The effect of fibrin glue on inhibition of pericardial adhesions.

The effect of fibrin glue on inhibition of pericardial adhesions was tested using 26 beagle dogs. Dacron patches were sutured to the heart and tincture of iodine was applied to promote adhesions. Fibrin glue (3 ml) was sprayed over the patches in 15 dogs (test group), and was not separated in the remaining 11 dogs (control group). All animals in the test group had minimal adhesions between the pericardium and the epicardium or patched region, and an accumulation of gelatinous material was found in the subpericardial space. Marked fibrosis and a poor demarcation of the subpericardial space were found in the control group. The adhesion score and the visibility of coronary anatomy in the test group were significantly better than in the control group. The tension strength in the test group was significantly less than in the control group. We concluded, therefore, that fibrin glue may also be useful as an adhesion inhibitor.     

Fibrin glue reduces intra-abdominal adhesions to synthetic mesh in a rat ventral hernia model

Postoperative intra-abdominal adhesions are associated with significant morbidity and mortality. In this study, the effect of topical fibrin glue (FG) on adhesion formation in a rat model was investigated. Forty Sprague-Dawley male rats underwent midline laparotomy. Bilateral peritoneal-muscular abdominal wall defects were created and then replaced with premeasured soft tissue Goretex patches. Rats were randomized to FG sprayed over the patches or to a control group. Two observers blinded to the randomization assessed the severity of adhesions to the patch by scoring the density of adhesions (grades 0-3) and the percentage of the patch area covered by adhesions (0-100%). The mean percentage of the patch covered by adhesions was 32.8 +/- 6.1 per cent for the FG group versus 57.9 +/- 6.7 per cent for the control group (P < 0.01). The mean density of adhesions for the FG group was 0.95 (+/-0.17) versus 2.0 (+/-0.21) for the control group (P = 0.001). Topical FG reduces the severity and density of intra-abdominal adhesions in a rat model.     

Comparative Evaluation of Adhesions to Intraperitoneally Placed Fixation Materials: A Laparoscopic Study in Rats

After laparoscopic ventral hernia repair, the nature of the adhesions to fixation materials or to mesh had not been clarified. We examined adhesion formation specific to the fixation material in rats. We designed an experimental laparoscopy setup, and placed four intraperitoneal fixation materials on the peritoneum of rats without a mesh graft. Another group of researchers documented the incidence and intensity of postoperative adhesion formation. The adhesion scores for the nickel-titanium anchor were significantly greater than those for polylactic acid (p = 0.004), a titanium tacker (p < 0.0001), and fibrin glue (p < 0.0001). No adhesions occurred in the fibrin glue group. Fibrin glue is the preferred fixation material because it produced no postoperative adhesions. The nickel-titanium anchor produced heavy adhesions but may be applicable for recurrent hernia cases and in patients with thin abdominal walls.     

Fibrin glue reduces the severity of intra-abdominal adhesions in a rat model

BACKGROUND: The purpose of this study was to determine whether fibrin glue inhibits intra-abdominal adhesions. METHODS: Twenty rats underwent midline laparotomy. To maximize adhesions, bilateral peritoneal muscular defects were created and covered with polypropylene mesh sewn with a braided suture. The bowel was abraded with dry gauze. Rats were randomized to either fibrin glue (FG) sprayed over the mesh or to control (no further treatment) groups. At 1 week, the adhesion density (graded 0 to 3), the percentage of the patch covered by adhesion (0% to 100%), and adhesion type were recorded. RESULTS: The mean adhesion density was 1.45+/-0.33 for FG versus 2.8+/-0.11 for controls (P = 0.001). The mean percentage of adhesions was 36+/-9.9 for the FG group and 94+/-3.7 for controls (P = 0.0002). Bowel or solid organs were adherent to the patch in 6 of 20 (30%) in the FG group versus 12 of 20 (70%) in controls (P = 0.057). CONCLUSIONS: Topical fibrin glue reduces the density and severity of intra-abdominal adhesions in a rat model.     

Fibrin glue inhibits intra-abdominal adhesion formation

To determine the effect of fibrin glue on intra-abdominal adhesion formation, 45 rats were randomized to three groups. Each animal received two adhesion models. Group 1 received no further treatment. Groups 2 and 3 had the adhesion models covered with fibrinogen from fresh frozen plasma (1.77 g/L) and cryoprecipitate (23.6 g/L), respectively. In group 1, 13 of 15 rats had high-grade adhesions in both models. In group 2, high-grade adhesions were noted in nine of 15 rats in model 1 and in 12 of 15 rats in model 2. In group 3, however, high-grade adhesions were seen in only three of 15 rats in model 1, with 11 rats having no adhesions, and in only two of 15 rats in model 2. Histologic analysis suggested accelerated healing in group 3. We conclude that (1) fibrin glue inhibits intra-abdominal adhesion formation in rats, (2) the inhibitory action is dependent on the fibrinogen concentration of the fibrin glue, and (3) adhesions are reduced by fibrin glue regardless of whether the peritoneal defect is closed.     

Inhibition of intra-abdominal adhesions: a comparison of hemaseel APR and cryoprecipitate fibrin glue.

Our previous studies demonstrated fibrin glue (FG) prepared from cryoprecipitate (cryo) inhibits intra-abdominal adhesions in rats. A new FG, Hemaseel APR, is Food and Drug Administration (FDA) approved for hemostasis during cardiac surgery and splenic trauma. This study was undertaken to determine if Hemaseel FG prevents intra-abdominal adhesions, and to compare it to cryo FG. Forty-five rats underwent laparotomy. Bilateral peritoneal-muscular defects were created. Polypropylene mesh was sewn into each defect with a running silk suture. The bowel was abraded with gauze. The rats were then randomized to mesh covered with Hemaseel FG, cryo FG, or control. On postoperative day 7, the severity of adhesions were graded by percentage of mesh covered by adhesion (0-100%) and degree of adhesion (0-3). The mean percentage of mesh covered by adhesion was 9% for Hemaseel FG, 43% for cryo FG (p = .005), and 65% for the controls (p < .0001). The mean density adhesion score was 0.5 for Hemaseel FG, 1.2 for cryo FG (p = .04), and 2.1 for the controls (p < .0001). In the Hemaseel FG group, 77% of patches had no adhesions, compared with 37% in the cryo FG group (p = .004) and 13% in the controls (p < .0001). Thus, Hemaseel FG significantly decreases intra-abdominal adhesions, and is more effective than cryo FG.     

Inhibition of Intra-Abdominal Adhesions: A Comparison of Hemaseel APR and Cryoprecipitate Fibrin Glue

Our previous studies demonstrated fibrin glue (FG) prepared from cryoprecipitate (cryo) inhibits intra-abdominal adhesions in rats. A new FG, Hemaseel APR, is Food and Drug Administration (FDA) approved for hemostasis during cardiac surgery and splenic trauma. This study was undertaken to determine if Hemaseel FG prevents intra-abdominal adhesions, and to compare it to cryo FG. Forty-five rats underwent laparotomy. Bilateral peritoneal-muscular defects were created. Polypropylene mesh was sewn into each defect with a running silk suture. The bowel was abraded with gauze. The rats were then randomized to mesh covered with Hemaseel FG, cryo FG, or control. On postoperative day 7, the severity of adhesions were graded by percentage of mesh covered by adhesion (0-100%) and degree of adhesion (0-3). The mean percentage of mesh covered by adhesion was 9% for Hemaseel FG, 43% for cryo FG (p = .005), and 65% for the controls (p &lt; .0001). The mean density adhesion score was 0.5 for Hemaseel FG, 1.2 for cryo FG (p = .04), and 2.1 for the controls (p &lt; .0001). In the Hemaseel FG group, 77% of patches had no adhesions, compared with 37% in the cryo FG group (p = .004) and 13% in the controls (p &lt; .0001). Thus, Hemaseel FG significantly decreases intra-abdominal adhesions, and is more effective than cryo FG.     

Esophagogastric anastomoses: the value of fibrin glue in preventing leakage

Disruption of an esophagogastric anastomosis can result in a high mortality despite aggressive treatment. The efficacy of fibrin "glue" to seal esophagogastric anastomoses was evaluated as a means of preventing this complication. A left thoracotomy was performed in 25 adult mongrel dogs. After esophagogastric resection, a standardized esophagogastrostomy was performed and eight interrupted sutures were used to completely close the posterior wall. The anterior wall was approximated with only three sutures, leaving four large holes between sutures. The dogs were then randomized into the control group (n = 14; no attempt to seal the leaks) or into the fibrin glue-treated group (n = 11). An average of 3.3 ml of glue was applied to the anterior wall of the anastomosis in the treated group. In the control group, 13 of 14 dogs (92.9%) died of anastomotic leak a median of 3 days after operation. In the fibrin glue-treated group, only four of 11 dogs (36.4%) died of anastomotic leaks (p less than 0.01). Dogs that survived were put to death at 14 days. Postmortem examination in all dogs revealed no deleterious effects or complications related to the glue. Postmortem examination of the one surviving control dog and the seven fibrin glue-treated dogs that did not die of sepsis revealed a healed anastomosis without abscess formation. We conclude that fibrin glue is effective in lessening the incidence of esophagogastric anastomotic leaks as employed in this experimental model.     

Role of fibrin glue in the prevention of peritoneal adhesions in ventral hernia repair

Purpose The aim of this study was to investigate the effects of fibrin glue on the prevention of postoperative peritoneal adhesion to prosthetic materials used in ventral hernia repair. Methods Ten pigs were included in this study. The abdomens of the animals were opened by means of a median subumbilical laparotomy to place four prostheses that were cut into square pieces of 4 × 4 cm. The two prostheses in the most cephalic position were polypropylene meshes, and the other two prostheses in a more caudal position were expanded polytetrafluoroethylene prostheses (Dualmesh Plus Corduroy). The prostheses on the right side of each animal were previously impregnated with fibrin glue. After 5 weeks, the animals were reoperated on to assess the quantity and quality (consistency) of the adhesions. Results There were fewer intraperitoneal adhesions and they were more labile in the case of prostheses impregnated with fibrin glue. Moreover, we also observed that in many of the animals the polypropylene mesh did not show any adhesions, although polypropylene has been considered to be a typical adhesion producing material. Conclusions Fibrin glue reduces both the quantity and consistency of adhesions, even in the case of polypropylene meshes.     

The effectiveness of fibrin glue sealant for reducing experimental pulmonary ari leak

The effectiveness of fibrin glue as a biological sealant for pulmonary air leaks was determined in 16 dogs. A standardized pleural defect was made in the left lower lobe, and the quantity of air passing through a chest tube was assessed with a Collins respirometer. For the 8 randomly assigned control animals, the air leak decreased over 90 minutes from a mean of 1.4 L/min to a mean of 1.1 L/min (mean decrease, 19.8%). In the 8 randomly assigned fibrin glue-treated animals, the air leak decreased from a mean of 2.1 L/min to a mean of 0.5 L/min (mean decrease, 80.8%) (p less than 0.0001). Postoperative evaluation of survivors disclosed no increased adhesions in the glue-treated animals and complete resorption of the glue at 3 months. We conclude that in this animal model, fibrin glue reduced the size of pulmonary air leaks in the early period after thoracotomy and did not lead to increased intrapleural adhesions.     

Effect of 5-Fluorouracil plus Interferon on the Integrity of Colonic Anastomoses Covering with Fibrin Glue

Background It has been well established that the immediate postoperative intraperitoneal administration of chemotherapeutic agents such as 5-fluorouracil (5-FU) after curative colon resection for colon cancer destroys disseminated cancer cells and inhibits micrometastases but also inhibits anastomotic healing. On the other hand, the application of fibrin glue constitutes a physical barrier around the anastomosis and may prevent anastomotic leakage. The purpose of this experimental study was to determine the effect of 5-FU plus interferon (IFN)-α-2a on the integrity of colonic anastomoses covered with fibrin glue when injected intraperitoneally immediately after colon resection. Materials and Methods Sixty rats were randomized to one of four groups. After resection of a 1-cm segment of the transverse colon, an end-to-end sutured anastomosis was performed. Rats of the control and the fibrin glue groups were injected with 6 ml of 0.9% sodium chloride (NaCl) solution intraperitoneally. Rats in the 5-FU + IFN and the 5-FU + IFN + fibrin glue groups received 5-FU plus IFN intraperitoneally. The colonic anastomoses of the rats in the fibrin glue and in the 5-FU + IFN + fibrin glue groups were covered with fibrin glue. All rats were sacrificed on the 8th postoperative day, and the anastomoses were examined macroscopically. The bursting pressure measurements were recorded, and the anastomoses were graded histologically. Results Only the 5-FU + IFN group had anastomoses rupture, and the rupture rate (33%) in this group was significantly greater than in the other groups, where there were no ruptures (P = 0.015). The adhesion formations score was, on average, significantly higher in rats of the 5-FU + IFN group compared with the control group (P = 0.006) and the 5-FU + IFN + fibrin glue group (P = 0.010). Bursting pressures were significantly lower in the control group when compared to the fibrin glue and 5-FU + IFN + fibrin glue group (P < 0.001). Rats in the 5-FU + IFN + fibrin glue group developed significantly more marked neoangiogenesis than rats in the other groups. Inflammatory cell infiltration, collagen deposition, and fibroblast activity did not differ significantly among the four groups (P = 0.856, P = 0.192 and P = 0.243, respectively). Conclusion The immediate postoperative intraperitoneal administration of 5-FU plus IFN impairs colonic healing. However, when the colonic anastomoses were covered with fibrin glue, the injection of 5-FU plus IFN had no adverse effects on the integrity of the anastomoses.     

术后早期腹腔化疗下联合应用生长激素和生物蛋白胶对结肠吻合口愈合的影响

目的研究联合应用生长激素(GH)和生物蛋白胶(FS)对术后早期腹腔化疗条件下结肠吻合口愈合的影响。方法Wister大鼠48只,随机分为4组：对照组,单纯行肠切除吻合；腹腔化疗组(5-FU组),术后连续3 d腹腔内注射氟尿嘧啶(5-FU)(20 mg·kg~(-1)·d~(-1))；FS组,术中应用FS、术后给予早期腹腔化疗；GH联合FS组,术中应用FS、术后给予GH(1 mg·kg~(-1)·d~(-1))及早期腹腔化疗。术后8 d处死各组大鼠,剖腹切取吻合口进行评分(评分越高提示吻合口与周围组织的粘连越重)和测量吻合口破裂压力及进行吻合口组织学评分。结果GH联合FS组的吻合口评分2．00,低于FS组(2．13)和对照组(2．38),但P＞0．05,差异无统计学意义；GH联合FS组显著低于5-FU组的2．75,P＜0．05；差异有统计学意义。GH联合FS组的吻合口破裂压力229．9475,高于对照组(199．7525)和FS组(199．4338),P＜0．05；显著高于5-FU组(171．7938),P＜0．01。GH联合FS组的吻合口组织学评分2．9,高于FS组(2．3)和对照组(2．1)及5-FU组(1．7),P＜0．05。结论联合应用GH和FS能提高吻合口愈合强度,促进术后早期腹腔化疗条件下结肠吻合口的愈合。     

Mixing collagen with fibrin glue to strengthen the sealing effect for pulmonary air leakage

BACKGROUND: To strengthen the sealing effect of fibrin glue for pulmonary air leakage, atelocollagen was mixed with the glue and the mixing effect was examined. METHODS: A mixture of fibrinogen and thrombin with atelocollagen was used as a test sample. The concentrations of atelocollagen were adjusted to levels of 0%, 0.375%, 0.75%, 1.1%, and 1.5%. We next performed air leakage tests on a plastic cap with pin holes and swine lung and also measured the elasticity and the adhesion strength. RESULTS: The pressure required to rupture the sealant on a plastic cap with pin holes increased as the concentration of atelocollagen increased, and the bursting pressures were significantly higher in the glue with 0.75%, 1.1%, and 1.5% of atelocollagen than in the glue without atelocollagen (p < 0.01 and p < 0.001). The air leakage pressure on the swine lung was significantly higher in the glue with 0.375%, 0.75%, and 1.1% of atelocollagen than in the glue without atelocollagen (p < 0.05 and p < 0.01), and it was the highest with 0.75%. The elasticity of the glue significantly increased as the concentration of atelocollagen increased (p < 0.001). However, the adhesion strength of the glue significantly decreased as the concentration of atelocollagen increased (p < 0.05 to p < 0.001). CONCLUSIONS: The mixing of atelocollagen with fibrin glue more effectively sealed pulmonary air leakage due to an increased elasticity of the glue while its adhesion strength decreased. The optimal concentration of atelocollagen in the fibrin glue to obtain the best sealing effect was 0.75%.     

Prevention of postoperative air leakage from lungs using a purified human collagen membrane-polyglycolic acid sheet.

BACKGROUND: Human amnion has useful biomedical applications because it contains a large amount of human collagen fibers. We prepared purified human collagen membrane (HCM) from human amnion and used it to develop a new sheet by combining it with synthetic bioabsorbable polyglycolic acid (PGA) mesh. We evaluated its efficacy in preventing air leakage from the lungs of dogs. METHODS: In 20 dogs, HCM-PGA sheet (n = 5), sheets using fibrin glue with a separate application method (n = 5), a mixed application method (n = 5), and fibrin glue alone (n = 5), were used as dressing materials after partial lung resection. RESULTS: The HCM-PGA sheet using fibrin glue with a separate application method was shown to be significantly more effective by an air leakage pressure test than the other three methods. These results indicate that the HCM-PGA sheet is useful for preventing air leakage from the lung. CONCLUSIONS: The HCM-PGA sheet is more effective than conventional fibrin glue for controlling postoperative air leakage.     

纤维蛋白胶粘合修复周围神经抗牵拉强度动态变化的实验研究

目的　了解用纤维蛋白胶粘合修复周围神经后早期的抗牵拉强度及其动态变化。方法　Wistar大鼠 96只 ,按手术先后随机分为神经缝合组 (n =48)和粘合组 (n =48)。切断大鼠左侧坐骨神经 ,缝合组用 11 0无创尼龙缝线作端端缝合 ,粘合组用纤维蛋白胶粘合两断端。于术后 0、3、7、14、2 1和2 8d 6个时间组 (每组n =8)取材 ,测量神经断裂时的最大负荷、功耗 ,并描绘出神经应力 -应变曲线。结果　神经抗牵拉强度曲线表现出粘弹性特性。缝合组与粘合组的最大抗牵拉强度及功耗 ,在术后 0、14、2 1和 2 8d时差异无显著意义 (P >0 .0 5 ) ;但在术后 3、7d时差异有显著意义 (P <0 .0 1,P <0 .0 5 )。结论　纤维蛋白胶有足够的抗牵拉强度 ,可以满足大鼠神经修复的需要。     

三七凝胶预防椎板切除术后粘连的实验研究

目的:从大体、组织形态学观察分析三七凝胶预防椎板切除术后粘连的有效性和可行性。方法:84只Sprague-Daw ley大鼠(SD大鼠)按单纯随机方法分为4组:三七凝胶组(NG)、单纯三七组(N)、空白对照组(C)、纤维蛋白胶组(FG),每组21只。切除L1-L2右侧椎板,分别在硬膜囊周围涂抹三七凝胶、三七浓缩液、生理盐水、纤维蛋白胶。每组大鼠分别在术后2、4、8周处死。各组在每个时间段各处死7只,其中1个标本作大体观察瘢痕的量、范围、致密程度以及解剖过程中硬膜囊的完整性,其余6个标本作组织切片(HE染色)观察术后硬膜外瘢痕粘连的程度、计算椎管内粘连百分率。结果:术后各个时间段三七凝胶组椎管内预防粘连百分率明显优于单纯三七组、纤维蛋白胶组、空白组(P<0.05或P<0.01)。结论:三七凝胶可以作为一种良好的材料用于预防椎板切除术后硬膜外瘢痕粘连。     

Maxillary sinus floor augmentation using autogenous bone grafts and platelet-enriched fibrin glue with simultaneous implant placement.

OBJECTIVE: The aim of this study was to evaluate the use of autogenous bone in combination with platelet-enriched fibrin glue as a grafting material for maxillary sinus augmentation with simultaneous implant placement in dogs. STUDY DESIGN: The mucous membranes of 12 sinuses in 6 dogs were elevated bilaterally. In the right sinus, autogenous bone mixed with platelet-enriched fibrin glue was grafted into the space between the membrane and the sinus wall. In the left sinus, autogenous bone alone was grafted as a control. At the same time, 2 dental implants were inserted into the grafting material through the maxillary sinus floor. The animals were killed 6 months after surgery. RESULTS: The mean bone-implant contact was 40.5% on the fibrin glue side and 32.3% on the control side (P < .05). The mean height of newly formed bone in the augmented area was 12.2 mm on the fibrin glue side and 10.7 mm on the control side (P < .05). CONCLUSION: The results indicate that the use of autogenous bone mixed with platelet-enriched fibrin glue can achieve results superior to those for grafts of autogenous bone alone. The specific improvements of this technique include enhanced osseointegration of dental implants and increased height of new bone.     

Fibrinkleber und Serombildung nach Abdominoplastik

BACKGROUND: Seroma formation is one of the most frequent complications following abdominoplasty. The effect of intraoperative fibrin sealant on the formation of seroma was investigated in patients who had an abdominoplasty. The relevance of slow vs accelerated fibrin polymerization was determined. MATERIAL AND METHODS: Two different thrombin concentrations (4 IE vs 500 IE thrombin/ml) of fibrin sealant were used in two groups of 20 patients each. The control group consisted of 20 patients with abdominoplasties without fibrin glue adhesion. RESULTS: The group with slow-reacting fibrin sealant (4 IE) had a significantly lower rate of seroma formation than both the high concentration fibrin group and controls (P<0.032 and P<0.018, respectively). In addition, the amount of postoperative drainage was significantly lower in the low-dose group (P<0.000). Patients with seroma had a significantly higher weight of resected tissue (P<0.04). The amount of postoperative drainage, age, and body/mass index had no significant effect on the prevalence of complications. CONCLUSION: The use of slow reacting, low-dose fibrin glue demonstrated a protective effect against the formation of seroma following abdominoplasty. The amount of postoperative drainage was significantly lower.     

Adverse influence of fibrin sealant on the healing of high-risk sutured colonic anastomoses.

The effect of fibrin glue sealing on sutured colonic anastomoses was studied using a 'high-risk' colon anastomosis model in the rat. Animals (n = 104) were randomized to have their sutured anastomosis sealed with fibrin glue or left untreated. They were assessed clinically until they were killed on the fourth day after surgery when contrast radiology, detailed post-mortem examination, anastomotic bursting pressure (ABP) and assessment of adhesion formation were performed. The clinical outcome was worse in the glued group (toxic or death from sepsis: 18 versus seven in the non-glued group; P = 0.0354), which also showed a significantly higher moderate to major leak rate (17 versus two in the non-glued group; P = 0.0009). The median ABP was significantly higher in the glued anastomosis group (96 versus 68 cmH2O in the non-glued group; P = 0.0367). Excessive perianastomotic adhesion formation was significantly greater in the glued group. Microscopic examination showed an extremely intense inflammatory reaction in the glued anastomoses compared with that in the untreated group. These results indicate that sealing of a sutured anastomosis with fibrin glue containing an antiproteinase impairs healing the of anastomotic wound, probably by resisting the ingrowth of vascular granulation tissue during the early stages of repair.     

The influence of intraoperative complications on adhesion formation during laparoscopic and conventional cholecystectomy in an animal model

BACKGROUND: The aim of this study was to evaluate the extent of postoperative adhesion formation after laparoscopic and open cholecystectomy. MATERIALS AND METHODS: Qualified surgeons performed 60 experimental laparoscopic cholecystectomies (LC) in dogs with the aim to acquire the laparoscopic technique. To assess the relation between the complications during the operation (bleeding, laceration of the liver bed, or gallbladder perforation) and the formation of adhesions, surviving animals were divided into four groups according to the type of complication occurred. Assessment of the results was made by second-look laparoscopy 4 weeks after LC using the adhesion index (AI; score range, 0-4). The animals then were killed so the extent of adhesion formation could be measured. As a control, open cholecystectomy was performed in 15 dogs without intraoperative complications. The Mann-Whitney rank-sum test and Dunn's method were used for statistical analysis. RESULTS: No adhesion formation or intraoperative complications were registered in the laparoscopic group I. In all the cases wherein bleeding or laceration of the liver bed occurred and was managed with electrocoagulation, adhesions formed. Adhesion formation in these groups was significantly higher than in "ideal LC" or cases of gallbladder perforation alone (p < 0.01). All the animals in the control group developed significantly more adhesions than those in the experimental group (p < 0.05). CONCLUSIONS: It seems that LC has a lower rate of adhesion formation than the conventional open technique. Complications such as bleeding or laceration of the liver bed during LC can enhance adhesion formation. No adhesion formation can be mentioned in relation to gallbladder perforation during LC.