聚L-乳酸修饰的聚丙烯疝补片的研制及动物实验研究

目的将聚L-乳酸修饰的聚丙烯补片应用于动物实验,进一步验证补片的防粘连效果。方法聚L-乳酸修饰的聚丙烯补片置入腹腔并覆盖腹腔缺损,同时与聚丙烯补片为对照组,通过腹腔内粘连面积、粘连程度、组织病理学改变等检查了解补片粘连情况。结果单纯聚丙烯组术后死亡率高,剖腹探查发现补片表面与腹腔脏器发生直接粘连,粘连面积广泛,粘连程度重。聚L-乳酸修饰的聚丙烯组补片表面亦有粘连,主要集中在补片边缘粘连面积、程度较轻。结论聚L-乳酸修饰的聚丙烯平片是可行的,动物实验表明聚L-乳酸修饰的聚丙烯补片可以减少动物的腹腔内粘连。     

防粘连细菌纤维素复合补片动物模型的建立及实验研究

目的将防粘连细菌纤维素复合补片应用于大鼠实验中,进一步探索并验证该补片腹腔内的防粘连效果,为新型补片的研发提供理论基础。方法采用随机数字表法将48只成年Wistar大鼠平均分成2组(每组24例),分别为聚丙烯组(PP组)、防粘连复合补片组(PP/BC组)。每组再随机平均分成2个亚组(每组12例),即短期组(10 d)和长期组(60 d),分别予植入后10 d和60 d肉眼观察补片粘连情况,并取补片及其周围腹壁组织进行组织学观察,比较及评价各组补片的抗粘连效果。结果术后第10天,细菌纤维素复合补片防粘连评分明显优于聚丙烯补片(P0.05)。复合补片周围新生细胞外沉积较多(P0.05),腹腔侧有更明显的纤维结缔组织覆盖,较少的炎细胞浸润(P0.05)。术后第60天,细菌纤维素复合补片粘连评分与聚丙烯补片相比,差异无统计学意义(P0.05),炎细胞浸润较多、多核巨细胞浸润较少(P0.05)。结论细菌纤维素复合补片腹腔内修补的防粘连效果较佳,是一种潜在的腹腔内防粘连疝补片,但能否临床转化仍需进一步研究。     

部分可吸收腹壁疝修补材料的研究

目的 对聚丙烯网（polypropylene mesh，PPM）＋壳聚糖膜部分可吸收复合材料修补大鼠腹壁缺损的效果进行研究。方法 S-D大鼠80只，随机分为单纯PPM修补组（Ⅰ组），PPM＋壳聚糖膜复合材料修补组（Ⅱ组）和商品化防粘连复合补片组（Ⅲ组）。手术造成腹壁缺损，分别采用上述三种补片修补，术后分期进行腹腔内粘连评分，组织学检查及抗张强度的测定。结果 Ⅰ组大鼠术后各期腹腔粘连明显高于Ⅱ组及Ⅲ组（分别P〈0．05），而Ⅱ组及Ⅲ组之间差异无统计学意义（P〉0．05）。电镜下，术后90d观察，Ⅰ组网片表面新腹膜的生长不规则，Ⅱ组网片表面有光滑、完整的新腹膜间皮细胞形成，Ⅲ组网片表面则没有新腹膜形成，而是形成纤维素性包裹层。术后60、90d，三组网片修复腹壁缺损后的抗拉强度差异无统计学意义（P〉0．05）。结论 本研究中利用PPM与壳聚糖膜这两种廉价材料组合后设计的部分可吸收复合网片，可安全放置腹腔，能有效的防止术后的粘连，并维持良好的修复强度，值得进一步研究和开发。     

全腹膜外补片植入术中补片不固定的实验研究

目的评价全腹膜外补片植入术中补片不固定的安全性和有效性。方法将50只SD大鼠建立疝缺损(3cm2)模型,按随机数字表分为2组,使用聚丙烯补片(12 cm2)采用腹膜外补片植入术进行修复。甲组为补片固定组,乙组为补片不固定组。大鼠于术后不同时间分批处死,记录补片的挛缩度、腹壁抗张强度以及组织细胞学变化。结果所有大鼠术后腹腔均无粘连。2组大鼠在术后7 d、14 d、30 d、60 d和90 d补片的挛缩度分别为6.7%±1.3%vs 7.3%±1.5%、12.3%±1.3%vs 12.4%±1.6%、14.0%±2.0%vs 14.5%±1.3%、17.4%±2.1%vs 18.4%±1.5%和18.9%±2.2%vs19.5%±2.6%(P>0.05);2组大鼠的腹壁抗张强度分别为(288.4±8.4)mm Hg vs(286.6±10.2)mm Hg、(300.4±11.2)mm Hg vs(298.8±11.4)mm Hg、(305.0±11.7)mm Hg vs(303.3±16.1)mm Hg、(309.0±10.8)mm Hg vs(307.6±8.9)mm Hg和(311.8±9.8)mm Hg vs(310.0±8.6)mm Hg(P>0.05);2组大鼠的组织细胞学变化一致。结论当补片面积是大鼠疝缺损的4倍以上时,不固定的腹膜外补片植入术是安全有效的。     

脂肪干细胞覆膜聚丙烯补片在大鼠体内的生物相容性

目的探讨脂肪干细胞(ADSCs)覆膜聚丙烯补片在大鼠体内的生物相容性。方法培养扩增检测大鼠脂肪干细胞后,将其接种到聚丙烯补片上,体外培养10 d。成年雄性SD大鼠12只,个体质量约(250±20)g,随机分为覆膜补片组和未覆膜补片组,每组6只。分别将聚丙烯补片和ADSCs覆膜聚丙烯补片植入大鼠的腹壁肌肉表面,30 d后观察补片侵蚀、粘连情况,测量补片厚度、硬度、韧性等,并进行组织学观察。结果细胞呈长梭形,并形成小集落,呈束状、菊花状或旋涡状生长,活力良好,免疫荧光检测结果显示干细胞特异性标记CD90表达≥97%。ADSCs在聚丙烯补片上附着生长良好。植入大鼠体内30 d后,ADSCs覆膜聚丙烯补片炎症反应较聚丙烯补片轻,炎症细胞评分[(0.95±0.23)分vs(2.62±0.40)分,P0.05],而成纤维细胞增殖和新生血管生成却更多,分别为[(2.6±0.4)分vs(1.8±0.4)分,P0.05]和[(2.4±0.4)分vs(1.5±0.4)分,P0.05]。30 d后ADSCs覆膜聚丙烯补片的硬度与聚丙烯补片无明显差别[(2.1±0.3)分vs(2.2±0.3)分,P0.05],而厚度[(2.67±0.37)分vs(1.13±0.24)分,P0.05]、韧性[(2.67±0.31)分vs(2.27±0.26)分,P0.05]等均大于聚丙烯补片。结论 ADSCs覆膜聚丙烯补片相较聚丙烯补片植入大鼠体内后可以减轻局部炎症反应、增加局部腹壁顺应性。     

载有纳米银新型复合补片在污染条件下大鼠腹壁缺损修补中的运用

目的观察载有纳米银新型复合补片在污染条件下对大鼠腹壁缺损修补的应用效果,对其耐受感染和防粘连效果进行评价,进而探讨新型补片在感染条件下腹壁缺损一期修复中应用的可行性。方法成年雄性SD大鼠60只,体重200~280 g,随机分为普通聚丙烯补片组(A组)和新型纳米银复合补片组(B组),制备污染条件下大鼠腹壁缺损模型(缺损面积2 cm×2 cm),分别使用以上两种补片完成一期修复,术后对比观察两组大鼠一般情况及伤口愈合情况,术后30 d处死大鼠观察腹腔脏器粘连情况,同时切取补片及其周围组织进行病理学观察。结果术后30 d内共4只大鼠死亡,其中A组3只,B组1只,死亡原因与补片修补无关。切口愈合情况B组优于A组(P0.05),术后30 d二组均见腹腔脏器与补片粘连,主要为肠管、网膜,B组轻于A组,按照修正的Katada粘连评分方法,差异有统计学意义(P0.05);组织学观察,术后30 d,光镜下聚丙烯补片组依然有大量炎细胞浸润,可见毛细血管生长,成纤维细胞开始大量增生,胶原分泌增多,局部肉芽组织形成。新型纳米银复合补片组创面可见少量炎细胞浸润,成纤维细胞增生,胶原纤维和毛细血管大量增多,肉芽组织结构致密,成熟度高。结论新型纳米银复合补片在污染条件下腹壁缺损的一期修复中,具有更好的耐受感染、抗腹腔粘连特性,具有较好的临床应用前景,但其远期效果及生物安全性尚需进一步研究和评价。     

三种复合补片在污染环境下修补大鼠腹壁缺损的比较研究

目的观察聚丙交己内酯(polylactide-co-caprolactone,PLC)、透明质酸(hyaluronic acid,HA)、胶原蛋白与聚丙烯(polypropylene,PP)网片复合,在污染环境下修补大鼠腹壁缺损后粘连情况和修补效果,比较3种复合补片特点及一期修补可行性。方法成年雄性Wistar大鼠93只,体重150～250 g,随机分为3组(n=31):PP/PLC复合补片组(A组),PP/HA/PLC复合补片组(B组),PP/胶原蛋白/PLC复合补片组(C组)。各组取1只大鼠小肠制备污染源匀浆。其余大鼠制备直径约1 cm的腹壁疝模型后,根据分组将直径1.5 cm的复合补片缝合于腹壁缺损处。术后观察大鼠一般情况;于术后30、60、90 d处死大鼠,大体观察腹腔脏器粘连情况;切取补片及其周围组织进行组织学观察。结果术后10～70 d共6只大鼠死亡,其中A组2只,B组3只,C组1只;死亡原因均与补片修补无关。术后各时间点各组均见腹腔脏器与补片粘连,主要为肠管、网膜、肝。按照修正的Katada粘连评分方法,术后30、60 d各组间粘连评分比较,差异均无统计学意义(P>0.05);90 d时C组粘连评分显著低于A、B组(P<0.05)。组织学观察,术后30 d各组补片周围可见炎性细胞浸润,成纤维细胞出现且胶原分泌增加,可吸收材料残留;60 d时补片周围炎性细胞较前减少,成纤维细胞数量及胶原分泌较前增加,各组仅见PLC残留;90 d时成纤维细胞日趋成熟,可见胶原充填,腹腔面可见间皮层逐渐形成,各组残留PLC较前减少。结论 在污染环境下,PP/胶原蛋白/PLC复合补片在腹腔粘连及局部组织反应方面均优于PP/PLC及PP/HA/PLC复合补片,更适于一期修补大鼠腹壁缺损,但其远期效果及安全性仍待进一步确定。     

不同材质补片固定大鼠膈肌后的炎症反应、粘连及补片皱缩情况对比研究

背景与目的：食管裂孔疝是外科常见病症，临床上多采用补片以无张力修补的方式进行治疗。食管裂孔疝的补片修补中补片的选择及其应用效果方面的实验数据仍相对缺乏。因此，本研究通过在大鼠食道裂孔处膈肌组织上分别固定聚丙烯补片和复合补片，比较两种材质补片对周围组织的影响，以及自身皱缩情况，为临床食管裂孔疝补片的选择提供参考。方法：雄性SD大鼠在分离胃部与肝脏相连接组织显露胃食道裂孔后，分别用单丝缝线将轻量聚丙烯补片（聚丙烯补片组）或复合补片（复合补片组）固定于食道裂孔处膈肌组织，或不进行补片固定（假手术组）。分别在术后7、15、30 d时记录每组每只大鼠的体质量和饮食量。观察30 d后处死大鼠，分析补片皱缩程度、粘连强度以及膈肌组织的病理学变化。结果：各组大鼠手术前后的体质量及每天进食量均无明显的变化（均P>0.05）。复合补片组膈肌组织与补片的粘连范围及粘连程度分值均明显低于聚丙烯补片组（均P<0.05）；两组补片均出现皱缩，但复合补片组术后补片面积明显大于聚丙烯补片组，皱缩率明显低于聚丙烯补片组（均P<0.05）；与假手术组比较，聚丙烯补片组和复合补片组膈肌组织出现局部肌纤维萎...     

复合型疝补片抗粘连动物实验研究

目的评价复合型疝补片在动物模型中的抗粘连作用。方法选用24头实验动物猪,通过腹腔镜在健康家猪腹壁上植入补片,其中12头植入复合型疝补片(研究组),12头植入普通聚丙烯补片(对照组),在术后1个月和3个月两次随访并统计分析补片粘连面积和粘连等级。结果术后1个月和3个月,复合型疝补片的粘连面积和等级均低于普通聚丙烯补片(P0.05)。复合型疝补片术后1个月和3个月的粘连面积和等级差异无统计学意义(P0.05)。结论实验动物模型表明,复合型疝补片抗粘连效果肯定。     

羧甲基纤维素透明质酸钠预防术后腹膜粘连的实验研究

目的 探讨羧甲基纤维素透明质酸钠复合物(CMC-HA)在腹膜粘连预防中的价值.方法 将90只Wistar大鼠分为A、B、C 3组,每组30只,制成腹膜粘连模型后分别于创面置入羧甲基纤维素(CMC)、透明质酸钠(HA)和CMC-HA各3 ml,分别于术后3 d、7 d和14 d观察腹腔粘连情况.结果 术后3 d于光镜下可见,与A组和B组相比,C组大鼠肠壁纤维细胞增生较轻,胶原纤维排列较疏松.术后14 d,C组大鼠腹膜粘连程度明显轻于A组和B组(均P＜0.01).结论 CMC-HA预防术后腹膜粘连安全有效.     

Evaluation of seprafilm and amniotic membrane as adhesion prophylaxis in mesh repair of abdominal wall hernia in rats

INTRODUCTION: Adhesion formation following abdominal wall hernia repair with prosthetic mesh may lead to intestinal obstruction and enterocutaneous fistula. Physical barriers, namely, human amniotic membrane (HAM) or Seprafilm (Genzyme, Cambridge, Mass., USA), a bio-absorbable, translucent membrane composed of carboxymethylcellulose and hyaluronic acid, have been reported to prevent postsurgical intra-abdominal adhesions. OBJECTIVE: Evaluating the effect of HAM and Seprafilm in preventing adhesion formation in the rat model of ventral hernia repair with polypropylene mesh (PPM). MATERIAL AND METHODS: Sixty female Sprague-Dawley rats were divided into three groups. A full-thickness abdominal wall defect was created in each animal. Control animals had the PPM sutured into the defect, whereas in the other two groups, either HAM or Seprafilm were laid over the abdominal viscera before the repair with PPM. Half of the animals in each group were sacrificed on the 21st postoperative day. The remaining rats of the same group were re-operated on the 42nd day for investigation and measurement of the adhesion area in relation to the graft area. RESULTS: Direct mesh repair showed 52.8 and 56% area adhesion formation 3 and 6 weeks postoperatively, respectively. The HAM barrier covered with mesh repair demonstrated 0 and 0.96% area adhesion formation, and the Seprafilm-covered mesh repair showed 0 and 0% area adhesion formation 3 and 6 weeks postoperatively, respectively. Uncovered mesh showed a significantly larger adhesion area than both covered mesh (p = 0.001 and 0.001). Both HAM and Seprafilm were equally effective in preventing postoperative adhesions. CONCLUSIONS: HAM and Seprafilm proved to be an effective antiadhesive barrier in PPM repair of abdominal wall hernia.     

Prevention of adhesions to polypropylene mesh

BACKGROUND: Polypropylene mesh used to repair abdominal wall hernias routinely induces dense adhesions if there is direct contact between the mesh and the viscera. Adhesions may lead later to difficult reoperation, intestinal obstruction, or enteric fistula. STUDY DESIGN: A 2.5-cm square defect was surgically created in the rat abdominal wall and replaced with: 1) polypropylene mesh, 2) Sepramesh (SM), or 3) SM plus Seprafilm. Each group included 20 animals. Adhesion area as a percent of the mesh surface was subjectively quantitated by means of laparoscopy and at sacrifice. Evaluations varied from 7 to 28 days after mesh placement. Tissues were harvested at intervals for scanning electron microscopy. RESULTS: Adhesions were complete by day 7, with no change in area thereafter. Adhesion-free mesh surfaces were found on scanning electron microscopy to be carpeted with mesothelial cells from day 5 on. Polypropylene mesh alone induced adhesions in all rats (20/20). The mean area involved was 92%. With SM, 9 of 20 were adhesion-free. The mean area was 15%. When Seprafilm was added to SM, minimal adhesions developed in 5 of 20 rats, the mean area being 2%. Four of the five were single point omental attachments. CONCLUSIONS: 1) Sepramesh alone reduces polypropylene mesh adhesions by roughly three-quarters. 2) Sepramesh plus Seprafilm nearly eliminates such visceral adhesions. 3) Mesothelial cell coverage of polypropylene mesh confers adhesion resistance.     

Seprafilm reduces adhesions to polypropylene mesh

BACKGROUND: Adhesions to polypropylene mesh used for abdominal wall hernia repair may eventuate in intestinal obstruction or enterocutaneous fistula. A Seprafilm Bioresorbable Membrane translucent adhesion barrier has been shown to inhibit adhesions. This investigation was designed to determine if Seprafilm alters abdominal visceral adhesions to polypropylene mesh. METHODS: A 2.5-cm square abdominal muscle peritoneal defect was created and corrected with polypropylene mesh. Mesh alone was used in 17 rats. In another 17, the Seprafilm membrane was applied between the viscera and the mesh. Five animals had the bioresorbable membrane placed in the subcutaneous space and between the mesh and the viscera. Laparoscopy was performed 7, 14, and 28 days later to evaluate adhesions as a percentage of mesh surface involved. RESULTS: Polypropylene mesh alone was associated with adhesions in every rat. The average area involved was 90%, the minimum was 75%. Adhesions were present within 24 hours and progressed up to 7 days with no change thereafter. When the Seprafilm barrier was used, the mean area involved was 50%. In 16 such rats, the area involved was smaller than any control animal. No adhesions formed in 5 animals. Scanning electron microscopy demonstrated a mesothelial cell layer covering the mesh after 4 weeks. CONCLUSIONS: The use of the Seprafilm adhesion barrier resulted in a significant reduction of adhesion formation to polypropylene mesh (P <.001).     

The use of three different mesh materials in the treatment of abdominal wall defects

Abstract Abstract. Various prosthetic materials have been proposed for the repair of abdominal wall defects. These materials offer tension-free repair and significantly lower recurrence rate. Their respective properties are related to such complications as seroma, infection, fistula formation, intestinal adhesions and removal. We compared the final outcome in treating abdominal wall defects in 56 patients with three different prosthetic materials: conventional polypropylene in a preperitoneal location, expanded polytetrafluoroethylene mesh, and hydrophilic membrane coated polyester mesh in an intraperitoneal location. The hydrophilic coated polyester group exhibited the lowest complication rate and the polypropylene group the highest. Electronic Publication     

肝硬化失代偿期并发肠梗阻患者生存质量及影响因素分析

目的了解肝硬化失代偿期并发肠梗阻患者的生存质量,并分析其影响因素,为临床干预提供依据。方法回顾性收集2018年8月—2019年8月在湖北医药学院附属人民医院收治的39例肝硬化失代偿期并发肠梗阻患者的病例资料,设为观察组,其中男性25例,女性14例,年龄(52.34±2.64)岁,年龄范围39~64岁。采取单纯随机抽样中的随机数字表法,抽取同期42例硬化失代偿期未并发肠梗阻患者的病例资料设为对照组,其中男性30例,女性12例,年龄(51.34±3.45)岁,年龄范围37~68岁。分别对两组患者采用慢性肝病患者生存质量量表——慢性肝病问卷进行调查,比较两组患者的腹部症状、疲劳、全身症状、活动、情感、焦虑各维度得分及生存质量总分,并对影响因素进行分析,其中,正态分布的计量资料采用均数±标准差(Mean±SD)表示,两组间比较采用t检验。计数资料采用χ2检验。生存质量影响因素采用多元线性回归分析。结果观察组患者的腹部症状、疲劳、全身症状、活动、情感、焦虑得分以及总分得分分别为(5.58±1.79)、(4.23±1.74)、(4.93±1.39)、(5.36±1.36)、(4.74±1.05)、(4.26±1.25)、(31.06±6.53)分,对照组得分分别为(6.27±1.12)、(5.47±1.26)、(6.14±0.78)、(5.88±0.93)、(5.45±0.82)、(4.96±0.94)、(33.79±4.01)分,观察组得分均低于对照组,两组间的比较差异均具有统计学意义(P<0.05);多元线性回归结果显示,病程,肝功能Child-Pugh分级,腹痛、腹胀、乏力等不适症状,营养状况,性别,年龄,医疗费用支付方式,家庭人均月收入,焦虑是其影响因素。结论肝硬化失代偿期并发肠梗阻患者的生存质量低于肝硬化失代偿期未并发肠梗阻患者,其影响因素有疾病相关因素,也有非疾病相关因素,医务人员应根据患者情况,给予患者针对性的干预,尽可能改善患者的生存质量。     

Prevention of adhesion formation to polypropylene mesh by collagen coating: A randomized controlled study in a rat model of ventral hernia repair

Introduction In laparoscopic incisional hernia repair with intraperitoneal mesh, concern exists about the development of adhesions between bowel and mesh, predisposing to intestinal obstruction and enterocutaneous fistulas. The aim of this study was to assess whether the addition of a collagen coating on the visceral side of a polypropylene mesh can prevent adhesion formation to the mesh.Method In 58 rats, a defect in the muscular abdominal wall was created, and a mesh was fixed intraperitoneally to cover the defect. Rats were divided in two groups; polypropylene mesh (control group) and polypropylene mesh with collagen coating (Parieten mesh). Seven and 30 days postoperatively, adhesions and amount and strength of mesh incorporation were assessed. Wound healing was studied by microscopy.Results With Parieten mesh, the mesh surface covered by adhesions was reduced after 30 days (42% vs 69%, p = 0.01), but infection rate was increased after both 7 (p = 0.001) and 30 days (p = 0.03), compared to the polypropylene group with no mesh infections. If animals with mesh infection were excluded in the analysis, the mesh surface covered by adhesions was reduced after 7 days (21% vs 76%, p = 0.02), as well as after 30 days (21 vs 69%, p < 0.001). Percentage of mesh incorporation was comparable in both groups. Mean tensile strength of mesh incorporation after 30 days was higher with Parieten mesh.Conclusion Although the coated Parieten mesh was more susceptible to mesh infection in the current model, a significant reduction of adhesion formation was still seen with the Parieten mesh after 30 days, with comparable mesh incorporation in the abdominal wall.     

Seprafilm reduces adhesions to polypropylene mesh and increases peritoneal hydroxyproline

Polypropylene mesh is an effective and widely used material in repairing abdominal wall defects, but it causes dense adhesions when in contact with abdominal viscera directly. As a consequence of this process intestinal obstruction and enterocutaneous fistula may develop. The purpose of the present study was to determine whether Seprafilm, a bioresorbable translucent membrane, reduces abdominal visceral adhesions to polypropylene mesh and whether Seprafilm has any effects on peritoneal tissue hydroxyproline levels. Twenty-six adult Wistar rats were used. A full-thickness abdominal wall defect was created and cecal abrasions were created to induce adhesion formation in each animal. All of the abdominal defects were repaired with polypropylene mesh. In addition a Seprafilm membrane was laid over the abdominal viscera in the Seprafilm group (n = 13). The abdominal cavity was evaluated for adhesion formation, and peritoneal biopsies were taken for the measurement of tissue hydroxyproline levels at the 14th day. The use of Seprafilm resulted in significant reduction in the adhesion formation (P = 0.002) and a significant increase in peritoneal hydroxyproline level (P < 0.0001). These findings demonstrate that the increase of peritoneal hydroxyproline levels caused by Seprafilm might play a role on the antiadhesive effects of Seprafilm.     

Experimental study of Composix mesh for ventral hernia

We aimed to compare conventional single-layer mesh and composite mesh in terms of the degree of tissue repair on the abdominal wall side of the mesh and the degree of mechanical adhesion to the intestine and to confirm the stability of composite mesh. We used a single-layer polypropylene (PP) mesh and a two-layer Composix mesh (E/X type) consisting of a PP mesh and an expanded polytetrafluoroethylene mesh. Twenty rats were divided into two groups. Three months after mesh placement, histopathologically, ingrowth of granulation tissue into the mesh on the abdominal wall side was prominent without mesh shrinkage or shift in either group. In the PP mesh group, 50% of the rats had firm adhesions between the mesh and the intestine, whereas the Composix mesh group had no adhesions to the intestine. Unlike conventional PP mesh, Composix mesh prevented adhesions to the intestine on the peritoneal side without impairing tissue union with the visceral peritoneum, suggesting its usefulness in clinical onlay mesh repair for ventral defects.     

Modifications in the abdominal wall after prostheses implant in guinea pigs. Experimental preliminary study

The treatment of giant incisional hernias is often not possible without the use of alloplastic materials (prostheses, meshes). Some of the modern prostheses seem to be quite "biocompatible" from the chemical point of view, but, the manner of using them is associated with certain complications (infection, seroma formation, intestinal obstruction, digestive fistula and failure of the repair). This preliminary experimental study on Guinea pigs had as a purpose the evaluation of the prostheses incorporation in the abdominal wall, the appearance of specific complications and the need of the biomaterial fixation. The macroscopic and microscopic study used 59 Guinea pigs, utilizing polypropylene (Marlex) and polyester (Mersilene and Plastex) prostheses, implanted pre-peritoneal and intraperitoneal, with or without fixation. The lack of incorporation of the prostheses was observed especially with the Plastex mesh (7 cases). Intestinal adhesions have been the rule after intraperitoneal implant of the prostheses; we registered a case of intestinal obstruction and a case of digestive fistula. Concluding, it is recommended the utilization of quality prostheses, especially polypropylene (Marlex) and no longer use of the Romanian polyester mesh (Plastex) which has obvious "biocompatible" problems. The intraperitoneal implant of the prostheses is not indicated. Adequate anchoring af the biomaterials prevents the subsequent migration.     

开放腹横肌松解术治疗造口旁疝合并切口疝20例临床分析

目的 探讨开放腹横肌松解术治疗造口旁疝合并切口疝的临床疗效。方法 回顾性分析2018年1月至2021年12月浙江大学医学院附属杭州市第一人民医院疝和腹壁外科连续收治的20例造口旁疝合并切口疝病人的临床资料,均行开放腹横肌松解加肌后补片修补术,术后随访观察。结果 20例病人中,男性13例,女性7例。年龄(62.3±10.2)岁。17例(85.0%)为结肠造口,3例(15.0%)为回肠造口。均使用标准型聚丙烯补片,补片大小为(553.9±102.5)cm²,手术时间为(146.5±35.8)min,术中出血(137.7±49.3)mL,住院时间为(14.6±3.1)d。术后1例出现浅表手术部位感染,2例Ⅲ型血清肿,均经非手术治疗后治愈。无补片感染、肠梗阻、肠瘘等并发症。随访16.9(5～45)个月,无疝复发或腹壁膨出病例。结论 开放腹横肌松解术是治疗造口旁疝合并切口疝的一种安全、有效的手术方法。