COMPARATIVE STUDY
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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The effect of pentoxifylline on random-pattern skin-flap necrosis induced by nicotine treatment in the rat.

Cigarette smoke, and specifically nicotine, has been shown to reduce skin-flap survival. The purpose of this study was to determine if the preoperative administration of pentoxifylline can counteract the deleterious effects of nicotine on skin-flap survival in the rat. Sixty rats were distributed into four groups (n = 15). The survival of modified McFarlane skin flaps was assessed on postoperative day 7. The administration of nicotine (0.6 mg/kg) for 24 weeks preoperatively produced an average skin-flap survival of 59 percent; this was significantly decreased compared with controls (p < 0.05). When similarly treated animals were given pentoxifylline (20 mg/kg) for 30 days preoperatively, the mean skin-flap survival improved significantly to 80 percent (p < 0.05). Withholding nicotine for 2 weeks preoperatively also was found to significantly improve skin-flap survival to 73 percent (p < 0.05). Blood filterability was measured as an indicator of viscosity. The blood filterability in rats that received nicotine for 24 weeks was significantly decreased compared with controls (p < 0.05). Both the addition of pentoxifylline preoperatively and the withholding of nicotine for 2 weeks preoperatively were found to significantly improve blood filterability compared with rats that received nicotine alone for 24 weeks postoperatively (p < 0.05).

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