Staple Line Reinforcement During Laparoscopic Sleeve Gastrectomy: Absorbable Monofilament, Barbed Suture, Fibrin Glue, or Nothing? Results of a Prospective Randomized Study

Safety and Efficacy of Barbed Sutures Compared to Non-barbed Sutures in Bariatric Surgery: An Updated Systematic Review and Meta-analysis

PURPOSE

Mastering intracorporeal suturing is challenging in the evolution from conventional to laparoscopic bariatric surgery. Among various techniques competing for superiority in overcoming this hurdle, we focus on exploring the potential of barbed sutures through a meta-analysis that compares outcomes to those of conventional non-barbed sutures in bariatric surgery.

MATERIALS AND METHODS

We conducted a comprehensive search on PubMed, Scopus, and Embase to identify studies comparing barbed sutures with non-barbed sutures in bariatric surgeries, focusing on outcomes such as operative time, suturing time, postoperative complications, and hospital stay. The statistical analysis was carried out using RStudio version 4.3.2. Heterogeneity was assessed using the Cochrane Q test and I2 statistics.

RESULTS

Incorporating data from 11 studies involving a total of 27,442 patients, including 3,516 in the barbed suture group across various bariatric surgeries, our analysis demonstrates a significant reduction in suturing time (mean difference -4.87; 95% CI -8.43 to -1.30; p < 0.01; I2 = 99%) associated with the use of barbed sutures. Specifically, in Roux-en-Y gastric bypass, we observed a significant decrease in operative time (mean difference -12.11; 95% CI -19.27 to -4.95; p < 0.01; I2 = 93%). Subgroup analyses and leave-one-out analyses consistently supported these findings. Furthermore, we found that the mean body mass index did not significantly predict the mean difference in operative time outcome. No significant differences emerged in hospital stay or postoperative complications, including leak, bleeding, stenosis, and bowel obstruction (p > 0.05).

CONCLUSION

Our study findings address barbed sutures as a potential alternative for laparoscopic intracorporeal suturing in bariatric surgery.

Endoscopic Management of Post-Sleeve Gastrectomy Complications

Obesity is associated with several chronic conditions including diabetes, cardiovascular disease, and metabolic dysfunction-associated steatotic liver disease and malignancy. Bariatric surgery, most commonly Roux-en-Y gastric bypass and sleeve gastrectomy, is an effective treatment modality for obesity and can improve associated comorbidities. Over the last 20 years, there has been an increase in the rate of bariatric surgeries associated with the growing obesity epidemic. Sleeve gastrectomy is the most widely performed bariatric surgery currently, and while it serves as a durable option for some patients, it is important to note that several complications, including sleeve leak, stenosis, chronic fistula, gastrointestinal hemorrhage, and gastroesophageal reflux disease, may occur. Endoscopic methods to manage post-sleeve gastrectomy complications are often considered due to the risks associated with a reoperation, and endoscopy plays a significant role in the diagnosis and management of post-sleeve gastrectomy complications. We perform a detailed review of the current endoscopic management of post-sleeve gastrectomy complications.

How Does Oversewing/Suturing (OS/S) Compare to Other Staple Line Reinforcement Methods? A Systematic Review and Meta-Analysis

Various staple line reinforcement (SLR) techniques in sleeve gastrectomy, including oversewing/suturing (OS/S), gluing, and buttressing, have emerged to mitigate postoperative complications such as bleeding and leaks. A meta-analysis of randomized controlled trials has demonstrated OS/S as an efficacious strategy for preventing postoperative complications, encompassing leaks, bleeding, and reoperations. Given that OS/S is the sole SLR technique not incurring additional costs during surgery, our study aimed to compare postoperative outcomes associated with OS/S versus alternative SLR methods. Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, we reviewed the literature and conducted fifteen pairwise meta-analyses of comparative studies, each evaluating an outcome between OS/S and another SLR technique. Thirteen of these analyses showed no statistically significant differences, whereas two revealed notable distinctions.

Oversewing/Suturing of the Staple Line During Sleeve Gastrectomy Is an Effective and Affordable Staple Line Reinforcement Method: a Meta-analysis of Randomized Controlled Trials

Bleeding and leaks are the most ominous postoperative complications after laparoscopic sleeve gastrectomy (LSG). Various staple line reinforcement (SLR) techniques have been innovated such as oversewing/suturing (OS/S), omentopexy/gastropexy, buttressing, and gluing. Currently, no high-quality evidence supports the use of one method over the others or even supports the use of SLR over no SLR. This study aimed to compare postoperative outcomes between LSG with OS/S versus LSG without any SLR.

The clinical effectiveness of staple line reinforcement with different matrix used in surgery

Staplers are widely used in clinics; however, complications such as bleeding and leakage remain a challenge for surgeons. To tackle this issue, buttress materials are recommended to reinforce the staple line. This Review provides a systematic summary of the characteristics and applications of the buttress materials. First, the physical and chemical properties of synthetic polymer materials and extracellular matrix used for the buttress materials are introduced, as well as their pros and cons in clinical applications. Second, we review the clinical effects of reinforcement mesh in pneumonectomy, sleeve gastrectomy, pancreatectomy, and colorectal resection. Based on the analysis of numerous research data, we believe that buttress materials play a crucial role in increasing staple line strength and reducing the probability of complications, such as bleeding and leakage. However, considering the requirements of bioactivity, degradability, and biosafety, non-crosslinked small intestinal submucosa (SIS) matrix material is the preferred candidate. It has high research and application value, but further studies are required to confirm this. The aim of this Review is to provide comprehensive guidance on the selection of materials for staple line reinforcement.

Battle of the buttress: 5-year propensity-matched analysis of staple-line reinforcement techniques from the MBSAQIP database

BACKGROUND

Vertical sleeve gastrectomy (VSG) has demonstrated to be safe; however, controversy remains on how to decrease major complications, particularly bleeding and leaks. There are variations in staple-line reinforcement techniques, including no reinforcement, oversewing, and buttressing. We sought to evaluate the effect of those methods on post-operative complications using the Metabolic and Bariatric Surgery Accreditation Quality Initiative Program (MBSAQIP) database.

METHODS

The MBSAQIP was queried for patients who underwent VSG during 2015-2019. A propensity-matched analysis was performed between different staple-line reinforcement (SLR) methods, specifically No reinforcement (NR), Oversewing (OS), and Buttressing (BR). The primary outcome of interest was complications within 30 days.

RESULTS

A total of 513,354 VSG cases were analyzed. The cohort was majority female (79.0%), with mean (SD) age of 44.2 ± 11.9 years and mean BMI of 45 ± 7.8 kg/m². Frequency of SLR methods used was 54%BR, 25.6%NR, 10.8% BR + OS, and 9.8%OS. There were no differences in rate of leaks among SLR methods. Compared to NR, BR was associated with decreased rate of reoperations, overall bleeding, and major bleeding (p < 0.05) but prolonged operative time and length of stay (LOS) (p < 0.05). OS was associated with decreased overall bleeding (p < 0.05) but prolonged operative times and length of stay (p < 0.05) compared to NR. Compared to BR, OS was associated with increased operative times, LOS, and rates of post-operative ventilator use, pneumonia, and venous thrombosis (p < 0.05). Patients with bleeding were associated with lower rate of BR (56% vs 61%) and higher rate of NR (34% vs 28%) compared to patients with no bleeding. Bleeding was associated with a greater frequency of leaks (4.4% vs 0.3%), along with higher morbidity and mortality (p < 0.05).

CONCLUSIONS

Of the reinforcement methods evaluated, BR and OS were both associated with decreased bleeding despite longer operative times. No method was found to significantly reduce incidence of leaks; however, bleeding was associated with increased incidence of leaks, morbidity, and mortality. The liberal use of SLR techniques is recommended for further optimization of patient outcomes after VSG.

Bioabsorbable Glycolide Copolymer is Effective in Reducing Staple Line Bleeding in Sleeve Gastrectomy

BACKGROUND

Postoperative bleeding from the staple line after sleeve gastrectomy occurs in 2-8% of patients and it is associated with increased length and cost of hospitalization and may demand reoperation to gain hemostasis. Reinforced staplers are used by bariatric surgeons to reduce the incidence of postoperative leak but can have a role in avoiding bleeding. The aim of this study is to analyze the effects of reinforcement on the whole gastric staple line during sleeve gastrectomy on postoperative bleeding.

METHODS

Four hundred forty-eight consecutive patients undergoing sleeve gastrectomy from November 2012 to April 2019 were divided into two groups. In the Top-only group only the top staple shot was realized with reinforced material (GORE® SEAMGUARD®) while in the Bottom-to-Top group, patients received full staple line reinforcement. Statistical analysis focused on postoperative leak and bleeding, and length of stay; a propensity score matching analysis was performed to reduce between-group characteristics imbalance.

RESULTS

One hundred forty-five (Top-only) and 303 (Bottom-to-Top) patients were included. Four (2.8%) patients in the Top-only group and none in the Bottom-to-Top group experienced severe bleeding (p = 0.004); the difference was still significant after propensity score matching. Length of stay was significantly shorter for the Bottom-to-Top group before and after propensity score matching (4 vs. 5 days, p < 0.001).

CONCLUSIONS

Staple line buttressing reduces the incidence of severe postoperative bleeding when performed on the whole staple line, and it is associated with a shorter hospitalization.

Comparison of Laparoscopic Sleeve Gastrectomy Bleeding and Leakage Rates in Four Staple-Line Reinforcement Methods: A Prospective Observational Study

Introduction: Staple-line bleeding and gastric leakage are the most serious complications of laparoscopic sleeve gastrectomy (LSG). Reinforcement of the staple line is reported to be a method to reduce these complications rates, but the question of which method is preferable is a matter of controversy in the literature. In this study, we compared different staple-line reinforcement methods to assess their efficiency in preventing staple-line bleeding and leakage. Materials and Methods: Two hundred patients eligible for LSG were enrolled in the study and randomized into five groups based on the reinforcement method used during surgery: no reinforcement, oversewing using 3-0 polydioxanone (PDS) suture, oversewing using 4-0 barbed absorbable closure device (V-Lock), fibrin sealant glue, and buttress material. Intraoperative and postoperative complications were recorded and analyzed. Differences were considered statistically significant for P < .05. Results: The no-reinforcement group showed higher bleeding rates (20%), although only 2.5% of the patients required reintervention. All groups using staple-line reinforcement showed better outcomes in bleeding rates (P < .05). No statistically significant differences were observed among the groups in terms of the leakage rate, reintervention rate, intraoperative complications, and operative times. Conclusion: The reinforcement of the staple line decreased the bleeding rate in sleeve gastrectomy but did not affect the gastric leakage rate.

Staple Line Reinforcement During Laparoscopic Sleeve Gastrectomy: Systematic Review and Network Meta-analysis of Randomized Controlled Trials

Purpose

Staple line reinforcement (SLR) during laparoscopic sleeve gastrectomy (LSG) is controversial. The purpose of this study was to perform a comprehensive evaluation of the most commonly utilized techniques for SLR.

Materials and Methods

Network meta-analysis of randomized controlled trials (RCTs) to compare no reinforcement (NR), suture oversewing (SR), glue reinforcement (GR), bioabsorbable staple line reinforcement (Gore® Seamguard®) (GoR), and clips reinforcement (CR). Risk Ratio (RR), weighted mean difference (WMD), and 95% credible intervals (CrI) were used as pooled effect size measures.

Results

Overall, 3994 patients (17 RCTs) were included. Of those, 1641 (41.1%) underwent NR, 1507 (37.7%) SR, 689 (17.2%) GR, 107 (2.7%) GoR, and 50 (1.3%) CR. SR was associated with a significantly reduced risk of bleeding (RR=0.51; 95% CrI 0.31–0.88), staple line leak (RR=0.56; 95% CrI 0.32–0.99), and overall complications (RR=0.50; 95% CrI 0.30–0.88) compared to NR while no differences were found vs. GR, GoR, and CR. Operative time was significantly longer for SR (WMD=16.2; 95% CrI 10.8–21.7), GR (WMD=15.0; 95% CrI 7.7–22.4), and GoR (WMD=15.5; 95% CrI 5.6–25.4) compared to NR. Among treatments, there were no significant differences for surgical site infection (SSI), sleeve stenosis, reoperation, hospital length of stay, and 30-day mortality.

Conclusions

SR seems associated with a reduced risk of bleeding, leak, and overall complications compared to NR while no differences were found vs. GR, GoR, and CR. Data regarding GoR and CR are limited while further trials reporting outcomes for these techniques are warranted.

Graphical abstract

Supplementary Information

The online version contains supplementary material available at 10.1007/s11695-022-05950-z.

Staple line reinforcement with nebulized cyanoacrylate glue in laparoscopic sleeve gastrectomy: A propensity score-matched study

Background

A dreaded complication of laparoscopic sleeve gastrectomy (LSG) is suture leak. The study aimed to assess the efficacy of the nebulized comonomer Glubran 2^® (N-butyl-cyanoacrylate + metacrylosysolfolane) applied to the LSG staple line.

Methods

A propensity-matched comparison analysis was conducted in 125 patients undergoing LSG between 2017 and 2019. Groups included those treated with Glubran^® (group 1, n = 70) and those without Glubran^® treatment (group 2, n = 55).

Results

There were differences in the mean body mass index (44.4 vs 43 kg/m²; P < 0.05) between the groups. There was a non-significant increase in the operative time for group 1 compared with group 2 (97 ± 8 vs 93.8 ± 10.7 min; P = 0.07), with a greater amount of estimated blood loss (94.5 mL vs 87.8; P < 0.01). There were more severe complications in group 2 over group 1 cases (8 vs 0%; P < 0.05), although postoperative bleeding did not differ between the two groups (1.4 vs 5.4%). There were no postoperative leaks in group 1 patients, but there were two leaks in group 2 cases with an increased length of hospital stay in patients with a leak.

Conclusion

Glubran^® LSG support may reduce leak risk without increasing operating time.

Remodifying Omentopexy Technique Used with Laparoscopic Sleeve Gastrectomy: Does It Change any Outcomes?

BACKGROUND

Gastric obstructions, leaks and staple line bleeding are reported after laparoscopic sleeve gastrectomy (LSG). There is no ideal method or technique to avoid these mishaps. We added modified omentopexy (OP) to LSG to determine if there is any effect on gastric leaks and some other complications.

METHODS

This single institution case control study included two groups of morbidly obese patients undergoing LSG. They were grouped as omentopexy (OP) or no omentopexy (NP). Patient characteristics such as age, sex, ASA (American Society of Anesthesiologists) risk, body mass index (BMI), nutritional status and comorbidities were comparable. Postoperative follow-up was scheduled at 1 week, 1 month, 3 months, 6 months and 12 months. All received standard postoperative clinical, nutritional evaluation and PPI therapy for at least 3 months.

RESULTS

Total 737 patients underwent LSG from January 2012 to December 2017. Out of these, 370 that had OP and 367 that had NP were analyzed. NP group was subdivided into Lemberted Staple line (LS) and bioabsorbable staple line reinforcement (BSLR) groups. Gastric leaks and perforations were clubbed together as gastric disruptions (GD). Patients with at least 15 months of postoperative follow-up were included. Those who failed to follow up were excluded. GD was reported in 7 out of 367 NP patients (1.9%), while no GD was seen in 370 OP patients (P = 0.01). Bleeding was seen in 1 OP versus 2 NP patients (P = 0.6). Venous thromboembolism was reported in 2 OP versus 1 NP patients (P = 1). Wound infection was seen in 1 OP versus 2 NP patients (P = 0.6). Readmissions were noted in 2 OP versus 6 NP patients (P = 0.1). Pneumonia was seen in 2 OP and 2 NP patients (P = 1). Postoperative dehydration was seen in zero OP versus 1 NP patients (P = 0.4). Gastric obstruction was not seen in any of the patients. Postoperative gastric reflux was present in 49/370(13.2%) OP versus 57/367(15.4%) NP patients (P = 0.4). Within NP group, LS (Lemberting of Staple line) patients (286/367) had 4 GD (1.39%) versus no GD in OP (P = 0.03). BSLR (Bioabsorbable Staple line re-enforcement) patients (81/367) had 3 GD (3.7%) versus no GD in OP (P = 0.005). None of the groups had any mortality.

CONCLUSIONS

GD (gastric disruptions) were statistically significant, but the following bleeding, venous thromboembolism and gastroesophageal reflux did not reach statistical significance, which indicates that OP, if performed correctly with LSG, has favorable effects on gastric leaks.

Staple-line reinforcement using barbed sutures in 1008 sleeve gastrectomies

Purpose

Among various staple-line reinforcement methods applied during sleeve gastrectomy (SG), although data on full-thickness-continuous-suturing (FTCS) is nearly nil, it has been considered as potentially harmful. The safety/efficacy profile of FTCS is assessed.

Methods

All consecutive SGs completing 3-month follow-up were studied. Data on peri-operative parameters, complications, and follow-up were prospectively recorded. All reinforcements were completed by FTCS utilizing barbed suture. Super-super obese, secondary SGs, SGs performed in patients with prior anti-reflux surgery, and SGs performed with additional concomitant procedures were evaluated as “technically demanding” SGs. Student’s t/chi-square tests were used as appropriate.

Results

Between January 2012 and July 2020, 1008 SGs (941 “primary-standard,” 67 “technically demanding”) were performed without mortality/venous event. Single leak occurred in a patient with sleeve obstruction (0.1%). Thirteen bleedings, 4 requiring re-surgery (0.4%), and 17 stenoses (1.7%) were encountered. Four stenoses were treated with gastric bypass (1 emergency), 6 by dilatation(s), and one required parenteral nutrition. Six patients with stenosis chose not to have any treatment. No statistically significant difference was observed in postoperative complications between “primary-standard” and “technically demanding” SGs (p > 0.05). The median follow-up was 44 months. The excess weight loss % at 5th year was 80.1%. Suturing added 28.4 ± 6 minutes to the SG, 3 or fewer sutures were used to complete the reinforcement in > 95%. No mishap/complication occurred related to suturing.

Conclusion

FTCS produced excellent result in terms of leakage/hemorrhage with an acceptable stenosis rate at a low cost with half-an-hour increase in the operating time. In contrast to previous allegations, no harm attributable to stitching itself occurred.

Supplementary Information

The online version contains supplementary material available at 10.1007/s00423-021-02161-5.

Barbed suture in gastro-intestinal surgery: A review with a meta-analysis

BACKGROUND

The laparoscopic approach is a very popular technique for many gastrointestinal operations and barbed sutures may improve the difficulties of intracorporeal anastomosis by eliminating the need for knot tying. The aim of this systematic review with a meta-analysis is to explore literature to establish the security profile of barbed suture compared with conventional laparoscopic sutures.

MATERIALS AND METHODS

A systematic search was performed in all electronic databases (PubMed, Web of Science, Scopus, EMBASE) and 12 studies were included in the analysis, involving 27,133 patients, whereof 3372 cases (patients undergone barbed suture usage) and 23,761 controls (patients undergone conventional suture usage). We found 3 studies discussing differences between barbed and conventional sutures in colorectal surgery and 8 studies presenting results in bariatric surgery, both in Roux-en-y gastric bypass and Mini Gastric/One Anastomosis Gastric Bypass.

RESULTS

We found comparable rate of leaks, bleedings and stenosis. The meta-regression analysis demonstrated that, both in case of bariatric and colorectal surgery, the demographic characteristic of patients and the oncological features of neoplasms did not impact of these findings. As expected, operative time is significantly shorter when barbed suture is used.

CONCLUSION

Our analysis on current literature define an acceptable security profile for barbed suture with effective results particularly in terms of shorter operative time.

Efficacy of Fibrin Sealant in Reducing Complication Risk After Bariatric Surgery: a Systematic Review and Meta-analysis

BACKGROUND

Complications including staple-line leakage and bleeding may occur after sleeve gastrectomy and Roux-en-Y gastric bypass. In this meta-analysis, the efficacy of fibrin sealant in strengthening the staple line and reducing complication risk after bariatric surgery was evaluated.

METHODS

We searched PubMed, Embase, and Cochrane Library databases for randomized controlled trials (RCTs) published up to October 2020. Pooled estimates of the outcomes were computed using a random effects model. The primary outcomes were bleeding and leakage; secondary outcomes were gastric stricture, length of hospital stay, reoperation rate, and total operation time.

RESULTS

In total, 9 RCTs including 2136 patients were reviewed. Our meta-analysis revealed that compared with controls, fibrin sealants decreased incidence of bleeding significantly (risk ratio [RR] = 0.42; 95% confidence interval [CI], 0.18-0.97), but did not demonstrate significant differences in reducing the incidence of leakage (RR = 0.62; 95% CI, 0.23-1.73), gastric stricture (RR = 1.16; 95% CI, 0.46-2.91), reoperation rate (RR = 0.85; CI, 0.14-5.14), or length of hospital stay (weighted mean difference = 0.62; 95% CI, - 0.31 to 1.55). Compared with oversewing, fibrin sealant use reduced the operation time; however, their efficacies in reducing the incidence of postoperative bleeding and leakage did not differ significantly.

CONCLUSIONS

Although applying fibrin sealants to the staple line in bariatric surgery may provide favorable results, but it may not reduce postoperative leakage and stricture incidence significantly. Nevertheless, the application of fibrin sealants as a method for reducing risks of complications after bariatric surgery warrant further investigation.

Efficacy of Staple Line Reinforcement With Omentopexy During Laparoscopic Sleeve Gastrectomy on Postoperative Complications: Experience of a Single Center

BACKGROUND

The aim of this study was to evaluate the protective effects of staple line reinforcement with omentopexy during laparoscopic sleeve gastrectomy on postoperative complications.

MATERIALS AND METHODS

A total of 3942 laparoscopic sleeve gastrectomy cases were included in the study. All the patients were divided into 3 groups: No reinforcement (NoSLR), staple line reinforcement with fibrin glue (SLR-FG), and staple line reinforcement with omentopexy (SLR-O). Demographic data and perioperative characteristics of the groups were analyzed retrospectively. Among these, age, sex, preoperative comorbidities, American Society of Anesthesiologists scores, body mass index, duration of operation, reoperation, complications, and Clavien-Dindo classification scores were recorded.

RESULTS

Age, sex, body mass index, comorbid diseases, American Society of Anesthesiologists, and Clavien-Dindo Classification scores were similar in all the groups. The overall complication rate was 3.0%. The overall minor and major complication rates were 1.7% and 1.3%, respectively. The mortality rate was 0.1% (4 patients). The most common postoperative complications were bleeding (0.9%) and leakage (0.5%). The incidence of leakage, bleeding, and twisted gastric sleeve rates were similar when compared between SLR-FG and NoSLR. In the SLR-O patients, the incidence of leakage, hemorrhage, and twist were significantly lower and the operation time was significantly longer when compared with the other groups.

CONCLUSIONS

The SLR-O technique, especially when performed by experienced surgeons, is a promising method for the prevention of postoperative leakage, bleeding, and twist complications with an acceptable increase in the duration of operation. Considering the limited effects of the SLR-FG technique, it was predicted that it would lose its popularity over time.

Use of fibrin glue in bariatric surgery: analysis of complications after laparoscopic sleeve gastrectomy on 450 consecutive patients

Laparoscopic Sleeve Gastrectomy (LSG) is one of the most performed surgical procedures in bariatric surgery. Staple line leak and bleeding are by far the two most feared complications after LSG. In this study, we retrospectively compared the efficacy of Fibrin Glue in preventing staple line leak and bleeding. From September 2019 to January 2020, 450 obese patients underwent elective LSG and were placed into groups with Fibrin Glue reinforcement (Group A) or without Fibrin Glue reinforcement (Group B). Primary endpoints were postoperative staple line leak and bleeding; while, secondary endpoints were reintervention rate, total operative time and mortality. Mean Body Mass Index (BMI) was 45.4 ± 7.9 kg/m² (range: 35.1-81.8). Mean age was 43.3 ± 11.8 years (range: 18-65). No intraoperative complications or conversion to laparotomy were reported. Mean operative time was comparable between the groups (48 ± 18 min in Group A vs 48 ± 14 min in Group B; p > 0.05). No decrease in overall postoperative complications was found in Group A (5.1% vs 7.0%; p > 0.05), but after stratification according to Clavien-Dindo classification, we found a higher rate of Grade II (0.0% vs 1.6%; p < 0.05) and Grade IIIb (0.0% vs 1%; p < 0.05) complications in group B. Our study showed that Fibrin Glue as a reinforcement method during LSG is a reliable tool, without affecting the operative time of surgery and mortality. A significant reduction in complications (Clavien-Dindo grade II and grade IIIb) was observed in patients undergoing LSG with Fibrin Glue.

Is There Necessity for Oversewing the Staple Line During Laparoscopic Sleeve Gastrectomy? An Updated Systematic Review and Meta-Analysis of Randomized Controlled Trials

Background: Laparoscopic sleeve gastrectomy (LSG) has become the current mainstream surgical treatment for obesity. With the development of clinical practice, surgeons realized the associated severity and danger of postoperative bleeding and leakage. Surgeons constantly explore different strategies to reduce the incidence of these complications. By reviewing previous clinical articles on the staple line reinforcement (SLR) in LSG, the conclusions were inconsistent regarding effectiveness. This article aims to discuss effectiveness of oversewing the staple line in LSG. Methods: From the start date of each database to September 27, 2018, a comprehensive search of published articles in English was conducted in PubMed, Embase, Central (Cochrane) databases and Scopus databases. We extracted and analyzed the main results on postoperative bleeding, staple line leakage, hospital stay and operative time of the final included articles. This review was compliant with PRISMA guidelines. Results: Finally, we extracted and analyzed 11 randomized controlled trials (RCTs) which contain 2411 patients (1219 patients as part of the oversewing (OS) group and 1192 patients in the no-oversewing (NOS) group). In the OS group, there were 15 cases (1.23%) of postoperative bleeding, and 8 cases (0.66%) of postoperative leakage. While in the NOS group, 35 patients (2.94%) had postoperative bleeding and 21 patients (1.76%) had postoperative leakage. By comparing and analyzing the OS group and the NOS group, the risk ratio (RR) for postoperative bleeding was 0.48 (95% confidence interval [CI], 0.27-0.83 p = 0.447). In addition, the RR for postoperative leakage was 0.44 (95% CI, 0.21-0.89 p = 0.835). The standardized mean difference (SMD) for hospital stay was -0.10 (95% CI, -0.25 to 0.04 p = 0.061) and 2.26 for operative time (95%CI, 0.82-3.69 p = 0.000). Conclusion: This study suggested that oversewing the staple line during LSG has a significant clinical value: it decreased the incidence of postoperative bleeding, postoperative leakage; moreover, it also significantly prolonged the operative time and but did not change hospital stay. More high-quality and large sample RCTs are expected to get more accurate results.

Omentopexy with Glubran®2 for reducing complications after laparoscopic sleeve gastrectomy: results of a randomized controlled study

Background

Gastric fistulas, bleeding, and strictures are commonly reported after laparoscopic sleeve gastrectomy (LSG), that increase morbidity and hospital stay and may put the patient’s life at risk. We report our prospective evaluation of application of synthetic sealant, a modified cyanoacrylate (Glubran®2), on suture rime, associated with omentopexy, to identify results on LSG-related complications.

Methods

Patients were enrolled for LSG by two Bariatric Centers, with high-level activity volume. Intraoperative recorded parameters were: operative time, estimated intraoperative bleeding, conversion rate. We prospectively evaluated the presence of early complications after LSG during the follow up period. Overall complications were analyzed. Perioperative data and weight loss were also evaluated. A control group was identified for the study.

Results

Group A (treated with omentopexy with Glubran®2) included 96 cases. Control group included 90 consecutive patients. There were no differences among group in terms of age, sex and Body Mass Index (BMI). No patient was lost to follow-up for both groups. Overall complication rate was significantly reduced in Group A. Mean operative time and estimated bleeding did not differ from control group. We observed three postoperative leaks in Group B, while no case in Group A (not statistical significancy). We did not observe any mortality, neither reoperation. Weight loss of the cohort was similar among groups. In our series, no leaks occurred applying omentopexy with Glubran®2.

Conclusion

Our experience of omentopexy with a modified cyanoacrylate sealant may lead to a standardized and reproducible approach that can be safeguard for long LSG-suture rime.

Trial registration

Retrospective registration on clinicaltrials.gov PRS, with TRN NCT03833232 (14/02/2019).

The effect of fibrin glue in preventing staple-line leak after sleeve gastrectomy. An experimental study in rats

Purpose

To evaluate the effect of fibrin glue on staple-line leak after sleeve gastrectomy.

Methods

Fourteen adult wistar rats 300 gr were randomized into two groups: Control group (n=7) and study group (n=7). All the rats underwent sleeve gastrectomy using lineer stapler. In the study group, fibrin glue was used to reinforce the staple-line. The rats were sacrificed 7 days after surgery. The stomach was resected, submerged in saline and exposed to excess pressure to obtain a burst pressure value. The gastric staple line was evaluated histopathologically according to the Ehrlich Hunt scale. The results of the two groups were compared.

Results

The mean Ehrlich-Hunt scores for inflammation, fibroblastic activity and neo-angiogenesis were similar between the groups (p>0.05). Collagen deposition was significantly higher in study group (3.42±0.53) when compared with control group (2.57±0.78) (p=0.035). The mean burst pressure was 137.8±8.5 mmHg for control group and 135.0±8.1 mmHg for study group (p=0.536).

Conclusion

Reinforcement of the staple-line with fibrin glue has no effect on the burst pressure after sleeve gastrectomy. More studies are needed to evaluate the precautions against leak after sleeve gastrectomy.

Efficacy of Postoperative Upper Gastrointestinal Series (UGI) and Computed Tomography (CT) Scan in Bariatric Surgery: a Meta-analysis on 7516 Patients

BACKGROUND

To demonstrate the lack of utility and efficacy of routine early postoperative upper gastrointestinal study (UGI) in obese patients undergoing bariatric surgery and to show the higher efficacy of CT scan in cases of clinical suspicion of a leakage, a meta-analysis was performed.

MATERIALS AND METHODS

A literature search including articles published in last 18 years was performed. For both UGI and CT scan, sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated. A first analysis considered overall patients, and a second analysis considered only symptomatic patients.

RESULTS

Starting from 1233 eligible citations, 18 articles, including 7516 patients, were left. The pooled sensitivity was 54% for UGI (95% CI 34-74) with a high heterogeneity (I² = 99.8%, p < .001), whereas CT scan showed a pooled sensitivity of 91% (95% CI 89-93) significantly higher than sensitivity of UGI series (p < 0.01), with a high heterogeneity (I² = 98.9%, p < .001). In symptomatic patients the pooled sensitivity of UGI series was significantly lower than sensitivity of CT scan [49% (95% CI 31-68) vs 94% (95% CI 92-96), p < 0.01]. PPV showed a significant difference between UGI series and CT scan (54 vs 100%, p < 0.01). Specificity for UGI series was 98.6%, and specificity for CT scan was 99.7% (p = ns); the mean NPV was 96 and 98% for UGI series and CT scan (p = ns).

CONCLUSIONS

According to our results, a CT scan triggered by clinical suspicion must be considered the first-line procedure to detect a postoperative leak following primary sleeve gastrectomy or Roux-en-Y gastric bypass.

Cyanoacrylate sealant compared to fibrin glue in staple line reinforcement during laparoscopic sleeve gastrectomy. Pilot prospective observational study

Laparoscopic Sleeve Gastrectomy (LSG) is associated with serious complications, such as staple line leaks and bleeding. This paper presents a novel approach aimed at the successful consolidation of the suture by the use of the cyanoacrylate, here compared to the use of fibrin glue. Fifty consecutive patients, recruited from October 2015 to March 2016, were submitted to laparoscopic sleeve gastrectomy by standardized surgical technique. The staple line was reinforced with cyanoacrylate or fibrin glue. There were no post-operative complications and no operative time prolongation. An early removal of the draining and a reduction of the average hospitalization were observed. The results suggest that staple line reinforcement with cyanoacrylate during laparoscopic sleeve gastrectomy is as easy, safe and cost-saving as with fibrin glue. Furthermore, cyanocrilate allows a chemical omentoplasty with the result of restoring the anatomy. Therefore, this approach is viable and useful for future trials on the efficacy in preventing surgical post-operative complications.

Staple Line Treatment and Bleeding After Laparoscopic Sleeve Gastrectomy

Background and Objectives:

Staple line treatment during laparoscopic sleeve gastrectomy (LSG) remains a controversial issue among bariatric surgeons. The objective of this study was to compare rates of postoperative bleeding (POB) among various methods of staple line reinforcement.

Methods:

The Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program 2015 dataset was queried for patients undergoing an LSG. Patients were stratified by staple line treatment groups—no treatment (NT), suture oversewing (OVERSEW), buttressing by a commercial product (BUTTRESS), and both buttress and oversew (COMBINATION). The primary outcome was POB. Multivariable logistic regression was used to compare POB rates among the treatment groups.

Results:

In the 98,142 LSG patients meeting selection criteria, 623 (0.63%) patients had POB and 181 (0.18%) required reoperation. POB occurred in 0.80% for the NT group, 0.68% for the OVERSEW group, 0.57% for the BUTTRESS group, and 0.55% for the COMBINATION group. On multivariable analyses, all treatment groups were less likely to have POB compared with the NT group—OVERSEW (odds ratio [OR] 0.73, 95% confidence interval [CI] 0.54–0.98), BUTTRESS (OR 0.70, 95% CI 0.57–0.84), and COMBINATION (OR 0.66, 95% CI 0.50–0.89) (all P < .01). Subset analysis revealed no difference between BUTTRESS and OVERSEW (OR 0.95, 95% CI 0.71–1.26, P = .71).

Conclusions:

Relative to an NT staple line, the use of OVERSEW or BUTTRESS can decrease the rates of POB by up to 30%. The use of these techniques should be strongly considered by the bariatric surgeon.

Laparoscopic Sleeve Gastrectomy has a Lower Risk of Postoperative Bleeding Than Laparoscopic Roux-en-Y Gastric Bypass

Measures to reduce postoperative bleeding (POB) after bariatric surgery is skewed toward laparoscopic sleeve gastrectomy (LSG). We use 2015 Metabolic and Bariatric Surgery Accreditation and Quality Improvement Program (MBSAQIP) to characterize the differences in bleeding rates between LSG and laparoscopic Roux-en-Y gastric bypasses (LRYGB). Propensity score matching and multivariable logistic regressions tested for independent differences in POB rates. A total of 168,093 patients from 742 centers were identified in the data set. After selection 36,925 patients with LRYGB and 20,020 patients with LSG were included in the analysis. A total of 710 (1.25%) patient suffered a POB. The independent odds of POB were 38% lower for patients having LSG compared with those having LRYGB (odds ratio, 0.62; 95% confidence interval=0.51-0.76). This difference is more pronounced with intraoperative securing of the staple line. Appropriate measures to reduce POB after each type of bariatric procedure is warranted.

Greater curvature as a gastric pouch for sleeve gastrectomy: a novel bariatric procedure. Feasibility study in a canine model

BACKGROUND

Laparoscopic sleeve gastrectomy (LSG) has serious complications, such as leaks, reflux, stenosis, and kinks, which are also consequences of shortcomings in the LSG technique.

OBJECTIVES

We evaluated the feasibility and weight loss of a novel bariatric procedure, using the greater curvature as the gastric pouch for sleeve gastrectomy (SG) in dogs.

SETTING

Animal house in Faculty of Medicine, Cairo University.

METHODS

Five 20- to 25-kg stray mongrel male dogs were subjected to open SG using the greater curve as the gastric pouch (GCSG group). The weight was monitored at day of surgery and at postoperative weeks 2, 4, 6, and 8; weight progression was compared with a sham and a standard SG group. By the end of the follow-up period autopsy was done.

RESULTS

The mean operative time in GCSG group was 39.6 ± 3.97 minutes. At the end of the study, dogs in the sham group had gained 8% of their preoperative weight, while the GCSG and standard SG groups lost 24.7% and 25% of their preoperative weight, respectively. At autopsy, the gastric sleeve in the GCSG group showed excellent healing with no stenotic areas, kinks, or mucosal ulcerations.

CONCLUSION

Greater curvature SG is technically feasible in a canine model. Larger studies with longer follow-up period will be needed to assess weight progression and resolution of the metabolic co-morbidities.

Effectiveness of Fibrin Sealant Application on the Development of Staple Line Complications After Sleeve Gastrectomy: A Prospective Randomized Trial

OBJECTIVES

Evaluate the effectiveness of the use of fibrin sealant (FS) for preventing the development of staple line complications (SLCs) after sleeve gastrectomy (SG).

BACKGROUND

There is no consensus on the best means of preventing SLCs after SG.

METHODS

This was a prospective, intention-to-treat, randomized, 2 center study of a group of 586 patients undergoing primary SG (ClinicalTrials.gov identifier: NCT01613664) between March 2014 and June 2017. The 1:1 randomization was stratified by center, age, sex, gender, and body mass index, giving 293 patients in the FS group and 293 in the control group (without FS). The primary endpoint (composite criteria) was the incidence of SLCs in each of the 2 groups. The secondary criteria were the mortality rate, morbidity rate, reoperation rate, length of hospital stay, readmission rate, and risk factors for SLC.

RESULTS

There were no intergroup differences in demographic variables. In an intention-to-treat analysis, the incidence of SLCs was similar in the FS and control groups (1.3% vs 2%, respectively; P = 0.52). All secondary endpoints were similar: complication rate (5.4% vs 5.1%, respectively; P = 0.85), mortality rate (0.3% vs 0%, respectively; P = 0.99), GL rate (0.3% vs 1.3%, respectively; P = 0.18), postoperative hemorrhage/hematoma rate (1% vs 0.7%, respectively; P = 0.68), reoperation rate (1% vs 0.3%, respectively; P = 0.32). Length of stay was 1 day in both groups (P = 0.89), and the readmission rate was similar (5.1% vs 3.4%, respectively; P = 0.32). No risk factors for SLCs were found.

CONCLUSION

The incidence of postoperative SLCs did not appear to depend on the presence or absence of FS.

[Will laparoscopic sleeve gastrectomy continue to exist as a stand-alone procedure? : A procedure critical perspective]

BACKGROUND

Sleeve gastrectomy is currently the most frequently performed bariatric procedure worldwide; however, with respect to a certain need for revisional surgery (due to reflux disease or weight regain) there is an ongoing discussion about the value of sleeve gastrectomy in terms of a stand-alone procedure.

OBJECTIVE

The aim of this article is to critically discuss whether sleeve gastrectomy can still be considered a stand-alone procedure.

MATERIAL AND METHODS

The current literature was searched for results after sleeve gastrectomy and the recommendations regarding this procedure are discussed.

RESULTS

Currently approximately 50% of primary bariatric procedures are sleeve gastrectomies, which has become a well-established stand-alone procedure. Sleeve gastrectomy leads to good mid-term results; however, the results of the Roux-en-Y gastric bypass are comparatively superior in terms of type 2 diabetes remission, control of preexisting or de novo reflux disease and weight loss. The mortality is comparable; however, the morbidity is lower after sleeve gastrectomy but there is a relevant rate of fistulas of the stapler suture.

CONCLUSION

Patients considered for sleeve gastrectomy must be informed of the procedure-specific risks, including the unforeseeable need for revision or redo surgery firstly due to weight regain or failing to reach the individual therapy target and secondly for worsening of a preexisting or de novo reflux disease.

Reinforcement of the Staple Line during Gastric Sleeve: A Comparison of Buttressing or Oversewing, versus No Reinforcement- A Single-Institution Study

Laparoscopic sleeve gastrectomy (LSG) is a well-established treatment for morbid obesity. Staple line leak (SLL) remains one of the most serious and life-threatening complications after LSG; however, no consensus exists for prevention. The purpose of this study is to review and compare the different methods of staple line management used at our institution. Retrospective review of preoperative, intraoperative, and postoperative factors was performed for all patients undergoing LSG at a single institution between September 2010 and August 2015. Primary outcome measure was SLL by reinforcement method (none/Seamguard/Oversewing). A total of 256 patients undergoing LSG were included, 197 (76.95%) were women and 233 (87.11%) were whites. The patients had a mean age of 44.64 years and body mass index of 49.24 kg/m22. Among those patients, 145 (56.64%) had staple line reinforced with suture (28, 10.94%) or Gore Seamguard (115, 44.92%) and 111 (43.36%) had no reinforcement, with no difference in baseline factors between the groups (all P > 0.05). Gastric leaks were identified in nine patients (3.52%) with no difference between reinforcement (2.7 vs 2.1%, P = 0.54) or leak test method (air vs methylene blue). However, oversewing the staple line was associated with higher incidence of stenosis ( P < 0.01). SLL after LSG is a serious complication with significant morbidity and mortality. This study demonstrated that staple line reinforcement does not provide significant leak reduction but does reduce intra-operative staple line bleeding. In addition, oversewing the staple line was associated with postoperative sleeve stenosis without added benefits.

Laparoscopic Sleeve Gastrectomy in Kidney Transplant Candidates: a Case Series

BACKGROUND

Patients with a body mass index (BMI) >35 kg/m² who need kidney transplant present with increased postoperative mortality and reduced kidney graft survival compared to patients with a lower BMI. For this reason, obese patients are often excluded from the transplantation waiting list. The aim of this study was to evaluate the feasibility and the results of laparoscopic sleeve gastrectomy (LSG) for obese patients awaiting a kidney transplant.

METHODS

This was a retrospective study on patients with dialysis-dependent renal failure (DDRF) operated on at two first-level bariatric centers in Paris (France). All the patients were contraindicated for kidney transplantation due to the presence of morbid obesity.

RESULTS

Nine DDFR patients with a mean BMI of 45.9 kg/m² underwent LSG for the treatment of obesity. Furthermore, all patients presented with hypertension and sleep apnea and six out nine were diabetics. In the immediate postoperative period, all patients were transferred to the intensive care unit (mean stay of 2.1 days). The only major adverse event was a delayed weaning from mechanical ventilation in one patient. The mean hospital stay was 5.5 days (3-12). The total weight loss (TWL) was 27.1, 33.6, and 39.5 kg at 6, 12, and 18 months, respectively. One patient underwent renal transplantation 18 months after LSG, and the other five patients were actively listed for kidney transplantation.

CONCLUSIONS

According to the results of this small sample series, LSG seems to be an effective and safe procedure in DDRF patients with concomitant obesity and can increase access to transplantation.

Staple Line Reinforcement in Laparoscopic SleeveGastrectomy: Experience in 1023 Consecutive Cases

INTRODUCTION

Laparoscopic sleeve gastrectomy (LSG) is one of the most frequently performed bariatric procedures performed worldwide. However, staple line-related complications have become a major challenge for bariatric surgeons. The aim of this study was to evaluate the morbidity in a cohort of patients who underwent LSG with imbricated oversewing of the staple line at a single high-volume center.

MATERIALS AND METHODS

We retrospectively reviewed prospectively collected data for all patients who underwent LSG to treat obesity at our institution from January 2010 to September 2016. All practitioners had undergone training with a single senior bariatric surgeon using oversewing as staple line reinforcement (SLR).

RESULTS

In total, 1023 LSGs were performed (female, 67.3%; mean age, 40.6 ± 10.8 years; median preoperative body mass index, 37 ± 4.5 kg/m²). The mean operative time was 67.6 ± 23.4 min (range, 30-150 min). The rate of conversion to open surgery was 0.3%. Early complications were noted in 18 patients (1.8%), including 5 cases of bleeding (0.5%). No leaks, stenosis, or mortality occurred.

CONCLUSIONS

LSG is a safe technique, but staple line-associated complications can be life-threatening. In this series, no leaks occurred from the very beginning of the surgeons' experience in LSG. Imbricated oversewing of the staple line, proper mentoring, and performance of surgery in appropriate settings are good approaches to decreasing complications.

Laparoscopic reinforcement suture on staple-line of duodenal stump using barbed suture during laparoscopic gastrectomy for gastric cancer

Purpose

Duodenal stump fistula (DSF) is a serious complication after gastrectomy for gastric cancer. Although risk evaluation and management of DSF were presented by some investigators, there was no technical attempt has been made to prevent DSF during laparoscopic gastrectomy until now.

Methods

Consecutive 99 patients were enrolled from April 2014 to February 2016 in 2 institutes. All patients were performed laparoscopic gastrectomy for gastric cancer. After cutting of duodenal stump, laparoscopic reinforcement suture (LARS) commenced with continuous invagination method or interrupted method by barbed suture. Clinicopathologic features and postoperative outcomes were analyzed.

Results

Fifty-six patients had comorbidity including 5 patients with duodenal ulcer. Most patients were performed distal gastrectomy with B-II, and 10 patients total gastrectomy with Roux en Y esophagojejunostomy. Although there were 2 esophagojejunostomy leakage and 1 artificial lesser curvature leakage, DSF did not occurred at all in this study. Mean operation time was 3 hours and mean LARS procedure time was 8 minutes.

Conclusion

LARS of duodenal stump can be considered as one of prevention methods of DSF during laparoscopic gastrectomy for gastric cancer. So this new technique will be necessary to appropriately evaluate by prospective randomized controlled trial in the future.

Staple line oversewing during laparoscopic sleeve gastrectomy

Introduction This meta-analysis was performed to assess the possible benefits of staple line oversewing during laparoscopic sleeve gastrectomy. Methods A comprehensive search up to February 2017 was conducted on PubMed, the Web of Science™ and Embase™. All eligible studies were included, and the outcomes of staple line bleeding and leak, overall complications and operative time were pooled. Results A total of 7 randomised controlled trials involving 845 patients (428 cases and 417 controls) were analysed. There was no significant difference in staple line bleeding (relative risk [RR]: 0.858, 95% confidence interval [CI]: 0.343-2.143, p=0.742), leak (RR: 0.650, 95% CI: 0.257-1.644, p=0.363) or overall complications (RR: 0.913, 95% CI: 0.621-1.342, p=0.644) between the oversewing group and the patients who did not have oversewing. Oversewing of the staple line was associated with a longer operative time (weighted mean difference: 14.400, 95% CI: 7.198-21.602, p=0.000). Conclusions Oversewing the staple line during laparoscopic sleeve gastrectomy does not decrease the risk of staple line bleeding, leakage or overall complications but it does prolong the operative time.

A Preventive Strategy for Staple Line Bleeding in Morbidly Obese Patients Undergoing Sleeve Gastrectomy

BACKGROUND

Risk factors for staple line bleeding (SLB) during and after sleeve gastrectomy (SG) are various, including patient related factors, perioperative medications, and surgical technique, although there is little clarification in the literature of the role played by blood pressure during the stapling phase. The aim of the present retrospective cohort study was to identify possible risk factors liable to cause SLB.

MATERIALS AND METHODS

Data collected prospectively from 120 consecutive patients who underwent SG were analyzed retrospectively according to age, gender, body mass index (BMI), international normalized ratio (INR) value, intraoperative systolic blood pressure (SBP), and mean arterial blood pressure (MABP).

RESULTS

In univariate analysis, age, stapling phase SBP and MABP, and the duration of surgery were all significantly higher in patients with SLB than those without (P < .05). In distinguishing patients with SLB from those without, the cutoff threshold for SBP during the stapling phase was 120 mmHg with a 78.9% sensitivity, 97.6% specificity, 93.8% positive predictive value, 90.9% negative predictive value, and 91.7% accuracy (AUC = 0.908, 95% CI: 0.839-0.976, and P < .001). In multivariate logistic regression analysis, independent of age and operation time, SBP >120 mmHg significantly maintained its predictive power on SLB (95% CI: 32.410-1457.896, P < .001).

CONCLUSION

A SBP >120 mmHg during the division of the stomach is an independent risk factor for SLB. Maintaining intraoperative SBP ≤120 mmHg during the stapling phase does not only decrease the risk of SLB but also the need for homeostatic agents such as clips and sutures, which in turn prolong the operative time and increase cost.

Integrated Approaches for the Management of Staple Line Leaks following Sleeve Gastrectomy

Introduction. Aim of the study was trying to draw a final flow chart for the management of gastric leaks after laparoscopic sleeve gastrectomy, based on the review of our cases over 10 years' experience. Material and Methods. We retrospectively reviewed all patients who underwent LSG as a primary operation at the Bariatric Unit of Tor Vergata University Hospital in Rome from 2007 to 2015. Results. Patients included in the study were 418. There were 6 staple line leaks (1.44%). All patients with diagnosis of a leak were initially discharged home in good clinical conditions and then returned to A&E because of the complication. The mean interval between surgery and readmission for leak was 13,4 days (range 6-34 days, SD ± 11.85). We recorded one death (16.67%) due to sepsis. The remaining five cases were successfully treated with a mean healing time of the gastric leak of 55,5 days (range 26-83 days; SD ± 25.44). Conclusion. Choosing the proper treatment depends on clinical stability and on the presence or not of collected abscess. Our treatment protocol showed being associated with low complication rate and minor discomfort to the patients, reducing the need for more invasive procedures.

The effect of oversewing the staple line in laparoscopic sleeve gastrectomy: randomized control trial

INTRODUCTION

Laparoscopic sleeve gastrectomy (LSG) is one of the most popular bariatric procedures. The procedure is associated with serious staple-line complications such as bleeding, leaks, and stenosis.

AIM

To determine whether oversewing the staple line, compared with clipping, in LSG reduces the incidence of postoperative bleeding.

MATERIAL AND METHODS

We conducted a parallel-group, prospective, randomized controlled trial (RCT) of 100 patients who underwent LSG for obesity at a single institution between May 2014 and August 2015. Patients were assigned to one of two groups for reinforcement of the staple line: the oversewing group (staple line oversewn) or the clipping group (staple line clipped). The primary outcome was reoperation for hemodynamic instability caused by staple-line bleeding within 72 h postoperatively. The secondary outcomes were operative duration, length of hospital stay, postoperative leaks, and postoperative stenosis.

RESULTS

Mean operative duration was longer in the oversewing group (78.2 ±20.5 min) than in the clipping group (64.1 ±16.5 min, p < 0.001). Mean length of hospital stay was comparable in both groups. Postoperatively, there was no significant between-group difference in bleeding (oversewing, n = 0 vs. clipping, n = 2 (4.6%); p = 0.21) or in stenosis and leakage (both outcomes: oversewing, n = 0, vs. clipping, n = 1 (2.3%); p = 0.46).

CONCLUSIONS

Oversewing the staple line prolongs operative duration. No conclusions can be drawn regarding the effects of oversewing on staple-line bleeding, postoperative leakage and stenosis, or length of hospital stay.