Anastomotic leaks after intestinal anastomosis: it's later than you think

C-reactive protein level on postoperative day 3 as a predictor of anastomotic leakage after elective right-sided colectomy

PURPOSE

To investigate the factors predictive of anastomotic leakage in patients undergoing elective right-sided colectomy.

METHODS

The subjects of this retrospective study were 247 patients who underwent elective right hemicolectomy or ileocecal resection with ileocolic anastomosis between April 2012 and March 2019, at our institution.

RESULTS

Anastomotic leakage occurred in 9 of the 247 patients (3.6%) and was diagnosed on median postoperative day (POD) 7 (range POD 3-12). There were no significant differences in the background factors or preoperative laboratory data between the patients with anastomotic leakage (anastomotic leakage group) and those without anastomotic leakage (no anastomotic leakage group). Open surgery was significantly more common than laparoscopic surgery (P = 0.027), and end-to-side anastomosis was less common (P = 0.025) in the anastomotic leakage group. The C-reactive protein (CRP) level in the anastomotic leakage group was higher than that in the no anastomotic leakage group on PODs 3 (P < 0.001) and 5 (P < 0.001). ROC curve analysis revealed that anastomotic leakage was significantly more frequent in patients with a serum CRP level ≥ 11.8 mg/dL [area under the curve (AUC) 0.83].

CONCLUSION

A serum CRP level ≥ 11.8 mg/dL on POD 3 was predictive of anastomotic leakage being detected on median POD 7.

Serial assessment of inflammatory parameters for prediction of septic complications following surgery for colorectal endometriosis : A descriptive, retrospective study

Purpose

To assess whether C‑reactive protein (CRP), white blood cell count (WBC) and body temperature changes are suitable parameters for the early detection of septic complications following resection of colorectal deep endometriosis (DE).

Methods

Retrospective data analysis of CRP, WBC and body temperature courses following colorectal surgery for DE at a tertiary referral center for endometriosis.

Results

Out of 183 surgeries performed, 10 major surgical complications were observed, including 4 anastomotic leakages (AL 2%) and 2 rectovaginal fistulae (RVF 1%). In the presence of a lower gastrointestinal tract (GIT)-related septic complication or abdominal wall abscess, serum CRP levels were increased starting at postoperative day 2–3. A cut-off value of 10 mg/dl on day 4 for prediction of early septic complications could be verified (area under the curve 0.94, obtained by receiver operating characteristics analysis, sensitivity 88%, specificity 90%, positive predictive value 32%, negative predictive value 99%). Additionally, most patients with early septic complications exhibited increased WBC levels starting mainly from day 3–4; however, increased inflammatory parameters could not be observed in one patient with an RVF. Body temperature did not prove useful for early discrimination between uncomplicated cases and those with early septic complications.

Conclusion

Relevant elevations of serum CRP and WBC levels were demonstrated in patients with early septic complications following surgery for colorectal DE starting at postoperative day 2–4. The cut-off value of 10 mg/dl for CRP levels may serve as an early predictor for lower GIT-related septic complications but should be used with caution in women with suspected RVF development.

Supplementary Information

The online version of this article (10.1007/s00508-021-01916-w) contains supplementary material, which is available to authorized users.

Perfusion Assessment in Left-Sided/Low Anterior Resection (PILLAR III): A Randomized, Controlled, Parallel, Multicenter Study Assessing Perfusion Outcomes With PINPOINT Near-Infrared Fluorescence Imaging in Low Anterior Resection

BACKGROUND

Indocyanine green fluoroscopy has been shown to improve anastomotic leak rates in early phase trials.

OBJECTIVE

We hypothesized that the use of fluoroscopy to ensure anastomotic perfusion may decrease anastomotic leak after low anterior resection.

DESIGN

We performed a 1:1 randomized controlled parallel study. Recruitment of 450 to 1000 patients was planned over 2 years.

SETTINGS

This was a multicenter trial.

PATIENTS

Included patients were those undergoing resection defined as anastomosis within 10 cm of the anal verge.

INTERVENTION

Patients underwent standard evaluation of tissue perfusion versus standard in conjunction with perfusion evaluation using indocyanine green fluoroscopy.

MAIN OUTCOME MEASURES

Primary outcome was anastomotic leak, with secondary outcomes of perfusion assessment and the rate of postoperative abscess requiring intervention.

RESULTS

This study was concluded early because of decreasing accrual rates. A total of 25 centers recruited 347 patients, of whom 178 were randomly assigned to perfusion and 169 to standard. The groups had comparable tumor-specific and patient-specific demographics. Neoadjuvant chemoradiation was performed in 63.5% of perfusion and 65.7% of standard (p > 0.05). Mean level of anastomosis was 5.2 ± 3.1 cm in perfusion compared with 5.2 ± 3.3 cm in standard (p > 0.05). Sufficient visualization of perfusion was reported in 95.4% of patients in the perfusion group. Postoperative abscess requiring surgical management was reported in 5.7% of perfusion and 4.2% of standard (p = 0.75). Anastomotic leak was reported in 9.0% of perfusion compared with 9.6% of standard (p = 0.37). On multivariate regression analysis, there was no difference in anastomotic leak rates between perfusion and standard (OR = 0.845 (95% CI, 0.375-1.905); p = 0.34).

LIMITATIONS

The predetermined sample size to adequately reduce the risk of type II error was not achieved.

CONCLUSIONS

Successful visualization of perfusion can be achieved with indocyanine green fluoroscopy. However, no difference in anastomotic leak rates was observed between patients who underwent perfusion assessment versus standard surgical technique. In experienced hands, the addition of routine indocyanine green fluoroscopy to standard practice adds no evident clinical benefit. See Video Abstract at http://links.lww.com/DCR/B560.

VALORACIN DE LA IRRIGACIN DE LADO IZQUIERDO/RESECCIN ANTERIOR BAJA PILAR III UN ESTUDIO ALEATORIZADO, CONTROLADO, PARALELO Y MULTICNTRICO QUE EVALA LOS RESULTADOS DE LA IRRIGACIN CON PINPOINT IMGENES DE FLUORESCENCIA CERCANA AL INFRARROJO EN LA RESECCIN ANTERIOR BAJA

ANTECEDENTES:Se ha demostrado que la fluoroscopia con verde de indocianina mejora las tasas de fuga anastomótica en ensayos en fases iniciales.OBJETIVO:Nuestra hipótesis es que la utilización de fluoroscopia para asegurar la irrigación anastomótica puede disminuir la fuga anastomótica luego de una resección anterior baja.DISEÑO:Realizamos un estudio paralelo, controlado, aleatorizado 1:1. Se planificó el reclutamiento de 450-1000 pacientes durante 2 años.AMBITO:Multicéntrico.PACIENTES:Pacientes sometidos a resección definida como una anastomosis dentro de los 10cm del margen anal.INTERVENCIÓN:Pacientes que se sometieron a la evaluación estándar de la irrigación tisular contra la estándar en conjunto con la valoración de la irrigación mediante fluoroscopia con verde indocianina.PRINCIPALES VARIABLES EVALUADAS:El principal resultado fue la fuga anastomótica, y los resultados secundarios fueron la evaluación de la perfusión y la tasa de absceso posoperatorio que requirió intervención.RESULTADOS:Este estudio se cerró anticipadamente debido a la disminución de las tasas de acumulación. Un total de 25 centros reclutaron a 347 pacientes, de los cuales 178 fueron, de manera aleatoria, asignados a perfusión y 169 a estándar. Los grupos tenían datos demográficos específicos del tumor y del paciente similares. Recibieron quimio-radioterapia neoadyuvante el 63,5% de la perfusión y el 65,7% del estándar (p> 0,05). La anastomosis estuvo en un nivel promedio de 5,2 + 3,1 cm en perfusión en comparación con 5,2 + 3,3 cm en estándar (p> 0,05). Se reportó una visualización suficiente de la perfusión en el 95,4% de los pacientes del grupo de perfusión. El absceso posoperatorio que requirió tratamiento quirúrgico fue de 5,7% de los perfusion y en el 4,2% del estándar (p = 0,75). Se informó fuga anastomótica en el 9,0% de la perfusión en comparación con el 9,6% del estándar (p = 0,37). En el análisis de regresión multivariante, no hubo diferencias en las tasas de fuga anastomótica entre la perfusión y el estándar (OR 0,845; IC del 95% (0,375; 1,905); p = 0,34).LIMITACIONES:No se logró el tamaño de muestra predeterminado para reducir satisfactoriamente el riesgo de error tipo II.CONCLUSIÓN:Se puede obtener una visualización adecuada de la perfusión con ICG-F. Sin embargo, no se observaron diferencias en las tasas de fuga anastomótica entre los pacientes que se sometieron a evaluación de la perfusión versus la técnica quirúrgica estándar. En manos expertas, agregar ICG-F a la rutina de la práctica estándar no agrega ningún beneficio clínico evidente. Consulte Video Resumen en http://links.lww.com/DCR/B560. (Traducción-Dr Juan Antonio Villanueva-Herrero).

Postoperative complications of colorectal cancer

Colorectal cancer is the third most common cancer, and surgery is the most common treatment. Several surgical options are available, but each is associated with a range of potential complications. The timely and efficient identification of these complications is vital for effective clinical management of these patients in order to minimise their morbidity and mortality. This review aims to describe the range of commonly performed surgical treatments for colorectal surgery. In addition, frequent post-surgical complications are explored with investigative options explained and illustrated.

Early User Centred Design during development of an innovative medical device: case study of a connected Sensor System in colorectal surgery (Preprint)

Background

A successful innovative medical device is not only technically challenging to develop but must also be readily usable to be integrated into health care professionals’ daily practice. Through a user-centered design (UCD) approach, usability can be improved. However, this type of approach is not widely implemented from the early stages of medical device development.

Objective

The case study presented here shows how UCD may be applied at the very early stage of the design of a disruptive medical device used in a complex hospital environment, while no functional device is available yet. The device under study is a connected sensor system to detect colorectal anastomotic leakage, the most detrimental complication following colorectal surgery, which has a high medical cost. We also aimed to provide usability guidelines for the initial design of other innovative medical devices.

Methods

UCD was implemented by actively involving health care professionals and all the industrial partners of the project. The methodology was conducted in 2 European hospitals: Grenoble-Alpes University Hospital (France) and Erasmus Medical Center Rotterdam (the Netherlands). A total of 6 elective colorectal procedures and 5 ward shifts were observed. In total, 4 workshops were conducted with project partners and clinicians. A formative evaluation was performed based on 5 usability tests using nonfunctional prototype systems. The case study was completed within 12 months.

Results

Functional specifications were defined for the various components of the medical device: device weight, size, design, device attachment, and display module. These specifications consider the future integration of the medical device into current clinical practice (for use in an operating room and patient follow-up inside the hospital) and interactions between surgeons, nurses, nurse assistants, and patients. By avoiding irrelevant technical development, this approach helps to promote cost-effective design.

Conclusions

This paper presents the successful deployment over 12 months of a UCD methodology for the design of an innovative medical device during its early development phase. To help in reusing this methodology to design other innovative medical devices, we suggested best practices based on this case.

The role of CRP in the diagnosis of postoperative complications in rectal surgery

Postoperative complications of rectal resections classified as grade III or higher according to Clavien-Dindo system, which also include anastomotic leaks, are usually life-threatening conditions. Delayed diagnosis may account for almost 18% of deaths. Due to nonspecific clinical signs in the early postoperative period, diagnosing these complications may truly be a challenge for clinicians. Nowadays, with the implementation of the ERAS protocol (enhanced recovery after surgery) and efforts concentrated on quickly delivered treatment to patients suffering from the above-mentioned complications, an appropriate marker with high specificity is required. Postoperative levels of C-reactive protein in blood serum seem promising in this aspect. The presented study aimed to determine the cut-off level of serum C-reactive protein as a possible predictive factor for early diagnosis of serious postoperative complications associated with rectal resections. This could also lead clinicians to the diagnosis of anastomotic leak after other possible options are ruled out. This study is a retrospective observational analysis of patients who underwent open resection of rectal cancer during a one-year period. Collected data included risk factors (age, gender, BMI, bowel preparation), record of complications and C Reactive Protein (CRP) serum levels. The study included 162 patients. Uncomplicated postoperative course was observed in 58 patients (35.8%). Complications were present in 104 cases (64.2%), including surgical site infections (16.7%) and anastomotic leak (9.9%). The mortality rate was 2.5%. Serum CRP threshold predicting relevant complications reached a sensitivity of 83.3% and specificity of 82.7% on POD 4, with a 175.4 mg/L cut-off value, burdened with a 95.7% negative predictive value. Postoperative serum C-reactive protein may be used as a good predictor of infectious complications, including anastomotic leaks. Measuring CRP levels in the early postoperative period may facilitate identification oflow-risk patients ensure early and safe discharges from hospital after rectal resections.

Impact of Deserosalization on Small Bowel Anastomosis Healing in Swine: A Pilot Study

BACKGROUND

Healing is related to gastrointestinal anastomotic leak, which is a severe and common complication. This study aimed to investigate the feasibility and the impact of deserosalization on healing of jejuno-jejunal anastomoses in an animal model.

MATERIALS AND METHODS

Seven swine underwent three types of side-to-side jejuno-jejunal anastomosis twice and survived seven days. Three different types of jejuno-jejunal side-to-side anastomoses were performed twice at 20-cm distance from each other in each animal: no serosa removal, one-sided, and two-sided serosa removal, respectively. Bursting pressure, tissue hydroxyproline concentration, and pathology scores were evaluated.

RESULTS

Hydroxyproline tissue concentration was a mean±standard deviation of 0.37±0.09, 0.38±0.08, and 0.30±0.05 nmoI/ml respectively (p<0.05). Bursting pressure was a mean±standard deviation of 59.02±8.60, 73.20±11.09, and 100.01±7.49 mmHg, respectively (p<0.001). The histopathological assessment did not find any statistically significant differences.

CONCLUSION

Deserosalization in jejuno-jejunal anastomosis was technically feasible and seemed to improve mechanical strength and collagen deposition in this experimental porcine model. Further investigation is warranted.

The use of Indocyanine green fluorescent in patients with abdominal trauma for better intraoperative decision-making and less bowel anastomosis leak: case series

Despite technological advances in the management of blunt abdominal trauma, the rate of bowel anastomotic leakage (AL) remains high. The etiology of AL is multifactorial, but insufficient blood perfusion is considered to play a substantial role in the pathogenesis. In recent years, angiography with Indocyanine green (ICG), a fluorescent dye, has been introduced in the clinical practice to assess organ perfusion in several conditions. Given the scarcity of publications describing the use of ICG in trauma patients as a potentially useful strategy that may facilitate intraoperative decisions and limit the extent of bowel resection, we presented the utility of intraoperative ICG fluorescent in abdominal trauma patients in a level 1 trauma center. The use of ICG fluoroscopy in patients with abdominal trauma is feasible and useful; however, large prospective studies in trauma patients are warranted.

C reactive protein to albumin ratio (CAR) as predictor of anastomotic leakage in colorectal surgery

BACKGROUND

Anastomotic leakage (AL) is one of the most severe complications in colorectal surgery. Currently, no predictive biomarkers of AL are available. The aim of this study was to investigate the role of C reactive protein (CRP) to albumin ratio (CAR) as a predictor of AL in patients undergoing elective surgery for colorectal cancer.

MATERIALS AND METHODS

Data on 1183 consecutive patients surgically treated for histologically proven colorectal cancer in the surgical units involved in the study were collected. Data included sex, age, BMI, ASA score, Charlson comorbidity index, localization, histology and stage of the disease, as well as blood tests including albumin and CRP at the 4th postoperative day. Differences in CAR between patients who developed AL and those who did not were analyzed, and the ability of CAR to predict AL was investigated with ROC analysis.

RESULTS

CAR was significantly higher in patients with AL in comparison to those without, at the 4th postoperative day. In ROC analysis CAR showed a good ability in detecting AL (AUC 0.825, 95%CI: 0,786-0,859), greater than those of CRP and albumin alone. CAR also showed a high ability in detecting postoperative deaths (AUC 0.750, 95% CI 0,956-0,987). These findings were confirmed in multivariate analysis including the most relevant risk factors for AL.

CONCLUSION

Our study evidenced that CAR, an inexpensive and widely available laboratory biomarker, adequately predicts AL and death in patients who underwent elective surgery for colorectal cancer.

Early prediction of anastomotic leakage after laparoscopic rectal surgery using creactive protein

At present, anterior resection of the rectum or transabdominal rectal resection is the most common surgical technique for rectal cancer. Laparoscopic techniques are popular, and the efficacy and safety of laparoscopic rectal surgery have been confirmed. However, postoperative anastomotic leakage is a common, severe complication that leads to high mortality. Thus, early diagnosis of anastomotic leakage is important for reducing clinical consequences.The aim of this study was to determine whether C-reactive protein (CRP) is a good predictor of anastomotic leakage in laparoscopic transabdominal rectal resection.Our retrospective study involved a series of 196 rectal cancer patients who underwent laparoscopic transabdominal rectal resection without ileostomy between May 2013 and April 2015 at the Sir Run Run Shaw Hospital, Zhejiang University College of Medicine. The following patient data were collected: demographic data, manifestations of the complication, CRP levels and neutrophil percentage during the first 7 postoperative days.Anastomotic leakage was detected in 11 patients (5.6%). Each group showed significant differences (P < .05) in CRP levels on postoperative days 3 to 7; compared with other groups, the anastomotic leakage group showed significant differences in CRP levels (P < .05) on postoperative day 6. When patients were divided into groups with or without anastomotic leakage, CRP was a reliable predictor on postoperative days 4 to 7 (P < .05, area under the curve > 0.800). The best combination was CRP on postoperative day 6 (area under the curve = 0.932) with a cut-off of 76.6 mg/L, resulting in a sensitivity of 83.3%, a specificity of 94.6% and a negative predictive value of 99%.CRP is a reliable predictor of anastomotic leakage after laparoscopic transabdominal rectal resection surgery. High CRP levels on postoperative days 4 to 7 indicate the need for a more careful patient evaluation.

Non-steroidal anti-inflammatory agents and anastomotic leak rates across colorectal cancer operations and anastomotic sites: A systematic review and meta-analysis of anastomosis specific leak rate and confounding factors

BACKGROUND

Surgical intervention presents a fundamental therapeutic choice in the management of colorectal malignancies. Complications, the most serious one being anastomotic leak (AL), still have detrimental effects upon patients' morbidity and mortality. We aimed to assess whether NSAIDs, and their sub-categories, increase AL in colonic anastomoses and to identify whether this affects specific anastomotic sites.

MATERIALS AND METHODS

A systematic search of MEDLINE, Cochrane Library, ClinicalTrials.gov, Web of Science, Science Direct, Google Scholar was conducted between January 1, 1999 till the October 30, 2020. Cohort studies and randomized control trials examining AL events in NSAID-exposed, colorectal cancer patients were included. NSAIDs were grouped according to the 2019 NICE guidelines in non-specific (NS-NSAIDs) and specific COX-2 inhibitors. The primary outcome was AL events in NSAID-exposed patients undergoing operations with either ileocolic, colocolic or colorectal anastomoses. Secondary outcomes included NSAID category-specific AL events and demographic confounding factors increasing AL risk in this patient population.

RESULTS

Fifteen studies involving 25,395 patients were included in the systematic review and meta-analysis. Of all anastomoses, colocolic anastomoses were found to be statistically more prone to AL events in the NS-NSAID-exposed population [OR 3.24 (95% CI 0.98-10.72), p = 0.054]. Male gender was an independent confounder increasing AL rate regardless of NSAID exposure.

CONCLUSION

The association between NSAID exposure and AL in oncology patients remains undetermined. Whilst in present work, colocolic anastomoses appear to be more sensitive to AL events, the observed association may be anastomotic site and NSAID-category dependent.

Quantitative dynamic near-infrared fluorescence imaging using indocyanine green for analysis of bowel perfusion after mesenteric resection

SIGNIFICANCE

Near-infrared (NIR) fluorescence imaging using indocyanine green (ICG) has proven to be a feasible application for real-time intraoperative assessment of tissue perfusion, although quantification of NIR fluorescence signals is pivotal for standardized assessment of tissue perfusion.

AIM

Four patients are described with possible compromised bowel perfusion after mesenteric resection. Based on these patients we want to emphasize the difficulties in the quantification of NIR fluorescence imaging for perfusion analysis.

APPROACH

During image-guided fluorescence assessment, 5 mg of ICG (2.5  mg  /  ml) was intravenously administered by the anesthesiologist. NIR fluorescence imaging was done with the open camera system of Quest Medical Imaging. Fluorescence data taken from the regions of interest (bowel at risk, transition zone of bowel at risk and adjacent normally perfused bowel, and normally perfused reference bowel) were quantitatively analyzed after surgery for fluorescence intensity-and perfusion time-related parameters.

RESULTS

Bowel perfusion, as assessed clinically by independent surgeons based on NIR fluorescence imaging, resulted in different treatment strategies, three with excellent clinical outcome, but one with a perfusion related complication. Post-surgery quantitative analysis of fluorescence dynamics showed different patterns in the affected bowel segment compared to the unaffected reference segments for the four patients.

CONCLUSIONS

Similar intraoperative fluorescence results could lead to different surgical treatment strategies, which demonstrated the difficulties in interpretation of uncorrected fluorescence signals. Real-time quantification and standardization of NIR fluorescence perfusion imaging could probably aid surgeons in the nearby future.

Predictive and Diagnostic Biomarkers of Anastomotic Leakage: A Precision Medicine Approach for Colorectal Cancer Patients

Development of an anastomotic leak (AL) following intestinal surgery for the treatment of colorectal cancers is a life-threatening complication. Failure of the anastomosis to heal correctly can lead to contamination of the abdomen with intestinal contents and the development of peritonitis. The additional care that these patients require is associated with longer hospitalisation stays and increased economic costs. Patients also have higher morbidity and mortality rates and poorer oncological prognosis. Unfortunately, current practices for AL diagnosis are non-specific, which may delay diagnosis and have a negative impact on patient outcome. To overcome these issues, research is continuing to identify AL diagnostic or predictive biomarkers. In this review, we highlight promising candidate biomarkers including ischaemic metabolites, inflammatory markers and bacteria. Although research has focused on the use of blood or peritoneal fluid samples, we describe the use of implantable medical devices that have been designed to measure biomarkers in peri-anastomotic tissue. Biomarkers that can be used in conjunction with clinical status, routine haematological and biochemical analysis and imaging have the potential to help to deliver a precision medicine package that could significantly enhance a patient's post-operative care and improve outcomes. Although no AL biomarker has yet been validated in large-scale clinical trials, there is confidence that personalised medicine, through biomarker analysis, could be realised for colorectal cancer intestinal resection and anastomosis patients in the years to come.

Double-layered Nanofibrous Patch for Prevention of Anastomotic Leakage and Peritoneal Adhesions, Experimental Study

BACKGROUND/AIM

Anastomotic leakage is a feared complication in colorectal surgery. Postoperative peritoneal adhesions can also cause life-threatening conditions. Nanofibrous materials showed their pro-healing properties in various studies. The aim of the study was to evaluate the impact of double-layered nanofibrous materials on anastomotic healing and peritoneal adhesions formation.

MATERIALS AND METHODS

Two versions of double-layered materials from polycaprolactone and polyvinyl alcohol were applied on defective anastomosis on the small intestine of healthy pigs. The control group remained with uncovered defect. Tissue specimens were subjected to histological analysis and adhesion scoring after 3 weeks of observation.

RESULTS

The wound healing was inferior in the experimental groups, however, no anastomotic leakage was observed and the applied material always kept covering the defect. The extent of adhesions was larger in the experimental groups.

CONCLUSION

Nanofibrous materials may prevent anastomotic leakage but delay healing.

Laparoscopic colorectal resection for deep infiltrating endometriosis: can we reliably predict anastomotic leakage and major postoperative complications in the early postoperative period?

BACKGROUND

Anastomotic leakage (AL) and major complications after colorectal resection for deep infiltrating endometriosis (DIE) have a remarkable impact on patient outcomes. The aim of this study is to assess the predictive value of C-reactive protein (CRP), procalcitonin (PCT), white blood cell count (WBCs) and the Dutch Leakage Score (DLS) as reliable markers in the early diagnosis of AL and major complications after laparoscopic colorectal resection for DIE.

METHODS

262 consecutive women undergoing laparoscopic colorectal resection for DIE between September 2017 and September 2018 were prospectively enrolled. WBCs, CRP, PCT and DLS were recorded at baseline and on postoperative day (POD) 2, 3 and 6 then statistically analyzed as predictors of AL and severe postoperative complications.

RESULTS

The AL rate was 3.2%. The major morbidity rate was 11.2%. No postoperative mortality was recorded. The postoperative trend of DLS and serum levels of CRP and PCT, but not WBCs, were significantly higher in women developing AL and severe complications. DLS had better sensitivity and specificity than biomarkers on all postoperative days as a predictor of AL and major complications. CRP and PCT have a low positive predictive value (PPV) and a high negative predictive value (NPV) for AL and major complications on POD3 and POD6. The risk of malnutrition was significantly related to AL.

CONCLUSIONS

The combination of DLS as a standardized postoperative clinical monitoring system and CRP and PCT as serum biomarkers, allows the exclusion of AL and major complications in the early postoperative period after laparoscopic colorectal resection for DIE, thus ensuring a safe patient discharge.

Role of serum C-reactive protein and interleukin-6 as a predictor of intra-abdominal and surgical site infections after elective abdominal surgery

Introduction:

Infections after surgeries considerably increase patients' hospital stay, thereby prolonging patients' early return to productive life. At the same time, the cost of hospitalization also increases. Therefore, if objective tests can predict infections before it actually happens, then more preventive measures in the form of upgrading antibiotics can be taken which might prevent patients from developing serious infections and thereby reduce morbidity and mortality of surgery.

Material and Methods:

It was a prospective cross sectional study to assess the efficacy of acute phase reactants C-reactive protein (CRP) and interleukin 6 (IL 6) in predicting infections in patients undergoing routine general surgical operations. A total of 74 patients were included in the study. Laparoscopic surgical procedures were not included in the study to maintain uniformity in the procedures. Data so collected were analyzed by using SPSS version 22.

Results:

A total of 27 patients developed wound infections postoperatively. The mean rise in the levels of CRP and IL 6 was higher in those patients who developed postoperative wound infections. The positive predictive value and negative predictive value was found to be better with IL 6 than with CRP.

Conclusion:

It may be concluded that a serial estimation of CRP and IL 6 postoperatively can predict infections and may be utilized routinely in general surgical practice.

Influence of anastomoses on intestine ischemia and cefuroxime concentrations: Evaluated in the ileum and colon in a porcine model

BACKGROUND

Anastomotic leakage is a serious complication following gastrointestinal surgery and is associated with increased morbidity and mortality. The incidence of anastomotic leakage is determined by anatomy and is reported to be between 4%-33% for colon anastomosis and 1%-3% for small intestine anastomosis. The etiology of anastomotic leakage of the intestine has been divided into three main factors: healing disturbances, communication between intra- and extra-luminal compartments, and infection. All three factors interact, and one factor will inevitably lead to the other two factors resulting in tissue ischemia, tissue necrosis, and anastomotic leakage.

AIM

To evaluate ischemic metabolites and cefuroxime concentrations in both anastomosis and non-anastomosis ileum and colon in a porcine model.

METHODS

Eight healthy female pigs (Danish Landrace breed, weight 58-62 kg) were included in this study. Microdialysis catheters were placed for sampling of ischemic metabolites (glucose, lactate, glycerol, and pyruvate) and cefuroxime concentrations in both anastomosis and non-anastomosis ileum and colon. Cefuroxime 1.5 g was administered as an intravenous infusion over 15 min. Subsequently, dialysates and blood samples were collected over 8 h and the ischemic metabolites and cefuroxime concentrations were quantified in all samples. The concentrations of glucose, lactate, glycerol and pyruvate were determined using the CMA 600 Microdialysis Analyzer with Reagent Set A (M Dialysis AB, Sweden), and the concentrations of cefuroxime and meropenem were quantified using a validated ultra-high-performance liquid chromatography assay.

RESULTS

Only the colon anastomosis induced mean ischemic lactate/pyruvate ratios above 25 (ischemic cut-off) throughout the entire sampling interval, and simultaneously decreased glucose concentrations. The mean time for which cefuroxime concentrations were maintained above the clinical breakpoint minimal inhibitory concentration for Escherichia coli (8 µg/mL) ranged between 116-128 min across all the investigated compartments, and was similar between the anastomosis and non-anastomosis ileum and colon. For all pigs and in all the investigated compartments, a cefuroxime concentration of 8 µg/mL was reached within 10 min after administration. When comparing the pharmacokinetic parameters between the anastomosis and non-anastomosis sites for both ileum and colon, only colon T_max and half-life differed between anastomosis and non-anastomosis (P < 0.03). Incomplete tissue penetrations were found in all tissues except for the non-anastomosis colon.

CONCLUSION

Administering 1.5 g cefuroxime 10 min prior to intestine surgery seems sufficient, and effective concentrations are sustained for approximately 2 h. Only colon anastomosis was locally vulnerable to ischemia.

Colorectal anastomosis during cytoreductive radical surgery in patients with peritoneal surface malignancies. Validation of a new technique (without stoma) to prevent anastomosis leakage in more than 1000 procedures

OBJECTIVE

To describe a novel end-to-end "true" reinforced stapling colorectal anastomosis and to assess surgical outcomes in a large case series of advanced cancer patients undergoing this procedure. Anastomotic leakage (AL) remains the main concern following surgery for colorectal cancer.

METHODS

Between September 2006 and May 2018, in the context of the Catalonian Program of Peritoneal Carcinomatosis, 1193 consecutive patients with advanced abdominal and/or pelvic tumors were included in a prospective single-center study. They underwent cytoreductive radical surgery (CRS) in most cases combined with hyperthermic intraperitoneal chemotherapy (HIPEC). Among other surgical procedures, 374 patients underwent rectal resection and colorectal/ileorectal anastomosis, whether alone or associated to other digestive anastomosis. Key aspects of colorectal anastomosis technique were: (1) complete dissection and mobilization of the distal third of the rectum, (2) placement of a stitch that included both ends of the linear stapling of the rectal stump that was knotted on the anvil of the circular stapler, (3) "cleaning" the fatty tissue of the intestinal ends, (4) adjustment of the height of staples to the thickness of the intestinal wall, and (5) a second layer of interrupted nonperforating sutures placed circumferentially to reinforce the stapled anastomoses. A diverting stoma was not performed.

RESULTS

According to clinical criteria, of the 1193 patients included, 296 cases underwent CRS (group 1) and 897 cases CRS + HIPEC (group 2). In group 1, 332 surgical procedures were performed, with 248 digestive anastomoses, of which 98 (39.5%) were colorectal anastomoses, associated to other digestive anastomosis in 37 cases. In group 2, 972 surgical procedures were performed, with 707 digestive anastomoses, of which 263 were colorectal (37.2%), 116 were associated with other digestive anastomosis. Ileocolic anastomosis was the most frequently associated digestive anastomosis. 71 major urinary reconstructions, 283 radical hysterectomies and no diverting stoma were performed. Globally, there was only three colo-ileorectal AL (3/374 = 0.8%). The overall 90-day mortality rate was 0.25%.

CONCLUSIONS

A technical modification to create a "true" end-to-end and completely circular reinforced anastomosis effectively prevents anastomotic leakage in patients with advanced tumors undergoing radical resection of the rectum, with no need of diverting stoma.

Multilayered Human Skeletal Muscle Myoblast Sheets Promote the Healing Process After Colonic Anastomosis in Rats

Colorectal anastomotic leakage is one of the most feared and fatal complications of colorectal surgery. To date, no external coating material that can prevent anastomotic leakage has been developed. As myoblasts possess anti-inflammatory capacity and improve wound healing, we developed a multilayered human skeletal muscle myoblast (HSMM) sheet by periodic exposure to supraphysiological hydrostatic pressure during repeated cell seeding. We assessed whether the application of an HSMM sheet can promote the healing process after colonic anastomosis. Partial colectomy and insufficient suturing were employed to create a high-risk colo-colonic anastomosis model in 60 nude rats. Rats were divided into a control group (n = 30) and an HSMM sheet group (n = 30). Macroscopic findings, anastomotic bursting pressure, and histology at the colonic anastomotic site were evaluated on postoperative day (POD) 3, 5, 7, 14, and 28. The application of an HSMM sheet significantly suppressed abscess formation at the anastomotic site compared to the control group on POD3 and 5. The anastomotic bursting pressure in the HSMM sheet group was higher than that in the control group on POD3 and 5. Inflammatory cell infiltration in the HSMM sheet group was significantly suppressed compared to that in the control group throughout the time course. Collagen deposition in the HSMM sheet group on POD3 was significantly abundant compared to that in the control group. Regeneration of the mucosa at the colonic anastomotic site was promoted in the HSMM sheet group compared to that in the control group on POD14 and 28. Immunohistochemical analysis demonstrated that surviving cells in the HSMM sheet gradually decreased with postoperative time and none were detected on POD14. These results suggest that the application of a multilayered HSMM sheet may prevent postoperative colonic anastomotic leakage.

The Usefulness of an Endoscopic OverStitch Suturing System for Managing Anastomotic Dehiscence - A Case Report

Anastomotic dehiscence (AD) after colorectal surgery contributes to poor outcomes resulting in multiple postoperative complications. Conventional management would be a repeat laparotomy and tension suturing. But owing to the unhealthy vicinities near the suture lines, there is a significant risk of technical failure which further increases postoperative morbidity and mortality. A 60-year-old male, with a history of hypertension, ischemic heart disease, and previous percutaneous transluminal coronary angioplasty, underwent sigmoid colectomy with colorectal anastomosis for complicated sigmoid diverticulitis. He then developed anastomotic site leak for which an ileostomy was done. Prior to the ileostomy revision, he was referred for colonoscopic evaluation which showed the persistence of a partial AD. We decided to close the defect endoscopically with the Apollo OverStitch device. Initial tissue preparation was done by creating a surgical surface using argon plasma coagulation at the perimeter of the leak site. A double channel therapeutic endoscope with the OverStitch assembly was passed to take full-thickness running sutures across the rent to facilitate full closure. The area examined showed good suture approximation and complete closure. The procedure was successful with no immediate or delayed postprocedural complications. Repeat endoscopic evaluation at about two weeks showed well-approximated edges with intact suture lines, and there was complete resolution of the leak. The patient subsequently underwent revision surgery after a month. The patient is under close follow-up and doing well. The Apollo OverStitch device has certainly opened new avenues in flexible endoscopic surgery which need further exploratory studies to add to existing promising results.

Anastomosis Leak: Is There Still a Place for Indocyanine Green Fluorescence Imaging in Colon-Rectal Surgery? A Retrospective, Propensity Score-Matched Cohort Study

Anastomotic leakage (AL) represents one of the most relevant complications of colorectal cancer surgery. The aim of this study was to evaluate the utility of intraoperative indocyanine green (ICG) fluorescence imaging in the prevention of AL during laparoscopic colorectal surgery. Methods. We retrospectively analyzed 272 patients who underwent rectal and left colon surgery, consecutively enrolled between 2015 and 2019. Due to the heterogeneity of our groups, a propensity score matching (PSM) was performed with a 1:1 PSM cohort. Results. AL occurred in 36 (13.2%) patients. One hundred seventy-seven (65%) of them underwent an intraoperatory ICG test (ICG-group), whereas 95 patients (35%) did not receive the intraoperatory ICG test (no-ICG group). AL occurred in 10.8% of ICG group patients and in 17.8% of no-ICG group patients (P = 0.07). The ICG group registered significantly less type B and type C fistulas than the no-ICG group (57.9 vs 88.2%; P = .043). After PSM, the overall AL rate was less in the ICG group than the no-ICG group (9.3% vs 16%; P = 0.058), while type B and type C fistulas occurred in 5.48% in the ICG group vs 13.70% in the no-ICG group (P = 0.09). Univariate analysis demonstrated a protective effect of intraoperative ICG imaging against AL occurrence (odds ratio (OR: 0.66)). Conclusions. Hypoperfusion is a well-recognized cause of AL. The ICG assessment of colic vascularization is a simple, inexpensive, and side effects free method, which can sensibly reduce both overall AL and type B and type C fistulas when routinely used.

The Effect of Day of the Week on Morbidity and Mortality From Colorectal and Pancreatic Surgery

BACKGROUND

A number of studies have revealed higher postoperative mortality after operations that were performed toward the end of the week. It is not yet known whether a day-of-the-week effect exists after visceral surgical procedures for cancer in Germany.

METHODS

Data on resections of carcinomas of the colon, rectum (2010-2017), and head of the pancreas (2014-2017) (n = 19 703) that had been prospectively acquired by the Study, Documentation, and Quality Center of the German Society for General and Visceral Surgery were analyzed in relation to the day of the week on which the operation was performed. The primary endpoint was postoperative 30-day mortality; the secondary endpoints were complications, length of hospital stay, and MTL30 (a combined outcome criterion that is positive if the patient has died, is still in the hospital, or has been transferred to another acute care hospital 30 days after the index procedure).

RESULTS

Resections of colon carcinomas that were performed on Mondays were associated with more advanced tumor stages (T4: 18.4% vs. 15.7%, p <0.001), higher 30-day mortality (3.5% vs. 2.3%, p = 0.004), and a more frequently positive MTL30 (10.5% vs. 8.5%, p = 0.004). Among patients who underwent pancreatic head resections, those whose procedures were on Tuesday had higher mortality (6.2% vs. 3.8%; p = 0.021). Among those who underwent surgery for rectal carcinoma, the day of the week on which the procedure was performed had no effect on postoperative morality. Multivariate analysis revealed that the independent risk factors for postoperative mortality were colonic resection on a Monday (odds ratio [OR]: 1.45; 95% confidence interval [1.11; 1.92], p = 0.008) and pancreatic head resection on a Tuesday (OR: 1.88 [1.18; 2.91], p = 0.006).

CONCLUSION

Elective surgery for carcinoma of the colon or pancreatic head is associated with slightly higher mortality if per - formed toward the beginning of the week. On the other hand, the day of the week has no effect on the outcome of surgery for rectal carcinoma.

Preventable Morbidity and Mortality Among Non-trauma Emergency Surgery Patients: The Role of Personal Performance and System Flaws in Adverse Events

BACKGROUND

Preventable morbidity and mortality among emergency surgery patients is not adequately analyzed. We aim to describe and classify preventable complications and deaths in this population.

METHODS

The medical records and quality control documents of patients with emergency, non-trauma, surgical disease admitted between September 1, 2006, and August 31, 2018, and recorded to have a preventable or potentially preventable morbidity and mortality were reviewed. The primary outcome was a classification of the complications and deaths by a panel of experts, as attributable to issues of personal performance or system deficiencies.

RESULTS

One hundred and fifty patients were identified (127 complications and 23 deaths). The most commonly encountered preventable complications were surgical-site infection (17%), bleeding (13%), injury to adjacent structures (12%), and anastomotic leak (8%). The majority of complications seemed to stem from personal performance (97%), due to either technical or judgment issues, and only 3% were linked with system flaws, either in the form of communication or inadequate protocols. Alcohol use disorder and duration of operation were different between patients with preventable adverse events related to technical issues and patients related to judgment issues; furthermore, more patients who experienced judgment issues died during hospital stay (p <0.05).

CONCLUSION

Among emergency surgery patients, who suffer preventable complications and deaths, issues related to personal performance are more frequent than system flaws. Whereas the effort to improve systems should be unwavering, the emphasis on the surgeon's personal responsibility to avoid preventable complications should not be derailed.

Stapled intestinal anastomoses are more cost effective than hand-sewn anastomoses in a diagnosis related group system

PURPOSE

Creation of an optimal bowel anastomosis with low postoperative leakage rate is an immanent part of colorectal surgery contributing to recovery, length of hospital stay and overall hospital costs. We aimed to investigate costs of small and large bowel resection, length of hospital stay, anastomotic leakage rate and its risk factors depending on the anastomotic technique.

METHODS

Retrospective analysis of 198 patients (67 stapled and 131 hand-sewn anastomoses) undergoing elective bowel resection with a single anastomosis without protective ileostomy either stapled or in double-rowed running suture technique between 1st October 2012 and 30th September 2018 at Charité University Hospital Berlin, Campus Benjamin Franklin. We analyzed costs of treatment, total length of hospital stay, rate of anastomotic leakage and possible risk factors for anastomotic leak.

RESULTS

No significant difference between both anastomotic techniques could be detected for hospital stay (p = 0.754), 30-day-readmission rate (p = 0.827), or anastomotic leakage (p = 606). Neither comorbidities (p = 0.449), underlying disease (p = 0.132), experience of the surgical team (p = 0.828) nor scheduling of the operation (p = 0.531) were associated with anastomotic leakage. Stapled anastomoses took 22 min less operation time than sutured anastomoses (130 vs. 152 min. Median) (p = 0.001). Operations with stapled anastomoses saved 183 € in operation costs and 496 € in overall hospital costs.

CONCLUSION

Stapled and hand-sewn bowel anastomoses can be performed equally safe without differences in postoperative outcome. No patient, procedure or surgeon related risk factors for anastomotic leakage could be detected. Bowel resections with stapled anastomoses take less time and save operation and overall hospital costs.

Use of right colon vaginoplasty in gender affirming surgery: proposed advantages, review of technique, and outcomes

INTRODUCTION

Various methods have been described to create a functional neovagina with feminizing (male-to-female) gender affirming surgery. Intestinal vaginoplasty using ileal or colon segments confers natural mucus production and greater canal depth with primary vaginoplasty. In this work we describe an alternative approach to primary and salvage vaginoplasty using right colon. We focus on relative advantages compared to use of other bowel segments, and we review patient outcomes.

METHODS

Transgender women who had previously undergone primary vaginoplasty underwent laparoscopic right colon vaginoplasty at our center between 12/2017 and 7/2019. Demographic, medical, outcome, and satisfaction data was collected and retrospectively reviewed.

RESULTS

Twenty-two consecutive transgender women patients underwent laparoscopic right colon vaginoplasty. Mean age was 39.3 years. There were two intraoperative complications:1 injury of the ileocolic pedicle, and 1 minor bladder injury. Four of 22 patients (18.2%) had short-term complications (< 30 days): 3 had postoperative ileus/small bowel obstruction and 1 had intra-abdominal hemorrhage. All were managed conservatively. Six of 22 patients (27.3%) experienced a total of 14 long-term complications (> 30 days): 1 developed Crohn's (not involving the neovagina); 1 developed late small bowel obstruction (SBO) (managed conservatively); 5 developed neovagina prolapse; 4 developed stenosis (2 at the vaginal introitus, and 2 had extrinsic obstruction at the recto-vaginal junction (all underwent successful laparoscopic surgical correction); and 3 were diagnosed with diversion neovaginitis (all treated conservatively). All complications were successfully treated with conservative and/or surgical intervention. All (100%) patients reported satisfaction with neovagina function and appearance.

CONCLUSION

This is the only outcomes series of transgender women patients who have undergone right colon vaginoplasty, to date. Our study finding suggests that laparoscopic right colon for primary or salvage vaginoplasty has several important advantages over use of Sigmoid colon or Ileum, and is a reliable technique whose complications can be managed successfully, with favorable, satisfactory long-term outcomes.

Is Same-Day and Next-Day Discharge After Laparoscopic Colectomy Reasonable in Select Patients?

BACKGROUND

Discharge on postoperative day 3 after laparoscopic colorectal resections is now common, and same-day discharge has been proposed recently as an option.

OBJECTIVE

The purpose of this study was to determine the safety of same-day and next-day discharge after laparoscopic colorectal surgery and to delineate which characteristics may make a patient eligible for this pathway.

DESIGN

This was a retrospective cohort study.

SETTINGS

The American College of Surgeons National Surgical Quality Improvement Project Targeted Colectomy Participant User File was used.

PATIENTS

Patients underwent elective laparoscopic colorectal resection and were discharged without complications on or before postoperative day 5 (early discharge: postoperative day 0 or 1, intermediate: postoperative day 2, standard: postoperative day 3 to 5).

MAIN OUTCOME MEASURES

Early readmission (on or before postoperative day 7), anastomotic leak, ileus, and overall readmission were measured.

RESULTS

Of 36,526 patients total, 906 (2.5%) were discharged on postoperative day 0 or 1. Patients discharged on postoperative day 0/1 tended to have shorter-duration operations, a diagnostic indication more commonly of benign neoplasm, and underwent less low pelvic anastomoses. The readmission rate within 7 days was only 2%. Overall rates of anastomotic leak (0.6% early, 1.0% intermediate, 1.2% standard), ileus (1.9% early, 1.5% intermediate, 2.1% standard), and readmission (early 4.8%, intermediate 5.1%, standard 5.8%) were equivalent to decreased in patients discharged early versus those discharged in the intermediate or standard discharge groups. On multivariable analysis, dismissal day remained a noncontributory-to-protective factor against anastomotic leak, ileus, and readmission.

LIMITATIONS

Specific follow-up pathways used were unknown, and selection bias exists in deciding what day patients can be discharged.

CONCLUSIONS

Discharge on the same day or next day after surgery was not associated with increased risk compared with discharge on postoperative day 3 to 5, and it did not result in a high rate of early readmissions. Increased use of expedited discharge pathways would reduce hospital costs and resource use. See Video Abstract at http://links.lww.com/DCR/B331. ¿ES RAZONABLE EL ALTA EL MISMO DíA O AL DíA SIGUIENTE, DESPUéS DE LA COLECTOMíA LAPAROSCóPICA EN PACIENTES SELECCIONADOS: Es común el alta hospitalaria en el 3er día postoperatorio, después de resecciones colorrectales laparoscópicas. Recientemente se ha propuesto como una opción, el alta el mismo día.Determinar la seguridad de alta el mismo día o al día siguiente después de la cirugía colorrectal laparoscópica, y delinear qué características pueden hacer que un paciente sea elegible para esta vía.Estudio de cohorte retrospectivo.American College of Surgeons National Surgical Quality Improvement Project Targeted Colectomy Participant User File.Se sometieron a resección colorrectal laparoscópica electiva, y se dieron de alta sin complicaciones durante el 5° día postoperatorio o antes (alta temprana: día 0 o 1 postoperatorio; intermedia: día 2 postoperatorio; estándar: día 3-5 postoperatorio).Reingreso temprano (en o antes del día 7 postoperatorio), fuga anastomótica, íleo y reingreso general.De 36,526 pacientes en total, 906 (2.5%) fueron dados de alta en el día 0 o 1 postoperatorio. Los pacientes dados de alta en el día 0/1 postoperatorio, tendieron a presentar operaciones de menor duración, indicación diagnóstica más frecuente de neoplasia benigna, y sometidos a menos anastomosis de pelvis baja. La tasa de readmisión dentro de los siete días, fue del 2%. Las tasas generales de fuga anastomótica (0.6% temprana, 1.0% intermedia, 1.2% estándar), íleo (1.9% temprana, 1.5% intermedia, 2.1% estándar) y reingreso (temprana 4.8%, intermedia 5.1%, estándar 5.8%) fueron equivalentes a la disminución en pacientes dados de alta temprana, versus aquellos dados de alta en los grupos intermedia o estándar. En el análisis multivariable, el día de alta no contribuyó al factor protector contra la fuga anastomótica, el íleo y el reingreso.Se desconocen las vías de seguimiento específicas utilizadas y existe un sesgo de selección al decidir en qué día se puede dar de alta a los pacientes.El alta el mismo día o al día siguiente después de la cirugía, no se asoció con un mayor riesgo, en comparación con el alta en el postoperatorio en los días 3-5, y no dio lugar a una alta tasa de reingresos tempranos. Mayor utilización de las vías de alta acelerada, reducirían costos hospitalarios y utilización de recursos. Consulte Video Resumen en http://links.lww.com/DCR/B331. (Traducción-Dr Fidel Ruiz Healy).

In vivo performance of a bilayer wrap to prevent abdominal adhesions

There is a high prevalence of intra-abdominal adhesions following bowel resection, which can result in chronic pain, bowel obstruction, and morbidity. Although commercial adhesion barriers have been widely utilized for colonic resections, these barriers do not prevent anastomotic leakage resulting from reduced healing of the anastomosis, which can result in long-term health problems. To address this limitation, we have developed an adhesive bilayer wrap with selective bioactivity to simultaneously prevent intra-abdominal adhesion formation and promote anastomotic healing. Reactive electrospinning was used to generate a crosslinked gelatin mesh to serve as a cell-instructive substrate to improve anastomotic healing. A coating of poly(ethylene glycol) (PEG) foam was applied to the bioactive mesh to generate an antifouling layer and prevent intra-abdominal adhesions. After in vitro confirmation of selective bioactivity, the composite wrap was compared after 2 weeks to a commercial product (Interceed^Ⓡ) in an in vivo rat colonic abrasion model for prevention of intra-abdominal adhesions. The composite bilayer wrap was able to prevent intra-abdominal adhesions when clinical placement was maintained. The composite bilayer wrap was further modified to include tissue adhesive properties for improved efficacy. Preliminary studies indicated that the adhesive composite bilayer wrap maintained a maximum shear strength comparable to Interceed^Ⓡ and greater than fibrin glue. Overall, this work resulted in an initial proof-of-concept device that was shown to effectively prevent intra-abdominal adhesion formation in vivo. The composite bilayer wrap studied here could lead to an improved technology for improved healing of intestinal anastomoses.

Intraoperative fluorescence angiography and risk factors of anastomotic leakage in mini-invasive low rectal resections

BACKGROUND

One of the prerequisites for proper healing of the anastomosis after a colorectal resection is adequate blood supply to the connected intestinal segments. It has been proposed that adequate visualization of the blood flow using indocyanine green (ICG) could lead to the reduction in the incidence of anastomotic leakage (AL). The aim of this study was to assess the effectiveness of intraoperative fluorescence angiography (FA) in decreasing the incidence of AL after minimally invasive low anterior resection (LAR) with total mesorectal excision (TME) in rectal cancer patients and to determine predictors of anastomotic leak.

METHODS

From August 2015 to January 2019, data from 100 patients who underwent mini-invasive TME for rectal cancer using FA with indocyanine green (ICG) were prospectively collected and analyzed. They were compared with retrospectively analyzed data from a historical control group operated by one team of surgeons before the introduction of FA from November 2012 to August 2015 (100 patients). All patients from both groups were operated sequentially in one oncological center in Nový Jičín.

RESULTS

The incidence of AL was significantly lower in the ICG group (19% vs. 9%, p = 0.042, χ² test). In fifteen patients in the ICG group (15%), the resection line was moved due to insufficient perfusion. Using Pearson's χ² test, diabetes (p = 0.036) and application of a transanal drain (NoCoil) (p = 0.032) were identified as other risk factors (RFs) for AL.

CONCLUSION

The use of ICG to visualize tissue perfusion in low rectal resections for cancer can lead to a reduction of AL.

[C-reactive protein as early predictor of anastomotic leakage after surgery for colorectal cancer. Systematic review and meta-analysis]

OBJECTIVE

Systematic review and meta-analysis of data on C-reactive protein (CRP) as a predictor of anastomotic leakage (AL) after surgery for colorectal cancer.

MATERIAL AND METHODS

Literature searching was performed in Medline, Elibrary, Scopus, Web of Science databases. Literature request consisted of keywords «CRP», «colorectal surgery», «anastomotic leakage» for the period 2008-2018. Meta-analysis included 2 manuscripts for the second postoperative day, 7 articles for the third postoperative day and 6 articles for the fourth postoperative day. ROC-analysis was made to determine optimal prognostic values.

RESULTS

ROC-curve for the second postoperative day - AUC 0.758; optimal CRP value - 154 mg/l (sensitivity 70.1%, specificity 55.6%), 95% confidence interval 0.698-0.819. ROC-curve for the third postoperative day - AUC 0.715; optimal CRP value - 144.5 mg/l (sensitivity 79.1% specificity 60.3%), 95% confidence interval 0.68-0.75. ROC-curve for the fourth postoperative day - AUC 0.767; optimal CRP value - 122.91 mg/l (sensitivity 72.3% specificity 60%), 95% confidence interval 0.73-0.804.

CONCLUSION

Increased CRP is an early predictor of AL after surgery for colorectal cancer. CRP level ≥144.5 mg/l on the third postoperative day can predict AL (sensitivity 79%, specificity 60%).

Colorectal anastomosis after laparoscopic extended left colectomy: techniques and outcome

AIM

After extended left colectomy, traditional colorectal anastomosis is often not feasible because of insufficient length of the remaining colon to perform a tension-free anastomosis. Total colectomy with ileorectal anastomosis could be an alternative but this can lead to unsatisfactory quality of life. Trans-mesenteric colorectal anastomosis or inverted right colonic transposition (the so-called Deloyers procedure) are two possible solutions for creating a tension-free colorectal anastomosis after extended left colectomy. Few studies have reported their results of these two techniques and mostly via laparotomy. The aim of this study was to describe the trans-mesenteric colorectal anastomosis and the inverted right colonic transposition procedure via a laparoscopic approach and report the outcome in a series of 13 consecutive patients.

METHOD

This was retrospective chart review of laparoscopic colorectal surgery with trans-mesenteric colorectal anastomosis or the inverted right colonic transposition procedure from January 2015 up to 2019. An accompanying video demonstrates these two techniques.

RESULTS

Thirteen consecutive patients underwent either a laparoscopic trans-mesenteric colorectal anastomosis (n = 9) or an inverted right colonic transposition procedure (n = 4). One patient had intra-operative presacral bleeding that was stopped successfully without conversion. Two patients had a postoperative intra-abdominal abscess, but no anastomotic complications were recorded. The median number of bowel movements per day after 6 months was 2 (range 2-5).

CONCLUSIONS

Trans-mesenteric colorectal anastomosis or the inverted right colonic transposition procedure is feasible laparoscopically. The now well-established classical advantages of the laparoscopic approach are associated with good functional outcome after these procedures.

Latest Advances in Intersphincteric Resection for Low Rectal Cancer

Background

Intersphincteric resection (ISR) has been a preferable alternative to abdominoperineal resection (APR) for anal preservation in patients with low rectal cancer. Laparoscopic ISR and robotic ISR have been widely used with the proposal of 2 cm or even 1 cm rule of distal free margin and the development of minimally invasive technology. The aim of this review was to describe the newest advancements of ISR.

Methods

A comprehensive literature review was performed to identify studies on ISR techniques, preoperative chemoradiotherapy (PCRT), complications, oncological outcomes, and functional outcomes and thereby to summarize relevant information and controversies involved in ISR.

Results

Although PCRT is employed to avoid positive circumferential resection margin (CRM) and decrease local recurrence, it tends to engender damage of anorectal function and patients' quality of life (QoL). Common complications after ISR include anastomotic leakage (AL), anastomotic stricture (AS), urinary retention, fistula, pelvic sepsis, and prolapse. CRM involvement is the most important predictor for local recurrence. Preoperative assessment and particularly rectal endosonography are essential for selecting suitable patients. Anal dysfunction is associated with age, PCRT, location and growth of anastomotic stoma, tumour stage, and resection of internal sphincter.

Conclusions

The ISR technique seems feasible for selected patients with low rectal cancer. However, the postoperative QoL as a result of functional disorder should be fully discussed with patients before surgery.

How to Prevent Anastomotic Leak in Colorectal Surgery? A Systematic Review

Anastomosis leakage (AL) after colorectal surgery is an embarrassing problem. It is associated with poor consequence. This review aims to summarize published evidence on prevention of AL after colorectal surgery and provide recommendations according to the Oxford Centre for Evidence-Based Medicine. We conducted bibliographic research on January 15, 2020, of PubMed, Cochrane Library, Embase, Scopus, and Google Scholar. We retained meta-analysis, reviews, and randomized clinical trials. We concluded that mechanical bowel preparation did not reduce AL. It seems that oral antibiotic or oral antibiotic with mechanical bowel preparation could reduce the risk of AL. The surgical approach did not affect the AL rate. The low ligation of the inferior mesenteric artery could reduce the AL rate. The mechanical anastomosis is superior to handsewn anastomosis only in case of right colectomies, with similar results in rectal surgery between the 2 anastomosis techniques. In the case of right colectomies, this anastomosis could be performed intracorporeally or extracorporeally with similar outcomes. The air leak test did not reduce AL. There is no interest of external drainage in colonic surgery but drains reduced the rate of AL and rate of reoperation after low anterior resection. The transanal tube reduced the rate of AL.

Influence of concurrent capecitabine based chemoradiotherapy with bevacizumab on the survival rate, late toxicity and health-related quality of life in locally advanced rectal cancer: a prospective phase II CRAB trial

Background

Few studies reported early results on efficacy, toxicity of combined modality treatment for locally advanced rectal cancer (LARC) by adding bevacizumab to preoperative chemoradiotherapy, but long-term data on survival, and late complications are lacking. Further, none of the studies reported on the assessment of quality of life (QOL).

Patients and methods

After more than 5 years of follow-up, we updated the results of our previous phase II trial in 61 patients with LARC treated with neoadjuvant capecitabine, radiotherapy and bevacizumab (CRAB study) before surgery and adjuvant chemotherapy. Secondary endpoints of updated analysis were local control (LC), disease free (DFS) and overall survival (OS), late toxicity and longitudinal health related QOL (before starting the treatment and one year after the treatment) with questionnaire EORTC QLQ-C30 and EORTC QLQ-CR38.

Results

Median follow-up was 67 months. During the follow-up period, 16 patients (26.7%) died. The 5-year OS, DFS and LC rate were 72.2%, 70% and 92.4%. Patients with pathological positive nodes or pathological T3–4 tumors had significantly worse survival than patients with pathological negative nodes or T0–2 tumors. Nine patients (14.8%) developed grade ³3 late complications of combined modality treatment, first event 12 months and last 87 months after operation (median time 48 months). Based on EORTC QLQ-C30 scores one year after treatment there were no significant changes in global QOL and three symptoms (pain, insomnia and diarrhea), but physical and social functioning significantly decreased. Based on QLQ-CR38 scores body image scores significantly increase, problems with weight loss significantly decrease, but sexual dysfunction in men and chemotherapy side effects significantly increase.

Conclusions

Patients with LARC and high risk factors, such as positive pathological lymph nodes and high pathological T stage, deserve more aggressive treatment in the light of improving long-term survival results. Patients after multimodality treatment should be given greater attention to the regulation of individual aspects of quality of life and the occurrence of late side effects.

The clinical and economical impact of postoperative ileus in patients undergoing colorectal surgery

BACKGROUND

Colorectal surgery is associated with postoperative ileus (POI). Despite its widespread manifestation, the influence of POI on recovery, quality of life (QoL), and costs is largely unknown. The aim of this study was to assess whether the inflammatory processes found in experimental studies are also evident in patients undergoing colorectal surgery. In addition, the impact of POI on short and long-term QoL and costs was investigated.

METHODS

We analyzed the outcomes of the SANICS-II trial, including prospective evaluation of inflammatory parameters in blood samples, costs from a societal perspective and QoL, using validated questionnaires. Outcomes were compared between patients with and without POI, and in particular patients with POI as unique complication.

KEY RESULTS

A total of 265 patients (POI, n = 66 vs non-POI, n = 199) were included and 38/66 had POI as only complication. CRP levels were significantly increased on postoperative day (POD) 1, 2, 3, and 4 in patients with POI. Furthermore, plasma levels of cytokines IL-6, Il-8 and IL-10 were significantly increased the first 2 days after resection. Patients with POI had a higher overall complication rate and a reduced QoL 3 months postoperatively, even in the only POI group. Moreover, mean societal cost per patient with POI was 38%-47% higher at 3 months postoperatively.

CONCLUSIONS & INFERENCES

Supporting findings from experimental studies, inflammatory parameters were increased in patients with only POI and comparable with all patients with POI. These results demonstrate the impact and large contribution of POI in postoperative inflammation, costs and QoL in patients undergoing colorectal surgery.

C-reactive protein trajectory to predict colorectal anastomotic leak: PREDICT Study

BACKGROUND

Anastomotic leak is a common complication after colorectal surgery, associated with increased morbidity and mortality, and poorer long-term survival after oncological resections. Early diagnosis improves short-term outcomes, and may translate into reduced cancer recurrence. Multiple studies have attempted to identify biomarkers to enable earlier diagnosis of anastomotic leak. One study demonstrated that the trajectory of C-reactive protein (CRP) levels was highly predictive of anastomotic leak requiring intervention, with an area under the curve of 0·961. The aim of the present study was to validate this finding externally.

METHODS

This was a prospective international multicentre observational study of adults undergoing elective colorectal resection with an anastomosis. CRP levels were measured before operation and for 5 days afterwards, or until day of discharge if earlier than this. The primary outcome was anastomotic leak requiring operative or radiological intervention.

RESULTS

Between March 2017 and July 2018, 933 patients were recruited from 20 hospitals across Australia, New Zealand, England and Scotland. Some 833 patients had complete CRP data and were included in the primary analysis, of whom 41 (4·9 per cent) developed an anastomotic leak. A change in CRP level exceeding 50 mg/l between any two postoperative days had a sensitivity of 0·85 for detecting a leak, and a high negative predictive value of 0·99 for ruling it out. A change in CRP concentration of more than 50 mg/l between either days 3 and 4 or days 4 and 5 after surgery had a high specificity of 0·96-0·97, with positive likelihood ratios of 4·99-6·44 for a leak requiring intervention.

CONCLUSION

This study confirmed the value of CRP trajectory in accurately ruling out an anastomotic leak after colorectal resection.

Safety and efficacy of laparoscopic near-total colectomy and ileo-distal sigmoid anastomosis as a modification of total colectomy and ileorectal anastomosis for prophylactic surgery in patients with adenomatous polyposis syndromes: a comparative study

AIM

Colectomy in patients with adenomatous polyposis (AP) syndromes demands good oncological and surgical outcome. Total colectomy with ileorectal anastomosis (TC-IRA) is one surgical option for these patients. Anastomotic leakage rates of 11% have been reported following TC-IRA. Ileo-distal sigmoid anastomosis (IDSA) is a recent modification of our practice. Our aim was to compare postoperative outcome in patients with AP following near-total colectomy with IDSA (NT-IDSA) and TC-IRA at a single institution.

METHOD

A prospectively maintained database was reviewed to identify patients with AP who underwent laparoscopic NT-IDSA and TC-IRA. Patient demographics, early morbidity and mortality and outcome of endoscopic surveillance were evaluated.

RESULTS

A total of 191 patients with AP underwent laparoscopic colectomy between 2006 and 2017, of whom 139 (72.8%) underwent TC-IRA and 52 (27.2%) NT-IDSA. The median age at surgery in the TC-IRA and NT-IDSA groups was 20 years (IQR 17-45) and 27 years (IQR 19-50), respectively. Grade II complications were comparable between the two groups. There were no anastomotic leakages in the NT-IDSA group compared with 15 (10.8%) in the TC-IRA group (P = 0.0125) and no reoperation in the NT-IDSA group compared with 17 (12.2%) in the TC-IRA group (P = 0.008). The frequency of polypectomies per flexible sigmoidoscopy was comparable between the two groups.

CONCLUSION

This study demonstrates that laparoscopic NT-IDSA for polyposis is associated with a significant improvement in anastomotic leakage rates and surgical outcome. It is too soon to tell whether NT-IDSA alters the need for further intervention, either endoscopic polypectomy or further surgery.

Clinical efficacy of bowel perfusion assessment during laparoscopic colorectal resection using laser speckle contrast imaging: A matched case-control study

INTRODUCTION

Disadvantages of bowel perfusion assessment with indocyanine green fluorescence angiography include the need for a fluorophore and the subjective nature of the assessment. This study was performed to evaluate the clinical efficacy of bowel perfusion assessment using laser speckle contrast imaging (LSCI) during laparoscopic colorectal surgery.

METHODS

The study population comprised the first 27 consecutive patients who underwent laparoscopic left-sided colorectal resection with intraoperative perfusion assessment using LSCI. The operative outcomes of these patients were compared with those of a matched group of patients without perfusion assessment. We analyzed the flux data expressed in laser speckle perfusion units.

RESULTS

After propensity score matching, we found no significant between-group differences in the patients' characteristics with the exception of the cancer stage. No patients undergoing LSCI perfusion assessment developed anastomotic leakage, but five (18.5%) patients in the control group did, at a significantly higher rate in male patients (P = .042). There were no significant differences in other operative outcomes. The laser speckle perfusion unit values after ligating marginal vessels were significantly lower than before ligation (P < .01).

CONCLUSIONS

With respect to anastomotic leakage, LSCI may improve patient outcomes after colorectal surgery. This technique appears to be a superior tool with the advantages of measurement repeatability and quantitativity and no need for a fluorophore.

Radiographic Findings of Anastomotic Leaks

Although computed tomography (CT) scans play an important role in the diagnosis and management of anastomotic leaks (AL), there is no consensus on what radiographic findings are associated with AL. The purpose of this study is to identify the most common CT scan findings associated with AL and whether the amount of extraluminal air or the density of extraluminal fluid can be correlated with the presence of an AL. A retrospective chart review of 210 patients with anastomotic leaks from 2003 to 2010 at Mount Sinai Medical Center was performed. Eighty-six patients fit our criteria and were included. All CT scans were reread by an independent radiologist not involved with patient care. Our study included 59 per cent men and 41 per cent women with a mean age of 51 years. Diagnoses included inflammatory bowel disease (53%), malignancy (21%), and diverticulitis (12%). One hundred per cent of the patients had one of three findings: extraluminal air (92%), extraluminal fluid (88%), or extravasation of contrast (32%). Eighty-one per cent (70/86) had both fluid and air simultaneously. Extraluminal air was seen in 79 patients. The estimated amounts of extraluminal air were as follows: 0 to 25 mL (49%), 26 to 500 mL (41%), 500 to 1000 mL (5%), and more than 1000 mL (5%). The Hounsfield unit (HU) measurements of the fluid ranged from 3 to 633 HUs. The most common CT findings associated with AL are pneumoperitoneum and extraluminal fluid, including extravasation of contrast, which can be seen in up to 100 per cent of patients. The amount of estimated extraluminal air and density of fluid collection have no prognostic value in predicting AL.

Malnutrition-Related Factors Increased the Risk of Anastomotic Leak for Rectal Cancer Patients Undergoing Surgery

Objective

To study the possible risk factors and related prediction indexes of anastomotic leakage (AL) in patients with rectal cancer during the perioperative period and to provide effective indexes for predicting whether AL will occur in postoperative patients with rectal cancer and whether early nutritional support is needed.

Background

AL after rectal cancer surgery is a common and serious complication. Many of the risk factors for AL have been confirmed. Nevertheless, the evidence of the effect of perioperative malnutrition on AL is still insufficient. This article will make a further study on this point.

Methods

We collected perioperative clinical data from 382 patients with rectal cancer who underwent surgery from September 2015 to May 2017. After 1 month of follow-up, relevant risk factor data were collected and analyzed.

Results

Data analysis showed that the incidence of AL was 14.65%. In single factor analysis, patients with high score of NRS-2002, high score of PG-SGA, diabetes, perioperative blood transfusion, postoperative diarrhea, later tumor stage, high score of ASA, low postoperative albumin, and rectal cancer patients with tumor close to the anus may led to AL. Multivariate analysis revealed that low postoperative albumin (p = 0.044), tumor close to the anus (p = 0.004), diabetes (p = 0.003), perioperative blood transfusion (p < 0.001), diarrhea (p = 0.005), later tumor stage, and high score of PG-SGA (p < 0.001) were the independent risk factors for postoperative AL.

Conclusions

AL in rectal cancer operation is a common postoperative complication. Patients with diabetes or high PG-SGA score or low perioperative albumin will have increased risk factors of AL, which should be paid enough attention in the perioperative period and nutritional support should be provided as soon as possible. Patients who have incomplete intestinal obstruction but can make effective intestinal preparation or who receive neoadjuvant chemotherapy have no increased risk of AL.

The trend of C-Reactive protein allows a safe early discharge after surgery for Crohn's disease

Postoperative C-reactive protein (CRP) level allows to rule out infectious complications ensuring safe hospital discharge in colorectal cancer surgery. Since its clinical significance in Crohn's disease (CD) has not been studied yet, we investigated whether CRP can guide decision-making on hospital discharge in this population. Only consecutive CD patients undergoing resections with primary anastomosis and without covering stoma (2013-2017) were analysed. Pre- and post-operative CRP values, measured daily until discharge, were correlated with postoperative complications including anastomotic leakage (AL), infectious and non-infectious complications. The diagnostic accuracy of CRP in predicting AL was evaluated according to the area under the curve (AUC), using the receiver-operating characteristic (ROC) methodology. Two-hundred and fifty-one consecutive patients undergoing elective surgery for CD were selected. AL was diagnosed in 10 patients (4%). High CRP level was associated with AL on postoperative day (POD) 3-5 (p = 0.002, AUC 0.825) with a positive predictive value of 60%. CRP linear difference of 140 between POD 1 and 3 (AUC 0.800) maximizes sensitivity and specificity with a NPV of 98.6%. CRP trend, measured with the linear difference between POD 1 and 3, is able to rule out anastomotic complications with a high NPV and may allow a safe early hospital discharge after surgery for CD.

Risk factors for adverse events after elective colorectal surgery: beware of blood transfusions

Purpose of the present study is to analyze risk factors for adverse events after elective colorectal resection. A wide range of adverse events after elective colorectal surgery was reported, anastomotic leakage (AL) and related morbidity and mortality being the most feared ones. Clear definition of risk factors is crucial to limit the related mortality. Prospective, 1-year multicenter enrollment of 1546 elective colorectal resections with anastomosis. Endpoints were anastomotic leakage (AL), overall morbidity, major morbidity and mortality rates (ClinicalTrials.gov; Identifier: NCT03560180). AL rate was 4.92%. Overall morbidity, major morbidity and mortality rates were 30.20%, 9.76% and 1.29%, respectively. Intra- and/or postoperative blood transfusion(s) was the only variable independently influencing all the endpoints: Odds ratios (OR) were 8.15 for AL, 19.33 for overall morbidity, 10.17 for major morbidity and 3.70 for mortality); overall morbidity rates were also independently influenced by American Society of Anesthesiologists class III vs I-II and extra- vs intra-corporeal anastomosis (OR 1.57 and 1.49, respectively); major morbidity rates were also independently influenced by female vs male gender and by the length of the procedure (OR 0.60 and 1.004, respectively); mortality rates were also independently influenced by increasing age (OR 1.16). This study clearly identifies intra- and/or postoperative blood transfusion(s) as an independent risk factor for all adverse events after elective colorectal surgery.

Relationship between anastomotic leakage and CT value of the mesorectum in laparoscopic anterior resection for rectal cancer

OBJECTIVE

This study aims to indicate whether the CT value of the mesorectum could be correlated with the incidence of anastomotic leakage (AL) in laparoscopic surgery for rectal cancer.

METHODS

The study subjects included 173 patients who underwent laparoscopic anterior resection (LAR) for rectal cancer from September 2005 to 2016 in our institution as well as reliable contrast-enhanced CT preoperatively. Univariate and multivariate analyses were performed to determine the correlation between surgical outcomes, including AL and CT value of the mesorectum.

RESULTS

AL was observed in 30 (17.3%) patients. Amongst short-term surgical outcomes, overall complication showed significant correlation with the CT value of the mesorectum (P = 0.003). In addition, AL was the only factor, which significantly correlated with the CT value of the mesorectum (P = 0.017). By plotting receiver operating characteristic curve, -75 HU was the threshold of the CT value of the mesorectum for predicting AL with an area under the curve of 0.772. Categorized into two groups as per the threshold, low group showed significantly higher incidence of AL (OR, 2.738; 95% CI, 1.105-6.788; P = 0.030) as well as whole complications (OR, 4.431; 95%CI, 1.912-10.266; P = 0.001).

CONCLUSION

The CT value of the mesorectum may be a helpful preoperative radiological biomarker to predict AL after LAR for rectal cancer.

The influence of anastomotic leakage for rectal cancer oncologic outcome: A systematic review and meta-analysis

BACKGROUND AND OBJECTIVE

Anastomotic leakage is a serious complication after arterial resection of rectal cancer. It has been found that anastomotic leakage is related to the oncological outcome. The purpose of the study is to evaluate the long-term outcome of the rectal tumor after anastomotic leakage.

METHODS

The effect of anastomotic leakage on the oncological outcome of rectal cancer was studied by electronic literature retrieval. Using the DerSimonian Laird random effect model to calculate the odds ratio and 95% confidence interval. Research heterogeneity was evaluated by Q statistics and I² , and bias was evaluated by funnel plot and Begg's test.

RESULTS

A total of 35 studies and 44 698 patients were included in the study. The studies have shown that anastomotic leakage is associated with local recurrence (OR = 1.93; 95% CI, 1.57-2.38; P < .0001), overall survival (OR = 1.64; 95% CI, 1.37-1.95; P < .00001), disease-free survival (OR = 2.07; 95% CI, 1.50-2.87; P < .00001) and cancer-specific survival (OR = 1.32; 95% CI, 1.02-1.70; P = .012), while it was not related to distant recurrence (OR = 1.25; 95% CI, 0.95-1.65; P = .12).

CONCLUSIONS

The results showed that anastomotic leakage after anterior resection increased the risk of local recurrence, decreased the overall survival, cancer-specific survival and disease-free survival.

Comparison of safety of loop ileostomy and loop transverse colostomy for low-lying rectal cancer patients undergoing anterior resection: A retrospective, single institution, propensity score-matched study

INTRODUCTION

This study was to compare the prevalence of stoma-related complications and stoma reversal perioperative complications of patients with low-lying rectal cancer who received preventative loop ileostomy and those who underwent loop transverse colostomy.

METHODS

This retrospective single-center study analyzed the clinicopathologic and surgical data of 288 patients with pathologically proven primary rectal cancer who underwent anterior resection with either preventative loop ileostomy (n = 82) or loop transverse colostomy. To achieve comparability of a propensity score matching method was used to match patients from each group in a 1:2 ratio. Determinants of stoma-related complications were analyzed by multivariate logistic regression analysis.

RESULTS

Forty-nine (74.3%) patients in the loop ileostomy group experienced stoma-related complications versus 48.7% in the loop transverse colostomy group (P < 0.01). Irritant dermatitis was the most frequent complication in both groups. The loop ileostomy group had a significantly higher rate (24.24%) of stoma reversal perioperative complications than the loop transverse colostomy group. Multivariate logistic regression analysis showed that ileostomy versus loop transverse colostomy was a significant independent risk for stoma-related complications and stoma reversal perioperative complications. Furthermore, by Clavien-Dindo classification, patients receiving loop ileostomy had an overall higher rate of complications and stoma reversal perioperative complications versus those undergoing loop transverse colostomy (P < 0.01). The rate of grade II complications was significantly higher in the loop ileostomy group (43.9%) than that of loop transverse colostomy group (13.5%, P < 0.01), whereas the rate of grade I, and grade IIIa and IIIb complications and stoma reversal perioperative complications was comparable between the two groups.

CONCLUSION

The study has demonstrated that loop transverse colostomy is associated with significantly lower rates of stoma-related complications and stoma reversal perioperative complications compared to loop transverse colostomy.

PulseCam: a camera-based, motion-robust and highly sensitive blood perfusion imaging modality

Blood carries oxygen and nutrients to the trillions of cells in our body to sustain vital life processes. Lack of blood perfusion can cause irreversible cell damage. Therefore, blood perfusion measurement has widespread clinical applications. In this paper, we develop PulseCam - a new camera-based, motion-robust, and highly sensitive blood perfusion imaging modality with 1 mm spatial resolution and 1 frame-per-second temporal resolution. Existing camera-only blood perfusion imaging modality suffers from two core challenges: (i) motion artifact, and (ii) small signal recovery in the presence of large surface reflection and measurement noise. PulseCam addresses these challenges by robustly combining the video recording from the camera with a pulse waveform measured using a conventional pulse oximeter to obtain reliable blood perfusion maps in the presence of motion artifacts and outliers in the video recordings. For video stabilization, we adopt a novel brightness-invariant optical flow algorithm that helps us reduce error in blood perfusion estimate below 10% in different motion scenarios compared to 20-30% error when using current approaches. PulseCam can detect subtle changes in blood perfusion below the skin with at least two times better sensitivity, three times better response time, and is significantly cheaper compared to infrared thermography. PulseCam can also detect venous or partial blood flow occlusion that is difficult to identify using existing modalities such as the perfusion index measured using a pulse oximeter. With the help of a pilot clinical study, we also demonstrate that PulseCam is robust and reliable in an operationally challenging surgery room setting. We anticipate that PulseCam will be used both at the bedside as well as a point-of-care blood perfusion imaging device to visualize and analyze blood perfusion in an easy-to-use and cost-effective manner.

Anastomotic leakage after elective colorectal surgery: a prospective multicentre observational study on use of the Dutch leakage score, serum procalcitonin and serum C-reactive protein for diagnosis

Background

The purpose of this study was to test use of the Dutch leakage score (DLS), serum C‐reactive protein (CRP) and serum procalcitonin (PCT) in the diagnosis of anastomotic leakage (AL) after elective colorectal resection in a prospective observational study.

Methods

Patients undergoing elective colorectal resection with anastomosis in 19 centres were enrolled over a 1‐year period from September 2017. The DLS and CRP and PCT levels were evaluated on postoperative day (POD) 2, POD3 and POD6. Statistical analysis, including determination of the area under the receiver operating characteristic (ROC) curve (AUC), was performed for the primary endpoint of AL; secondary endpoints were morbidity and mortality rates ( http://clinicaltrials.gov identifier: NCT03560180).

Results

Among 1546 patients enrolled, the AL rate was 4·9 per cent. Morbidity and mortality rates were 30·2 and 1·3 per cent respectively. With respect to AL, DLS performed better than CRP and PTC levels on POD2 and POD3 (AUC 0·75 and 0·84), whereas CRP levels were documented with better AUC values on POD6 (AUC 0·81). Morbidity was poorly predicted, whereas mortality was best predicted by PCT on POD2 (AUC 0·83) and by DLS on POD3 and POD6 (AUC 0·87 and 0·98 respectively). Overall, the combination of positive PCT, CRP and DLS values resulted in a probability of AL of 21·3 per cent on POD2, 33·4 per cent on POD3, and 47·1 per cent on POD6. However, the combination of their negative values excluded AL in 99·0 per cent of cases on POD2, 99·3 per cent on POD3, and 99·2 per cent on POD6.

Conclusion

DLS and CRP level are good positive and excellent negative predictors of AL; the addition of PCT improved the predictive value for diagnosis of AL.

Endoluminal negative pressure therapy in colorectal anastomotic leaks

AIM

The aim of the present work was to perform an up-to-date review of the literature on endoluminal negative pressure therapy for colorectal anastomotic leak.

METHOD

An electronic search in PubMed and Google Scholar and a manual search without language restrictions were performed on 25 January 2019. Only original series reporting endoluminal negative pressure therapy in colorectal anastomotic leaks were included. The primary outcome was the success rate (complete closure of the abscess cavity). The secondary outcomes were the rates of complications and stoma closure.

RESULTS

Nineteen series with a total of 295 cases were analysed. The median distance of the anastomosis from the anal verge and the size of the abscess were 5.65 cm (4.9-10) and 6.0 cm (5-8.1) respectively. In 84.5% (78%-91%) the stoma was created at the first intervention. Neoadjuvant therapy was performed in 48.6% (3%-60%). Median 7 sponges (2-34) were used with median negative pressure 150 mmHg (125-700) for a median of 31 days (14-127). The success rate was 85.4% (80%-91%) with ileostomy closure in 72.6%. Complications were observed in 19% (13%-25%): abscesses 11.5% and anastomotic stenosis 4.4%. Laparotomy was required in 15% of the complications. The stoma was the only significant predictor for the success of the therapy (0.007, SE 0.004, P = 0.040).

CONCLUSIONS

The initial experience looks promising with an 85% success rate, which precludes risky re-resections with redo anastomosis or Hartmann's procedure. Despite the good initial results, definitive conclusions cannot be drawn because of the small sample size and the lack of high-quality comparative studies.

Is platelet-rich plasma improves the anastomotic healing in hyperthermic intraperitoneal chemotherapy with oxaliplatin: an experimental rat study

Purpose

Hyperthermic intraperitoneal chemotherapy (HIPEC) is a novel treatment option for peritoneal surface malignancies. Due to cytotoxic effects of chemotherapeutic agents, anastomosis healing can be impaired and lead to leakage rates higher than conventional intestinal surgery. In this experimental study, we aimed to investigate the effects of platelet-rich plasma (PRP) on colonic anastomosis in rats that received HIPEC with oxaliplatin.

Methods

Thirty rats were divided into 3 groups. Group 1 was determined as control group and hyperthermic saline perfusion was performed after colon anastomosis. In group 2, colon anastomosis then hyperthermic oxaliplatin perfusion was performed. In the last group, the colonic anastomosis was enhanced by PRP gel and then hyperthermic oxaliplatin perfusion was performed. All the rats were reoperated on postoperative day 7 and anastomotic bursting pressure values were recorded. Tissue samples were taken for hydroxyproline assay and histopathological examination.

Results

Control group had higher anastomotic bursting pressure value than group 2 and group 3 (P < 0.001). There were significant differences in anastomotic bursting pressure between groups 2 and 3 (P < 0.001). Group 2 had significantly lower hydroxyproline levels than group 3 and control group (P < 0.001). Histopathological examination revealed that PRP application reduced inflammatory response.

Conclusion

PRP application on colonic anastomosis improves anastomotic healing and can reduce anastomosis related complications and stoma creation; though further clinical studies are needed.