Development of polyurethane foam dressing containing silver and asiaticoside for healing of dermal wound

 Polyurethane foam dressings for dermal wounds were formulated with natural polyols in order to improve the foam characteristics and the release of 2 active agents, silver and asiaticoside (AS) as an antimicrobial agent and an herbal wound healing agent, respectively. The foam was instantly formed by interaction of polyols and diisocyanate. Hydroxypropyl methylcellulose, chitosan and sodium alginate were individually mixed with the main polyols, polypropylene glycol, in the formulation while the active components were impregnated into the obtained foam dressing sheets. Although the type and amount of the natural polyols slightly affected the pore size, water sorption-desorption profile and compression strength of the obtained foam sheets, a prominent effect was found in the release of both active components. Among natural polyols formulations, foam sheets with alginate showed the highest silver and AS release. Non-cytotoxicity of these foam sheets to human fibroblast cells was confirmed. Antimicrobial testing on four bacteria strains showed that 1 mg/cm2 silver in formulations with 6% of natural polyols and without natural polyols had sufficient content of the silver release with comparable inhibition zone and significantly larger zone than other formulations. In pig study, the foam dressing with 6% alginate, 1 mg/cm2 silver and 5% AS could improve wound healing in both the percentage of the wound closure and histological parameters of the dermal wound without any dermatologic reactions. In conclusion, this innovative foam dressing had potential to be a good candidate for wound treatment.     

Topical hyaluronan alone promotes corneal epithelial cell migration whereas combination with benzalkonium chloride impairs epithelial wound healing

Abstract

Purpose: To evaluate the effects of topical hyaluronan (HA) on corneal epithelial wound healing when administered with or without benzalkonium chloride (BAC).

Methods: A cultured human corneal epithelial cell line (HCE-T) was subjected to in vitro scratch assays and in situ epithelial migration was evaluated in organ-cultured rabbit corneas. The corneal epithelium of C57BL/6J mice was also evaluated to determine in vivo wound healing. An in vivo imaging system was also used to evaluate the effects of HA on eye drop retention on the ocular surface.

Results: The findings revealed the promotion of HCE-T migration, in situ rabbit corneal epithelial migration, and in vivo wound healing in mouse corneal epithelium by HA. Pre-treatment with HA also protected against delayed epithelial wound healing in BAC in vitro. However, pre-treatment with 3?mg/mL HA did not show a protective effect against BAC in vivo, but instead delayed epithelial wound healing and increased detection of cleaved caspase-3. This suggested that HA promotes the retention of BAC on the ocular surface. The instilled HA was retained after 15?min, at a significantly higher rate than for phosphate-buffered saline.

Conclusions: The combination of HA and BAC impaired wound healing in the corneal epithelium.     

Study of therapeutic effects of EGF and PDWHF on nonhealing cutaneous ulcers in patients with diabetes mellitus

The treacle of the nonhwhng cutanoous ulceratiVewounds in cases Of ~ mellitus is an ~ oboeal Problem to be solVed. lh the Past, the attention Of thePhysicianS was paid lllainly to the control of bled sugar,sulgical interVention, ~stlation to the contl'OI ofblood sugar, smpcal intervelltion, ~stalon of agentsto Parent or ~ infechons, etC. No achve measareshaVe been taken to PIDInote the hthe pcness of the ulceyative wounds. The discovery and deepened studies ofthe polpphde factorS open a…     

重组人生长激素对烧伤创面愈合的影响

目的 评价重组人生长激素对烧伤创面愈合的影响。方法 ８４例不同烧伤病人分成给药组和不给药组。给药组予以皮下注射ｒｈＧＨ,其他治疗与不给药组相同,分别观察创面愈合时间,住院天数,测定严重烧伤病人２４ｈ尿尿素氮（ＵＵＮ）排出量。结果 应用ｒｈＧＨ的病例创面愈合时间明显缩短,住院天数明显减少,严重烧伤病人２４ｈＵＵＮ排出量明显减少。结论 ｒｈＧＨ能促进烧伤病人蛋白质合成,加速创面愈合。     

Pro-healing effect of Cinnamomum zeylanicum bark

The ethanol extract of the bark of Cinnamomum zeylanicum was evaluated for wound healing activity in Wistar rats. The extract was administered by the oral route at a dose of 250 mg/kg and 500 mg/kg body weight (1/8 and 1/4 of LD(50), respectively) for all the wound models selected, excision, incision and dead space wounds. The extract significantly enhanced the wound breaking strength in the case of incision wound, the rate of wound contraction and the period of epithelization in the case of excision wound. The granulation tissue weight, its breaking strength and its hydroxyproline content was also increased by the extract in the dead space wound.     

浮针联合麻桂温经汤加味治疗肩袖损伤血虚寒凝证临床研究

目的:观察浮针联合麻桂温经汤加味治疗肩袖损伤血虚寒凝证的临床疗效。方法:选取本院收治肩袖损伤的患者共80例,按随机数字表法分为2组各40例。对照组给予Mulligan动态关节松动术;观察组给予浮针联合麻桂温经汤加味治疗。连续治疗6周后,比较2组疼痛视觉模拟评分法(VAS)、肩关节功能美国加州大学肩关节评分(UCLA)评分、肩关节活动度(ROM)、临床疗效。结果:治疗后,2组VAS评分明显下降,UCLA评分显著升高(P<0.01);观察组治疗后VAS评分明显低于对照组,UCLA评分显著高于对照组(P<0.01)。治疗后,2组前屈、外展、体侧外旋的角度显著增大(P<0.01);观察组治疗后前屈、外展、体侧外旋的角度显著大于对照组(P<0.01)。观察组的优良率为97.50%,高于对照组的80.00%,差异有统计学意义(P<0.05)。结论:浮针联合麻桂温经汤加味治疗肩袖损伤血虚寒凝证疗效确切。     

中西医结合治疗幽门螺旋杆菌阳性消化性溃疡44例

目的:观察清幽I号方联合四联疗法对消化性溃疡(PU)幽门螺杆菌(Hp)的根除率及对溃疡复发的影响。方法:88例PU患者随机按数字法分为对照组和观察组各44例。对照组服用奥美拉唑,20 mg/次,2次/d;枸橼酸铋钾片,2粒/次,2次/d;阿莫西林胶囊,1 g/次,2次/d;克拉霉素,500 mg/次,2次/d。疗程为14 d。14 d后再采用法莫替丁,20 mg/次,1次/d,再治疗14 d。观察组在对照组治疗的基础上加用清幽I号方,1剂/d,常规水煎分2次服用,共28 d。记录治疗后Hp清除情况;采用组织学再生黏膜成熟度评价溃疡愈合质量;进行1年随访观察复发情况。结果:观察组总体疗效有效率为97.73%,对照组为81.82%,观察组优于对照组(P<0.05);观察组Hp清除率为90.9%,对照组为75%,观察组Hp清除率高于对照组(P<0.05);观察组再生黏膜组织学成熟度评价优于对照组(P<0.05);对照组13例复发,复发率45.16%,观察组8例复发,复发率20%,观察组复发率低于对照组(P<0.05);观察组平均复发时间(10.1±1.93)个月长于对照组的(8.7±1.84)个月(P<0.05)。结论:在常规四联疗法的基础上加服清幽I号方能提高Hp清除率,提高溃疡愈合质量,减少/延缓PU复发,提高临床疗效。     

新型局部给药系统促进创伤愈合的研究进展

目的 皮肤组织的创伤修复是临床常见的问题,对于创伤的治疗手段多种多样。方法 对近几年的相关创伤愈合文献进行整理、分析和归纳。结果 阐述了皮肤组织愈合的机制及用于创伤治疗的新型局部给药系统。结论 新型的局部给药系统具有能够增加局部药物浓度、减少不良反应、促进伤口愈合、使用方便、提高患者依从性等特点,新型的给药系统用于治疗局部创伤具有巨大的市场潜力。     

莫匹罗星在动物致伤III类伤口愈合的疗效观察

目的针对动物致伤中III类伤口的高感染率,探讨如何减少感染、促进愈合。方法对我院急诊外科2010年1月1日至2012年12月31日动物致伤的川类伤口随机采用康复新液和莫匹罗星稀释液治疗,并分别采用开放引流及缝合治疗,按拆线日期进行伤口愈合评估,即伤口感染情况的对比研究。结果应用莫匹罗星组治愈率明显高于对照组,缝合与不缝合与用药相关,同种外用药物伤口的感染率无差异。结论莫匹罗星在动物致伤的III类伤口愈合中有促进作用,能减少感染,疗效显著,值得推荐。     

Mucosal co-delivery of ketorolac and lidocaine using polymeric wafers for dental application

The current study aimed to investigate the effectiveness of a developed sodium alginate and polyvinylpyrrolidone K-25 (PVP K-25) polymeric wafer for the co-delivery of ketorolac and lidocaine to soft tissues for healing and pain control following gingivectomy. Nine ketorolac/lidocaine lyophilized wafers were formulated and assessed for their hydration capacity, mucoadhesion ability and in vitro release profile to select the optimum system for further clinical investigation. Wafer F6 containing 2:1 sodium alginate to PVP K-25 and 10% glycerol showed optimum properties and was selected for the clinical study. Twenty patients were included in the study and the ketorolac/lidocaine wafer was assessed versus a market product. Visual pain analog was evaluated daily for the first week and wound healing index was evaluated for one week, two weeks and one month following the procedure. The developed ketorolac/lidocaine polymeric wafer proved to be an effective method of reducing pain and discomfort together with enhancing wound healing following gingivectomy.