封闭负压引流技术在海水浸泡爆炸伤创面治疗中的应用研究(一)
发布时间:2018-04-26 10:08
本文选题:封闭负压引流 + 海水浸泡 ; 参考:《大连医科大学》2013年硕士论文
【摘要】:背景:封闭负压引流技术(Vacuum sealing drainage VSD)经大量的临床实践证明对各类创面的治疗效果显著,但在海水浸泡爆炸伤创面领域的应用目前尚未有报道,有关此类创面治疗负压值的选择还需明确。 目的:通过对比观察不同负压下VSD在海水浸泡爆炸伤创面治疗过程中血管内皮生长因子(VEGF)、miRNA-17-5p的表达,摸索其在VSD治疗中的最适负压范围,部分阐明VSD促进海水浸泡爆炸伤创面愈合的机制。 方法:采用体重25kg-30kg大小的实验用小型猪(中国I号)建立爆炸伤模型,在距脊柱中线约10cm处的双侧臀部及肩胛部皮肤做长约2cm全层切口,紧贴皮下钝性分离出直径约2cm的腔隙,置入雷管,外罩聚能器,引爆雷管,形成爆炸创面。迅速清创,去除创面异物及明显坏死组织,创面置于10℃海水(取渤海弯近海天然海域海水)中浸泡60分钟,快速复温。海水浸泡爆炸伤创面随机分为4组,治疗组3组分别给与120mmHg、180mmHg、240mmHg负压吸引,对照组行常规换药治疗。海水浸泡爆炸伤后0、1、3、5、7、9、16、23、30、58天分别切取创缘组织、创面肉芽组织应用组织学、免疫组化及分子生物学技术,对比观察创面愈合及VEGF、miRNA-17-5P的表达情况。 结果:1、海水浸泡爆炸伤创面污浊,出血少,基底及创缘苍白,坏死组织界限不清,继发性坏死出现时间早、持续时间长,感染较重;2、VSD治疗组创面愈合效果明显优于对照组,120mmHg负压治疗下创面炎症反应较轻,未出现继发性坏死,肉芽组织增生明显,上皮爬行及创面愈合速度较快;3、海水浸泡爆炸伤创缘组织中VEGF表达于胞浆内,,早期VSD治疗组表达高于对照组。尤其以120mmHg负压治疗组显著,术后58天创面愈合,VEGF表达接近于正常皮肤组织的表达;4、miR-17-5p可在海水浸泡爆炸伤创面肉芽组织中表达,VSD治疗组表达显著高于对照组。VSD治疗组1天表达最高,180mmHg负压治疗组表达明显高于其它治疗组,随时间推移表达呈逐渐下降趋势,且120mmHg负压治疗组表达持续高于其它组;而对照组的表达则是呈动态变化。各时间点两组间差异有显著意义(均P0.05)。 结论:1、VSD能够促进海水浸泡爆炸伤创面愈合; 2、VSD可以促进VEGF在海水浸泡爆炸伤创面愈合中的表达,以 120mmHg负压治疗组表达显著增高; 3、120mmHg负压治疗下miRNA-17-5P在海水浸泡爆炸伤创面肉芽组 织中表达持续高于其他治疗组; 4、120mmHg的负压可能是治疗海水浸泡爆炸伤的最适负压范围。
[Abstract]:Background: the vacuum sealing drainage VSD has been proved to be effective in the treatment of various kinds of wounds by a large number of clinical practice, but its application in the field of seawater immersion and explosive wound has not been reported. The selection of negative pressure values for this type of wound needs to be determined. Objective: to investigate the expression of vascular endothelial growth factor (VEGF) VEGF miRNA-17-5p in the treatment of explosive wound with seawater immersion under different negative pressures, and to explore the optimal range of negative pressure in the treatment of VSD. The mechanism of VSD promoting wound healing after seawater immersion and explosion injury was explained. Methods: a model of explosive injury was established in miniature pig (China I) with the size of 25kg-30kg. The skin of both buttocks and scapula was cut by 2cm at the point about 10cm from the midline of spine, and the space of 2cm was obtuse separated from the skin of subcutaneously, and the space of 2cm was obtuse. The detonator is placed, the shell accumulator, detonates the detonator, forms the explosive wound. Rapid debridement, removal of wound foreign bodies and obvious necrotic tissue, and soaking of the wound in 10 鈩
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