansion, the blood flow and the amplitude of the expanded skin were examined by laser Doppler. The survival length of the expanded flap was measured. Furthermore, statistical analysis was performed. RESULTS: As the expansion volume increasing, the blood flow and the amplitude of the expanded skin increased, the survival length of the expanded flap increased also. In the meantime, the amplitude instability and vessel permeability increased. When the injection volume exceeded to 100%, the blood flow and the survival length of the expanded flap decreased. CONCLUSIONS: In soft tissue and skin expansion, increasing injection volume could increase the survival length of the expanded flap, while over-expansion to 100% content may cause blood flow disturbance.