Efficacy of intracorporeal reinforcing sutures for anastomotic leakage after laparoscopic surgery for rectal cancer. Surg Endosc. 2015;29:3535-3542. [PMID: 25673349 DOI: 10.1007/s00464-015-4104-2]

Physical pressure resistance of gastrointestinal anastomotic site via plate of polyglycolic acid promoting fibrosis

Anastomotic-leakage incidence has been reported to be reduced on using polyglycolic acid (PGA) sheets as reinforcing materials; however, there is insufficient evidence regarding the reinforcement mechanism. Therefore, we investigated effects of PGA sheets on gastrointestinal anastomoses in rats. In the first approach, five rats underwent laparotomy; the PGA sheet was pasted onto the normal cecal wall. After five days, the cecum was removed and histologically evaluated. In the second approach, ten rats were randomly divided into two groups of five animals each. The rats underwent laparotomy; the cecal wall was sutured after a full-thickness incision. In the PGA group, a PGA sheet was used to cover the suture area. After 5 days, the cecum was removed, and the physical pressure resistance was evaluated. We confirmed the growth of a fibrous capsule measuring 855 (648-1048) µm outside the cecal serosa in the first approach. The median pressure resistance in the second approach was 57.0 (45.0-90.0) and 90.0 (82.5-94.5) mmHg in Control and PGA groups, respectively. The pressure resistance was significantly higher in the PGA group (p = 0.046). In summary, the PGA sheet may form a barrier of fibrosis on the intestinal wall and provide reinforcement to prevent anastomotic leakage.

A novel circumferential continuous reinforcing suture for anastomosis after laparoscopic resection for rectal cancer and sigmoid cancer: a retrospective case-controlled study

INTRODUCTION

This study aimed to investigate the effectiveness of a novel method for anastomosis reinforcement to minimize the occurrence of anastomotic complications after surgical resection of rectal and sigmoid cancer.

METHODS

We recruited 378 patients who underwent laparoscopic rectal anterior resection of rectal cancer and sigmoid cancer in SYSUCC. The occurrence rates of intraoperative bleeding, operation time, and postoperative anastomotic complications were compared between the treatment group receiving anastomotic reinforcement and the control group without anastomotic reinforcement.

RESULTS

The incidence of anastomotic leakage in the treatment group was significantly lower than that in the control group (1.59% vs. 11.64%, p < 0.001). Following the application of inverse probability of treatment weighting (IPTW) to adjust for factors influencing the occurrence of anastomotic leakage, the incidence of anastomotic leakage remained significantly lower in the treatment group compared to the control group (2.54% vs. 12.08%, p < 0.001).

CONCLUSION

The circumferential continuous anastomosis reinforcing suture method, recommended for laparoscopic surgery for rectal and sigmoid cancer, has the potential to effectively minimize the occurrence of anastomotic complications.

Efficacy of reinforcing sutures for prevention of anastomotic leakage after low anterior resection for rectal cancer: A systematic review and meta-analysis

BACKGROUND AND OBJECTIVES

Anastomotic leakage is a serious complication following surgery for cancer of the rectum. It is not clear whether reinforcing sutures could prevent anastomotic leakage. Therefore, this study aims at evaluating the efficacy of reinforcing sutures on anastomotic leakage.

METHODS

We searched PubMed, Embase, and the Cochrane Library databases from inception to January 31, 2023. We included studies comparing anastomosis with reinforcing sutures to anastomosis without reinforcing sutures after low anterior resection. Risk of bias was assessed by the Cochrane tool for RCTs and the Risk of Bias in Non-Randomized Studies (ROBINS)-I tool for observational studies. The overall quality of evidence for primary outcome was assessed using Grading of Recommendations Assessment, Development, and Evaluations methodology.

RESULTS

Two RCTs (345 patients) and four observational studies (783 patients) were included. Anastomotic leakage occurred in 4.4% (24 of 548) of patients with reinforcing sutures and 11.9% (69 of 580) of patients without reinforcing sutures. Meta-analysis showed a lower incidence of anastomotic leakage (RR, 0.41; 95% CI 0.25 to 0.66, low certainty) in patients with reinforcing sutures. Operative time (WMD, -3.66; 95% CI -18.58 to 11.25) and reoperation for anastomotic leakage (RR, 0.69; 95% CI 0.23 to 2.08) were similar between patients with reinforcing sutures and those without reinforcing sutures.

CONCLUSIONS

While observational data suggest that, there is a clear benefit in terms of reducing the risk of anastomotic leakage with the use of reinforcing sutures, RCT data are less clear. Further large, prospective studies are warranted to determine whether a true clinically important benefit exists with this technique.

Clinical efficacy of anastomotic reinforcement suture in preventing anastomotic leakage after rectal cancer surgery: a systematic review and meta-analysis

PURPOSE

Anastomotic leakage (AL) is a common postoperative complication of rectal cancer, with an incidence of about 10%, and the efficacy of reinforced sutures for preventing AL remains contentious. This study investigated the safety and effectiveness of reinforcement sutures for preventing AL after rectal cancer surgery.

METHODS

The present authors conducted a systematic search in the PubMed, Embase, Cochrane Library, Sinomed, Web of Science, Wanfang, VIP, and CNKI databases for randomized controlled trials (RCTs) and nonrandomized studies up to June 2023. We performed a meta-analysis to evaluate the efficacy of anastomotic reinforcement sutures after rectal cancer surgery. The primary outcome measures were AL, anastomotic bleeding, and infection rates.

RESULTS

Eleven articles (1921 subjects) were analyzed, with 912 and 1009 cases in the reinforced and unreinforced suture groups, respectively. The reinforced suture group showed a lower AL incidence (odds ratio [OR]=0.25, 95% CI 0.17-0.37, P< 0.00001), lower infection rate (OR=0.41, 95%CI 0.19-0.89, P<0.05), shorter hospital stay (mean difference [MD]=-0.57, 95%CI -1.15-0.00, P≤0.05), and earlier anal exhaust (MD=-0.12, 95%CI -0.23-0.00, P<0.05). However, the operative time (MD=18.25, 95% CI 12.20-24.30, P<0.00001) was longer for reinforced sutures than for unreinforced sutures. There were no significant differences between the suture techniques in intraoperative blood loss MD=2.74, 95% CI -4.50-9.97, P>0.05), incidence of anastomotic bleeding (OR=0.49, 95%CI 0.12-1.97, P>0.05), and incidence of intestinal obstruction (OR=0.65, 95%CI 0.27-1.61, P>0.05).

CONCLUSION

Existing articles indicate that anastomotic reinforcement sutures can significantly reduce AL incidence. However, this conclusion still requires confirmation based on multicentre, high-quality RCTs with large sample sizes.

Effect of intraoperative anastomotic reinforcement suture on the prevention of anastomotic leakage of double-stapling anastomosis for laparoscopic rectal cancer: a systematic review and meta-analysis

BACKGROUND AND AIMS

The use of sutures to strengthen the anastomosis after rectal cancer surgery to reduce the possibility of anastomotic leakage has been debated. The aim of this systematic review and meta-analysis was to investigate the influence of intraoperative anastomotic reinforcing sutures on anastomotic leakage of double-stapling anastomosis for laparoscopic rectal cancer surgery.

METHODS

A systematic search of PubMed, Embase, Web of Science, and Cochrane databases was performed to identify literature examining anastomotic leak as the primary outcome to compare studies of laparoscopic surgery for rectal cancer using the double-stapling anastomosis technique with or without intraoperative anastomotic reinforcement with sutures.

RESULTS

A total of 1122 rectal cancer patients from 5 nonrandomized studies were included in the research. In the combined trial, intraoperative anastomotic reinforcement sutures significantly reduced the incidence of anastomotic leakage in patients who underwent laparoscopic rectal cancer surgery (OR, 0.32; 95% CI, 0.19-0.55; p < 0.0001). With or without intraoperative anastomotic reinforcing sutures, the incidence of postoperative reoperation for anastomotic leak did not differ substantially (OR, 0.32; 95% CI, 0.08-1.21, p = 0.09). Moreover, the surgery was prolonged due to anastomotic reinforcement with sutures (OR, 6.64; 95% CI, - 6.18 to 19.47, p = 0.31).

CONCLUSIONS

Intraoperative anastomotic reinforcement with sutures may be associated with a lower incidence of anastomotic leakage. The amount of research evidence is limited because most of the studies analyzed did not include patients with factors such as neoadjuvant therapy or prophylactic stomas. Therefore, additional multicenter randomized controlled studies with larger size samples are needed to support the validity of the approach.

Impact of a circular powered stapler on preventing anastomotic leakage in patients with left-sided colorectal cancer: a retrospective study

BACKGROUND

The powered circular stapler, which was developed with the aim of providing reliable and reproducible anastomosis, provides complete anastomosis, resulting in a reduced risk of anastomotic leakage. The aim of this study was to compare the incidence of anastomotic leakage between a conventional manual circular stapler (MCS) and the ECHELON CIRCULAR™ Powered Stapler (ECPS) in patients with left-sided colorectal cancer who underwent anastomosis with the double stapling technique.

METHODS

A total of 187 patients with left-sided colorectal cancer who underwent anastomosis with the double stapling technique with a conventional MCS or the ECPS during surgery at Osaka City University Hospital between January 2016 and July 2022 were enrolled in this study.

RESULTS

The incidence of anastomotic leakage in the ECPS group was significantly lower than that in the MCS group (4.4% versus 14.3%, p = 0.048). Furthermore, even after propensity score matching, an association was found between the use of the ECPS and a reduced incidence of anastomotic leakage.

CONCLUSION

The ECPS has the potential to help reduce the rate of anastomotic leakage in left-sided colorectal surgery.

Efficacy of the polyglycolic acid sheet for preventing anastomotic leakage in double-stapling technique anastomosis for left-sided colon or rectal cancer surgery: a propensity score-matched study

BACKGROUND

To prevent anastomotic leakage in patients with left-sided colorectal cancer who underwent double-stapling technique (DST) anastomosis, we investigated a new method: DST anastomosis with a polyglycolic acid (PGA) sheet. This procedure has been shown to have the potential to decrease the rate of anastomotic leakage. However, due to the small number of cases enrolled in our previous study, it was not possible to compare the outcomes of the new and conventional procedures. The aim of this study was to evaluate the effect of the PGA sheet on preventing anastomotic leakage in patients with left-sided colorectal cancer who underwent DST anastomosis by retrospectively comparing the anastomotic leakage rate between the PGA sheet and conventional groups.

METHODS

A total of 356 patients with left-sided colorectal cancer who underwent DST anastomosis during surgery at Osaka City University Hospital between January 2016 and April 2022 were enrolled in this study. Propensity score matching was performed to reduce the confounding effects secondary to imbalances in the use of PGA sheets.

RESULTS

The PGA sheet was used in 43 cases (PGA sheet group) and it was not used in 313 cases (conventional group). After propensity score matching, the incidence of anastomotic leakage in the PGA sheet group was significantly lower than that in the conventional group.

CONCLUSION

DST anastomosis with PGA sheet, which is easy to perform, contributes to the reduction of anastomotic leakage rate by increasing the strength of the anastomotic site.

Preoperative risk factors associated with anastomotic leakage after colectomy for colorectal cancer: a systematic review and meta-analysis

INTRODUCTION

anastomotic leak (AL) after colectomy for colorectal cancer (CRC) is a life-threatening complication. This systematic review and meta-analysis aimed to evaluate the preoperative risk factors for AL in patients submitted to colectomy.

METHODS

the bibliographic search covered 15 years and 9 months, from 1st January 2005 to 19th October 2020 and was performed using PubMed, Cochrane Library, Scopus, Biblioteca Virtual em Saúde, Europe PMC and Web of Science databases. The inclusion criteria were cross-sectional, cohort and case-control studies on preoperative risk factors for AL (outcome). The Newcastle-Ottawa scale was used for bias assessment within studies. Meta-analysis involved the calculation of treatment effects for each individual study including odds ratio (OR), relative risk (RR) and 95% confidence intervals (95% CI) with construction of a random-effects model to evaluate the impact of each variable on the outcome. Statistical significance was set at p<0.05.

RESULTS

cross-sectional studies were represented by 39 articles, cohort studies by 21 articles and case-control by 4 articles. Meta-analysis identified 14 main risk factors for AL in CRC patients after colectomy, namely male sex (RR=1.56; 95% CI=1.40-1.75), smoking (RR=1.48; 95% CI=1.30-1.69), alcohol consumption (RR=1.35; 95% CI=1.21-1.52), diabetes mellitus (RR=1.97; 95% CI=1.44-2.70), lung diseases (RR=2.14; 95% CI=1.21-3.78), chronic obstructive pulmonary disease (RR=1.10; 95% IC=1.04-1.16), coronary artery disease (RR=1.61; 95% CI=1.07-2.41), chronic kidney disease (RR=1.34; 95% CI=1.22-1.47), high ASA grades (RR=1.70; 95% CI=1.37-2.09), previous abdominal surgery (RR=1.30; 95% CI=1.04-1.64), CRC-related emergency surgery (RR=1.61; 95% CI=1.26-2.07), neoadjuvant chemotherapy (RR=2.16; 95% CI=1.17-4.02), radiotherapy (RR=2.36; 95% CI=1.33-4.19) and chemoradiotherapy (RR=1.58; 95% CI=1.06-2.35).

CONCLUSIONS

important preoperative risk factors for colorectal AL in CRC patients have been identified based on best evidence-based research, and such knowledge should influence decisions regarding treatment.

The effect of staple height and rectal wall thickness on anastomotic leak development after laparoscopic low anterior resection

BACKGROUND

The aim of this study was to evaluate the effect of staple height and rectal wall thickness on the development of an anastomotic leak after laparoscopic low anterior resection performed with the double stapling technique.

METHODS

One hundred ninety-nine patients treated from 2013 to 2021 were enrolled. Patients were divided into two groups: those who developed an anastomotic leak (AL (+)) and those who did not (AL (-)). Clinicopathological factors were compared between the groups.

RESULTS

Anastomotic leaks were observed in 8/199 patients (4%). A 1.5 mm linear stapler was used for 35/199 patients (17%), 1.8 mm for 89 (45%), and 2 mm for 75 (38%). In the AL (+) group (n = 8), lower staple height (1.5 mm or 1.8 mm) was used more frequently than in the AL (-) group (n = 191). Rectal wall thickness and the rectal wall thickness to staple height ratio was significantly (p < .05) greater in the AL (+) group. However, rectal wall thickness was significantly (p < .05) greater in patients who received neoadjuvant treatment and those with advanced T stage (T3,4) lesions.

CONCLUSION

Linear stapler staple height and rectal wall thickness are significantly associated with the development of an anastomotic leak after laparoscopic low anterior resection. Larger staples should be selected in patients with a thicker rectal wall due to neoadjuvant treatment or adjacent advanced rectal tumors.

Intracorporeal reinforcement with barbed suture is associated with low anastomotic leakage rates after laparoscopic low anterior resection for rectal cancer: a retrospective study

Background

Anastomotic leakage (AL) is one of most severe postoperative complications following low anterior resection (LAR) for rectal cancer, and has an adverse impact on postoperative recovery. The occurence of AL is associated with several factors, while few studies explored the role of intracorporeal barbed suture reinforcement in it.

Methods

Consecutive cases underwent laparoscopic LAR for rectal cancer from Mar. 2018 to Feb. 2021 in our center were retrospectively collected. Cases were classified into the intracorporeal barbed suture reinforcement group and the control group according to whether performing intracorporeal reinforcement with barbed suture, and AL incidences were compared between two groups. Propensity score matching (PSM) was then performed based on identified risk factors to reduce biases from covariates between two groups. AL incidences in the matched cohort were compared.

Results

A total of 292 cases entered into the study, and AL incidences were significantly lower in the intracorporeal barbed suture reinforcement group compared with the control group (10.00% vs 2.82%, P = 0.024). Sex, BMI, preoperative adjuvant chemoradiotherapy and anastomotic level were chose for PSM analyses based on previous studies. In the matched cohort, the AL incidences were still significantly lower in the intracorporeal barbed suture reinforcement group (10.57% vs 2.44%, SD = 0.334).

Conclusions

Intracorporeal barbed suture reinforcement is associated with low AL incidences after laparoscopic LAR for rectal cancer, which is a potential procedure for reducing AL and worthy of application clinically.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12893-022-01782-x.

Significance of information obtained during transanal drainage tube placement after anterior resection of colorectal cancer

Introduction

It has recently been reported that the placement of a transanal drainage tube after rectal cancer surgery reduces the rate of anastomotic leakage. However, transanal drainage tube cannot completely prevent anastomotic leakage and the management of transanal drainage tube needs to devise. We investigated the information obtained during transanal drainage tube placement and evaluated the relationship between these factors and anastomotic leakage.

Patients and methods

Fifty-one patients who underwent anterior resection of rectal cancer was retrospectively reviewed. transanal drainage tube was placed for more than 5 days after surgery. The daily fecal volume from transanal drainage tube was measured on postoperative day 1–5, and the defecation during transanal drainage tube placement was investigated.

Results

Anastomotic leakage during transanal drainage tube placement occurred in 4 patients. The anastomotic leakage rate during transanal drainage tube placement in patients whose maximum daily fecal volume or total fecal volume from the transanal drainage tube during postoperative days 1–5 was large was significantly higher than that in patients whose fecal volume was small. The anastomotic leakage rate of the patients with intentional defecation during transanal drainage tube placement was significantly higher than that of the patients without intentional defecation during transanal drainage tube placement. The maximum daily fecal volume and the total fecal volume from the transanal drainage tube during postoperative days 1–5 in patients who experienced intentional defecation during transanal drainage tube placement was significantly higher than that of patients without intentional defecation during transanal drainage tube placement.

Conclusion

A large fecal volume from transanal drainage tube after anterior rectal resection or intentional defecation in patients with transanal drainage tube placement were suggested to be risk factors for anastomotic leakage.

Clinical impact of the triple-layered circular stapler for reducing the anastomotic leakage in rectal cancer surgery: Porcine model and multicenter retrospective cohort analysis

Aim

To investigate the impact of the triple-layered circular stapler compared with the double-layered circular stapler on anastomotic leakage after rectal cancer surgery.

Methods

The bursting pressure was compared between porcine ileocolic anastomoses created using a double- or triple-layered stapler. We also retrospectively analyzed the incidence of severe anastomotic leakage in 194 patients who underwent colorectal anastomosis using a double- or triple-layered circular stapler during rectal cancer resection performed in two cancer centers between January 2015 and April 2021.

Results

In the porcine model, the bursting pressure was higher in anastomoses created using the triple-layered stapler than the double-layered stapler (end-to-end anastomosis: 26.4 ± 6.2 mm Hg vs 14.5 ± 4.3 mm Hg, P = .0031; side-to-side anastomosis: 27.7 ± 5.0 mm Hg vs 18.0 ± 2.9 mm Hg, P = .0275). Intersectional leakage occurred in 41% and 83% of anastomoses created using the triple- or double-layered stapler, respectively (P = .0821). In the clinical cohort, the double- and triple-layered stapler was used in 153 and 41 patients, respectively. The incidence of anastomotic leakage was lower for anastomoses created using the triple-layered stapler vs the double-layered stapler (0.0% vs 5.8%, P = .0362). In multivariate analysis, the factors independently associated with a lower incidence of anastomotic leakage were female sex (odds ratio: 0.16, 95% confidence interval: 0.01-0.90, P = .0354) and triple-layered stapler usage (odds ratio: 0.00, 95% confidence interval: 0.00-0.96, P = .0465).

Conclusion

Anastomoses created using a triple-layered circular stapler had high bursting pressure, which might contribute to a lower incidence of anastomotic leakage after rectal cancer surgery.

Clinical application of terminal ileum suspension in laparoscopic radical resection for low rectal cancer

Objectives

This paper introduces the surgical procedure of "terminal ileum suspension" in the radical resection for low rectal cancer patients and evaluates the possibility of its clinical application.

Methods

This paper retrospectively analyzed the data of patients with low rectal cancer who underwent "terminal ileum suspension" during radical resection of rectal cancer (Dixon) in our hospital, and introduces the specific surgical procedures and key points of "terminal ileum suspension". Observe the relevant conditions of patients during the operation, postoperative recovery and postoperative complications, and analyze the safety and feasibility of this operation ("terminal ileum suspension").

Results

The operation of all 8 patients went smoothly, and no anastomotic leakage, intestinal obstruction, and open diversion of suspended terminal ileum were found. The application of "terminal ileum suspension" in the operation of low rectal cancer has achieved ideal clinical effect, without increasing the rate of anastomotic leakage and rehospitalization, reducing the proportion of the secondary return operation, and reducing the pain of the patients.

Conclusion

"Terminal ileum suspension" is a safe, effective and feasible surgical method for laparoscopic radical resection of low rectal cancer, which can be applied in clinical practice.

Fatores de risco pré-operatórios associados à fístula anastomótica após colectomia para câncer colorretal: revisão sistemática e metanálise

RESUMO Objetivo: fístula anastomótica (FA) após colectomia para câncer colorretal (CCR) é complicação grave. Esta revisão sistemática e meta-análise avaliou os fatores de risco pré-operatórios para FA em pacientes submetidos à colectomia. Métodos: a pesquisa bibliográfica abrangeu 15 anos e 9 meses (1 de janeiro de 2005 - 19 de outubro de 2020), sendo utilizadas as plataformas PubMed, Cochrane Library, Scopus, Biblioteca Virtual em Saúde, Europe PMC e Web of Science. O critério de inclusão foram estudos transversais, coorte e caso-controle em fatores de risco pré-operatórios para FA (desfecho). A escala Newcastle-Ottawa foi usada para avaliação de viés dos estudos. A metanálise envolveu o cálculo dos efeitos de tratamento para cada estudo individualmente incluindo odds ratio (OR), risco relativo (RR) e intervalo de confiança de 95% (IC95%) com construção de modelo de efeitos aleatórios, para avaliar o impacto de cada variável (p<0,05). Resultados: foram selecionados 39 estudos transversais, 21 coortes e quatro casos-controle. A metanálise identificou 14 fatores de risco para FA em pacientes com CCR após colectomia, que são sexo masculino (RR=1,56; IC 95%=1,40-1,75), tabagismo (RR=1,48; IC 95%=1,30-1,69), alcoolismo (RR=1,35; IC 95%=1,21-1,52), diabetes mellitus (RR=1,97; IC 95%=1,44-2,70), doenças pulmonares (RR=2,14; IC 95%=1,21-3,78), doença pulmonar obstrutiva crônica (RR=1,10; IC 95%=1,04-1,16), doença coronariana (RR=1,61; IC 95%=1,07-2,41), doença renal crônica (RR=1,34; IC 95%=1,22-1,47), altas notas na escala ASA (RR=1,70; IC 95%=1,37-2,09), cirurgia abdominal prévia (RR=1,30; IC 95%=1,04-1,64), cirurgia de emergência (RR=1,61; IC 95%=1,26-2,07), quimioterapia neoadjuvante (RR=2,16; IC 95%=1,17-4,02), radioterapia (RR=2,36; IC 95%=1,33-4,19) e quimiorradioterapia (RR=1,58; IC 95%=1,06-2,35). Conclusões: importantes fatores de risco pré-operatórios para FA colorretais em pacientes com CCR foram identificados com base nas melhores pesquisas baseadas em evidências e esse conhecimento deve influenciar decisões relacionadas ao tratamento.

Risk Factors and Preventive Measures for Anastomotic Leak in Colorectal Cancer

Anastomotic leak (AL) represents one of the most detrimental complications after colorectal surgery. The patient-related factors and surgery-related factors leading to AL have been identified in previous studies. Through early identification and timely adjustment of risk factors, preventive measures can be taken to reduce potential AL. However, there are still many problems associated with AL. The debate about preventive measures such as preoperative mechanical bowel preparation (MBP), intraoperative drainage, and surgical scope also continues. Recently, the gut microbiota has received more attention due to its important role in various diseases. Although the underlying mechanisms of gut microbiota on AL have not been validated completely, new strategies that manipulate intrinsic mechanisms are expected to prevent and treat AL. Moreover, laboratory examinations for AL prediction and methods for blood perfusion assessment are likely to be promoted in clinical practice. This review outlines possible risk factors for AL and suggests some preventive measures in terms of patient, surgery, and gut microbiota.

Prevention of anastomotic leakage using a polyglycolic acid sheet in double-stapling technique anastomosis for rectal surgery

Background

Due to the development of surgical techniques and devices, the incidence of anastomosis leakage in rectal surgery has decreased. However, anastomotic leakage in rectal surgery remains a serious postoperative complication. The present study examined whether or not a polyglycolic acid (PGA) sheet is effective for reinforcing rectal anastomosis.

Material and methods

Fifteen patients who underwent double-stapling technique (DST) anastomosis during rectal surgery were enrolled in this study. The PGA sheet was used as the reinforcing material. DST anastomosis was performed with the PGA sheet sandwiched, and a strip of the PGA sheet was wrapped around the anastomosis.

Results

No patients had anastomotic leakage.

Conclusion

A PGA sheet may be effective for preventing anastomotic leakage in DST anastomosis for rectal surgery.

•

The new method for preventing anastomotic leakage in rectal surgery.

•

A polyglycolic acid (PGA) sheet which is absorbable reinforcement material was used.

•

Thanks to the use of the PGA sheet, no patients had anastomotic leakage.

[Prevention of colorectal anastomotic leakage using its reinforcement (results of the randomized study)]

OBJECTIVE

To reduce the incidence of postoperative complications via reinforcement of colorectal anastomosis.

MATERIAL AND METHODS

A randomized prospective study included 115 patients. In the main group (n=60), anterior resections were followed by reinforcement of colorectal anastomosis via suturing the muscular and serous layers at 2, 4, 6, 8, 10, 12 o'clock. In case of low anterior resection, all layers of intestinal wall were transanally sutured at the above-mentioned points. Reinforcement was not performed in the control group (n=55).

RESULTS

In the main group, overall incidence of anastomotic leakage was 8.3% (5/60), in the control group - 25.5% (14/55) (p=0.01). We also analyzed the subgroups of anastomoses with high and low risk of leakage. In case of transabdominal reinforcement, incidence of anastomotic leakage was 11% (2/18) in the main group and 0% (0/14) in the control group (p=0.6). Transanal reinforcement was followed by anastomotic leakage in 7% (3/42) of patients in the main group and 34% (14/41) of patients in the control group (p=0.005).

CONCLUSION

Reinforcement of colorectal instrumental anastomosis by additional sutures reduces the incidence of postoperative complications associated with anastomotic leakage.

Mucosa plication reinforced colorectal anastomosis and trans-anal vacuum drainage: a pilot study with preliminary results

Dehiscence of colorectal anastomosis is a serious complication that is associated with increased mortality, impaired functional and oncological outcomes. The hypothesis was that anastomosis reinforcement and vacuum trans-anal drainage could eliminate some risk factors, such as mechanically stapled anastomosis instability and local infection. Patients with rectal cancer within 10 cm of the anal verge and low anterior resection with double-stapled technique were included consecutively. A stapler anastomosis was supplemented by trans-anal reinforcement and vacuum drainage using a povidone-iodine-soaked sponge. Modified reinforcement using a circular mucosa plication was developed and used. Patients were followed up by postoperative endoscopy and outcomes were acute leak rate, morbidity, and diversion rate. The procedure was successfully completed in 52 from 54 patients during time period January 2019–October 2020. The mean age of patients was 61 years (lower–upper quartiles 54–69 years). There were 38/52 (73%) males and 14/52 (27%) females; the neoadjuvant radiotherapy was indicated in a group of patients in 24/52 (46%). The mean level of anastomosis was 3.8 cm (lower–upper quartiles 3.00–4.88 cm). The overall morbidity was 32.6% (17/52) and Clavien–Dindo complications ≥ 3 grade appeared in 3/52 (5.7%) patients. No loss of anastomosis was recorded and no patient died postoperatively. The symptomatic anastomotic leak was recorded in 2 (3.8%) patients and asymptomatic blind fistula was recorded in one patient 1/52 (1.9%). Diversion ileostomy was created in 1/52 patient (1.9%). Reinforcement of double-stapled anastomosis using a circular mucosa plication with combination of vacuum povidone-iodine-soaked sponge drainage led to a low acute leak and diversion rate. This pilot study requires further investigation.

Registered at ClinicalTrials.gov.: Trial registration number is NCT04735107, date of registration February 2, 2021, registered retrospectively.

Short-Term and Long-Term Outcomes in Mid and Low Rectal Cancer With Robotic Surgery

Objective

To investigate the risk factors for postoperative complications and anastomotic leakage after robotic surgery for mid and low rectal cancer and their influence on long-term outcomes.

Methods

A total of 641 patients who underwent radical mid and low rectal cancer robotic surgery at Zhongshan Hospital Fudan University from January 2014 to December 2018 were enrolled in this study. The clinicopathological factors of the patients were collected. The risk factors for short-term outcomes of complications and anastomotic leakage were analyzed, and their influences on recurrence and overall survival were studied.

Results

Of the 641 patients, 516 (80.5%) underwent AR or LAR procedures, while 125 (19.5%) underwent the NOSES procedure. Only fifteen (2.3%) patients had stoma diversion. One hundred and seventeen patients (17.6%) experienced surgical complications. Anastomotic leakage occurred in 44 patients (6.9%). Eleven patients (1.7%) underwent reoperation within 90 days after surgery. Preoperative radiotherapy did not significantly increase anastomotic leakage in our study (7.4% vs. 6.8%, P = 0.869). The mean postoperative hospital stay was much longer with complication (10.4 vs. 7.1 days, P<0.05) and leakage (12.9 vs. 7.4 days, P < 0.05). Multivariate analysis showed that male sex (OR = 1.855, 95% CI: 1.175–2.923, P < 0.05), tumor distance 5 cm from the anus (OR = 1.563, 95% CI: 1.016–2.404, P < 0.05), and operation time length (OR = 1.563, 95% CI: 1.009–2.421, P < 0.05) were independent risk factors for complications in mid and low rectal cancer patients. The same results for anastomotic leakage: male sex (OR = 2.247, 95% CI: 1.126–4.902, P < 0.05), tumor distance 5 cm from the anus (OR = 2.242, 95% CI: 1.197–4.202, P < 0.05), and operation time length (OR = 2.114, 95% CI: 1.127–3.968, P < 0.05). The 3-year DFS and OS were 82.4% and 92.6% with complication, 88.4% and 94.0% without complication, 88.6% and 93.1% with leakage, and 87.0% and 93.8% without leakage, respectively. The complication and anastomotic leakage showed no significant influences on long-term outcomes.

Conclusion

Being male, having a lower tumor location, and having a prolonged operation time were independent risk factors for complications and anastomotic leakage in mid and low rectal cancer. Complications and anastomotic leakage might have no long-term impact on oncological outcomes for mid and low rectal cancer with robotic surgery.

A safe and feasible technique: laparoscopic manual binding technique for intracorporeal anastomosis in totally laparoscopic anterior resection of high-mid rectal cancer

BACKGROUND

Totally laparoscopic anterior resection (TLAC) is difficult even for experienced surgeons because of difficulties in fixating the anvil of circular stapling device with laparoscopy. We herein report a novel technique of laparoscopic manual binding technique (MBT) to conduct intracorporeal anastomosis by the double-stapling technique (DST) for high-mid rectal cancer.

METHODS

Since April 2019, MBT for intracorporeal anastomosis in TLAC were performed for 12 patients. After the total mesorectal excision, the anvil of a circular stapling device is put in the abdominal cavity through the anus and inserted into the proximal colonic stump. At the pre-anastomotic site, the intestinal wall of colon is fully fixated on the central rod of the anvil with surgical suture No. 0 by manual binding with laparoscopic instruments as laparoscopic grasping forceps, in addition, double binding if necessary. Then, the end of the colon and rectum is anastomosised by the double-stapling technique (DST).

RESULTS

A total of 12 patients completed the operation successfully. Only one patient experienced fever (T < 38.5 °C) after operation. No patients experienced surgical complications greater than Clavien-Dindo grade I.

CONCLUSIONS

We introduced the usefulness of the MBT to improve TLAC. MBT for intracorporeal anastomosis in TLAC for high-mid rectal cancer is safe and feasible.

A Retrospective Study of Risk Factors for Symptomatic Anastomotic Leakage after Laparoscopic Anterior Resection of the Rectal Cancer without a Diverting Stoma

Background

Anastomotic leakage (AL) is a common and devastating postoperative issue for patients who have undergone anterior resection of rectal carcinoma and can lead to increased short-term morbidity and mortality. Moreover, it might be associated with a worse oncological prognosis of tumors. This study is aimed at exploring the risk factors for symptomatic AL after laparoscopic anterior resection (LAR) for rectal tumors without a preventive diverting stoma.

Materials and Methods

This case control study retrospectively reviewed the data of 496 consecutive patients who underwent LAR of the rectum without a preventive diverting stoma at the Cancer Hospital, Chinese Academy of Medical Sciences between September 2016 and September 2017. All patients were divided into an AL group and a control group based on the occurrence of postoperative symptomatic AL. Factors regarding patient-related variables, operation-related variables, and tumor-related variables were collected and assessed between the two groups through univariate and multivariate logistic regression analyses to identify independent risk factors for AL.

Results

In total, 18 (3.6%) patients developed postoperative symptomatic AL. Univariate analysis showed that a synchronous primary malignancy of the left hemicolon (P = 0.047), intraoperative chemotherapy (P = 0.003), and level of anastomosis (P = 0.033) were significantly related with AL. Multivariate analysis was subsequently performed to adjust for confounding biases and confirmed that a synchronous primary malignancy of the left hemicolon (odds ratio (OR), 12.225; 95% confidence interval (CI), 1.764-84.702; P = 0.011), intraoperative chemotherapy (OR, 3.931; 95% CI, 1.334-11.583; P = 0.013), and level of anastomosis (OR, 3.224; 95% CI, 1.124-9.249; P = 0.030) were independent risk factors for symptomatic AL for patients who received LAR for rectal neoplasms without a preventive diverting stoma.

Conclusions

Synchronous primary malignancy of the left hemicolon, intraoperative chemotherapy, and a low anastomotic level can increase the risks of postoperative symptomatic AL after LAR of the rectum without a protective diverting stoma.

[Reinforcement of staple line of colorectal anastomosis for leakage prevention: a systematic review and metaanalysis]

OBJECTIVE

To evaluate the influence of reinforcement of staple line of colorectal anastomosis on the incidence of leakage.

MATERIAL AND METHODS

A systematic review was performed in accordance with the PRISMA recommendations. Statistical analysis was carried out in the Review Manager 5.3 software.

RESULTS

This trial included four original articles published in 2011-2018. There were 493 patients. Reinforcement of anastomosis was made in 232 (47%) cases, colorectal anastomosis was not reinforced in 261 (53%) patients. Anastomotic leakage rate was 5.6 and 11.1% in both groups, respectively (OR 0.55, CI 0.13-2.33; p=0.42). Transabdominal reinforcement reduced leakage rate by 10.2% (OR 0.18, CI 0.06-0.55; p=0.002) while transanal reinforcement was ineffective (OR 1.66, CI 0.38-7.19; p=0,5). Incidence of preventive stoma was similar (OR 0.3, CI 0.07-1.22; p=0.09), but it was possible to abandon preventive stoma in 18% of cases after anastomotic reinforcement.

CONCLUSION

A small number of studies dedicated to anastomosis reinforcement resulted controversial data.

Intraoperative intraperitoneal chemotherapy increases the incidence of anastomotic leakage after anterior resection of rectal tumors

BACKGROUND

Intraoperative intraperitoneal chemotherapy is an emerging treatment modality for locally advanced rectal neoplasms. However, its impacts on postoperative complications remain unknown. Anastomotic leakage (AL) is one of the most common and serious complications associated with the anterior resection of rectal tumors. Therefore, we designed this study to determine the effects of intraoperative intraperitoneal chemotherapy on AL.

AIM

To investigate whether intraoperative intraperitoneal chemotherapy increases the incidence of AL after the anterior resection of rectal neoplasms.

METHODS

This retrospective cohort study collected information from 477 consecutive patients who underwent an anterior resection of rectal carcinoma using the double stapling technique at our institution from September 2016 to September 2017. Based on the administration of intraoperative intraperitoneal chemotherapy or not, the patients were divided into a chemotherapy group (171 cases with intraperitoneal implantation of chemotherapy agents during the operation) or a control group (306 cases without intraoperative intraperitoneal chemotherapy). Clinicopathologic features, intraoperative treatment, and postoperative complications were recorded and analyzed to determine the effects of intraoperative intraperitoneal chemotherapy on the incidence of AL. The clinical outcomes of the two groups were also compared through survival analysis.

RESULTS

The univariate analysis showed a significantly higher incidence of AL in the patients who received intraoperative intraperitoneal chemotherapy, with 13 (7.6%) cases in the chemotherapy group and 5 (1.6%) cases in the control group (P = 0.001). As for the severity of AL, the AL patients who underwent intraoperative intraperitoneal chemotherapy tended to be more severe cases, and 12 (92.3%) out of 13 AL patients in the chemotherapy group and 2 (40.0%) out of 5 AL patients in the control group required a secondary operation (P = 0.044). A multivariate analysis was subsequently performed to adjust for the confounding factors and also showed that intraoperative intraperitoneal chemotherapy increased the incidence of AL (odds ratio = 5.386; 95%CI: 1.808-16.042; P = 0.002). However, the survival analysis demonstrated that intraoperative intraperitoneal chemotherapy could also improve the disease-free survival rates for patients with locally advanced rectal cancer.

CONCLUSION

Intraoperative intraperitoneal chemotherapy can improve the prognosis of patients with locally advanced rectal carcinoma, but it also increases the risk of AL following the anterior resection of rectal neoplasms.

Robotic versus laparoscopic rectal resection surgery: Short-term outcomes and complications: A retrospective comparative study

BACKGROUND

The safety of robotic-assisted surgery (RAS) remains a concern. This study aimed to compare the complications after RAS versus laparoscopic-assisted surgery (LAS) for rectal cancer using the Clavien-Dindo classification and to identify risk factors related to the complications.

METHOD

Between March 2010 and June 2016, 556 rectal cancer patients who underwent successful RAS and 1029 patients who received LAS were enrolled in this study. The complications were graded according to the Clavien-Dindo classification, and the possible risk factors related to the complications were analyzed.

RESULTS

The overall postoperative complication rate was 14.9%, with a 5% rate of severe complications that were classified as grade III or above in RAS group compared with 17.1% and 4.4% in LAS group. However, no significant difference was found (P = 0.608). A high ASA score was identified as an independent risk factor for overall and severe complications in both groups. The use of more than 3 staples in each operation and the anastomotic site of the anal verge at less than 5 cm were independent risk factors for complications.

CONCLUSIONS

RAS for rectal cancer is technically safe and it does not significantly improve the complication rate. The incidence of overall complications is still related to tumor location, the general condition of the patients, and the surgical approach.

Male sex and history of ischemic heart disease are major risk factors for anastomotic leakage after laparoscopic anterior resection in patients with rectal cancer

Background

Anastomotic leakage (AL) is the most serious and common complication of surgery for rectal cancer, and associated risk factors remain unknown despite developments in laparoscopic surgery. The present study aimed to determine risk factors for AL after laparoscopic anterior resection (AR) of rectal cancer.

Methods

This retrospective cohort study extracted information from a prospective database of all consecutive colorectal resections that proceeded at Nippon Medical School Hospital between January 2011 and December 2015 (n = 865). We identified 154 patients with rectal cancer treated by elective laparoscopic AR with anastomosis using primary double-stapling. Clinical variables and comorbidity, habits, and surgery-related variables were assessed by univariate and multivariate analyses to determine preoperative risk factors for clinical AL.

Results

The overall rate of clinical AL was 11.7% (18 of 154 patients), and 5 (27.8%) of 18 patients required revised laparotomy. Data from males were analyzed because AL occurred only in males. Univariate analysis of male patients (n = 100) significantly associated preoperative creatinine values (p = 0.03) and a history of ischemic heart disease (IHD) (p = 0.012) with AL. The frequency of AL tended to increase (p = 0.06) when patients had low AR (p = 0.06) and transanal drainage. Having AL significantly prolonged hospital stays compared with patients without leakage (36.2 vs. 11.1 days; p <  0.01). Multivariate analysis identified a history of IHD (odds ratio [OR], 4.73; 95% confidence interval [CI], 1.27–17.5; p = 0.025] as an independent risk factor for AL.

Conclusions

Male sex and a history of IHD are possible risk factors for AL after elective laparoscopic rectal cancer surgery.

Nomogram Prediction of Anastomotic Leakage and Determination of an Effective Surgical Strategy for Reducing Anastomotic Leakage after Laparoscopic Rectal Cancer Surgery

Background

Although many surgical strategies have been used to reduce the anastomotic leak (AL) rate after laparoscopic rectal cancer surgery, limited data are available on the risk factors for AL and the effective strategy to reduce AL.

Methods

The present study enrolled 736 consecutive patients who underwent laparoscopic resection without a diverting stoma for rectal adenocarcinoma. A nomogram was constructed to predict AL. Based on the nomogram, personalized risk was calculated and sequential surgical strategies were monitored using risk-adjusted cumulative sum (RA-CUSUM) analysis.

Results

Among the 736 patients, clinical AL occurred in 65 patients (8.8%). Sex, an American Society of Anesthesiologists score, operation time, blood transfusion, and tumor location were identified as significant predictive factors for AL. Based on these factors, a nomogram was created to predict AL, with a concordance index (C-index) of 0.753 (95% confidence interval, 0.690–0.816). A calibration plot showed good statistical performance on internal validation (bias-corrected C-index of 0.742). The RA-CUSUM curve showed that extended splenic flexure mobilization (SFM) could be the most influential strategy to reduce AL.

Conclusions

Our nomogram for predicting AL after laparoscopic rectal cancer surgery might be helpful to identify the individual risk of AL. Furthermore, extended SFM might be the most appropriate strategy for reducing AL.

Preoperative, intraoperative and postoperative risk factors for anastomotic leakage after laparoscopic low anterior resection with double stapling technique anastomosis

Anastomotic leakage (AL) is one of the most devastating complications after rectal cancer surgery. The double stapling technique has greatly facilitated intestinal reconstruction especially for anastomosis after low anterior resection (LAR). Risk factor analyses for AL after open LAR have been widely reported. However, a few studies have analyzed the risk factors for AL after laparoscopic LAR. Laparoscopic rectal surgery provides an excellent operative field in a narrow pelvic space, and enables total mesorectal excision surgery and preservation of the autonomic nervous system with greater precision. However, rectal transection using a laparoscopic linear stapler is relatively difficult compared with open surgery because of the width and limited performance of the linear stapler. Moreover, laparoscopic LAR exhibits a different postoperative course compared with open LAR, which suggests that the risk factors for AL after laparoscopic LAR may also differ from those after open LAR. In this review, we will discuss the risk factors for AL after laparoscopic LAR.

Impact of anal decompression on anastomotic leakage after low anterior resection for rectal cancer: a propensity score matching analysis

PURPOSE

The effectiveness of a transanal drainage tube for the prevention of anastomotic leakage (AL) is still uncertain. This study aimed to investigate the impact of anal decompression on AL after rectal cancer surgery.

METHODS

We retrospectively reviewed 536 rectal cancer patients who underwent low anterior resection without diverting stoma, with (n = 154) or without (n = 382) placing of a transanal drainage tube, between January 2005 and December 2014. Risk factors for AL were analyzed, and propensity score matching analysis was used to compensate for the differences in baseline characteristics.

RESULTS

AL occurred in 50 (9.3%) of the patients. Male sex (odds ratio [OR] 3.097, p = 0.005), high ASA score (OR 3.505, p = 0.025), and neoadjuvant chemoradiation (OR 2.506, p = 0.018) were independent predictors of AL on multivariable analysis. After propensity score matching, transanal drainage tube tended to lessen rates of grade C AL with definite peritonitis (1.9 vs. 5.8%, p = 0.077), although there was no difference in the incidence of AL in patients with or without transanal drainage tubes (5.8 vs. 9.1%, p = 0.278).

CONCLUSIONS

Placement of a transanal drainage tube was not associated with a reduction in the total incidence of AL after low anterior resection for rectal cancer.