Use of porcine small intestinal submucosa as a prosthetic device for laparoscopic repair of hernias in contaminated fields: 2-year follow-up

Background: Surgisis is a new four- or eight-ply bioactive, prosthetic mesh for hernia repair derived from porcine small intestinal submucosa (SIS). It is a naturally occurring extracellular matrix, which is easily absorbed, supports early and abundant new vessel growth, and serves as a template for the constructive remodeling of many tissues. As such, we believe that Surgisis mesh is ideal for use in contaminated or potentially contaminated fields in which ventral, incisional, or inguinal hernia repairs are required.Methods: From November 2000–May 2003, 53 patients (23 male, 30 female) underwent placement of Surgisis mesh for a variety of different hernia repairs. A total of 58 hernia repairs were performed in our patient population. Twenty procedures (34%) were performed in a potentially contaminated setting (i.e., with incarcerated/strangulated bowel within the hernia or coincident with a laparocopic cholecystectomy/colectomy). Thirteen repairs (22%) were performed in a grossly contaminated field, including one in which an infected polypropylene mesh from a previous inguinal hernia repair was replaced with Surgisis mesh and one in which dead bowel was discovered within the hernia sac. Median follow-up is 19 months with a range of 1–30 months.Results: Of the 58 total repairs, there was one wound infection complicated by enterocutaneous fistula in a patient originally operated on for ischemic bowel. The fistula was in a location independent of the Surgisis mesh. There have been no mesh-related complications or recurrent hernias in our early postoperative follow-up period.Conclusions: Surgisis mesh appears to be a promising new prosthetic material for hernia repair and appears to function well, especially in contaminated or potentially contaminated fields. Obviously, long-term follow-up is still required.     

Preliminary experience with new bioactive prosthetic material for repair of hernias in infected fields

Surgisis (Cook Surgical, Bloomington, Ind., USA) is a new four-ply bioactive, prosthetic mesh for hernia repair derived from porcine small-intestinal submucosa. It is a naturally occurring extracellular matrix which is easily absorbed, supports early and abundant new vessel growth, and serves as a template for the constructive remodeling of many tissues. As such, we believe that Surgisis mesh is ideal for use in contaminated or potentially contaminated fields in which ventral, incisional, or inguinal hernia repairs are required. From November 2000 through May 2002, 25 patients (11 male, 14 female) underwent placement of Surgisis mesh for a variety of different hernia repairs. A total of 25 hernia repairs were performed in our patient population. Fourteen procedures (56%) were performed in a potentially contaminated setting (i.e. with incarcerated/strangulated bowel within the hernia or coincident with a laparoscopic cholecystectomy/colectomy). Eleven repairs (44%) were performed in a grossly contaminated field, including one in which an infected polypropylene mesh from a previous inguinal hernia repair was replaced with Surgisis and one in which necrotic bowel was discovered within the hernial sac. Median follow-up was 15 months with a range of 1–20 months. Of the 25 total repairs, there was one wound infection complicated by enterocutaneous fistula in a patient originally operated on for ischemic bowel. The fistula was in a location independent of the Surgisis mesh. There were no mesh-related complications or recurrent hernias in our early postoperative follow-up period. Surgisis mesh appears to be a promising new prosthetic material for hernia repair, especially in contaminated or potentially contaminated fields. Obviously, long-term follow-up is still required. Electronic Publication     

Laparoscopic herniorrhaphy with porcine small intestinal submucosa: a preliminary study.

INTRODUCTION: Using mesh or a synthetic prosthesis during the laparoscopic repair of inguinal hernias has been demonstrated to be safe and effective. A new material, porcine small intestinal submucosa (SIS mesh), has been successfully used in canine and rodent animal models with excellent results. This mesh is degradable and resorbable with a marked decrease in the possibility of becoming infected. However, the amount of fibroblast ingrowth is equal to that with polypropylene mesh. METHODS: A comparison was made between this new SIS mesh to repair 15 inguinal hernias in 12 patients and polypropylene mesh used in 12 similar patients. A preperitoneal approach with balloon dissection was used in all patients. RESULTS: Demographics were similar in both groups. The results were excellent and compared equally. Complications (seroma, discomfort) were minimal in both groups and were similar. CONCLUSIONS: Porcine small intestinal submucosa, SIS mesh, can be used for laparoscopic repair of inguinal hernias. Long-term follow-up will be necessary to confirm these preliminary results.     

Clinical application of porcine small intestinal submucosa in the management of infected or potentially contaminated abdominal defects

The repair of abdominal wall defects in potentially contaminated or grossly infected fields presents a difficult clinical problem. Polypropylene mesh is relatively contraindicated in these settings because of the potential for chronic infection. The alternatives to polypropylene include polyglactin mesh, which is not associated with chronic infection but is associated with a 100% recurrence of hernia. The ideal prosthetic for this patient group should be resistant to infection and ensure a low rate of hernia recurrence. We studied the use of small intestinal submucosa, which has been reported to be resistant to infection and incorporates into the fascia over 3 to 6 months, in 20 patients with ventral or inguinal hernias (18 ventral, 2 inguinal hernia) in the setting of bacterial contamination. The early postoperative complication rate was 50%. One patient with fasciitis had degradation of the small intestinal submucosa and loss of the bioprosthesis within 7 days. Other early complications included seroma (n = 2), ileus (n = 1), and wound infection (n = 8). No patient experienced chronic infection. Mean follow up was 15.7 months and the rate of recurrence documented by CT or physical examination was 30%. We concluded the following: (1) small intestinal submucosa is an effective alternative bioprosthesis in the management of ventral/inguinal hernia when there is associated bacterial contamination; (2) human vs. pig immune response has not been seen in this patient population; (3) early graft failure due to overwhelming fascial infection was noted in one patient and may be a limitation of this technology in a minority of patients; and (4) early hernia recurrence is relatively low but long-term follow-up has not been completed. Presented at the Forty-Fourth Annual Meeting of The Society for Surgery of the Alimentary Tract, Orlando, Florida, May 18–21, 2003 poster presentation).     

Inguinal hernia repair with porcine small intestine submucosa: 3-year follow-up results of a randomized controlled trial of Lichtenstein's repair with polypropylene mesh versus Surgisis Inguinal Hernia Matrix

Background

The aim of this study was to evaluate the safety and efficacy of Lichtenstein's hernioplasty using Surgisis Inguinal Hernia Matrix (SIHM; Cook, Bloomington, Indiana) compared with polypropylene (PP; Angiologica, Pavia, Italy).

Methods

This was a prospective, randomized, double-blind trial comparing Lichtenstein's inguinal hernioplasty using SIHM versus PP.

Results

Seventy male patients underwent Lichtenstein's hernioplasty (n = 35 in the SIHM group and n = 35 in the PP group). At 3 years after surgery, there were 2 deaths (5.7%) in the PP group and 1 death (2.9%) in the SIHM group (not significant [NS]). Although the study was underpowered to evaluate the recurrence rate, only 1 recurrence (2.9%) was seen in the PP group (NS). Although a significant decrease in postsurgical pain incidence was never observed among patients in the SIHM group, a significantly lower degree of pain was detected at rest and on coughing at 1, 3, and 6 months and on movement at 1, 3, and 6 months and 1, 2, and 3 years. A significant decrease in postsurgical incidence and degree of discomfort when coughing and moving were observed among patients in the SIHM group at 3 and 6 months and at 1, 2, and 3 years after surgery.

Comments

SIHM hernioplasty seems to be a safe and effective procedure.     

小肠黏膜下层材料在青少年（14-18岁）腹股沟疝修补术中应用的初步探讨

目的　探讨小肠黏膜下层材料生物补片在14~18岁青少年腹股沟疝患者治疗中的应用价值。方法　采用前瞻性研究方法,将入组的47例患者分为2组：对照组与治疗组。治疗组使用小肠黏膜下层材料行腹股沟疝平片无张力修补术,对照组采用传统的疝囊高位结扎术治疗。观察并分析术后并发症及复发情况。结果　治疗组平均手术时间51.6±12.7min,高于对照组的38.2±7.5min（P<0.05）,治疗组平均住院时间3.4±1.1d,低于对照组5.1±1.3d（P<0.05）。术中出血量14.4±6.5mL,与对照组13.0±5.9mL比较,无统计学差异（P>0.05）。在术后的并发症的发生情况、复发率、术后疼痛评分上,两组无明显差异。结论　对于14~18岁的青少年腹股沟疝患者,使用小肠黏膜下层材料行无张力疝修补术效果良好,能够缩短住院时间,不会增加术后的疼痛不适与并发症的发生率,安全有效。     

Porcine small intestinal submucosa graft for repair of anterior urethral strictures

OBJECTIVES: We evaluated porcine small intestinal submucosa (SIS) used in the treatment of inflammatory, iatrogenic, posttraumatic, and idiopathic strictures of bulbar and penile urethra. Midterm maintenance of urethral patency was assessed. METHODS: Fifty patients aged 45-73 yr with anterior urethral stricture underwent urethroplasty using a porcine SIS collagen-based matrix for urethral reconstruction. Stricture was localized in the bulbar urethra in 10 patients, the bulbopenile area in 31 cases, and in the distal penile urethra in nine patients. All patients received a four-layered SIS patch graft in an onlay fashion. A voiding history, retrograde and antegrade urethrography, and cystoscopy were performed preoperatively and postoperatively. Failure was defined as stricture confirmed on urethrogram. RESULTS: After a mean follow-up of 31.2 mo (range: 24-36 mo), the clinical, radiological, and cosmetic findings were excellent in 40 (80%) patients. Restricture developed in one of 10 bulbar, five of 31 bulbopenile, and four of nine penile strictures. These all occurred in the first 6 mo postoperatively. All patients with recurrences needed further therapy, but there has been no additional recurrence observed to date. No complications such as fistula, wound infection, UTI, or rejection were observed. CONCLUSIONS: Use of inert porcine SIS matrix appears to be beneficial for patients with bulbar and bulbopenile strictures. Midterm results are comparable to skin flaps and mucosal grafts.     

Evaluation of small intestinal submucosa as scaffolds for intestinal tissue engineering

BACKGROUND: Biodegradable scaffolds have been used for regenerating the small intestine. The aim of this study was to evaluate the feasibility of small intestinal submucosa (SIS) as scaffolds for intestinal regeneration in a rat model. MATERIALS AND METHODS: A tubular one-ply or four-ply SIS was interposed between isolated jejunal segments in rats. The scaffolds were harvested at 2, 4, and 8 weeks after implantation, and the specimens were examined grossly and histologically. RESULTS: Significant contractions were observed in SIS scaffolds after implantation. The one-ply SIS contracted to 44% of its initial length at 2 weeks and continued to contract to 6% of its initial length at 8 weeks. The contraction of four-ply SIS scaffolds was less than that of the one-ply SIS, reaching 29% of its initial length at 8 weeks. Minimal epithelial and smooth muscular regeneration was observed in the SIS scaffolds after implantation. CONCLUSIONS: A significant shrinkage was observed in the SIS scaffolds after implantation. Although the four-ply SIS contracted less than the one-ply SIS, neither scaffold supported significant amount of intestinal regeneration.     

Evaluation of porcine-derived small intestine submucosa as a biodegradable graft for gastrointestinal healing

High-risk anastomoses in the gut may benefit from the application of a synthetic reinforcement to pre vent an enteric leak. Recently a porcine-derived small intestine submucosa (SIS) was tested as a bioscaffold in a number of organ systems. The aim of this study was to evaluate the effectiveness of SIS in stimulating healing in the stomach. Twelve rats underwent surgical removal of a full-thickness gastric defect (1 cm) and subsequent repair with a double-layer patch of porcine-derived SIS. The graft was secured with interrupted sutures placed within 1 mm of the edge of the graft. After 21 days, the animals were killed and their stomachs harvested for histologic examination. Cross sections were processed for paraffin embedding and 4-micron sections were stained with hematoxylin and eosin. All animals survived, gained weight, and demonstrated no signs of peritonitis over the 3-week postoperative period. On postmortem examination, the defect was completely closed in all animals by granulation tissue and early fibrosis. Although most of the luminal surface of the grafted areas remained ulcerated, early regeneration of normal gastric mucosa was seen at the periphery of the defect. SIS may act as an effective scaffolding agent for intestinal mucosa and may offer protection in high-risk anastomoses. Presented at the Forty-Third Annual Meeting of The Society for Surgery of the Alimentary Tract, San Francisco, California, May 19–22, 2002 (poster presentation).     

Experimental assessment of small intestinal submucosa as a small bowel graft in a rat model

Background/Purpose:

Small intestinal submucosa (SIS) is an extracellular matrix used in tissue engineering. The purpose of this study is to evaluate the feasibility of using SIS as a scafford for small bowel regeneration in a rat model.

Methods:

A 2-cm length tubular SIS graft from donor Sprague Dawley rats was interposed with bilateral anastomosis in the median tract of an isolated ileal loop of Lewis rats used to construct an ileostomy. The grafts were harvested and analyzed at each of the time-points ranging from 2 weeks to 24 weeks after operation using histology and immunohistochemistry.

Results:

Macroscopic examination found no adhesion in the surrounding area of neointestine by 24 weeks, and no stenosis was visible. The shrinkage of neointestine was indicated from 20% to 40%. Histologic and immunohistochemical evaluation showed that SIS grafts were colonized by numerous inflammation cells by 2 weeks. Neovascularization was evident, but the luminal surface was not epithelized. By 4 weeks, transitional mucosal epithelial layer began to line the luminal surface of the graft, and nearly 70% luminal surface of the graft had been covered by mucosal epithelium at 8 weeks. By 12 weeks, the luminal surface was covered completely by a mucosal layer with distinct bundles of smooth muscle cells in the neointestine. At 24 weeks, the neointestine wall showed 3 layers of mucosa, smooth muscle, and serosa.

Conclusions:

The preliminary study suggested that SIS allow rapid regeneration of mucosa and smooth muscle and might be a viable material for the creation of neointestine.     

Porcine small intestinal submucosa as a percutaneous mid-urethral sling: 2-year results

OBJECTIVE: To report the 2-year follow-up results on patients treated with a novel minimally invasive outpatient procedure for placing a mid-urethral sling, using porcine small intestinal submucosa (SIS). PATIENTS AND METHODS: Thirty-four women with urodynamic evidence of stress urinary incontinence (SUI, 19) or of SUI with a positive cough test (15) were treated. A curved ligature carrier was used to create a tract between bilateral suprapubic stab incisions and a 2-cm mid-urethral vaginal incision. A suture secured to each end of the SIS sling was placed through the eyelet of the ligature carrier. Extraction was used to position the sling at the mid-urethra, providing a backboard of support that was remodelled with ingrowth of the patient's autologous tissue. RESULTS: SUI was reportedly cured in 27 of the 34 women (79%) at the 2-year follow-up; three (9%) of those with no complete resolution were pleased with their results, because the improvement allowed them to wear an average one or fewer pads per day. One patient developed de novo urge incontinence. Three patients (9%) developed suprapubic inflammation at 10, 21 and 45 days after surgery; all resolved, but one had a recurrence of SUI. No prolonged retention, erosion or other complications were noted. CONCLUSIONS: Early results with the percutaneous mid-urethral placement of SIS are promising and potentially comparable with those after using synthetic minimally invasive slings.     

The whole truth: comparative analysis of diaphragmatic hernia repair using 4-ply vs 8-ply small intestinal submucosa in a growing animal model

Background

Diaphragmatic reconstruction remains a challenging problem. There is limited information concerning the use of small intestinal submucosa (SIS) in congenital diaphragmatic hernia repair. A canine model was used to evaluate the use of a SIS patch in diaphragmatic reconstruction.

Methods

Eleven beagle puppies (1.6-4.2 kg, 8 weeks old) underwent left subcostal laparotomy, central left hemidiaphragm excision (2 × 7 cm, 50% loss), and reconstruction with a 4-ply group I (n = 5) or 8-ply group II (n = 6) SIS patch. Chest radiographs were taken at time of operation and 3 and 6 months postoperatively. Animals were killed at 6 months. Adhesion formation (both pleural and abdominal), gross visual evaluation of the patch, and histology were compared.

Results

In group I (4-ply), 1 animal died at 3 months from patch deterioration accompanied by stomach herniation that resulted in respiratory failure. In the 4 remaining animals, chest radiographs showed no evidence of herniation or eventration. On physical examination, there was no evidence of chest wall deformity. During gross surgical examination, the 4-ply patches showed thinning, multiple defects, and liver herniation in 3 animals. In 1 pup, the patch was thickened, intact, well incorporated at the repair site, and adherent to the liver and spleen. In group II (8-ply), 1 animal died of cardiopulmonary failure in the early postoperative period. In the other 5 animals, chest radiographs showed evidence of eventration in 1. On gross examination the patch adhered to the liver in all 5 surviving animals. In 4, the patches were thickened, viable, but had some shrinkage. One patch pulled away from the native diaphragm laterally; however, no visceral herniation was present. In the 1 animal with eventration, there was no evidence of a patch. Adhesion scores (AS) were graded and determined by the sum of extent (0-4), type (0-4), and tenacity (0-3). Average abdominal AS in group I was 5.6 ± 0.8 vs 10.2 ± 0.2 (P = .079) for group II. Average lung AS was 0.6 ± 0.6 in group I vs 3.8 ± 1.1 (P = .0476) for group II. Histological examination showed group II patches had greater collagen deposition with central calcification and mild inflammation within the residual graft, whereas group I patches were much thinner and were composed of granulation tissue without evidence of residual graft.

Conclusions

These data indicate that 8-ply SIS repair of diaphragmatic defects was superior (80%; 4/5 to 4-ply, 20%; 1/5, success). Organ adherence appears to be necessary for neovascularization of the SIS composite. Eight-ply grafts appear to be more durable and persist for a longer period, which may improve neovascularization. Long-term follow-up to evaluate remodeling characteristics of the patch material is required.     

组织工程补片膀胱扩大术治疗神经源性膀胱的疗效分析

目的 探讨使用小肠黏膜下层(small intestinal submucosa,SIS)组织工程材料补片行膀胱扩大术治疗神经源性膀胱的可行性和有效性. 方法 2011年1月至2014年3月收治14例神经源性膀胱患者,男10例,女性4例.年龄14～65岁,平均29岁.脊髓发育不良8例,脊髓损伤6例.尿动力学检查:最大膀胱测压容量平均为(150.1±64.2) ml,膀胱顺应性平均为(5.2±3.9)ml/cmH2O(1 cmH2O=0.098 kPa),最大逼尿肌压力平均为(44.1±29.2) cmH2O.14例均接受SIS组织工程补片膀胱扩大术,术中将补片锁边缝合至纵向剖开的膀胱浆肌层,达到扩大膀胱的目的,其中7例同期行输尿管抗反流再植术.对术后并发症、影像尿动力学检查参数、尿路核磁水成像及肾功能进行观察评价. 结果 本组14例手术均顺利完成,手术时间平均为120 min.患者术后无代谢紊乱.复查肌酐水平均正常.术后随访6～48个月,平均24个月.尿动力学检查术后6、12、24个月最大膀胱测压容量分别为(274.9±88.7)、(322.5± 144.4)、(279.9± 157.9) ml,与术前比较差异有统计学意义(P＜0.05);术后12、24个月最大逼尿肌压力为(20.1±9.8)、(20.2± 19.1) cmH2O,与术前比较差异有统计学意义(P＜0.05);术后24个月膀胱顺应性为(26.1±29.4) ml/cmH2O,与术前比较差异有统计学意义(P＜0.05).术后1个月,2例出现膀胱吻合口尿外渗,更换导尿管引流通畅后愈合.术后3个月,1例出现膀胱结石,行经尿道取石术后未再复发.术后12个月,4例出现膀胱输尿管反流,其中2例予膀胱逼尿肌A型肉毒素注射术,术后留置尿管3个月复查反流消失;2例保留导尿,口服琥珀酸索利那新(5 mg,2次/d)和酒石酸托特罗定(4 mg,1次/d)6个月后,1例反流消失,1例仍存在反流.结论 SIS组织工程补片用于膀胱扩大术可达到有效增加膀胱容量的目的.生物工程补片的使用为治疗神经源性膀胱提供了新的选择.     

Nano-silver modified porcine small intestinal submucosa for the treatment of infected partial-thickness burn wounds

Background and aimSilver has been widely used as a topical antimicrobial agent in burn wound care. In a previous study, we demonstrated the introduction of nano-silver particles to porcine small intestinal submucosa (NS-PSIS) led to significant enhancement in antibacterial property in repairing contaminated abdominal defect. In this study, we explored the efficacy of NS-PSIS in the treatment of Pseudomonas aeruginosa-infected partial-thickness burn wounds.Methods48 male Sprague-Dawley rats were divided into four groups of equal number. Standardized and reproducible Pseudomonas aeruginosa-infected partial-thickness thermal burns wound model were created using these rats. NS-PSIS, PSIS (porcine small intestinal submucosa) or lipido-colloid dressingss (Urgotul?) were tested for 14 days to assess their ability to heal the rats’ burn wounds. Control group was without any treatment after the establishment of infected burn-wound. The wound contraction rate, animal body weight change, histological examination, and the quantification of IL-6 and C-reactive protein (CRP) were measured to evaluate the healing effects.ResultsNS-PSIS significantly promoted wound healing and recovered the normal growth of rats. There were significantly lower expression levels of pro-inflammatory cytokine (IL-6) and CRP in NS-PSIS group as compared with the PSIS or Urgotul group in the treatment of infected partial-thickness burn wounds. Histological exams revealed significant less inflammatory cells infiltrating, more re-epithelization and neovascularization in NS-PSIS group. There were also less inflammatory cells infiltrations in the major organs in NS-PSIS group.ConclusionsNano-silver modified porcine small intestinal submucosa (NS-PSIS) can be used as a biological derivative dressing for the treatment of infected partial-thickness burn wounds.     

猪角朊细胞复合小肠黏膜下层体外培养实验

目的 探讨脱细胞小肠黏膜下层（SIS）作为组织工程皮肤支架的可行性.方法 将猪第二代角朊细胞接种于SIS上,接种后第11、13、15、17天通过直接染色、石蜡组织切片、HE染色、抗层粘连蛋白免疫组化染色、透射电镜等方法,观察角朊细胞在SIS上的生长情况.结果 猪角朊细胞接种在SIS上11d形态良好,部分区域形成2～3层细胞组成的复层结构,免疫组织化学染色显示在角朊细胞与SIS之间的细胞外基质中抗层粘连蛋白呈连续阳性表达.13、15、17 d细胞复层结构增多,细胞之间连接紧密,透射电镜下可见细胞内有张力微丝,细胞间有桥粒连接,角朊细胞与SIS之间可见基底膜形成.结论 在猪角朊细胞体外培养中,SIS是良好的细胞黏附支架.     

Use of porcine dermal collagen graft (Permacol) for hernia repair in contaminated fields

Background Complicated hernias often involve contaminating surgical procedures in which the use of polypropylene meshes can be hazardous. Prostheses made of porcine dermal collagen (PDC) have recently been proposed as a means to offset the disadvantages of polypropylene meshes and have since been used in humans for hernia repairs. The aim of our study was to evaluate the safety and efficacy of incisional hernia repair using PDC as a mesh in complicated cases involving contamination. Methods A prospective study of hernia repair of complicated incisional hernias with contamination using PDC grafts was carried out at the Department of General, Emergency and Transplant Surgery of St Orsola-Malpighi University Hospital. Results From January 2004 up to the writing of this article, seven patients were treated for complicated incisional hernias with a PDC prosthesis. In six out of seven patients a bowel resection was carried out. There were not surgical complications. Morbidity was 14.2%. No recurrences and wound infections were observed. Conclusions Incisional hernioplasty using PDC grafts is a potentially safe and efficient approach in complicated cases with contamination.     

猪小肠黏膜下层脱细胞修复补片修复手部软组织缺损的效果分析

目的 对比应用新型再生可降解生物材料猪小肠黏膜下层脱细胞修复补片(SIS)与植皮术在修复手部软组织缺损的治疗效果.方法 2017年12月至2018年12月,共收治手部软组织缺损36例,根据缺损面积与治疗方法分为两组:补片组21例,软组织缺损面积2.0 cm×1.5 cm^9.0 cm×3.5 cm,平均5.3 cm×2.1 cm,采用SIS治疗;植皮组15例,软组织缺损面积9.0 cm×4.0 cm^16.0 cm×9.0 cm,平均12.0 cm×8.5 cm,采用中厚皮片植皮治疗.观察两组治疗方法促进软组织缺损愈合的效果,记录术后14 d、21 d、28 d、3个月创面区愈合情况,并随访评估创面区愈合后的外观、色泽、弹性、感觉恢复与部分肌腱外露的治疗效果.结果 本组36例均获随访,随访时间3~10个月,平均5个月.两组创面均完全愈合,外观、色泽接近,皮肤弹性及感觉均恢复良好.补片组感觉恢复优14例(66.6%),良5例(23.8%),差2例(9.6%);植皮组感觉恢复优9例(60.0%),良4例(26.0%),差2例(14.0%).创面愈合效果补片组优14例,良5例,差2例;植皮组愈合优9例,良4例,差2例.结论 SIS能快速、有效的刺激机体再生出表皮组织,并且新生的表皮经过生长与周围皮肤颜色无明显差异,无明显瘢痕增生,是一种手部小面积浅表软组织缺损的理想修复材料.     

Preliminary results of a two-layered prosthetic repair for recurrent inguinal and ventral hernias combining open and laparoscopic techniques

The use of prosthetic mesh has become the standard of care in the management of hernias because of its association with a low rate of recurrence. However, despite its use, recurrence rates of 1% have been reported in primary inguinal repair and rates as high as 15% with ventral hernia repair. When dealing with difficult recurrent hernias, the two-layer prosthetic repair technique is a good option. In the event of incarcerated or strangulated hernias, however; placement of prosthetic material is controversial due to the increased risk of infection. The same is true when hernia repairs are performed concurrently with potentially contaminated procedures such as cholecystectomy, appendectomy, or colectomy. The purpose of this study is to report our preliminary results on the treatment of recurrent hernias by combining laparoscopic and open techniques to construct a two-layered prosthetic repair using a four ply mesh of porcine small intestine submucosa (Surgisis®, Cook Surgical, Bloomington, IN, USA) in a potentially infected field and a combination of polypropylene and ePTFE (Gore-Tex®, W.L. Gore and Associates, Flagstaff, AZ, USA) in a clean field. From September 2002 to January 2004, nine patients (three males and six females) underwent laparoscopic and open placement of surgisis mesh in a two layered fashion for either recurrent incisional or inguinal hernias in a contaminated field. A total of eight recurrent hernia repairs were performed (five incisional, three inguinal) and one abdominal wall repair after resection of a metastatic tumor following open colectomy for colon carcinoma. Six procedures were performed in a potentially contaminated field (incarcerated or strangulated bowel within the hernia), two procedures were performed in a contaminated field because of infected polypropylene mesh, and one was in a clean field. Mean patient age was 56.4 years. The average operating time was 156.8 min. Operative findings included seven incarcerated hernias (four incisional and three inguinal), one strangulated inguinal hernia, and one ventral defect after resection of an abdominal wall metastasis for a previous colon cancer resection. In two of the cases, there was an abscess of a previously placed polypropylene mesh. All procedures were completed with two layers of mesh (eight cases with surgisis and one with combination of polypropylene/ePTFE). Median follow up was 10 months. Complications included two seromas, one urinary tract infection, two cases of atelectasis and one prolonged ileus. There were no wound infections. The average postoperative length of stay was 7.8 days. There have been no mesh-related complications or recurrent hernias in our early postoperative follow-up period. The use of a new prosthetic device in infected or potentially infected fields, and the two-layered approach shows promising results. This is encouraging and provides an alternative approach for the management of difficult, recurrent hernias.     

小肠黏膜下基质用于胆管重建的研究

目的 探讨在肝外胆管节段性缺失时,小肠黏膜下基质(SIS)用于重建胆管的可行性及相关机制,为胆道重建寻找新的思路.方法 SIS制成管状,实验犬6条,胆总管节段性切除12～15 mm,以SIS管桥接.分别于术后3、9周取材,通过胆道造影、病理等方法观察胆道重建过程和组织重构效果.结果存活率100％,胆瘘、胆道闭塞发生率为0.胆管收缩、狭窄现象普遍,长度收缩约(13.5±4.1)％.病理检查见胆管内膜细胞覆盖植入SIS段胆管,管壁由成纤维细胞构成,新生血管丰富.结论 SIS材料制成管状用于替代胆管节段性缺失是可行的,可以避免胆漏,无管腔塌陷、闭塞.