Preoperative Mechanical Bowel Preparation Research Articles

Pre-operative mechanical bowel preparation and prophylactic oral antibiotics for pediatric patients undergoing elective colorectal surgery: a protocol for a randomized controlled feasibility trial

BackgroundInfections after elective colorectal surgery remain a significant burden for patients and the healthcare system. Adult studies suggest that the combination of oral antibiotics and mechanical bowel preparation is effective at reducing infections after colorectal surgery. In children, there is limited evidence for either of these practices and the utility of combining oral antibiotics with mechanical bowel preparation remains uncertain.MethodsThis study aims to determine the feasibility of conducting a randomized controlled trial assessing the efficacy of oral antibiotics, with or without mechanical bowel preparation, in reducing the rates of post-operative infection in pediatric colorectal surgery. Participants aged 3 months to 18 years undergoing elective colorectal surgery will be randomized pre-operatively to one of three trial arms: (1) oral antibiotics; (2) oral antibiotics and mechanical bowel preparation; or (3) standard care. Twelve patients will be included in each trial arm. Feasibility outcomes of interest include the rate of participant recruitment, post-randomization exclusions, protocol deviations, adverse events, and missed follow-up appointments. Secondary outcomes include the rate of post-operative surgical site infections, length of hospital stay, time to full enteral feeds, reoperation, readmission, and complications.DiscussionIf the results of this trial prove feasible, a multi-center trial will be completed with sufficient power to evaluate the optimal pre-operative bowel preperation for pediatric patients undergoing elective colorectal surgery.Trial registrationClinicalTrials.gov: NCT03593252.

Evaluating the Role of Mechanical Bowel Preparation in Anterior Resection Through a Prospective Randomized Single-Blinded Trial.

Introduction Mechanical bowel preparation (MBP) before colorectal surgery is a common practice to reduce bacterial levels and infection. However, recent studies and data analyses have shown that this practice may increase the incidence of postoperative septic complications. Limited information is available regarding MBP for rectal surgeries. Our study aimed to examine the impact of MBP on postoperative outcomes in patients undergoing anterior resection with primary anastomosis for rectal cancer in a single-blinded, single-center, prospective, randomized trial. Materials and methods Data were collected between September 2013 and December 2015 at the Amrita Institute of Medical Sciences, Kochi, India. All patients scheduled for elective anterior resection with primary anastomosis for cancer between 5 cm and 15 cm were included in the study. All patients were randomized into the MBP and non-MBP groups after obtaining consent using a computer-based randomizer. The MBP group underwent bowel preparation with polyethylene glycol 24 hours before the operation and received sodium phosphate rectal enemas the night before the procedure. In the non-MBP group, only dietary restriction with a low-residue diet for 48 hours was recommended. Laparoscopic and open surgeries were performed. A contrast enema with barium was performed on all patients on postoperative days 6-8 to detect an anastomotic leak. Our primary endpoint was to assess the rate of anastomotic leakage between the two groups. The secondary endpoints were surgical site infection and postoperative morbidity. Results A total of 78 patients were recruited in the trial, and 18 were excluded because the surgery was the Hartmann procedure or abdominal perineal resection. The remaining 60 patients were divided equally into the MBP and non-MBP groups. No clinically significant disparities were evident between the groups concerning the preoperative prognosticators of anastomotic leak. Among the cohort, anastomotic leakage occurred in eight patients, representing a 13.3% incidence. Remarkably, within this subset, seven patients (23.3%) were attributed to the non-MBP cohort, whereas only one patient (3.3%) belonged to the MBP group. These findings demonstrated a statistically noteworthy discrepancy. The two groups had no statistically significant difference in surgical site infection and postoperative morbidity. Conclusion Our study suggests the benefit of preoperative MBP in sphincter-preserving rectal surgery to reduce the anastomotic leak rate. Additionally, incorporating large-scale studies and meta-analyses could enhance the robustness of our conclusions.

Risk Factors Asscociated with Hypokalemia during Postanesthesia Recovery and Its Impact on Outcomes in Gynecological Patients: A Propensity Score Matching Study.

This study aimed to explore the risk factors and outcomes of hypokalemia during the recovery period from anesthesia in the gynecological population. This retrospective cohort study included 208 patients who underwent gynecological surgery at our institution between January 2021 and March 2022. Data were collected for each patient, including demographics, disease status, surgical data, and clinical information. Preoperative bowel preparation, postoperative gastrointestinal function, and electrolyte levels were compared between the two groups using propensity score matching (PSM). The incidence of hypokalemia (serum potassium level <3.5 mmol/L) during the recovery period from anesthesia was approximately 43.75%. After PSM, oral laxative use (96.4% vs. 82.4%, P=0.005), the number of general enemas (P=0.014), and the rate of ≥2 general enemas (92.9% vs. 77.8%, P=0.004) were identified as risk factors for hypokalemia, which was accompanied by decreased PaCO2 and hypocalcemia. There were no significant differences in postoperative gastrointestinal outcomes, such as the time to first flatus or feces, the I-FEED score (a scoring system was created to evaluate impaired postoperative gastrointestinal function), or postoperative recovery outcomes, between the hypokalemia group and the normal serum potassium group. Hypokalemia during postanesthesia recovery period occurred in 43.75% of gynecological patients, which resulted from preoperative mechanical bowel preparation; however, it did not directly affect clinical outcomes, including postoperative gastrointestinal function, postoperative complications, and length of hospital stay.

The effect of preoperative mechanical bowel preparation in paediatric bowel surgery on postoperative wound related complications: A meta-analysis.

Mechanical bowel preparation (MBP), a routine nursing procedure before paediatric bowel surgery, is widely should in clinical practice, but its necessity remains controversial. In a systematic review and meta-analysis, we evaluated the effect of preoperative MBP in paediatric bowel surgery on postoperative wound-related complications in order to analyse the clinical application value of MBP in paediatric bowel surgery. As of November 2023, we searched four online databases: the Cochrane Library, Embase, PubMed, and Web of Science. Two investigators screened the collected studies against inclusion and exclusion criteria, and ROBINS-I was used to evaluate the quality of studies. Using RevMan5.3, a meta-analysis of the collected data was performed, and a fixed-effect model or a random-effect model was used to analyse OR, 95% CI, SMD, and MD. A total of 11 studies with 2556 patients were included. Most of studies had moderate-to-severe quality bias. The results of meta-analysis showed no statistically significant difference in the incidence of complications related to postoperative infections in children with MBP before bowel surgery versus those with No MBP, wound infection (OR 1.11, 95% CI:0.76 ~ 1.61, p = 0.59, I2 = 5%), intra-abdominal infection (OR 1.26, 95% CI:0.58 ~ 2.77, p = 0.56, I2 = 9%). There was no significant difference in the risk of postoperative bowel anastomotic leak (OR 1.07, 95% CI:0.68 ~ 1.68, p = 0.78, I2 = 12%), and anastomotic dehiscence (OR 1.67, 95% CI:0.13 ~ 22.20, p = 0.70, I2 = 73%). Patients' intestinal obstruction did not show an advantage of undergoing MBP preoperatively, with an incidence of intestinal obstruction (OR 1.95, 95% CI:0.55 ~ 6.93, p = 0.30, I2 = 0%). Based on existing evidence that preoperative MBP in paediatric bowel surgery did not reduce the risk of postoperative wound complications, we cautiously assume that MBP before surgery is unnecessary for children undergoing elective bowel surgery. However, due to the limited number of study participants selected for this study and the overall low quality of evidence, the results need to be interpreted with caution. It is suggested that more high quality, large-sample, multicenter clinical trials are required to validate our findings.

Implementation and achievements of enhanced recovery after surgery program in perioperative management of gastric cancer patients†

Abstract Objective The enhanced recovery after surgery (ERAS) program is less implemented in gastric cancer patients. The purpose of this survey is to investigate the implementation status of ERAS in perioperative period in gastric cancer. Methods This clinical observational study enrolled 329 patients between January 2020 and August 2020 in a single gastric cancer center. The questionnaire consisted of 4 parts: basic information, preoperative status, intraoperative status, and postoperative status of ERAS implementation in gastric cancer surgery. Results In the preoperative period, patients’ education and counseling (100%) were well adopted. Smoking cessation (34.6%), drinking cessation (36.9%), avoidance of preoperative mechanical bowel preparation (24.3%), respiratory function training (11.2%), and administration of carbohydrate-rich drink before surgery (0.6%) were relatively not well adopted. During the operation, maintenance of intraoperative normothermia and fluid management (100%), as well as epidural analgesia (81.5%), were well adopted. Thromboprophylaxis was performed in 133 (40.4%) patients. In the postoperative period, early active mobilization was implemented about 9.5 h, and early ambulation was implemented about 39.5 h, after surgery. A total of 140 (42.5%) patients received prolonged prophylactic antibiotics; 268 (81.5%) patients were provided diet upon gas passage; and 320 (97.3%) patients received intravenous fluid administration more than 5 d after surgery. The practice rate of early removal of urinary catheter (0%) and nasogastric tube (15.5%) was relatively low. A total of 11 (3.3%) patients experienced postoperative complication, and 1 (0.3%) patient received unplanned reoperation. The average costs were ¥59,500, and the average hospital stay was 12 (5, 36) d. Conclusions Standard perioperative management of ERAS program in gastric cancer surgery in China still requires improvement.

International Variations in Surgical Morbidity and Mortality Post Gynaecological Oncology Surgery: A Global Gynaecological Oncology Surgical Outcomes Collaborative Led Study (GO SOAR1).

Gynaecological malignancies affect women in low and middle income countries (LMICs) at disproportionately higher rates compared with high income countries (HICs) with little known about variations in access, quality, and outcomes in global cancer care. Our study aims to evaluate international variation in post-operative morbidity and mortality following gynaecological oncology surgery between HIC and LMIC settings. Study design consisted of a multicentre, international prospective cohort study of women undergoing surgery for gynaecological malignancies (NCT04579861). Multilevel logistic regression determined relationships within three-level nested-models of patients within hospitals/countries. We enrolled 1820 patients from 73 hospitals in 27 countries. Minor morbidity (Clavien-Dindo I-II) was 26.5% (178/672) and 26.5% (267/1009), whilst major morbidity (Clavien-Dindo III-V) was 8.2% (55/672) and 7% (71/1009) for LMICs/HICs, respectively. Higher minor morbidity was associated with pre-operative mechanical bowel preparation (OR = 1.474, 95%CI = 1.054-2.061, p = 0.023), longer surgeries (OR = 1.253, 95%CI = 1.066-1.472, p = 0.006), greater blood loss (OR = 1.274, 95%CI = 1.081-1.502, p = 0.004). Higher major morbidity was associated with longer surgeries (OR = 1.37, 95%CI = 1.128-1.664, p = 0.002), greater blood loss (OR = 1.398, 95%CI = 1.175-1.664, p ≤ 0.001), and seniority of lead surgeon, with junior surgeons three times more likely to have a major complication (OR = 2.982, 95%CI = 1.509-5.894, p = 0.002). Of all surgeries, 50% versus 25% were performed by junior surgeons in LMICs/HICs, respectively. We conclude that LMICs and HICs were associated with similar post-operative major morbidity. Capacity to rescue patients from surgical complications is a tangible opportunity for meaningful intervention.

Time required for indocyanine green fluorescence emission for evaluating bowel perfusion in left-sided colon and rectal cancer surgery.

Indocyanine green fluorescence imaging (ICG-FI) has been reported to be useful in reducing the incidence of anastomotic leakage (AL) in colectomy. This study aimed to investigate the correlation between the required time for ICG fluorescence emission and AL in left-sided colon and rectal cancer surgery using the double-stapling technique (DST) anastomosis. This retrospective study included 217 patients with colorectal cancer who underwent left-sided colon and rectal surgery using ICG-FI-based perfusion assessment at our department between November 2018 and July 2022. We recorded the time required to achieve maximum fluorescence emission after ICG systemic injection and assessed its correlation with the occurrence of AL. Among 217 patients, AL occurred in 21 patients (9.7%). The median time from ICG administration to maximum fluorescence emission was 32s (range 25-58s) in the AL group and 28s (range 10-45s) in the non-AL group (p < 0.001). The cut-off value for the presence of AL obtained from the ROC curve was 31s. In 58 patients with a required time for ICG fluorescence of 31s or longer, the following risk factors for AL were identified: low preoperative albumin [3.4mg/dl (range 2.6-4.4) vs. 3.9mg/dl (range 2.6-4.9), p = 0.016], absence of preoperative mechanical bowel preparation (53.8% vs. 91.1%, p = 0.005), obstructive tumor (61.5% vs. 17.8%, p = 0.004), and larger tumor diameter [65mm (range 40-90) vs. 35mm (range 4.0-100), p < 0.001]. The time required for ICG fluorescence emission was associated with AL.

A study on efficacy of mechanical bowel preparation in case of elective colorectal surgery

Background: There has been a resurgence of interest in the use of mechanical bowel preparation (MBP) and antibiotics before elective colorectal surgery. In the era of antibiotics, the use of MBP is controversial. Aims and Objectives: The aim of the current study was to analyze the effect of MBP over “no MBP” on outcome in patients undergoing elective colorectal surgery. Materials and Methods: This study was an institution-based prospective, randomized and comparative study. Fifty patients, who were planned for elective colorectal surgery between February 2018 and July 2019 in Department of General Surgery, were included in this study. The patients were divided into two groups. Group 1: Surgeries with use of MBP; Group 2: Surgeries without use of MBP. Outcomes of surgeries were analyzed in terms of post-operative anastomotic leak, intra-abdominal septic collections, wound infections, hospital stay, return of IPS, and start of enteral feeding. Results: This study demonstrates that risk of anastomotic leak, wound infection, intra-abdominal collection, and hospital stay were higher among MBP group over non-MBP group and also better outcomes in non-MBP groups in respect to early return of IPS, early oral feeding. Conclusion: Our study proves that no advantage is gained by preoperative MBP in elective colorectal surgery and can be easily avoided to save patients from unwanted exhaustion, distress, and adverse effects related to it.

Effect of preoperative oral antibiotics and mechanical bowel preparation on the prevention of surgical site infection in elective colorectal surgery, and does oral antibiotic regime matter? a bayesian network meta-analysis.

Surgical site infection (SSI) impacts 5-20% of patients after elective colorectal surgery. There are varying reports on the effectiveness of oral antibiotics (OAB) with preoperative mechanical bowel preparation (MBP) in preventing SSI. We aim to determine the role of OAB and MBP in preventing SSI after elective colorectal surgery. We also determine if a specific OAB regimen will be more effective than others. This study investigated the impact of OAB and MBP in patients undergoing elective colorectal surgery. PubMed, MEDLINE, Ovid, Cochrane Central Register of Controlled Trials, ACP Journal Club, and Embase databases were searched for randomized clinical trials (RCTs) published by June 2022. All RCTs comparing various preoperative bowel preparation regimens, including pairwise or multi-intervention comparisons, were included. To establish the role of OAB and MBP in preventing SSI, we conducted a Bayesian network meta-analysis on all RCTs. We further performed subgroup analysis to determine the most effective OAB regimen. Among included 46 studies with a total of 12690 patients, patients in the MBP + OAB group were less likely to have SSI than those having MBP-only (OR 0.55, 95% CrI 0.39-0.76), and without MBP and OAB (OR 0.52, 95% CrI 0.32-0.84). OAB regimen C (kanamycin + metronidazole) and A (neomycin + metronidazole) demonstrated a significantly reduced incidence of SSI, compared to regimen B (neomycin + erythromycin) with OR 0.24 (95% CrI 0.07-0.79) and 0.26 (95% CrI 0.07-0.99) respectively. OAB with MBP reduces the risk of SSI after elective colorectal surgery. Providing adequate aerobic and anaerobic coverage with OAB may confer better protection against SSI.

The role of preoperative mechanical bowel preparation and oral antibiotics in prevention of anastomotic leakage following restorative resection for primary rectal cancer - a systematic review and meta-analysis.

Anastomotic leakage after colorectal cancer resection is a feared postoperative complication seen among up till 10-20% of patients, with a higher risk following rectal resection than colon resection. Recent studies suggest that the combined use of preoperative mechanical bowel preparation and oral antibiotics may have a preventive effect on anastomotic leakage. This systematic review aims to explore the association between preoperative mechanical bowel preparation combined with oral antibiotics and the risk of anastomotic leakage following restorative resection for primary rectal cancer. Three databases were systematically searched in February 2022. Studies reporting anastomotic leakage rate in patients, who received mechanical bowel preparation and oral antibiotics before elective restorative resection for primary rectal cancer, were included. A meta-analysis was conducted based on the risk ratios of anastomotic leakage. Among 839 studies, 5 studies met the eligibility criteria. The median number of patients were 6111 (80-29,739). The combination of preoperative mechanical bowel preparation and oral antibiotics was associated with a decreased risk of anastomotic leakage (risk ratio = 0.52 (95% confidence interval 0.39-0.69), p-value < 0.001). Limitations included a low number of studies, small sample sizes and the studies being rather heterogenous. This systematic review and meta-analysis found that the use of mechanical bowel preparation and oral antibiotics is associated with a decreased risk of anastomotic leakage among patients undergoing restorative resection for primary rectal cancer. The limitations of the review should be taken into consideration when interpreting the results.

Retrospective Analysis of the Outcome of Stoma Closure in Children without Preoperative Mechanical Bowel Preparation.

Stoma closure is one of the most frequently performed surgical procedures by pediatric surgeons worldwide. In this study, we studied the outcome of children undergoing stoma closures without mechanical bowel preparation (MBP) in our department. This is a retrospective observational study of children <18 years undergoing stoma closure from 2017 to 2021. The primary endpoints were surgical site infection (SSI), incisional hernia, anastomotic leak, and mortalities. The categorical data are expressed in percentages and the continuous data are in medians and interquartile ranges. The postoperative complications were classified according to the Clavien-Dindo system. A total of 89 patients underwent stoma closure without bowel preparation during the study. The anastomosis leak and incisional hernia were seen in one patient each. The SSIs occurred in 23 patients (25.9%), which were superficial in 21 and deep in 2 patients. The Clavien-Dindo Grade III complications occurred in 2 (2.2%) patients. The median duration to start feeds and pass first stools was significantly longer in patients with ileostomy closure (P = 0.04 and 0.001, respectively). The outcome of stoma closures without MBP was favorable in our study and hence it can be suggested that the use of MBP in colostomy closures can be safely avoided in children.

Effect of Fast-Track Surgery under ERAS protocol in Laparoscopic Hysterectomy: A Randomized Controlled Trial

Background & Objective: Fast-track surgery (FTS) consists of different pathways to decrease surgical complications and improve outcomes and patient satisfaction. FTS in an elective gynecologic laparoscopic surgery has not been well assessed. No consensus guidelines have been developed for gynecologic laparoscopic surgeries. The purpose of this study is to evaluate enhanced recovery after surgery (ERAS) for total laparoscopic hysterectomy.Materials & Methods: 260 patients underwent for laparoscopic hysterectomy surgery. All patients were divided into two groups as follows: one group received traditional laparoscopic hysterectomy surgery and the intervention group was treated under ERAS protocol. ERAS protocol includes not receiving preoperative mechanical bowel preparation and laxatives as well as fasting 6 h and not drinking liquids 2h before surgery. The patients were allowed to resume the ordinary diet 6h post-operation. Ondansetron 4 mg were prescribed after surgery for nausea and vomiting, pain was controlled with non-narcotic analgesics diclofenac suppository 100 mg/q12 h and paracetamol 1000 mg/q6 h until discharge. Urinary catheter was removed whenever possible and early ambulation occurred 6h after the surgery.Results: A total of 260 patients were studied. Regarding the length of hospitalization, significant differences were shown between the groups (P<0.001). Return to daily functions was occurred earlier in the fast-track surgery group than another group. Complications and VAS pain scores showed no significant differences between the groups.Conclusion: Our results show that ERAS surgery has fewer side effects and better outcomes which make it more suitable for patients undergoing laparoscopic hysterectomy.

Discontinuation of mechanical bowel preparation in advanced ovarian cancer surgery: an enhanced recovery after surgery (ERAS) initiative.

To investigate the impact of discontinuation of mechanical bowel preparation in advanced ovarian cancer surgery within the context of the ERAS program. We retrospectively reviewed the medical records of patients with advanced ovarian cancer who underwent cytoreductive surgery with simultaneous colon and/or rectal resection from January 2012 to November 2020. Patients were divided into two groups based on whether preoperative mechanical bowel preparation (MBP) was given (pre-ERAS) or not (post-ERAS). Patient characteristics, including duration of antibiotic treatment, surgical complexity, and incidence of surgical and nonsurgical complications, were compared. During the study period, 114 patients who underwent colon and/or rectal resection were examined, of whom 39 received MBP and 75 did not receive MBP (NMBP). On comparison between the two groups, no significant differences were noted in the assessed patient characteristics, including mean age, FIGO stage, ASA class, BMI, or residual tumor. One patient (2.6%) in the MBP group, and 4 patients (5.3%) in the NMBP group experienced an anastomotic leakage (p = 0.11). No significant differences were found with respect to surgical site infection. (p = 0.5). MBP was not associated with any specific benefit for advanced ovarian cancer surgery. Gynecologic oncologists who use MBP should consider discontinuing this practice.

Bowel preparation before elective surgery for colorectal cancer

For elective surgery of colorectal cancer, current evidence supports preoperative mechanical bowel preparation combined with oral antibiotics. Meanwhile, for patients with varied degrees of intestinal stenosis, individualized protocol is required to avoid adverse events. We hereby summarize recent high-quality evidences and updates of guidelines and consensus, and recommend stratified bowel preparation based on the clinical practice of our institute as follows. (1) For patients with unimpaired oral intake, whose tumor can be passed by colonoscopy, mechanical bowel preparation and oral antibiotics are given. (2) For patients without symptoms of bowel obstruction but with impaired oral intake or incomplete colonoscopy due to tumor-related stenosis, small-dosage laxative is given for several days before surgery, and oral antibiotics the day before surgery. (3) For patients with bowel obstruction, mechanical bowel preparation or enema is not indicated. We proposed this evidence-based, individualized protocol for preoperative bowel preparation for the reference of our colleagues, in the hope of improving perioperative outcomes and reducing adverse events.

Are preoperative oral antibiotics effective in reducing the incidence of anastomotic leakage after colorectal cancer surgery? Study protocol for a prospective, multicentre, randomized controlled study

IntroductionThe optimal preoperative preparation for elective colorectal cancer surgery has been debated in academic circles for decades. Previously, several expert teams have conducted studies on whether preoperative mechanical bowel preparation and oral antibiotics can effectively reduce the incidence of postoperative complications, such as surgical site infections and anastomotic leakage. Most of the results of these studies have suggested that preoperative mechanical bowel preparation for elective colon surgery has no significant effect on the occurrence of surgical site infections and anastomotic leakage.Methods/designThis study will examine whether oral antibiotic bowel preparation (OABP) influences the incidence of anastomotic leakage after surgery in a prospective, multicentre, randomized controlled trial that will enrol 1500 patients who require colon surgery. The primary endpoint, incidence of anastomotic leakage, is based on 2.3% in the OABP ± mechanical bowel preparation (MBP) group in the study by Morris et al. Patients will be randomized (1:1) into two groups: the test group will be given antibiotics (both neomycin 1 g and metronidazole 0.9 g) the day before surgery, and the control group will not receive any special intestinal preparation before surgery, including oral antibiotics or mechanical intestinal preparation. All study-related clinical data, such as general patient information, past medical history, laboratory examination, imaging results, and surgery details, will be recorded before surgery and during the time of hospitalization. The occurrence of postoperative fistulas, including anastomotic leakage, will be recorded as the main severe postoperative adverse event and will represent the primary endpoint.Ethics and disseminationEthics approval was obtained from the Chinese Ethics Committee of Registering Clinical Trials (ChiECRCT20200173). The results of this study will be disseminated at several research conferences and as published articles in peer-reviewed journals. Protocol was revised on November 22, 2021, version 4.0.Trial registrationChiCTR2000035550. Registered on 13 Aug 2020.

Mechanical and oral antibiotic bowel preparation in ovarian cancer debulking: Are we lowering or just trading surgical complications?

ObjectivesTo examine postoperative complications associated with preoperative mechanical and oral antibiotic bowel preparation (MOABP) for patients with ovarian cancer who underwent bowel resection at cytoreductive surgery (CRS). MethodsThis was a single-institution retrospective study of patients with ovarian cancer undergoing CRS from 01/2011–12/2020 using ICD-10 diagnoses and procedure codes. Patients were stratified by those who underwent bowel resection versus no resection. Bowel resection patients were further stratified by those who underwent MOABP versus no bowel preparation. Patient demographics, tumor data, and perioperative metrics were collected. Unadjusted and adjusted logistic regression evaluated odds of 30-day postoperative complications in patients with bowel resection versus no resection and those with MOABP versus no bowel preparation. ResultsOf 919 patients identified, 215 (23.3%) required bowel resection, which included 81 (37.7%) who received MOABP. Patient characteristics, co-morbidities, and cancer data were similar between MOABP versus no bowel preparation patients. MOABP patients underwent more interval CRS (34.6% versus 9.0%), more optimal surgical resections (96.3% versus 83.8%), fewer diverting ostomies (13.5% versus 33.5%), and shorter hospital stays (7.1 versus 9.4 days) than no bowel preparation patients. On adjusted analyses, MOABP patients experienced significantly lower odds of deep/organ-space surgical infections and 30-day readmissions but higher odds of unplanned intensive care unit (ICU) admissions and grade 3 or higher cardiac and gastrointestinal complications. ConclusionsPatients who underwent preoperative MOABP prior to ovarian cancer CRS with bowel resection had lower odds or deep/organ-space infections and readmissions, shorter hospital stays, fewer diverting ostomies, and more optimal resections. However, these patients also experienced higher odds of ICU admissions and grade 3 or higher cardiac and gastrointestinal complications. The positive and negative postoperative outcomes in this population should be considered in clinical practice.

Intraoperative Colonic Irrigation for Low Rectal Resections With Primary Anastomosis: A Fail-Safe Surgical Model.

AimRegardless the technological developments in surgery, the anastomotic leakage (AL) rate of low rectal anastomosis remains high. Though various perioperative protocols have been tested to reduce the risk for AL, there is no standard peri-operative management approach in rectal surgery. We aim to assess the short-term outcome of a multidisciplinary approach to reduce the rates of ALs using a fail-safe-model using preoperative and intraoperative colonic irrigation in low rectal resections with primary anastomosis.MethodsBetween January 2015 and December 2020, 92 patients received low rectal resections for rectal cancer with primary anastomosis and diverting ileostomy. All these patients received pre-operative mechanical bowel preparation (MBP) without antibiotics as well as intraoperative colonic irrigation. The intraoperative colonic irrigation was performed via the efferent loop of the ileostomy. All data were analyzed by SPSS for descriptive and inferential analyses.ResultsIn the study period, 1.987 colorectal surgical procedures were performed. This study reports AL in 3 (3.3%) of 92 recruited patients. Other postoperative complications (Dindo-Clavien I-IV) were reported in 25 patients (27.2%), which occurred mainly due to non-surgical reasons such as renal dysfunction and sepsis. According to the fail-safe model, AL was treated by endoscopic or re-do surgery. The median postoperative length of hospitalization was 8 days (4–45) days.ConclusionThis study validates the effectiveness of a multi-disciplinary fail-safe model with a pre-operative MBP and an intraoperative colonic irrigation in reducing AL rates. Intraoperative colonic irrigation is a feasible approach that lowers the AL rates by reducing fecal load and by decontamination of the colon and anastomotic region. Our study does not recommend a pre-operative administration of oral antibiotics for colorectal decontamination.

P416 Addition of oral antibiotics to mechanical bowel preparation significantly improves anastomotic healing after ileocolic resection for Crohn’s disease

Abstract Background Addition of oral antibiotics (OA) to mechanical bowel preparation (MBP) is thought to reduce postoperative morbidity compared to MBP alone. However, data supporting this concept in Crohn’s disease patients undergoing ileocolic resection do not exist. Methods Starting, 2016, all ileocolic resections were performed after preoperative MBP combined with OA consisting of two separate dosages of Metronidazole/Neomycine or Metronidazol/Paramomycine. These patients were compared to previous controls undergoing ileocolic resection after mere MBP (1992–2005). Between, 2005 and, 2016, surgeries were performed without preoperative MBP. Patients undergoing an ileocolic resection without construction of anastomosis (i.e., two staged resection) and patients not receiving MBP were excluded from the study. „Anastomotic complications“ were defined as anastomotic leakage, presence of abscess or peritonitis in direct proximity to anastomosis. Results 312 patients underwent ileocolic resections with construction of an anastomosis:, 159 after MBP only and, 153 after preoperative MBP+OA. Patients in MBP+OA group were older (39 y. vs., 35 y., p=0.001), had penetrating disease less frequently (50% vs., 69%, p=0.001), were on biologicals more frequently (31% vs., 1%, p&amp;lt;0.001), on steroids less frequently (12% vs., 59%, p&amp;lt;0.001), underwent laparoscopic surgery more often (80% vs., 15%, p&amp;lt;0.001), and received preoperative parenteral nutrition more often (16% vs., 7%, p=0.033). Patients receiving OA were not able to complete MBP more often (19% vs., 9%, p=0.009). By the multivariate analysis, addition of OA to MBP was associated with a significant reduction of anastomotic complication rate (3% vs., 11%, Hazard ratio, 0.24, p=0.036). Weight loss and steroids were associated with an increased anastomotic morbidity. Conclusion Oral antibiotics added to MBP further improve the anastomotic healing in Crohn’s disease patients undergoing ileocolic resection, although the study has demonstrated an apparent time bias. Further research is needed to clarify whether OA without MBP are as protective as MBP+OA.

Risk Factors and Preventive Measures for Anastomotic Leak in Colorectal Cancer.

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

Primary colorectal anastomosis, no preparation, no stoma needed

Background: Mechanical bowel preparation was regarded for a long time as a vital prerequisite for successful colorectal surgery; this is now being questioned. The distressful effect of bowel preparation, alongside the safety of primary colorectal anastomosis in emergency cases, has led to a considerable change in the surgical protocol, making primary repair and anastomosis after colon resection safer without bowel preparation, and the role of colostomy has changed from mandatory to optional. Aim: To assess whether colorectal surgery can be performed safely without mechanical bowel preparation or colostomy. Method: A series of 130 patients, who underwent elective and emergency colorectal surgery, were followed prospectively over a three-year period in Al Bashir Teaching Hospital, Amman, Jordan. The patients were randomized into two groups. In one group (preparation group) 66 elective patients were selected from the outpatient department; the bowel was prepared using Fortran’s solution. In the second group (non-preparation group), 64 patients were selected from the emergency and outpatient departments, no bowel preparation was used. Colostomy was omitted in both groups. The main outcomes regarding operative time, hospital stay, rate of postoperative wound infection, anastomotic leak and intra-abdominal abscess were compared between the two groups. Results: Malignancy was the most prevalent pathology in both the preparation and non-preparation groups, 75.7% and 62.5% respectively, while benign diseases were present in up to 24.2% of the preparation group and in 1.5% of the non-preparation group. Anastomosis was ileo-colic in 33.3% and 37.5%, colo-colic or colo-rectal in 66.6% and 62.5% of the preparation and non-preparation groups respectively. There was no significant statistical difference in the overall postoperative complication rates between the two groups, 16.6% in the preparation group and 14% in the non-preparation group. Postoperative wound infection, wound dehiscence, intra-abdominal abscess and anastomotic leak occurred in 9.09%, 1.5%, 1.5% and 4.5% in the preparation group, as compared to 7.8%, 3.1%, 0% and 3.1% in the non-preparation group respectively. The mortality rate was nil in both groups. Conclusion: Resection of colorectal pathology followed by primary anastomosis, without stoma, can be performed safely with the omission of preoperative mechanical bowel preparation.