Influence of closed irrigation drainage of HACC on ischemia/reperfusion injury of graft flap in rats / 中华医学美学美容杂志

ABSTRACT

Objective:To investigate the effects of quaternary ammonium salt of chitosan combined with closed irrigation on ischemia-reperfusion injury (I/R) in rat skin flap.Methods:Fourty-five adult male SD rats were randomly divided into 3 groups sham-operated group, I/R group and chitosan group. Before operation, collection of arterial blood for testing PCT and hs-CRP were used as basic values. Right low abdominal island flap fed by the superficial epigastric artery was created in rats of all three groups. After operation, we flushed and dressed the wound with 10% saline of sham-operated group and I/R group. Quaternary ammonium salt of chitosan combined with closed irrigation were used in chitosan group. Flaps were assessed histologically at 3 d, 5 d and 7 d of reperfusion. The tissue was collected to make the SOD, MDA and PCT, hs-CRP testing, pathological section observation and to calculate the flap survival rate.Results:Marked neutrophil infiltration and edema were observed in I/R group, while less neutrophil infiltration was observed in chitosan group. Compared with the sham-operated group, the PCT and hs-CRP levels of the I/R group after modeling for 3 and 5 days were significantly increased. There were statistically significant differences ( P<0.05); Compared with the sham-operated group, the PCT and hs-CRP levels of the Chitosan group after modeling for 3 days, 5 days were significantly increased. There were statistically significant differences ( P<0.05); Compared with the I/R group, the PCT and hs-CRP levels of the Chitosan group after modeling for 3 and 5 days were significantly induced. There were statistically significant differences ( P<0.05); after modeling for 7 days, the values between all groups were no statistically significant differences ( P>0.01). Compared with the sham-operated group, the SOD level of the I/R group after modeling for 3, 5 and 7 days was significantly induced. MDA level was significantly increaesd; compared with the sham-operated group, the SOD level of the Chitosan group after modeling for 3, 5 and 7 days were significantly induced. MDA level was significantly increaesd; Compared with the I/R group, the SOD level of the chitosan group after modeling for 3, 5 and 7 days were significantly increased. MDA level was significantly induced. They all had statistically significant differences ( P<0.05). In the chitosan group, the survival of flaps was (85.34±10.02)%, which was significantly greater than the I/R group, in which only (41.11±14.17)% of the flap survived ( P<0.05). Conclusions:Quaternary ammonium salt of chitosan combined with closed irrigation can significantly improve flap survival, reduce I/R in transplanted rats＇ skin flaps.