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1.
激光微孔猪脱细胞真皮基质制备及创面移植的观察   总被引:6,自引:0,他引:6  
目的 制备激光微孔猪脱细胞真皮基质(PADM),寻找其与自体刃厚皮复合移植的最佳孔间距。方法 采用胰蛋白酶法制备PADM,用激光加工机打孔,制备孔间距为0.8、1.0、1.2、1.5mm的激光微孔PADM。在144只SD大鼠背部制作全层皮肤缺损创面,分为微孔Ⅰ、Ⅱ、Ⅲ、Ⅳ组,依次采用前述4种孔间距的激光微孔 PADM+自体刃厚皮移植;网状组采用网状PADM+自体刃厚皮移植;对照组单纯移植自体刃厚皮。每组24只大鼠。观察移植后2、4、6周各组创面愈合情况,计算移植物成活率和创面收缩率,并行组织学观察。结果 移植后2、4周,微孔Ⅰ、Ⅱ组移植物成活率均低于对照组(P〈0.05),但与网状组比较,差异无统计学意义(P〉0.05);移植后6周,微孔Ⅰ、Ⅱ组成活率明显高于网状组(P〈0.05)。移植后4、6周微孔Ⅰ、Ⅱ组创面收缩率较对照组显著降低(P〈0.05),移植后6周[(16.0±2.6)%、(15.1±2.4)%]明显低于网状组[(19.3±2.4)%,P〈0.05]。组织学观察见各微孔组上皮化良好,胶原纤维排列整齐,基底膜结构完整。结论 孔间距为0.8mm或1.0mm的激光微孔PADM与自体刃厚皮复合移植可提高创面修复质量,其中孔间距1.0mm效果最佳。  相似文献   

2.
脱细胞真皮基质的研究进展   总被引:15,自引:6,他引:9  
烧伤或皮肤组织缺损的创面修复多采用自体中厚或全厚皮片移植 ,供皮区损伤较重易形成疤痕 ,影响外观及功能。而早期自体薄厚皮片 (autologeus thin split- thickness skin,auto- TTS)或刃厚皮移植 ,则往往由于皮片薄、缺少有效的真皮成分和引导性组织再生的作用 ,皮片成活后常形成不同程度的瘢痕增生和挛缩畸形 ;在关节等功能部位更易造成功能障碍 ,影响患者生活质量。近年来脱细胞真皮基质(acellular dermal matrix,ADM)作为一种新型真皮替代物不但受到烧伤与整形外科界的重视 ,也引起了整个美容医学的兴趣。本文对其综述如下 :1  ADM…  相似文献   

3.
目的:探讨不同性状激光微孔脱细胞真皮构建活性基质的可行性。方法:将激光微孔猪脱细胞真皮分成两组即干燥组和湿润组,每组36片。将成纤维细胞悬液分别滴加在两组真皮表面,培养不同时间点后,每组分别随机留取6个孔的培养液,采用双抗体夹心ELISA法测定上清液中人TGF-β1、bFGF含量。结果:随着培养时间的延长,TGF-p。和bFGF分泌量逐渐增多,第8天达到稳定水平,第10、12天与第8天的含量比较差异无统计学意义(P〉0.05);各时间点干燥组各因子的含量均高于湿润组(P〈0.05)。结论:激光微孔猪脱细胞真皮可用为支架构建活性基质,其冷冻干燥后更有利于成纤维细胞的粘附与增殖。  相似文献   

4.
异体脱细胞真皮基质的研究与应用   总被引:18,自引:1,他引:17  
脱细胞真皮基质 (acellulardermalmatrix ,ADM)是异体皮经特殊处理 ,去除其细胞成分后得到的一种真皮替代品。由Livesey[1] 开发研制 ,Lifecell公司生产 ,商品名为AlloDerm ,已获美国FDA批准应用于临床 ,近几年在烧伤和整形外科领域中得到了广泛的应用和发展。1 脱细胞真皮基质的制备方法ADM的制备包含去表皮、脱真皮细胞及冷冻干燥处理 3个基本步骤 ,有两种方法。一是尸体皮经高渗盐水和 12烷基硫酸钠 (SDS)处理 ,形成NaCl SDSADM[1,2 ] ;二是经DispaseⅡ处理…  相似文献   

5.
目的 探讨十二烷基硫酸钠制备脱细胞真皮基质的最佳浓度及作用时间.方法 取临床截肢患者废弃的皮肤,分成90块,随机分成6组,每块约1 cm×1 cm,分别置于0.1%、0.25%、0.5%、1.0%、2.5%、5.0%十二烷基硫酸钠溶液中脱细胞,每隔8 h取材一次,分别取材15次.取材标本行大体和组织学观察.结果 肉眼观察十二烷基硫酸钠作用8 h后,0.25%组可将表皮与真皮完整分离;光镜检查显示0.25%十二烷基硫酸钠在作用40 h后,能将真皮内的细胞及细胞碎片脱净,形成脱细胞真皮基质.制备的脱细胞真皮基质,主要由胶原纤维网架构成,其他组作用120 h也无法形成真正的脱细胞真皮基质.结论 十二烷基硫酸钠制备脱细胞真皮基质的最佳浓度为0.25%,最佳时间为40 h.与其他方法比较,具有简便、快捷、有效、价廉、宜推广等特点,可为临床急诊的修复争取宝贵的时间.  相似文献   

6.
目的探讨十二烷基硫酸钠制备脱细胞真皮基质的最佳浓度及作用时间。方法取临床截肢患者废弃的皮肤,分成90块,随机分成6组,每块约1cm×1cm,分别置于0.1%、0.25%、0.5%、1.0%、2.5%、5.0%十二烷基硫酸钠溶液中脱细胞,每隔8h取材一次,分别取材15次。取材标本行大体和组织学观察。结果肉眼观察:十二烷基硫酸钠作用8h后,0.25%组可将表皮与真皮完整分离;光镜检查显示:0.25%十二烷基硫酸钠在作用40h后,能将真皮内的细胞及细胞碎片脱净,形成脱细胞真皮基质。制备的脱细胞真皮基质,主要由胶原纤维网架构成,其他组作用120h也无法形成真正的脱细胞真皮基质。结论十二烷基硫酸钠制备脱细胞真皮基质的最佳浓度为0.25%,最佳时间为40h。与其他方法比较,具有简便、快捷、有效、价廉、宜推广等特点,可为临床急诊的修复争取宝贵的时间。  相似文献   

7.
脱细胞真皮基质作为一种良好的组织修补材料,现已在多学科领域得到广泛应用,但单纯脱细胞真皮基质却很难很好的满足多学科领域的不同要求.复合型脱细胞真皮基质是在脱细胞真皮基质结构基础上研发的新型生物材料,具有更加优良的特性,可以更好的满足不同的移植环境.本文对近几年复合型脱细胞真皮基质的研究进展作一综述.  相似文献   

8.
目的:研究脱细胞真皮基质(acel lular dermal matrix,ADM)的一种新的制备方法.方法:取大鼠背部皮肤制成厚度0.8m的脱毛皮片,置入1mol/L NaCl溶液中24h,揭去表皮层,再浸入0.5%Triton X-100溶液中室温震荡48h,得到ADM.取标本行组织学观察,并行异体移植实验.结果:NaCl-Triton法制作的ADM,细胞成分脱除彻底,胶原纤维排列规则,没有明显的免疫原性,生物相容性好.结论:采用NaCl-Triton法制备ADM,价廉而有效,利于推广应用.  相似文献   

9.
异种(猪)脱细胞真皮基质微粒注射填充研究   总被引:12,自引:0,他引:12  
目的:探讨一种新型的注射填充材料,方法:将异种(猪)脱细胞真皮基质微粒(简称ADM微粒)注入兔耳背皮下并形成皮丘,定时对植入物进行测量,光镜及电镜观察,临床应用于4例面部凹陷畸形整复。结果:ADM微粒注射后从外围向中央细胞化及血管化,12周左右体积基本稳定,48周时吸收率为26.93%左右,临床应用结果满意。结论:ADM微粒安全性好,吸收率低、使用方便,微创。  相似文献   

10.
异种脱细胞真皮基质作为软组织填充物的生物相容性研究   总被引:5,自引:2,他引:3  
目的 探讨异种脱细胞真皮基质(Xeno-ADM)作为软组织填充物植入大鼠体内的生物相容性,为临床软组织缺损凹陷修复提供参考依据.方法 72只SD大鼠随机分为3组:异种组、异体组和自体对照组.分别将Xeno-ADM、异体脱细胞真皮基质和自体真皮植入各组大鼠背部皮下.术后2~32周,根据病理组织学和形态学变化,评估Xeno-ADM的生物相容性.结果 移植早期(<16周),异种组移植物炎性反应程度较异体组强烈,外周包膜厚度较异体组更厚,血管化程度低于异体组.16~32周,异种组与异体组炎性反应无明显区别,外周包膜形成不明显.结论 Xeno-ADM具有良好的生物相容性,适合作为一种生物软组织填充材料.  相似文献   

11.
Abstract

In recent years the acellular dermal matrix (ADM) has gained popularity in prosthetic breast reconstruction. These procedures involve placement of a closed suction drain in the reconstructed breast. Although it is now widely accepted that ADM has an overall positive effect on the outcome of breast reconstruction, data regarding its effect on postoperative drain secretions is lacking. This study was designed to quantitatively evaluate the influence of ADM on postoperative drain secretions in the setting of immediate prosthetic breast reconstruction (IPBR). This is a prospective, comparative controlled study. Two groups of 16 patients each underwent skin sparing mastectomies (SSM) and IPBR with or without ADM. Closed suction drains were left in all the reconstructed breasts and daily secretion volumes were recorded and compared. Postoperative complications were also noted. Patients in the ADM group showed higher daily and overall secretion volumes compared with patients in the control group (p = 0.014) and the time for removal of the drains was higher by an average of 5 days (13 compared with 8 days, respectively; p = 0.004). There was no correlation between ADM and infection. This study provides the first objective evidence that ADM contributes to elevated and prolonged drain secretions when used for IPBR. This might affect possible prosthesis-related complications (e.g., rotation and malposition, capsular contraction, seroma formation, and infection). This study also noted erythema of the post-mastectomy skin flaps in selected patients, which may be attributable to a local inflammatory reaction to the ADM rather than infection.  相似文献   

12.
13.
The present study was to compare the difference of histological structure and biocompatibility between human ADM and porcine ADM. The scaffold structure, collagen arrangement and collagen structure of human ADM and those of porcine ADM were very similar except for a slight difference in their black and white bands assessed by both light microscopy and electron microscopy. The positive immunohistochemical staining results of porcine ADM using human antibodies of collagen I, collagen III, collagen IV, fibronectin, laminin and vimentin and the result of SDS-PAGE implied a strong homology between the main proteins of human ADM and porcine ADM. In addition, statistical analysis indicated that there was no significant difference (P<0.05) between the biocompatibility of the two ADMs. Based on these results, we conclude that porcine ADM bears a strong similarity to human ADM, and might be a substitute for human ADM in the future.  相似文献   

14.
成纤维细胞-无细胞真皮替代物的生物学活性及移植实验   总被引:29,自引:4,他引:25  
目的 研究含成纤维细胞的无细胞真皮替代物的生物学活性及真皮支架作用。方法 将成纤维细胞种植于无细胞真皮表面培养,形成活性真皮替代物。采用ELISA法和RIA法测定培养上清中IL-6、IL-8、TGF-β1及细胞外基质层粘连蛋白、透明质酸的分泌。并将真皮替代物植入BALB/c-nu小鼠(裸鼠)全层皮肤缺损创面,观察血管化速度、创面收缩率。结果 成纤维细胞种植于无细胞真皮表面生长良好,可形成单层细胞膜片,并分泌多种细胞因子和细胞外基质成份。活性真皮替代物植入创面后,与单纯无细胞真皮移植相比,血管化速度加快,收缩率减小。结论 无细胞真皮上种植成纤维细胞后具有较强的生物学活性,可作为较好的真皮替代物。  相似文献   

15.
目前治疗大面积深度烧伤的方法是刃厚自体皮移植 ,后者因缺乏足够的真皮成分 ,常常造成瘢痕和挛缩。因此 ,研制一种含有足够量真皮成分的永久性皮肤替代物将具有很大的临床意义。将异体 (或异种 )皮用高渗盐溶液处理以去除表皮 ,去污剂处理以去除真皮中细胞成分 ,得到一种无细胞真皮基质。经光镜和透射电镜观察证实 ,它去除了表皮全层和真皮中所有细胞成分 ,保留了完整的基底膜复合物 ,胶原束结构和排列保持正常 ,弹力纤维亦正常存在。与AlloDerm相比 ,无细胞真皮基质具有以下主要优点 :①由于延长去污剂的作用时间 ,真皮中残留的细胞成分被完全清除 ,因此制得的真皮基质更为理想 ;②AlloDerm用同种异体皮制备 ,而无细胞真皮基质除用同种异体皮外 ,亦可用异种猪皮制备 ,因此来源广泛 ,价格低廉  相似文献   

16.
Infections occur in approximately 2-5% percent of women undergoing breast reconstruction by tissue expansion depending on patient characteristics and timing of reconstruction. Bacteria, specifically Staphylococci, are the most common pathogens. Treatment varies depending on the surgeon and the aggressiveness of the infection. We report a case of unilateral tissue expander infection with Candida parapsilosis in an otherwise healthy female undergoing immediate tissue expander placement after bilateral nipple-sparing mastectomies. The patient was treated with a one-stage irrigation, debridement, and tissue expander exchange as well as a 21-day course of oral antifungal therapy. Her infection resolved and she was able to complete her implant-based reconstruction. C. parapsilosis is usually responsible for infections in critically ill patients found in association with central lines, peritoneal dialysis catheters and prosthetic heart valves. The affinity of C. parapsilosis for foreign material makes it a causative agent worth considering in difficult to treat tissue expander infections.  相似文献   

17.
无细胞真皮基质的研制   总被引:1,自引:0,他引:1  
目前治疗大面积深度烧伤的方法是刃厚自体皮移植,后者因缺乏足够的真皮成分,常常造成瘢痕和挛缩.因此,研制一种含有足够量真皮成分的永久性皮肤替代物将具有很大的临床意义.将异体(或异种)皮用高渗盐溶液处理以去除表皮,去污剂处理以去除真皮中细胞成分,得到一种无细胞真皮基质.经光镜和透射电镜观察证实,它去除了表皮全层和真皮中所有细胞成分,保留了完整的基底膜复合物,胶原束结构和排列保持正常,弹力纤维亦正常存在.与AlloDerm相比,无细胞真皮基质具有以下主要优点:①由于延长去污剂的作用时间,真皮中残留的细胞成分被完全清除,因此制得的真皮基质更为理想;②AlloDerm用同种异体皮制备,而无细胞真皮基质除用同种异体皮外,亦可用异种猪皮制备,因此来源广泛,价格低廉.  相似文献   

18.
应用脱细胞异体真皮植入Bucks筋膜下加大阴茎   总被引:8,自引:0,他引:8  
目的探讨一种加大阴茎的手术方法。方法将脱细胞异体真皮填充在阴茎Bucks筋膜与白膜之间加大阴茎。结果自2002年3月以来,我们在临床应用12例,术后自然状态下阴茎周径加大13~31cm,平均26cm,术后3个月有正常的性生活。1例因包扎过紧至阴茎皮肤部分坏死,经转移阴囊皮瓣修复愈合。结论该方法用于阴茎加大,创伤小、操作简便、效果确实,无不良反应。  相似文献   

19.

Objective

In the field of burns repairs, many problems exist in the shortage of donor skin, the expense of allograft or xenograft skin, temporary substitution and unsatisfactory extremity function after wound healing. Previous studies showed that burn-denatured skin could return to normal dermis formation and function. This study investigates the application of laser micro-pore burn-denatured acellular dermis matrix (DADM) from an escharotomy in the repair of burn wounds and evaluates the biological properties and wound repair effects of DADM in implantation experiments in Kunming mice.

Methods

Specific-pathogen-free (SPF) Kunming mice were used in this study. A deep II° burn wound was created on the dorsum of the mice by an electric heated water bath. The full-thickness wound tissue was harvested. The necrotic tissue and subcutaneous tissue were removed. The denatured dermis was preserved and treated with 0.25% trypsin, 0.5% Triton X-100. The DADM was drilled by laser micro-pore. The biological properties and grafting effects of laser micro-pore burn-DADM were evaluated by morphology, cytokine expression levels and subcutaneous implantation experiments in Kunming mice.

Results

We found statistical significance (P < 0.05) of the elastic modulus (MPa), maximum load force (N) and contraction measurement (CM) of the laser micro-pore burn-DADM (experimental group) compared to the control group (no laser micro-pore burn-DADM). Cytokine expression level was different in the dermal matrixes harvested at various time points after burn (24 h, 48 h, 72 h and infected wound group). Comparing the dermal matrix from 24 h burn tissue to infected wound tissue, the expression level of IL-6, MMP-24, VE-cadherin and VEGF were decreased. We found no inflammatory cells infiltration in the dermal matrix were observed in both experimental and control groups (24 h burn group), while the obviously vascular infiltration and fiber fusion were observed in the experimental group after subcutaneous implantation experiments.

Conclusion

There was better bio-performance, low immunogenicity and better dermal incorporation after treated by laser micro-pore drilling and decellularized deep II° burn-DADM, which may be considered as a better substitute for dermal matrix. Furthermore, the earlier harvested DADM after burn (24 h) shows the better transplantation effect.  相似文献   

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