Long-term outcomes following endoscopic stenting in the management of leaks after foregut and bariatric surgery

Endoscopic Management of Surgical Complications of Bariatric Surgery

Bariatric surgery, although highly effective, may lead to several surgical complications like ulceration, strictures, leaks, and fistulas. Newer endoscopic tools have emerged as safe and effective therapeutic options for these conditions. This article reviews post-bariatric surgery complications and the role of endoscopy in their management.

Revision Bariatric Procedures and Management of Complications from Bariatric Surgery

Bariatric surgery is effective, but may be associated with adverse events. A multi-disciplinary approach including endoscopic interventions can be effective to manage these. Endoscopists should familiarize themselves with gastrointestinal pathology which can occur after bariatric surgery, including nutritional deficiencies, acid reflux, anastomotic stenosis, gallstone disease, leaks, fistulas, and weight regain. Endoscopic interventions including anastomotic stricture dilation, control of bleeding, endoscopic ultrasound-guided approach for endoscopic retrograde cholangiopancreatography, leak or fistula closure via endoscopic suturing or stent placement, and transoral outlet reduction (TORe) or revision obesity surgery endoluminal (ROSE) to address weight regain are among the endoscopic tools which have demonstrated safety and efficacy in the management of adverse events after bariatric surgery.

Stent Management of Leaks After Bariatric Surgery: a Systematic Review and Meta-analysis

BACKGROUND

Despite the low rates of complications of bariatric surgery, gastrointestinal leaks are major adverse events that increase post-operative morbidity and mortality. Endoscopic treatment using self-expanding stents has been used in the therapeutic management of these complications with preliminary good results.

METHODS

We performed a systematic review and meta-analysis of self-expanding stents placement for the management of gastrointestinal leaks after obesity surgery. Overall proportion of successful leak closure, stent migration, and reoperation were analysed as primary outcomes. Secondary outcomes were patients' clinical characteristics, duration and type of stent, other stent complications, and mortality.

RESULTS

A meta-analysis of studies reporting stents was performed, including 488 patients. The overall proportion of successful leak closure was 85.89% (95% CI, 82.52-89.25%), median interval between stent placement and its removal of 44 days. Stent migration was noted in 18.65% (95% CI, 14.32-22.98%) and the overall proportion of re-operation was in 13.54% (95% CI, 9.94-17.14%). The agreement between reviewers for the collected data gave a Cohen's κ value of 1.0. No deaths were caused directly by complications with the stent placement.

CONCLUSIONS

Endoscopic placement of self-expanding stents can be used, in selected patients, for the management of leaks after bariatric surgery with a high rate of effectiveness and low mortality rates. Nevertheless, reducing stent migration and re-operation rates represents an important challenge for future studies.

Current status in endoscopic management of upper gastrointestinal perforations, leaks and fistulas

Recent advancement in endoscopic closure techniques have revolutionized the treatment of gastrointestinal perforations, leaks and fistulas. Traditionally, these have been managed surgically. The treatment strategy depends on the size and location of the defect, degree of contamination, presence of healthy surrounding tissues, patients' condition and the availability of expertise. One of the basic principles of management includes providing a barricade to the flow of luminal contents across the defect. This can be achieved with a wide range of endoscopic techniques. These include endoclips, stenting, suturing, tissue adhesives and glue, and endoscopic vacuum therapy. Each method has their distinct indications and shortcomings. Often, a combination of these techniques is required. Apart from endoscopic closure, drainage procedures by the interventional radiologist and surgical management also play an important role. In this review article, the outcomes of each of these endoscopic closure techniques in the literature is provided in tables, and practical management algorithms are being proposed.

OverStitch Sx Endoscopic suturing system in minimally invasive endoscopic procedures: overview of its safety and efficacy and comparison to oversticthTM

INTRODUCTION

OverStitch endoscopic suturing enables advanced closure by tissue approximation via endoscopically placed sutures with the ability to customize suture patterns. Newer OverStitch generation also known as OverStitch Sx overcame the limitation of the previous generation and is compatible with 20 single channel scopes over four platforms with greater maneuverability and visibility.

AREAS COVERED

In this article we will focus on the differences between three generations of OverStitch. In addition, we will review existing literature on the efficacy of OverStitch in the management of full thickness defect closure, fistula and leaks repair, stent fixation, and bariatric surgeries along with its complications and limitations.

EXPERT OPINION

Assembling overstitch takes less than five minutes and the correct sequence of system assembly is the key for a successful procedure. Transition from the second-generation OverStitch to OverStitch Sx may require three to five cases for learning curve.

Outcome and Adverse Events of Endoscopic Bariatric Stents for Management of Leakage after Bariatric Surgery

INTRODUCTION

Bariatric leakage (BL) is a serious complication with a variety in available treatment options. Endoscopic stenting is preferred because of its minimally invasive nature in morbidly obese patients. Various modifications have been applied to stents since its use in palliation of malignant strictures. Few studies have exclusively evaluated the efficacy of bariatric stents in management BL.

METHODS

A retrospective cohort study of patients with BL managed by bariatric stents in the period between July 2014 and January 2019. The primary outcome was the clinical success in healing of leakage and secondary outcomes included adverse events (AEs), hospital stay and procedure-related mortality.

RESULTS

Forty-five patients were included in this study. Clinical success occurred in 33 patients (73.3%). There was no stent-related mortality. The most frequent stent-related complications were reflux (62.2%), intolerance (55.6%), and migration (17.8%). Severe AEs occurred in 9 patients (20%). The overall complications rate was higher in diabetic patients (P = 0.048). Intolerance was significantly associated with shorter interval to management (P = 0.02). Stent migration was higher in male patients (P = 0.019) and higher BMI (P = 0.024).

CONCLUSION

Endoscopic stenting is a double-edged weapon that must be handled cautiously. It is a highly effective therapy, and early intervention is the main determinant of its efficacy. But it is not a treatment without complications (80%). The variant and high prevalence of complications mandates a strict follow-up throughout the stenting duration.

Role of Primary Use of Mega Stents Alone and Combined with Other Endoscopic Procedures for Early Leak and Stenosis After Bariatric Surgery, Single-Institution Experience

PURPOSE

Surgical therapy for post-bariatric surgery complications is associated with significant morbidity and mortality. Endoscopic options like primarily endoscopically placed fully covered self-expandable metallic stents (SEMS) offer significant benefits for the management of leaks and obstructions or stenosis, and even in case of mega stent failure, further endoscopic techniques could resolve the situation.

MATERIALS AND METHODS

We conducted a single-centre retrospective study on patients with leakage and stenosis/obstruction after bariatric surgery who were managed primarily by SEMS between January 2015 and January 2019. Clinical success rate was evaluated in terms of the cure of the reason for stenting, the need for other interventions, and the presentation of stent-related complications.

RESULTS

There were 58 patients included, (50 with leak, 8 with stenosis/obstruction following bariatric surgery). Mean time to stent placement was 6.82 (±1.64) days for the leak group and 35 (±21.13) days for the stenosis group (p = 0.019). Successful outcomes with SEMS alone were achieved in 42 (72.41%) patients, while 16 patients had failed SEMS treatment, of whom 14 were successfully managed by endoscopic procedures while two cases needed surgical intervention. Of the SEMS-related complications encountered, 25.86% were ulcers; 24.13%, vomiting; 22.41%, gastroesophageal reflux disease (GerdQ≥8); 18.96%, stent migration; and 5.17%, stent intolerance.

CONCLUSION

A mega stent is an effective and safe tool for the early management of post-bariatric surgery leakage and stenosis, and it is associated with acceptable rates of failure that can be managed by further endoscopic techniques in most of the patients.

Endoscopic management of leaks and fistulas after bariatric surgery: a systematic review and meta-analysis

Background

Endoscopic techniques have become the first-line therapy in bariatric surgery-related complications such as leaks and fistulas. We performed a systematic review and meta-analysis on the effectiveness of self-expandable stents, clipping, and tissue sealants in closing of post-bariatric surgery leak/fistula.

Methods

A systematic literature search of the Medline/Scopus databases was performed to identify full-text articles published up to February 2019 on the use of self-expandable stents, clipping, or tissue sealants as primary endoscopic strategies used for leak/fistula closure. Meta-analysis of studies reporting stents was performed with the PRISMA guidelines.

Results

Data concerning the efficacy of self-expanding stents in the treatment of leaks/fistulas after bariatric surgery were extracted from 40 studies (493 patients). The overall proportion of successful leak/fistula closure was 92% (95% CI, 90–95%). The overall proportion of stent migration was 23% (95% CI, 19–28%). Seventeen papers (98 patients) reported the use of clipping: the over-the-scope clips (OTSC) system was used in 85 patients with a successful closure rate of 67.1% and a few complications (migration, stenosis, tear). The successful fistula/leak closure using other than OTSC types was achieved in 69.2% of patients. In 10 case series (63 patients), fibrin glue alone was used with a 92.8–100% success rate of fistula closure that usually required repeated sessions at scheduled intervals. The complications of fibrin glue applications were reported in only one study and included pain and fever in 12.5% of patients.

Conclusions

Endoscopic techniques are effective for management of post-bariatric leaks and fistulas in properly selected patients.

Electronic supplementary material

The online version of this article (10.1007/s00464-020-07471-1) contains supplementary material, which is available to authorized users.