[The relationship of tension and blood flow of the expanded pedicled fasciocutaneous flap in pig].
OBJECTIVE
To evaluate the effect of wound closure tension on the blood flow of the expanded pedicled fasciocutaneous flap, so as to find the best tension for the blood supply of the flap.


METHODS
8 piglets, aged 9-12 months, were used. On each side of pig back, a cephalic based expanded fasciocutaneous flap was designed. The size of the flaps was 5 cm x 20 cm. In the control group, the flaps were not elevated (0 g tension). In the experimental group, the flaps were treated at the end with the tension of 100, 200, 300, 400, 500, 600, 700, 800, and 900 g after elevation. The blood oxygen saturation (StO2) of the flaps was measured under different wound closure tension.


RESULTS
The flap StO2 raised along the increase of tension until the tension reached 200-300 g. Then the flap StO2 decreased when the tension continued to increase above 200-300 g.


CONCLUSIONS
The tension of 200-300 g is good for the blood flow of expanded pedicled fasciocutaneous flap. So the flap flexibility can be best used and the complication can be avoided.
Department of Plastic Surgery and Laser Medcine, Bejing Anzhen Hospital, Capital University of Medical Sciences, Beijing 100029, China.
Zhi-Hong
ZH
Zhang
Zhong-Shi
ZS
Ouyang
Hai-Bo
HB
Wang
Jia-Qi
JQ
Wang
D000818:Animals; D013524:Surgical Flaps / Q000098:blood supply*; D034421:Sus scrofa; D013552:Swine; D013718:Tensile Strength