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.     

Fibrin glue to reduce seroma after axillary lymphadenectomy for breast cancer

Axillary lymphadenectomy remains an integral part of breast cancer treatment, yet seroma formation occurs in 15-85% of cases. Among the methods employed to reduce seroma magnitude and duration, fibrin glue has been proposed in numerous studies with controversial RESULTS: Sixty patients underwent quadrantectomy or mastectomy with level I/II axillary lymphadenectomy; a suction drain was fitted in all patients. Fibrin glue spray was applied to the axillary fossa in 30 patients; the other 30 patients were treated conventionally. Suction drainage was removed between postoperative days III and IV. Seroma magnitude and duration were significantly reduced (P=0.004 and 0.02, respectively), and there were fewer evacuative punctures, in patients receiving fibrin glue compared with the conventional treatment group. The authors conclude that the use of fibrin glue does not always prevent seroma formation, but does reduce seroma magnitude, duration and necessary evacuative punctures.     

Influence of fibrin glue on seroma formation after breast surgery

BACKGROUND: This study was designed to determine the effectiveness of Hemaseel APR fibrin sealant versus conventional drain placement in the prevention of seromas after breast procedures. METHODS: A prospective, randomized, controlled study of subjects who were randomized into control (drain) and experimental (fibrin) groups was conducted. RESULTS: Analysis of 82 patients showed similarly matched groups. Seroma formation rate was 45.5% in the control group and 36.8% in the fibrin glue group (P = 0.43). The rate of wound complications was similar. Aspirate volumes were significantly greater in the fibrin glue group. Drain placement saved patients >366 US dollars over fibrin glue. CONCLUSIONS: Although use of fibrin sealant resulted in a nonsignificant decrease in seroma formation rate compared with that of drain placement, the higher cost involved, cumbersome technique, and higher aspirate volumes tend to indicate that there is no advantage to using fibrin glue over drain placement with the technique described.     

Effect of fibrin glue on lymphatic drainage and on drain removal time after modified radical mastectomy: a prospective randomized study

Seroma formation is a frequently occurring complication in patients operated on because of breast cancer. This complication can be the cause of flap necrosis, can lead to infection, and can prolong the hospital stay. It can also cause a delay in chemotherapy and radiotherapy. In order to prevent seroma formation, various methods such as external compression dressings, immobilization of the arm, sclerotherapy, and suction drainage have been used, without much success. In animal models and some clinical studies, it has been stated that fibrin glue reduces seroma formation, and these statements generated high expectations. For this reason, a prospective study was planned to test this in patients who underwent modified radical mastectomy (MRM) because of breast cancer. Of the 54 patients studied, 27 patients had fibrin glue (4 ml) applied to wound surfaces and under the flap (study group); the remaining 27 patients were the control group. Daily drainage volumes, total amount of drainage, drain removal time, and seroma formation were recorded and compared between the two groups. The first-day drainage was significantly lower in the study group (p<0.05, Student's t-test). There were no significant differences in daily drainage volumes, drain removal time, seroma formation frequency, and the number of seromas between the two groups (p>0.05). In conclusion; fibrin glue application had no significant benefit on axillary lymphatic drainage, drain removal time, or seroma formation.     

Latissimus dorsi donor-site morbidity: the combination of quilting and fibrin sealant reduce length of drain placement and seroma rate

Seroma formation has been shown to be a multifactorial process in part due to dead space and the formation of raw surfaces, which produce large quantities of serous exudate. The purpose of this study is to evaluate the effect of quilting/progressive tension sutures (to reduce dead space) and fibrin sealant (to seal the raw surface) in combination on the seroma rate and length of drain placement in patients undergoing latissimus dorsi breast reconstruction. A retrospective review of 43 patients undergoing latissimus dorsi flap breast reconstruction was performed. The patients were divided into 2 groups: quilting sutures alone versus those with quilting sutures and fibrin sealant. Data regarding age, body mass index, smoking history, timing of reconstruction, type of breast surgery, radiation history, complications, length of drain placement, use of fibrin glue, and use of quilting/progressive tension sutures were collected for each patient. Results were analyzed statistically using unpaired t tests (P < 0.05). The quilting group included 19 patients with 24 donor sites. The mean drain placement duration was 21.5 days (range, 9-69 days). One patient in 19 developed a seroma, which was treated and resolved with aspiration. The seroma rate for the quilting only group was 5%. The quilting and sealant group included 23 patients with 26 donor sites. The quilting and sealant group had a mean duration of drain placement of 13.9 days (range, 6-38 days). This was a statistically reduced length of drainage (P = 0.04) compared with quilting only. The quilting and sealant group had 1 patient in 23 develop a seroma with a rate of 4% which compared with quilting only was not statistically significant (P = 0.4). The combination of quilting sutures and fibrin sealant directed at the 2 main mechanisms of seroma formation, (dead space and serous exudate, respectively) can decrease the duration of postoperative drain placement and does maintain low seroma rates.     

Effectiveness of fibrin glue in conjunction with collagen patches to reduce seroma formation after axillary lymphadenectomy for breast cancer

BACKGROUND: Axillary lymphadenectomy remains an integral part of breast cancer treatment, yet seroma formation occurs in 15% to 85% of cases. Among methods employed to reduce seroma magnitude and duration, fibrin glue has been proposed in numerous studies, with controversial results. METHODS: Fifty patients underwent quadrantectomy or mastectomy with level I/II axillary lymphadenectomy; a suction drain was fitted in all patients. Fibrin glue spray and a collagen patch were applied to the axillary fossa in 25 patients; the other 25 patients were treated conventionally. RESULTS: Suction drainage was removed between postoperative days 3 and 4. Seroma magnitude and duration were significantly reduced (P = .004 and .02, respectively) and there were fewer evacuative punctures in patients receiving fibrin glue and collagen patches compared with the conventional treatment group. CONCLUSIONS: Use of fibrin glue with collagen patches does not always prevent seroma formation, but it does reduce seroma magnitude and duration, as well as necessary evacuative punctures.     

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.     

医用胶在腹腔镜完全腹膜外疝修补术中减少术后血清肿的体会

目的探讨医用胶在腹腔镜完全腹膜外疝修补术（total extraperitoneal,TEP）中应用减少术后患者腹股沟区血清肿价值和意义。 方法回顾性分析2016年1月至2017年3月,南京中医药大学附属南京市中西医结合医院行TEP手术的60例患者临床资料,采用随机数字表法分为观察组（使用医用胶30例）和对照组（不使用医用胶30例）。观察比较2组患者术后血清肿发生率。 结果2组患者均手术顺利,均无近期复发。观察组术后血清肿发生率10%（3例）比对照组33.3%（10例）低,差异有统计学意义（P<0.05）。 结论医用胶在TEP中应用,对防止TEP术后发生血清肿的效果优良,减少患者痛苦,值得临床应用。     

Fibrin glue in gastroenteric surgery

In order to compare the results obtained in terminoterminal and terminolateral intestinal anastomoses using fibrin glue, both fibrin glue and the tissucol KIT were used on a group of rats: comparison of the wounds so treated revealed that both products gave good results. It is claimed that with certain technical improvements the use of fibrin glue could be extended to microsurgery of the nerves and blood vessels.     

Safety of the use of Tissucol Duo S in cardiovascular surgery: retrospective analysis of 2149 patients after coronary artery bypass grafting.

OBJECTIVE: Fibrin sealant is widely used in almost all fields of surgery and has proved to be an effective therapeutic tool in cardiothoracic surgery. Nevertheless, there have been concerns about early bypass graft occlusion associated with the use of fibrin glue. This analysis has been performed to assess the risks and benefits of Tissucol Duo S in coronary artery bypass grafting (CABG) surgery. METHODS: Two thousand one hundred forty-nine patients were included in this retrospective study, 879 (40.9%) were intra-operatively treated with Tissucol Duo S fibrin glue, 1270 (59.1%) did not receive fibrin glue (control group). Patient characteristics were documented according to the EuroScore. Intra- and postoperative data were collected. Primary endpoint of this study was the 30-day all-cause mortality rate in the Tissucol Duo S treated group compared to the control group. RESULTS: Mean age was 66.6+/-9.4 years, 76.3% of the patients were male. There was an increased 30-day-mortality rate in the Tissucol Duo S group compared to the control group (8.5 vs 3.5%, p<0.001). In order to determine if and to what extent the apparent fibrin effect might be due to confounding effects from covariates, an adjustment for potential confounding was done. However, multivariable adjustment did not reduce the risk of fibrin glue below an odds ratio of 2.2. CONCLUSION: Although the apparent increase in mortality risk associated with the use of fibrin glue could not be eliminated statistically, we consider Tissucol Duo S fibrin glue a safe and effective therapeutic tool in CABG surgery when it is applied correctly. Due to the retrospective character of this study some detailed information about the indication for the use of fibrin glue and its application is missing which may be important cofactors for mortality. For further clarification a prospective randomized study may be useful.     

Effect of fibrin glue on air leak and length of hospital stay after pulmonary lobectomy

AIM: Air leaks are a common cause of morbidity and prolonged hospital stay after pulmonary lobectomy. We reviewed our experience with intraoperative fibrin glue to determine if it reduced air leak and improved patient outcomes. METHODS: Records of patients undergoing pulmonary lobectomy for benign or malignant disease over a 4-year period (1998-2001) were reviewed. Data was collected on age, sex, pulmonary function, pulmonary pathology, use of fibrin glue, duration of chest tube drainage, length of hospital stay, and postoperative complications. RESULTS: Three hundred and sixty patients underwent lobectomy. Fibrin glue was used intraoperatively to seal air leaks in 102 of the 360 patients (study group: 102;control group: 258). Fibrin glue was used at the discretion of the surgeon, with some surgeons using it routinely. The groups did not differ in age (p=0.29), sex (p=0.42), FEV1 (p=0.57), or pathology (p=0.08). There were no differences in outcomes such as operative mortality (study: 2 of 102, control 6 of 258, p=0.85), empyema (study: 0 of 102, control: 3 of 258, p=0.55), prolonged (>7 days) air leaks (study: 10 of 20; control: 20 of 258, p=0.71), or length of hospital stay (study: 6.3+/-2.5 days, control:7.7+/-7.2 days, p=0.83). The use of fibrin glue was associated with a reduction in the duration of chest tube intubation (study: 4.1+/-3.2 days, control: 5.5+/-3.8 days, p=0.001). CONCLUSION: Patients treated intraoperatively with fibrin glue had a significantly shorter duration of chest tube intubation after pulmonary lobectomy than those treated conventionally. However, the use of fibrin glue did not significantly influence more clinically relevant outcomes such as length of hospital stay and incidence of prolonged (>7 days) air leaks.     

Experimental study of aneurysmal occlusion with fibrin glue]

The authors report an experimental trial of intra-aneurysmal occlusion using fibrin glue. Nowadays, with the development of microsurgical techniques and aneurysmal clips, results of direct radical operations have been improving. But quite a few aneurysms cannot be clipped because of their size, location, broad neck etc. Some authors have treated these aneurysms with innovative techniques (detachable balloon techniques etc). In these methods, the occlusive state of the aneurysms is not always obtainable because of the size of their neck. Besides, it is not always possible to preserve the parent arteries of the aneurysms. Experimental aneurysms in cervical carotid arteries of dogs are treated by direct injection with fibrin glue. During its injection, influx of fibrin glue was prevented by occlusion of the aneurysmal orifices with inflated polyethylene angioplastic balloons. The aneurysms which were completely (100%) filled by the injection of fibrin glue (100% infused group) were totally obliterated in 10 (71%) of the 14 cases. The parent arteries were completely preserved in all instances. Follow-up study demonstrated satisfactory maintenance of this occluded state in the aneurysms in the 100% infused group. In completely occluded cases, all aneurysms maintained this state. On the other hand, 1 of the 4 incompletely obliterated aneurysms recanalized partially. These occluded aneurysms were studied by a light microscope (LM) and a scanning electron microscope (SEM). At day 7 after the occluding procedure, the margin of the aneurysmal orifice was covered by a layer of fibroblasts. At day 21, almost half of the aneurysmal cavity had been substituted with connective tissue. The orifice of the aneurysms was covered with an endothelial layer.(ABSTRACT TRUNCATED AT 250 WORDS)     

Axillary lymphadenectomy for breast cancer in elderly patients and fibrin glue

Background

Axillary lymphadenectomy or sentinel biopsy is integral part of breast cancer treatment, yet seroma formation occurs in 15-85% of cases. Among methods employed to reduce seroma magnitude and duration, fibrin glue has been proposed in numerous studies with controversial results.

Methods

Thirty patients over 60 years underwent quadrantectomy or mastectomy with level I/II axillary lymphadenectomy; a suction drain was fitted in all patients. Fibrin glue spray were applied to the axillary fossa in 15 patients; the other 15 patients were treated with harmonic scalpel.

Results

Suction drainage was removed between post-operative Days 3 and 4. Seroma magnitude and duration were not significant in patients receiving fibrin glue compared with the harmonic scalpel group.

Conclusions

Use of fibrin glue does not always prevent seroma formation, but can reduce seroma magnitude, duration and necessary evacuative punctures.

     

The effect of fibrin sealant combined with fibrinolysis inhibitor on reducing the amount of lymphatic leakage after axillary evacuation in breast cancer. A prospective randomized clinical trial.

BACKGROUND AND AIMS: One third of women undergoing mastectomy with axillary evacuation for primary breast cancer suffer from postoperative seromas leading to unnecessary costs and complications such as infections and new operations. Different methods to prevent seroma formation have been tried without permanent success. The aim of this prospective randomised study was to examine the effect of fibrin sealant with fibrinolysis inhibitor firstly on the reduction of the amount of lymphatic leakage after axillary evacuation and secondly on the reduction of days with drains and postoperative seroma punctures. METHODS: 40 patients with primary breast cancer were prospectively randomised to the treatment group (n = 19) getting fibrin glue combined with fibrinolysis inhibitor (aprotinin) sprayed into the axillary fossa and to the control group (n = 21). RESULTS: There were no differences in the incidence of postoperative seromas between the groups. However, the seromas were easier to treat if fibrin clue was used. Total quantity (mean+/-SD) of lymphorrhea and total number of aspirations (mean+/-SD) were almost twice as high in the patients of the control group compared to those having fibrin sealant. In the treatment group seromas resolved after one or occasionally after two aspirations in 71 % of patients, while in the control group 90 % of patients needed three or more aspirations. CONCLUSION: Potentially, fibrin sealant combined with fibrinolysis inhibitor might be used for the treatment of post- axillary evacuation lymphorrhea and seroma.     

Decreased wound contraction with fibrin glue--treated skin grafts.

Skin grafts can be used effectively to inhibit wound contraction. A critical element of this inhibition is the adherence of the graft to the wound bed. Fibrin glue has been shown to increase the adherence of skin grafts to wound beds. We therefore devised an experiment to determine the effect of fibrin glue on skin graft inhibition of wound contraction. Two 2.5 x 2.5-cm full-thickness defects were created on the dorsa of 15 Sprague-Dawley rats. Thirty partial-thickness grafts were harvested from isogeneric donor animals using a brown dermatome. Prior to grafting, one full-thickness defect, each animal received 0.2 mL of fibrin glue (Immuno AG, Vienna, Austria). The adjacent wound served as the control and received 0.2 mL of normal saline. Grafts were applied, sutured, and protected with an occlusive dressing. The size of graft sites treated with fibrin glue or normal saline was determined at the time of graft application and thereafter at 3-day intervals for 21 days using standardized photographic techniques. The percentage of change from initial wound size at each point was recorded for each group. Graft sites treated with fibrin glue contracted less than the controls from the ninth postgraft day to the completion of the study. The mechanism by which fibrin glue inhibits wound contraction may be related to increased adherence of grafts to the underlying wound bed. As an adjunct in skin grafting, fibrin glue may offer certain advantages that are not achieved by suturing alone.     

An in vitro and in vivo analysis of fibrin glue use to control bone morphogenetic protein diffusion and bone morphogenetic protein-stimulated bone growth.

BACKGROUND CONTEXT: Recombinant human bone morphogenetic protein-2 (rh-BMP2) has become popular for augmenting spine fusion in the lumbar and cervical spine. Concerns exist, however, over bone morphogenetic protein (BMP)-stimulated soft-tissue swelling and bone growth stimulation in areas where bone is not desired, especially as the material "leaks" into such spaces. The most detrimental effects of such leakage might be airway compromise, while heterotopic bone formation into the spinal canal has been reported in animal and human studies. Fibrin glue has been used as a carrier of many osteoinductive materials; however, its efficacy at modulating the clinical effects of BMP are not known. The amorphous nature of fibrin glue makes it a candidate to control diffusion of BMP and possibly limit bone formation by limiting BMP diffusion to areas where such bone is not desired. PURPOSE: To evaluate the use of fibrin glue to limit BMP diffusion and BMP-stimulated bone growth. STUDY DESIGN/SETTING: This is an in vitro basic science study and an in vivo prospective randomized animal study. STUDY SAMPLE: Eighteen Lewis rats. OUTCOME MEASURES: In vitro study: Enzyme-linked immunosorbent assay measurement of rh-BMP2 concentration in saline. In vivo study: At day 60, rats were evaluated for neurologic deficits before sacrifice. Spines were harvested, and the following studies were performed: 1) manual testing for fusion and bone growth; 2) X-ray evaluation; 3) Micro-computed tomography (micro-CT) scans. METHODS: In vitro study: Collagen sponges soaked with BMP at two different concentrations were incubated in saline solution with and without encapsulation by fibrin glue. Saline BMP concentrations were measured at consecutive time points. In vivo study: A rat fusion model using rh-BMP2 for fusion has been developed and tested with resultant100% fusion in over 100 rats. Lewis rats were divided into two groups and treated as follows: I: Exposure of L4-L5 transverse processes, decortication, and placement of BMP sponge in the lateral intertransverse space. II: Exposure and decortication as above and placement of fibrin glue before BMP sponge placement. RESULTS: In vitro study: Peak rh-BMP2 concentrations in saline were 20% and 45% of the maximum possible for fibrin glue encapsulated sponges and controls, respectively, with a more gradual increase to peak concentration in samples encapsulated in fibrin glue. In vivo study: No rats exhibited any neurologic deficits. X-rays revealed at least partial bone formation in all rats. Manual testing of intertransverse fusion spines revealed 100% fusion in rats treated with BMP only, whereas rats treated with fibrin glue before placement of BMP sponges revealed only one possible fusion. Posterior-lateral bone formation was present on X-ray in both groups, and micro-CT imaging revealed bridging bone from transverse processes to the BMP-stimulated bone in the control groups. In spines treated with fibrin glue before rh-BMP2 placement, bone formation could still be seen within the soft tissues; however, bridging bone connecting to the transverse processes was either significantly decreased or not present. CONCLUSIONS: Fibrin glue can limit rh-BMP2 diffusion. Also, because it limited bone formation at the transverse processes, it can be inferred that fibrin glue can limit bone formation when used to separate areas of desired bone formation from areas where bone formation is not desired.     

Prevention of Subcutaneous Seroma Formation in Open Ventral Hernia Repair Using a New Low-Thrombin Fibrin Sealant

Background

Seroma formation is a frequent postoperative complication following open ventral hernia repair (OVHR), especially in cases requiring wide subcutaneous dissection (WSD). The aim of this study was to evaluate the effectiveness of a new low-thrombin fibrin sealant for seroma prevention.

Methods

A total of 60 consecutive patients with median incisional hernias who required OVHR with WSD of at least 100 cm² were included in the prospective non-randomized study. The fibrin glue group (FG) comprised 30 patients who had undergone OVHR with sublay mesh placement as well as subcutaneous application of low-thrombin fibrin sealant. This cohort of patients was compared with a control group (CG) of 30 consecutive patients who had previously undergone OVHR without prevention of seroma formation with regard to outcome measures such as seroma formations and wound complications.

Results

Though the median extent of subcutaneous dead space was larger in the FG than in the CG (229 vs.174 cm²; p = 0.012), seroma formation occurred in three of the FG versus 16 of the CG patients (p = 0.003). Postoperative wound complications occurred in two of the FG versus nine of the CG patients (p = 0.002). Four patients in the CG and none in the FG required re-operation within 30 days (p < 0.001).

Conclusion

The use of a new low-thrombin fibrin glue demonstrated a protective effect against formation of seromas and decreased the rate of wound complications in OVHR, with consecutive shorter length of hospital stay (5.8 vs. 10.4 days; p = 0.04).     

前脂肪细胞凝胶植入预防腰椎术后硬膜外腔瘢痕粘连的实验研究

目的：探讨自体前脂肪细胞凝胶植入法预防腰椎术后硬膜外腔瘢痕粘连的效果。方法：将60只SD大鼠随机分为A组(前脂肪细胞凝胶植入组)、B组(自体脂肪颗粒植入组)、C组(空白对照组)，将A组动物先进行前脂肪细胞培养，待其脂肪细胞培养传代至适量后，制备各组大鼠的椎板缺损模型，A组取培养的单层脂肪细胞与生物蛋白胶制成混合物，B组取自体脂肪颗粒分别植入椎板缺损区，C组不植入任何物质，于术后8周行大体、光镜、电镜及MRI检查。结果：A组预防硬膜外腔瘢痕粘连效果良好，优于B组。结论：自体前脂肪细胞与生物蛋白胶制成的混合物植入预防硬膜外腔瘢痕的形成与粘连有良好的效果，是一种预防椎板切除术后硬膜外腔瘢痕形成与粘连的新方法。     

Comparative study of different biological glues in an experimental model of surgical bleeding in anesthetized rats: Platelet-rich and -poor plasma-based glue with and without aprotinin versus commercial fibrinogen-based glue

The use of fibrin glue in cardiovascular surgery has been associated with decreased operative time, effective control of localized bleeding, and reduced postoperative blood loss. All preparations of fibrin glue mimic the final common pathway of the coagulation cascade in which fibrinogen is converted to fibrin in the presence of thrombin and calcium. The goal of the study was to compare five different types of fibrin glue, with or without aprotinin, on a surgical bleeding model in the rat. In 70 anesthetized Wistar rats, after laparotomy, a 3 cm liver incision was performed. After randomization, seven groups were studied. In the first group, Biocol® was used as a pinpoint application to the bleeding site. Four groups received a fibrin glue obtained from a single human donor plasma using Cell Saver V (Haemonetics). The sealant was applied as a two-component system. The first component of the glue was either platelet-rich-plasma (PRP) or platelet-poor-plasma (PPP). The second component consisted of a mixture of 0.5 ml CaCl 10% with 1000 U of human thrombin, with or without 400KUI of aprotinin (AP). The last two groups, control and aprotinin were treated using saline solution or topical aprotinin respectively. Hemoglobin and hematocrit were measured before surgery and 30 min after application of the glue. The decrease in hemoglobin (Hb) and hematocrit (Hct) was the primary efficacy variable. Before surgery, there was no difference regarding Hb and Hct values between groups. Thirty min after the application of the glue, the decrease in hemoglobin expressed as percent of the control values is only significantly lower in the Biocol group when compared to control. No significant difference was observed with the other groups in comparison to control. The commercial fibrin glue (Biocol) is more efficient than other preparations. This efficacy is likely due to a higher fibrinogen concentration.     

Evaluation of a fibrin sealant free of bovine-derived components in an experimental vas anastomosis study

OBJECTIVES: The risk of transmission of bovine spongiform encephalopathy cannot be excluded from the use of bovine-derived products. The present study was undertaken to evaluate the performance of a new fibrin glue free of bovine-derived components in vas anastomosis and to compare this product to conventional vas anastomosis with fibrin glue. METHODS: Bilateral delayed vas anastomosis was performed in 40 Sprague-Dawley rats. All animals underwent a fibrin glue-assisted vas anastomosis with three transmural sutures tied prior to fibrin glue application. The composition and preparation of fibrin glue was similar for all vas anastomoses except the fibrinolysis inhibitor component which was aprotinin (3,000 KUI/ml) in group 1 and tranexamic acid (10 mg/ml) in group 2. The animals (20 rats in both groups) were sacrificed 7 weeks postoperatively and evaluated for gross patency, presence of sperm granuloma and tensile strength measurements at the anastomosis site. RESULTS: No difference was found between the 2 groups for all parameters evaluated whether a bovine-derived or a synthetic fibrinolysis inhibitor component was used. CONCLUSION: This study showed that tranexamic acid, a fibrinolysis inhibitor, can be substituted for conventional fibrin glue thereby avoiding the risks of bovine products.