Objective To explore the effectiveness and safety of topical phenytoin for wound healing. Methods We searched MEDLINE (1966 to Oct. 2002), EMBASE (1984 to 2002), The Cochrane Library (Issue 4, 2002), Biological Abstracts (1993 to 1996), Cancerlit (1997 to Sept. 2002), Life Science Collection (1982 to Mar. 1995), International Pharmaceutical Abstracts (1970 to 2002), and CBMdisc (1978 to Jan. 2003). Controlled trials on topical phenytoin for wound healing were identified. The methodological quality of included studies was assessed, and a descriptive analysis was performed. Results Nine studies (507 cases) including 1 randomized controlled trials (RCT) and 8 non-randomized controlled trials were included. These studies were of poor methodological quality. Because there were a variety of etiology of ulcers, differnet interventions in control groups, and different outcome measures, for which meta-analysis was difficult to perform, a descriptive analysis of the results was presented. Most studies showed that topical phenytoin had better effects on improving healthy granulation appearance, increasing complete recovery rate, reducing time for complete recovery, and positive cases of bacterial culture than those of control groups. Mild side effects were observed in only one study.Conclusions The reviewers think that the inclusion studies less rigorous than randomized controlled trials could result in misleading findings.Some well designed randomized controlled trials of topical phenytoin for wound healing are warranted.
OBJECTIVE Influence of irradiation and phenytoin sodium on modulatory activities of wound fluid on proliferation of fibroblasts and collagen synthesis was studied. METHODS The male Wistar rats were used in this study. The rats were divided into irradiated and non-irradiated groups, and in each of them it was subdivided into phenytoin group and control. A 7 cm long incisional wound was made on the back of each rat, in which a polyvinyl alcohol sponge (PVAS) with a size of 1.0 cm x 0.4 cm was implanted into the wound and the wound was sutured up. The PVAS was prepared by rinsing in running water over night and then was boiled for 30 minutes. Before implantation, the sponge was immersed in phenytoin sodium solution (10 mg/l ml) or normal saline (as control). From each wound the wound fluid and fibroblasts were collected. The methods of incorporation of 3H were adopted to assess the proliferation of fibroblasts and synthesis of collagen. RESULTS It was shown that proliferation of fibroblasts and collagen synthesis were stimulated by wound fluid remarkably on 5 to 8 days after wounding, and that 6 Gy to total-body irradiation wound decrease this effect. It was also noted that topical phenytoin sodium increased the modulatory activity of wound fluid irrespective of being irradiated or not. CONCLUSION It could be drawn that, after total-body irradiation, stimulation of hyperplasia of fibroblasts and collagen synthesis by wound fluid was markedly lowered indicating the total-body irradiation resulted in changes of local conditions of the wound which was unbenefitted to repair of tissue cells, while phenytoin sodium could enhance the stimulating action of wound fluid on proliferation of fibroblasts and synthesis of collagen which was beneficial to wound healing.
It was reported that the systemic use of phenytoin could promote healing of fracture. In order to observe the effect of local application of phenytoin in the healing of fracture, the experiment was performed. Seventy-two rabbits were divided into three groups. Fractures were created on both radius of all rabbits. Group 1, intraperitoneal injection of phenytoin with a dosage of 50 mg/kg per day; Group 2, local use of phenytoin with a dosage of 40 mg/kg was injected in the fracture site every seventy-two hours, and Group 3, injection mormal saline of in the control group. Eight rabbits in each group were sacrificed in the 9th, 16th and 30th days after operation respectively. By X-ray excuiualtion, the healing of fracture was observed. Dry and wet weights of the callus were determined. After HE and Mallory’s stain, the samples were examined under microscope. Results showed that both local and systemic use of phenytoin promoted healing of fracture. The effects of phenytoin in the two groups were the same and had no significant difference.
An experiment on the effect of phenytoin onthe healing of wounds of rabbits with the selfcontrol was otiserved from the followingparameters: the reduction of surface area ofwound, the time required for the healing ofwound, examination of the wound tissues bylight and electronic microscope , and the bacterialcounts of the wound. It was noted thatphenytoin was capable to increase the rate ofwound healing, reduce the time of woundhealing, enhance the growth of healthygranulation tissue, enh...
Twelve intractable wounds had been treated with topical pure phenytoin powder since October, 1989. The result was excellent. The cases treated induded chronic ulceration of low extremity, post irradiation ulcers and residual wounds from burn. The surface area of ulcers varied from 3×3cm to 10×13cm, a mean of 6×7cm; the residual wound from burn from 1% to 9%, a mean of 5%. The traditional therapy or skin graft both failed to give any healing of the wounds. The duration of the wound existed from 1 month to 20 years. After topical phenytion, 8 cases intractable lesions healed completely and 4 with the combination of skin graft. The mean time for wound healing was 29.37 days.The method,results and the mechanism of enhanccment of healing of intractable lesions from topical phenytion discussed.
Objective To study the clinical efficacy of topiramate combined with carbamazepine combined with phenytoin in elderly seizures. Methods A total of 105 elderly patients with epilepsy were enrolled in this study from August 2014 to July 2016 in Fuzhou Chinese and Western Medicine Hospital. The patients were aged 61 to 80 years. There were 42 males and 63 females with epilepsy. The course were 1 to 5 years; 55 cases were partial onset, 50 cases were systemic attack. According to the different treatment methods, the patients were divided into A, B, C three groups, each group were 35 patients. Group A was daily treated with 4 to 8 mg/kg topiramate; Group B was treated with 0.3 g carbamazepine combined with 250 to 300 mg phenytoin per day. Group C was daily treated with 4 to 8 mg/kg topiramate and 0.3 g carbamazepine combined with 250 to 300 mg phenytoin. The total effective rate, the incidence of adverse reactions, the number of seizures before and after treatment were compared among the three groups. Results The total effective rate of group C was higher than that of group A and B, and the difference was statistically significant (P<0.05). There were no significant differences in the number of epileptic seizures between the three groups before treatment (P>0.05). The number of seizures in group C was significantly lower than that in group A and B (P<0.05). Conclusions The treatment of topical epilepsy patients with topiramate and carbamazepine combined with phenytoin can significantly improve the total effective rate of treatment, protect the safety of medication, reduce the number of patients with epilepsy, so that patients can quickly return to normal life. It would be worthy for clinical promotion and use.
Objectives The purpose of this study is to verify the phenytoin-resistant mesial temporal lobe epilepsy (MTLE) induced by Li-pilocarpine and screened by antiepilepsy drug (AEDs). Methods The rats with MTLE were induced by Li-pilocarpine, which were screened by effect of phenytoin treatment monitored by vedio-EEG. The living microdialysis technology was used for verification of drug concentration in brain of drug-resistant and drug-responsive rat model, and the P-glycoprotein expression was detected by immunohistochemical method. Results Sixteen rats with chronic MTLE were successfully induced in total 30 rats, among which, 6 drug-resistant rats with MTLE were screened. The brain/plasma ratio of area under the curve in drug-resistant rats was significantly lower than that of drug-responsive rats (0.15±0.03 vs. 0.28±0.05, P<0.05). In addition, the P-glycoprotein expression in brain of drug-responsive rats was obviously higher than that of drug-responsive rats (P<0.05). Conclusions The low concentration of phenytoin in drug-resistant rat model with MTLE was verified that might be related to the over-expressed P-glycoprotein in brain.
ObjectiveIn order to evaluate that whether the P-glycoprotein-inhibitor verapamil (VPM) could effect the distribution of antiepileptic drug phenytoin (PHT) in a rat model of mesial temporal lobe epilepsy (MTLE).MethodsThe rat models of MTLE were induced by li-pilocarpine and were randomly divided into two groups (PHT group and VPM+PHT treatment group) to compare the PHT distribution in brain, liver and kidney. Brain dialysate samples were collected by microdialysis technology. And the analysis of samples for PHT concentration was performed by high performance liquid chromatography (HPLC). The comparisons were carried out by t test (or Wilcoxon test).ResultsIn VPM+PHT treatment group, 4 out of 9 rats were dead within 30 minutes after drug administration. The significantly decreased area under the curve (AUC) ratio of brain/plasma in VPM+PHT group was 0.11±0.06 when compared with PHT group 0.21±0.02 (t=3.237, P=0.025), while there were no significant differences in ratios of liver/plasma ［PHT (1.12±0.37) vs. VPM+PHT (0.99±0.27), Z=−0.490, P=0.624］ and kidney/plasma ［PHT (0.74±0.16) vs. VPM+PHT (0.49±0.26), t=1.872, P=0.103］ between two groups.ConclusionsThe P-glycoprotein-inhibitor VPM significantly decreased PHT level in brain of rat with MTLE.