Risk factors for future repeat abdominal surgery

Indications, risk factors, and clinical outcomes of relaparotomy after abdominal trauma surgery

BACKGROUND

Relaparotomy following abdominal trauma surgery is a critical intervention associated with significant morbidity and mortality. However, data on relaparotomy in trauma patients remain limited. This study aimed to evaluate the impact of relaparotomy-related factors on prognosis in patients undergoing relaparotomy after abdominal trauma surgery.

METHODS

This retrospective study analyzed adult patients who underwent relaparotomy following abdominal trauma surgery at a single center between December 2016 and December 2022. Demographic characteristics, trauma-related features, and perioperative clinical findings were recorded. Statistical analyses were conducted to identify factors associated with in-hospital mortality.

RESULTS

Among 300 patients who underwent abdominal trauma surgery, 106 (35.3%) required relaparotomy. The in-hospital mortality rate was 9.4%. Major indications for relaparotomy included hemorrhage control, hemodynamic instability, and intestinal leaks. Factors significantly associated with increased mortality included age ≥50 years (p=0.020), female sex (p=0.031), blunt trauma (p=0.020), multiple relaparotomies (p=0.023), active hemorrhage during relaparotomy (p<0.001), and fresh frozen plasma transfusion (p=0.046). Additionally, non-survivors demonstrated significantly lower blood pressure (p<0.001) and higher heart rates (p<0.001). They also presented with decreased levels of hemoglobin (p=0.015), platelet counts (p=0.001), and albumin (p<0.001), along with elevated international normalized ratio (INR) (p<0.001) and lactate levels (p<0.001).

CONCLUSION

This study highlights key factors associated with mortality in patients undergoing relaparotomy after abdominal trauma surgery. Early recognition and optimization of risk factors, along with the management of active hemorrhage, careful monitoring of vital signs and laboratory parameters, and special attention to high-risk groups such as older patients and those with blunt trauma, may improve outcomes in this vulnerable population.

Risk factors for wound complications after associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) compared to repeated liver resection - a propensity score matching analysis

AIM

Sufficient liver function is crucial in extracellular matrix growth, hemostasis, and wound healing. Repeated abdominal surgery is a known risk factor for the development of wound complications. This study aimed to evaluate this high-risk constellation in patients undergoing associated liver partition and portal vein ligation for staged hepatectomy (ALPPS) and repeated liver resections (RLR) in comparison to single liver resection (SLR).

METHOD

Forty patients who underwent ALPPS between 2011 and 2020 were evenly matched with patients undergoing RLR or SLR (n = 40 per group) using propensity scores. Postoperative outcomes were compared and factors associated with wound complications were analyzed.

RESULTS

Postoperative wound complications were significantly more frequent in ALPPS group (p = 0.001). The reoperation rate was not significantly different between the three groups (p = 0.143). However, surgical reintervention due to wound complications occurred more frequently in the ALPPS group in relation to RLR and SLR (17.5% vs. 7.5% and 5% respectively). Length of stay was significantly longer in the ALPPS group (p = 0.033). ALPPS was an independent risk factor for postoperative wound complication (OR = 8.55, 95% CI:1.07-68.44, p = 0.043). Risk factor analysis identified age ≥ 60 years (OR = 27.64, 95% CI:3.09-246.75, p = 0.003), BMI ≥ 30 kg/m2 (OR = 30.21, 95% CI:3.35-271.83, p = 0.002), and low postoperative albumin levels (OR = 168.41, 95% CI:7.76-3651.18, p = 0.001) as independent predictors of postoperative wound complications after major liver resection.

CONCLUSION

Patients undergoing ALPPS and RLR are faced with a high risk of developing wound complications. Older age, obesity, a history of previous abdominal surgery, and a decreased postoperative albumin level were independent risk factors for wound complications.

Abdominal Gynecologic Procedures in Pancreas Transplant Recipients

INTRODUCTION

With the growing population of pancreas transplant recipients followed long-term, some female recipients are going to require surgical intervention for gynecologic symptoms and pathologies. Currently, there is a lack of literature describing how to approach this population and whether pelvic gynecologic procedures (GYN) can be performed safely given the proximity of the pancreatic (and possibly renal) allograft. In this single-center retrospective analysis, all pancreas transplant recipients that subsequently underwent GYN were reviewed.

METHODS

Subjects were identified by cross-referencing all pancreas transplants performed between January 2003 and December 2022 for any subsequent GYN. Demographics at transplant and GYN, indications and procedure performed, operative time, presence and involvement of a transplant surgeon, complications length of stay, and readmissions were reviewed.

RESULTS

Seventeen patients who underwent a total of 19 GYN after pancreas transplantation were identified. Operations performed included tubal ligation (n = 2), total abdominal hysterectomy with (n = 6) or without bilateral salpingectomy (n = 2), oophorectomy versus cyst drainage (n = 2), bilateral oophorectomy (n = 1), and unilateral (n = 4) versus bilateral (n = 2) salpingectomy. Four were performed through an open laparotomy and 15 were performed laparoscopically. In 11 cases, a transplant surgeon was involved intra-operatively. Eight of the 17 patients developed post-operative complications including post-operative fevers, fluid overload, neutropenia, elevated creatinine (n = 2), nephrolithiasis, urinary tract infection, and incisional hernia. Five required readmission.

CONCLUSION

GYN can be performed safely following pancreas transplantation, but careful planning and the involvement of the transplant surgery team are advised.

Magnitude of in-hospital mortality and its associated factors among patients undergone laparotomy at tertiary public hospitals, West Oromia, Ethiopia, 2022

INTRODUCTION

Laparotomy surgery, which involves making an incision in the abdominal cavity to treat serious abdominal disease and save the patient's life, causes significant deaths in both developed and developing countries, including Ethiopia. The number studies examining in-hospital mortality rates among individuals that undergone laparotomy surgery and associated risk factors is limited.

OBJECTIVE

To assess the magnitude of in-hospital mortality and its associated factors among patients undergone laparotomy at tertiary hospitals, West Oromia, Ethiopia, 2022.

METHODS

An institutional based retrospective cross-sectional study was conducted from January 1, 2017, to December 31, 2021. Data were collected using systematic random sampling and based on structured and pretested abstraction sheets from 548 medical records and patient register log. Data were checked for completeness and consistency, coded, imported using Epi-data version 4.6, cleaned and analyzed using SPSS version 25 software. Variables with p < 0.2 in the Bi-variable logistic regression analysis were included in the multivariate logistic regression analysis. The fit of the model was checked by the Hosmer‒Lemeshow test. Using the odds ratio adjusted to 95% CI and a p value of 0.05, statistical significance was declared.

RESULTS

A total of 512 patient charts were reviewed, and the response rate was 93.43%. The overall magnitude of in-hospital mortality was 7.42% [95% CI: 5.4-9.8]. American society of Anesthesiology physiological status greater than III [AOR = 7.64 (95% CI: 3.12-18.66)], systolic blood pressure less than 90 mmHg [AOR = 6.11 (95% CI: 1.98-18.80)], preoperative sepsis [AOR = 3.54 (95% CI: 1.53-8.19)], ICU admission [AOR = 4.75 (95% CI: 1.50-14.96)], and total hospital stay greater than 14 days [(AOR = 6.76 (95% CI: 2.50-18.26)] were significantly associated with mortality after laparotomy surgery.

CONCUSSION

In this study, overall in- hospital mortality was high. Early identification patient's American Society of Anesthesiologists physiological status and provision of early appropriate intervention, and pays special attention to patients admitted with low systolic blood pressure, preoperative sepsis, intensive care unit admission and prolonged hospital stay to improve patient outcomes after laparotomy surgery.

Tailored Pre-Operative Antibiotic Prophylaxis to Prevent Post-Operative Surgical Site Infections in General Surgery

The average American today undergoes three inpatient and two outpatient surgical procedures during one's life, each of which carries with it a risk of post-operative infection. It has long been known that post-operative infections cause significant morbidity in the immediate peri-operative period, but recent evidence suggests that they can have long-term consequences as well, increasing a patient's risk of infectious complications in unrelated surgeries performed months or even years later. While there are several theories on the origin of this association, including bacterial colonization of a post-operative infectious wound site, antimicrobial resistance from curative courses of antibiotics, subclinical immunosuppression, or the creation of an inflammatory "pathobiome" following an infectious insult, it is ultimately still unclear why patients who experience a single post-operative infection seem to be at a significantly higher risk of experiencing subsequent ones. Regardless, this association has significant implications for the routine use of pre-operative antibiotic prophylaxis. Indeed, while the prescription of antibiotics pre-operatively has dramatically reduced the rate of post-operative infections, the chosen prophylaxis regimens are typically standardized according to national guidelines, are facing increasing antimicrobial resistance patterns, and have been unable to reduce the risk of post-operative infection to acceptably low levels for certain surgeries. As a result, some clinicians have speculated that tailoring pre-operative antibiotic prophylaxis according to a patient's prior infectious and operative history could improve efficacy and further reduce the rate of post-operative infections. The purpose of this review is to describe the evidence for the link between multiple post-operative infections and explore the efficacy of individualized pre-operative prophylaxis.

Predicting long-term risk of reoperations following abdominal and pelvic surgery: a nationwide retrospective cohort study

BACKGROUND

The risk of reoperations after abdominal and pelvic surgery is multifactorial and difficult to predict. The risk of reoperation is frequently underestimated by surgeons as most reoperations are not related to the initial procedure and diagnosis. During reoperation, adhesiolysis is often required, and patients have an increased risk of complications. Therefore, the aim of this study was to provide an evidence-based prediction model based on the risk of reoperation.

MATERIALS AND METHODS

A nationwide cohort study was conducted including all patients undergoing an initial abdominal or pelvic operation between 1 June 2009 and 30 June 2011 in Scotland. Nomograms based on multivariable prediction models were constructed for the 2-year and 5-year overall risk of reoperation and risk of reoperation in the same surgical area. Internal cross-validation was applied to evaluate reliability.

RESULTS

Of the 72 270 patients with an initial abdominal or pelvic surgery, 10 467 (14.5%) underwent reoperation within 5 years postoperatively. Mesh placement, colorectal surgery, diagnosis of inflammatory bowel disease, previous radiotherapy, younger age, open surgical approach, malignancy, and female sex increased the risk of reoperation in all the prediction models. Intra-abdominal infection was also a risk factor for the risk of reoperation overall. The accuracy of the prediction model of risk of reoperation overall and risk for the same area was good for both parameters ( c -statistic=0.72 and 0.72).

CONCLUSIONS

Risk factors for abdominal reoperation were identified and prediction models displayed as nomograms were constructed to predict the risk of reoperation in the individual patient. The prediction models were robust in internal cross-validation.

Is Previous Postoperative Infection an Independent Risk Factor for Postoperative Infection after Second Unrelated Abdominal Operation?

BACKGROUND

Infections after abdominal surgery remain a significant problem. Although preoperative antibiotic prophylaxis is a primary strategy used to reduce postoperative infections, it is typically prescribed based on standardized protocols, without attention to previous infection or antibiotic history. Patients with a previous infection after surgery may be at higher risk for infectious complications after subsequent operations owing to antibiotic resistance. We hypothesized that a previous postoperative infection is a significant risk factor for the development of infection after a second unrelated surgery.

STUDY DESIGN

We performed a retrospective study of patients who had undergone 2 unrelated abdominal operations at a tertiary care center from 2012 to 2018. Clinical variables and microbiological culture results were abstracted. Univariate and multivariable regression models were constructed.

RESULTS

Of 758 patients, 15.0% (n = 114) developed an infection after the first operation. After the second operation, 22.8% (n = 26) of those with a previous infection developed another infection, whereas the incidence of an infection after the second operation was only 9.5% (n = 61) in patients who did not develop an infection after the first operation. Multivariable analysis demonstrated that previous infection (odds ratio 2.49, 95% CI 1.46 to 4.25) was associated with future infection risk. Microbiological analysis found that infections after the second surgery were significantly more likely to be antibiotic resistant than infections after the first surgery (82.3% vs 64.1%; p = 0.036). Strikingly, 49% of infections after the second surgery were resistant to the antibiotic prophylaxis given at the time of incision.

CONCLUSIONS

Previous postoperative infection is an independent risk factor for a subsequent postoperative infection and is associated with resistance to standard prophylaxis. Individualization of antibiotic prophylaxis in patients with a previous postoperative infection is warranted.

Preliminary Analysis of Safety and Feasibility of a Single-Hole Laparoscopic Myomectomy via an Abdominal Scar Approach

Purpose

This paper aims to explore the safety and feasibility of a single-hole laparoscopic myomectomy through an abdominal scar approach.

Method

The clinical data of seven patients who underwent the single-hole laparoscopic myomectomy via the abdominal scar approach from January to November 2021 in the Department of Gynecology, the Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, were studied retrospectively. The duration of operation, the intraoperative blood loss, the decrease of postoperative hemoglobin, and the postoperative visual analogue score (0 points: no pain, 10 points: maximum pain) were recorded.

Results

All seven patients received the operation successfully, without changing to the conventional laparoscopic operation or open appendectomy. The average blood loss was 101.42 ± 7.89 ml, the average length of hospital stay was 5 ± 0.53 days, the average operation duration was 130 ± 26.86 min, and the 24-h pain score was 1.57 ± 0.53. The seven patients had no intraoperative or postoperative complications and no damage to the ureter or bladder. All patients could urinate spontaneously without urinary retention or urinary tract infection after catheter removal. No analgesic drugs were used after the operation.

Conclusion

The single-hole laparoscopic myomectomy via the abdominal scar approach is a more aesthetic and feasible option for eligible patients, but more cases and studies are needed for further confirmation.

Nomogram for predicting chylous ascites after right colectomy

BACKGROUND

Chylous ascites following right colectomy has a high incidence which is a critical challenge. At present, there are few studies on the factors affecting chylous ascites after right colectomy and especially after D3 Lymphadenectomy. A predictive model for chylous ascites has not yet been established. Therefore, we created the first nomogram to predict the incidence of chylous ascites after right hemicolectomy.

AIM

To analyze the risk factors for chylous ascites after right colectomy and establish a nomogram to predict the incidence of chylous ascites.

METHODS

We retrospectively collected patients who underwent right hemicolectomy between January 2012 and May 2021 and were pathologically diagnosed with cancer. Multivariate logistic regression was used to analyze the influencing factors of chylous ascites and a nomogram was established. The predictive ability was assessed by the area under the receiver operating characteristic (ROC) curve.

RESULTS

Operative time, the type of operation (standard or extended), the number of lymph nodes retrieved, and somatostatin administration were considered important risk factors. Multivariate logistic regression and nomograms can be used to accurately predict whether chylous ascites occurs. The area under the ROC curve of the model is 0.770. The C-statistic of this model is 0.770 which indicates that it has a relatively moderate ability to predict the risk of chylous ascites.

CONCLUSION

We found a novel set of risk factors, created a nomogram, and validated it. The nomogram had a relatively accurate forecasting ability for chylous ascites after right hemicolectomy and can be used as a reference for risk assessment of chylous ascites and whether to prevent it after surgery.

Effects of Oral Zafirlukast, Sildenafil, or Pirfenidone on the Formation of Postsurgical Intra-abdominal Adhesions in an Experimental Rat Model

INTRODUCTION

Intra-abdominal adhesions' main etiology is surgical procedures that commonly require reintervention. Oral treatments with Sildenafil, Zafirlukast, and Pirfenidone have yielded decreased severity of fibrotic phenomena secondary to the introduction of foreign material. This study aimed to evaluate the efficacy of oral Zafirlukast, Sildenafil or Pirfenidone treatment on reducing or preventing intra-abdominal adhesions in an experimental rat model.

METHODS

Four groups, each of 10 male Wistar rats weighing 250-300 g, were used. A midline laparotomy was used to excise an area of 1.5´1.5cm and reconstructed with polypropylene mesh fixed to the abdominal wall. After 12 h, oral doses of Zafirlukast (1.25 mg/kg, group B), Sildenafil (15 mg/kg, group C), or Pirfenidone (500 mg/kg, group D) were given every day for eight days. The control group, A, received no treatment. At day nine, animals were reoperated. The implant was resected after ethically approved euthanasia and specimens were fixed in 10% formaldehyde for histopathology.

RESULTS

Control group A yielded adhesions with greater fibrovascular density and neighboring organ involvement than the other groups (P = 0.001), as well as intense inflammatory infiltrates and numerous granulomas (P = 0.04). Adhesions in group C had less fibrovascular density (P = 0.03) with decreased serosal injuries (P = 0.001) and less organ involvement. Group D had reduced adhesions without organ involvement (P < 0.01), and less inflammatory infiltrates, collagen fibers, and foreign body granulomas than groups B or C (P < 0.01).

CONCLUSIONS

Oral administration of these agents did not prevent adhesions but ameliorated them. Oral Pirfenidone offered the best performance and could be recommended for human use.

Risk factors for abdominal reoperations in bariatric patients

BACKGROUND

With a growing bariatric population, a better understanding of the patient and health provider-related factors associated with later reoperations could help providers enhance follow-up and develop reliable benchmarking targets.

OBJECTIVES

To investigate the patient and provider-related risk factors associated with abdominal reoperations in bariatric patients.

SETTING

This is a cohort study using data from a large clinical registry of Ontario bariatric patients between 2010 and 2016.

METHODS

A multilevel mixed effect logistic regression model using hospital and surgeon identifiers as random effects was performed to adjust for clustering of patients. The primary outcome was any abdominal operation performed within 2 years of primary bariatric surgery.

RESULTS

Among a cohort of 10,946 bariatric patients (86.6% receiving gastric bypass surgery), 15.8% underwent an abdominal operation within 2 years and about a third of these were urgent. The multilevel analysis demonstrated that 98% of patient variation among reoperations was a result of patient characteristics rather than disparities between surgeons or center experience. Type of procedure was not a significant factor after adjustment for surgeon and hospital level experience (OR [odds ratio] .85, 95% CI [confidence interval] .70-1.03). Concurrent abdominal wall (OR 2.40, 95% CI 1.26-4.59), hiatal hernia repairs (OR 1.29, 95% CI 1.02-1.62), and previously higher health care users (OR 1.30, 95% CI 1.15-1.46) were most significantly associated with reoperations.

CONCLUSION

Reoperations are significantly more common among certain bariatric patients, especially those undergoing concurrent hernia procedures. Reoperations were not associated with provider-related factors and may not be a suitable target for health provider benchmarking.

Treating post-renal transplant surgical site infection with combination therapy: a case study

Surgical site infection (SSI) is one of the most common and debilitating complications of surgery. The risk of SSI rises if the patient has underlying health-related risk factors. This article reports on the complicated case of 61-year-old female with a history of obesity and diabetes. She was diagnosed with end-stage renal disease (ESRD) and had been receiving haemodialysis since 2012. She underwent a kidney transplant and developed a multidrug-resistant Pseudomonas aeruginosa SSI following surgery. She experienced delayed wound healing with a partially dehisced incision. Despite conventional wound care, there was no progress in wound healing. The authors combined sharp debridement, irrigation and antibiotic therapy with a silver-containing antimicrobial dressing for 1 month. Her SSI improved significantly and she returned to theatre for wound closure. The patient recovered well and was discharged from the hospital after suture removal. Wound care professionals can use combination therapies to manage SSIs effectively and reduce patient and healthcare costs.

Hyaluronate carboxymethylcellulose sheets for the prevention of adhesive complications: a model-based cost-utility analysis

AIM

Clinical trials suggest that hyaluronate carboxymethylcellulose (HA/CMC) prevents adhesion-related complications after intra-abdominal surgery, but at a high upfront cost. This study evaluated the cost-effectiveness of HA/CMC for patients undergoing curative-intent open colorectal cancer surgery.

METHODS

Using a Markov Monte Carlo microsimulation model, we conducted a cost-utility analysis comparing the cost-effectiveness of HA/CMC at curative-intent open colorectal cancer surgery versus standard management. We considered a scenario where HA/CMC was used at the index operation only, as well as where it was used at the index operation and any subsequent operations. The perspective was that of the third-party payer. Costs and utilities were discounted 1.5% annually, with a 1-month cycle length and 5-year time horizon. Model input data were obtained from a literature review. Outcomes included cost, quality-adjusted life-years (QALYs), small bowel obstructions (SBOs) and operations for SBO.

RESULTS

Using HA/CMC at the index operation results in an incremental cost increase of CA$316 and provides 0.001 additional QALYs, for an incremental cost-effectiveness ratio of CA$310,000 per QALY compared to standard management. In our simulated cohort of 10,000 patients, HA/CMC prevented 460 SBOs and 293 surgeries for SBO. Probabilistic sensitivity analysis found that HA/CMC was cost-effective in 18.5% of iterations, at a cost-effectiveness threshold of CA$50,000 per QALY. Results of the scenario analysis where HA/CMC was used at the index operation and any subsequent operations were similar.

CONCLUSIONS

Hyaluronate carboxymethylcellulose prevents adhesive bowel obstruction after open colorectal cancer surgery but is unlikely to be cost-effective given minimal long-term impact on healthcare costs and QALYs.

Effectiveness of barrier agents for preventing postoperative bowel obstruction after laparoscopic surgery: a retrospective cohort study

PURPOSE

The effectiveness of using anti-adhesion agents in laparoscopic surgery is controversial. We compared the outcomes of patients exposed to anti-adhesion agents (barrier group) with those of patients not exposed (no barrier group) in laparoscopic surgery.

METHODS

Using a nationwide claim-based database in Japan, we analyzed data from patients who underwent laparoscopic surgery between 2005 and 2019 and compared the patient characteristics and the proportion of those with bowel obstruction between the barrier and no barrier groups. We also performed several sensitivity and subgroup analyses.

RESULTS

Of the 57,499 patients who met the inclusion criteria, 14,360 and 43,139 were assigned to the barrier and no barrier groups, respectively. The proportion of patients with a bowel obstruction in the two groups did not differ among all patients hospitalized for obstruction (1.1 vs. 1.1%, p = 0.63) and those requiring surgery (0.2 vs. 0.2%, p = 0.39). In the sensitivity analysis with propensity score matching, the incidences of bowel obstruction between the barrier and non-barrier groups were equivocal (1.3 vs. 1.6%), but statistically marginal (chi-square test, p = 0.035; log-rank test, p = 0.09).

CONCLUSION

The use of barrier agents for adhesive prevention did not show clear effectiveness for the prevention of bowel obstruction after laparoscopic surgery for unselected cases. Further studies focusing on more specific procedures are needed.

Enhanced-view totally extraperitoneal (eTEP) approach for the treatment of abdominal wall hernias: mid-term results

INTRODUCTION

Multiple minimally invasive techniques have been described for ventral hernia repair. The recently described enhanced view totally extraperitoneal (eTEP) ventral hernia repair seems an appealing option since it allows to address midline and lateral hernias, placing the mesh in the retromuscular position without the use of traumatic fixation.

AIM

To report on the mid-term result of a series of patients with ventral hernias repaired by the eTEP approach.

METHODS

A retrospective analysis of our case series between June 2017 and December 2019. Demographic and clinical data were gathered. Hernia characteristics, surgical details, hernia recurrences, and complications are reported.

RESULTS

66 patients were included in the study. Median follow-up was 22 months (interquartile range 12-26). 60% of patients were male. Mean age, BMI, % of Type-2 diabetes and % of smoking were 59 ± 12 years, 30 kg/m², 24% and 23%, respectively. Mean hernia defect size was 5.5 ± 2.9 cm. Forty-three eTEP Rives-stoppa and 23 eTEP-Transversus abdominis release (14 unilateral, 9 bilateral) were performed. 22 inguinal hernias and 15 lateral defects were simultaneously repaired. We report 1 recurrence (1.5%) and 10 surgical site occurrences (15%; 6 seromas, 2 hematomas and 2 surgical site infections). Four patients required reinterventions (6%).

CONCLUSION

eTEP is a promising approach to treat midline hernias and allows the simultaneous treatment of lateral and inguinal defects, keeping the mesh in the retromuscular position. However, comparative studies must be performed to know its real benefit in laparoscopic ventral hernia repair.

Standard of Care and Outcomes of Primary Laparotomy Versus Laparotomy in Patients with Prior Open Abdominal Surgery (ReLap Study; DRKS00013001)

BACKGROUND

Patients undergoing relaparotomy are generally underrepresented in trials, despite how common the procedure is in clinical practice. The aim of this trial was to determine standard of care and gain evidence of intra- and postoperative outcomes for patients undergoing relaparotomy compared to primary laparotomy.

METHODS

In this single-center controlled clinical trial, adult patients scheduled for elective abdominal surgery via relaparotomy or primary laparotomy were consecutively screened for eligibility. The perioperative course was monitored prospectively in five study visits during hospital stay and one study visit 1 year after surgery. Intraoperative standards, short and long-term outcomes were statistically explored at a level of significance of 5%.

RESULTS

A total of 131 patients with relaparotomy and 50 patients with primary laparotomy were analyzed. In the relaparotomy group, the access to the abdomen took longer (23.5 min vs. 8.8 min; p = < 0.001) and the peritoneal adhesion index was higher (10.8 vs. 0.4; p = < 0.001). Inadvertent enterotomies were more frequent in the relaparotomy group (relaparotomy 0.3 versus primary laparotomy: 0.0; p = 0.002). The overall comprehensive complication index and rates of surgical site infection and wound dehiscence with evisceration were not different between the two groups. At long-term follow-up, rates of incisional hernia did not differ (relaparotomy: n = 12/104 (11.5%); primary laparotomy: n = 7/35 (20.0%); p = 0.208).

DISCUSSION

In this first prospective comparison of relaparotomy with primary laparotomy, inadvertent enterotomies were more frequent in the relaparotomy group. However, contrary to previous retrospective studies, the risk of complications and incisional hernias was not increased compared to primary laparotomy.

TRIAL REGISTRATION

Deutsches Register Klinischer Studien ( www.germanctr.de ): DRKS00013001.

[REPARATIVE SURGERY OF PRESSURE-REGULATING BALLOON HERNIA AFTER ARTIFICIAL URINARY SPHINCTER REPLACEMENT: A CASE REPORT]

A 74-year-old male with post-prostatectomy incontinence underwent artificial urinary sphincter replacement due to device malfunction. Three months after the replacement surgery, he presented for a consultation due to a bulging area in his lower abdomen. Computed tomography revealed a hernia of the pressure-regulating balloon (PRB), while the device was working well. In the reparative surgery, reopening the lower abdominal incision, the PRB was carefully restored to its previous position after creating a sufficient submuscular space. As the rectus abdominis fascia showed an adequate strength, the fascia was tightly sutured without using a prosthetic mesh. Thereafter, the patient has been free from incontinence for two and a half years without hernia recurrence. Given the mechanical nature of the device, replacement surgery is sometimes required over time. Tissue fragility due to repetitive surgeries and increasing ambient pressure due to space reduction derived from the PRB deflation could cause PRB hernia. Such cases can be treated under careful manipulation without damaging the device. Considering the future potential need for repeated surgery, it would be preferable not to use prosthetic mesh, as it can cause dense adhesion.

Factors associated with the development of acute general surgical pathology in medical in-patients

BACKGROUND

Medical inpatients can develop acute general surgical conditions. However, this is rare. The presence of multiple acute pathologies delays diagnosis and these patients have poorer prognoses.

AIM

To determine the incidence, risk factors and prognosis of medical inpatients developing acute general surgical conditions.

METHODS

A single-centre retrospective case-control study was conducted over one year in the United Kingdom. Medical patients developing acute surgical pathology were identified using the local referral system. For each case, two controls were selected from a pool of medical in-patients receiving no general surgical input during their admission. Patient records were used to collect hospital admission details, demographic and laboratory data. Univariate analysis and multi-variable analysis were performed.

RESULTS

The study included 42 cases and 84 controls. The incidence of general surgical pathology in medical in-patients was 2.3/1000 admissions/year. In multivariate analysis, risk factors associated with developing general surgical pathology were previous abdominal surgery (Odds Ratio [OR] =3.68, 95% Confidence interval [CI]: 1.43 to 9.48, p=0.007) and doubling from baseline creatinine (OR=18.9, 95%CI: 2.57 to 139, p=0.004). Patients with surgical pathology had longer in-patient stays (22.8 vs 9.4 days, p<0.001) and a higher inpatient mortality (23.8% vs 7.1%, p=0.011). Development of surgical pathology was strongly associated with mortality (OR=4.06, 95%CI: 1.36 to 12.1).

CONCLUSION

The development of acute surgical pathology in medical in-patients is rare but associated with longer in-patient stays and higher mortality. We have identified risk-factors associated with the development of surgical pathology which can be used to identify patients at risk of surgical pathology. This article is protected by copyright. All rights reserved.

The Impact of Previous Abdominal Surgery in a High-Acuity Liver Transplant Population

BACKGROUND

It is not uncommon for liver transplant (LT) recipients to have had previous abdominal surgery (PAS) preceding transplant. The impact of PAS on morbidity and mortality in LT patients remains unclear. In this study, we investigated the correlation between PAS and LT outcomes in a high-acuity patient population.

MATERIALS AND METHODS

This is a single-center retrospective review of 936 adult primary LT recipients between 2012 and 2018. Patients were divided based on PAS history. PAS was subdivided into upper abdominal surgery (UAS) and lower abdominal surgery (LAS). UAS was separated into high-impact UAS and low-impact UAS. Finally, we studied patients with PAS ≤90 d versus PAS >90 d.

RESULTS

Extensive adhesiolysis was the only significant perioperative factor between the PAS group (n = 367) and the non-PAS group (n = 569) (P < 0.001). Red blood cell (RBC) transfusion (20U versus 17U, P = 0.044) and abdominal packing (24.2% versus 13.3%, P = 0.008) were significantly higher in the UAS group (n = 186) versus the LAS group (n = 181). Patients with high-impact UAS required greater RBC (P = 0.021) and fresh frozen plasma transfusion (P = 0.005), and arterial conduits (P = 0.016) during LT. Compared with recipients with PAS >90 d (n = 338), recipients with PAS ≤90 d (n = 29) had significantly higher RBC transfusion (P = 0.046), fresh frozen plasma transfusion (P = 0.022), and abdominal packing (P = 0.025). No differences in patient and graft survival was observed.

CONCLUSIONS

These findings suggest that, with appropriate care in the perioperative setting, PAS is not a contraindication to successful LT. Careful consideration is warranted when risk stratifying patients with multiple comorbidities who had PAS, especially those with UAS or PAS ≤90 d.

Induced pluripotent stem cell-derived enteric neural crest cells repopulate human aganglionic tissue-engineered intestine to form key components of the enteric nervous system

Models for enteric neuropathies, in which intestinal nerves are absent or injured, are required to evaluate possible cell therapies. However, existing options, including transgenic mice, are variable and fragile. Here immunocompromised mice were implanted with human pluripotent stem cell–derived tissue-engineered small intestine 10 weeks prior to a second survival surgery in which enteric nervous system precursor cells, or saline controls, were injected into the human intestinal organoid–derived tissue-engineered small intestine and analyzed 4 weeks later. Human intestinal organoid–derived tissue-engineered small intestine implants injected with saline as controls illustrated formation of intestinal epithelium and mesenchyme without an enteric nervous system. Second surgical introduction of human pluripotent stem cell–generated enteric nervous system precursors into developing human intestinal organoid–derived tissue-engineered small intestine implants resulted in proliferative migratory neuronal and glial cells, including multiple neuronal subtypes, and demonstrated function in contractility assays.

Comparison of the Effect of Inhalation Aromatherapy with 10% and 30% Peppermint Essential Oils on the Severity of Nausea in Abdominal Surgery Patients

Background

One of the most common surgical complications is nausea. Regarding the contradictory findings on the effect of aromatherapy with peppermint on the severity of nausea, in the present study, we aimed at comparing the effect of aromatherapy with 10% and 30% peppermint essential oils on the severity of nausea in surgical patients.

Methods

This single-blind randomized controlled trial was conducted at the surgical ward of Imam Reza Hospital in Kermanshah, Iran. A total of 120 patients undergoing abdominal surgery were randomly divided into three groups of 10% peppermint, 30% peppermint, and control (40 patients in each group) using a random number table. In each of the intervention groups, 0.2 ml of 10% and 30% peppermint essential oil was inhaled. In the control group, the same amount of distilled water colored with green food coloring was inhaled. The severity of nausea was measured by nausea visual analog scale (NVAS) before and 10 minutes after the intervention.

Results

In the 10% peppermint group, the mean severity of nausea before the intervention was 52.3 ± 13.7 out of 100, which reduced to 40.5 ± 13.5 after the intervention (p < 0.001). In the 30% peppermint group, the mean severity scores of nausea before and after the intervention were 60.2 ± 15.0 and 39.7 ± 12.4, respectively (p < 0.001). In the control group, the mean severity scores of nausea before and after the intervention was not statistically significant. There was no significant difference between the two intervention groups in terms of the mean severity of nausea after the intervention.

Conclusions

It can be concluded that 10% and 30% peppermint essential oils are equally effective on the severity of nausea.

A Short Series of Laparoscopic Mesenteric Bypasses for Chronic Mesenteric Ischemia

Background

Laparoscopic aortomesenteric bypass may be performed to treat the chronic mesenteric ischemia patients who are not suitable for endovascular treatment. This study presents an initial experience with a limited series of laparoscopic mesenteric artery revascularization for the treatment of mesenteric ischemia.

Methods

Chronic mesenteric ischemia (CMI) patients with previous unsuccessful endovascular treatment or with arterial occlusion and extensive calcification precluding safe endovascular treatment were offered laparoscopic mesenteric revascularization. From October 2015 until November 2018, nine patients with CMI underwent laparoscopic revascularization. In addition to demographic data and perioperative results of the treatment, graft patency was assessed with Duplex ultrasound at 1, 3, 6 and 12 months, and annually thereafter. A descriptive analysis of the data was performed.

Results

All bypasses were constructed with an 8 mm ring enforced expanded polytetrafluoroethylene graft in a retrograde fashion (from infrarenal aorta or iliac artery) to either superior mesenteric artery or splenic artery (2 cases). Median operation time was 356 mins (range 247–492 mins). Five patients had a history of unsuccessful endovascular treatment. Laparoscopic technical success was 78%, and the primary open conversion rate was 22%. All laparoscopic revascularization procedures remained patent after discharge during a median follow-up time of 26 months (range 18–49 months). The primary graft patency at 30 days was 78%. Primary assisted, and secondary graft patency was 78% and 100%, respectively. Median weight gain was 2 kg (range 2–18 kg), and all patients achieved relief from postprandial pain and nausea. No mortality was observed during the follow-up period.

Conclusion

Laparoscopic aortomesenteric revascularization procedures for chronic mesenteric ischemia are feasible but require careful patient selection. These procedures should only be performed at referral centers by vascular surgeons with prior experience in laparoscopic vascular surgery.

Adhesion reformation and the limited translational value of experiments with adhesion barriers: A systematic review and meta-analysis of animal models

Today, 40-66% of elective procedures in general surgery are reoperations. During reoperations, the need for adhesiolysis results in increased operative time and a more complicated convalescence. In pre-clinical evaluation, adhesion barriers are tested for their efficacy in preventing 'de novo' adhesion formation, However, it is unknown to which extent barriers are tested for prevention of adhesion reformation. The aim of this systematic review and meta-analysis is to assess the efficacy of commercially available adhesion barriers and laparoscopic adhesiolysis in preventing adhesion reformation in animal models. Pubmed and EMBASE were searched for studies which assessed peritoneal adhesion reformation after a standardized peritoneal injury (in the absence of an intra-peritoneal mesh), and reported the incidence of adhesions, or an adhesion score as outcome. Ninety-three studies were included. No study met the criteria for low risk of bias. None of the commercially available adhesion barriers significantly reduced the incidence of adhesion reformation. Three commercially available adhesion barriers reduced the adhesion score of reformed adhesions, namely Seprafilm (SMD 1.38[95% CI]; p < 0.01), PEG (SMD 2.08[95% CI]; p < 0.01) and Icodextrin (SMD 1.85[95% CI]; p < 0.01). There was no difference between laparoscopic or open adhesiolysis with regard to the incidence of adhesion reformation (RR 1.14[95% CI]; p ≥ 0.05) or the adhesion score (SMD 0.92[95% CI]; p ≥ 0.05). Neither currently commercially available adhesion barriers, nor laparoscopic adhesiolysis without using an adhesion barrier, reduces the incidence of adhesion reformation in animal models. The methodological quality of animal studies is poor.

Left liver anatomical resection via the left vertical groove and intraoperative antegrade cholangioscopy in patients with left-sided hepatolithiasis and previous biliary tract surgery

Objective

This study aimed to assess the safety and efficacy of left liver anatomical resection via the left vertical groove following intraoperative antegrade cholangioscopy (biliary exploration through the left hepatic duct orifice) in patients with left-sided hepatolithiasis (LSH) and previous biliary tract surgery.

Methods

Between January 2012 and January 2016, eligible patients with LSH (n = 28) who underwent left liver anatomical resection via the left vertical groove followed by intraoperative antegrade cholangioscopy, were referred to our hospital. Clinical results, such as the overall operative time, length of hospital stay, intraoperative complications, residual stones and postoperative bile leaks, were recorded and analyzed.

Results

No residual stones and bile leakage occurred in the patients. No patients experienced intraoperative complications or T-tube placement. The mean operative time was 135.1 ± 18.9 minutes. The mean postoperative duration of hospitalization was 7.8 ± 1.8 days.

Conclusions

Left liver anatomical resection via the left vertical groove combined with intraoperative antegrade cholangioscopy is a safe and useful method for patients with LSH and previous biliary tract surgery. This technique simplifies the operative procedure by avoiding dissection of the porta hepatis and subsequent choledochotomy.

A longitudinal study of adolescent dysmenorrhoea into adulthood

Dysmenorrhoea is the most common gynaecological symptom in adolescents. Secondary dysmenorrhoea is mostly due to endometriosis. There are no known follow-up studies of dysmenorrhoea into adulthood. Cases of endometriosis often have a long history of dysmenorrhea; however, studies to date have been retrospective. This longitudinal cohort study aimed at analysing the long-term outcomes of dysmenorrhoea and associated rate of endometriosis identified in this cohort. Participants of a study of adolescents seen for dysmenorrhoea were followed-up at an average of 10.24 years. Of those contactable (74), 70 (94.6%) were included. As adults, 19 (27.1%) had slight or no pain with menstruation. Increased age of menarche was found to be associated with no menstrual pain in adulthood (OR 2.10, p = 0.034). No adolescent characteristic studied was found to be associated with severe or very severe dysmenorrhoea as an adult. At follow-up, 13 young women (18.6%) had been diagnosed with endometriosis. All cases of endometriosis were mild. The use of the oral contraceptive pill as an adolescent and feeling an improvement in symptoms with treatment as an adolescent were found to be associated with a diagnosis of endometriosis.Conclusion: These findings are important for counselling adolescents regarding this common presentation. What is Known: •Dysmenorrhoea is the most common gynaecological complaint for adolescents What is New: •Dysmenorrhoea from adolescence resolves in 1 in 4 of young women and no adolescent characteristics predict severe or very severe pain with menstruation in adults. •Only 1 in 5 of women were found to have endometriosis (all mild disease), despite a mean of 10 years of preceding dysmenorrhoea.

Cost-effectiveness of the prevention of adhesions and adhesive small bowel obstruction after colorectal surgery with adhesion barriers: a modelling study

Background

Adhesion barriers have proven to reduce adhesion-related complications in colorectal surgery. However, barriers are seldom applied. The aim of this study was to determine the cost-effectiveness of adhesion barriers in colorectal surgery.

Methods

A decision-tree model was developed to compare cost-effectiveness of no adhesion barrier with the use of an adhesion barrier in open and laparoscopic surgery. Outcomes were incidence of clinical consequences of adhesions, direct healthcare costs, and incremental cost-effectiveness ratio per adhesion prevented. Deterministic and probabilistic sensitivity analyses were performed.

Results

Adhesion barriers reduce adhesion incidence and incidence of adhesive small bowel obstruction in open and laparoscopic surgery. Adhesion barriers in open surgery reduce costs compared to no adhesion barrier ($4376 versus $4482). Using an adhesion barrier in laparoscopic procedures increases costs by $162 ($4482 versus $4320). The ICER in the laparoscopic cohort was $123. Probabilistic sensitivity analysis showed 66% and 41% probabilities of an adhesion barrier reducing costs for open and laparoscopic colorectal surgery, respectively.

Conclusion

The use of adhesion barriers in open colorectal surgery is cost-effective in preventing adhesion-related problems. In laparoscopic colorectal surgery, an adhesion barrier is effective at low costs.

The Small Bowel Cancer Incidence Enigma

Although the small bowel is a vast organ with a highly proliferative epithelium, the incidence of small bowel cancers is surprisingly low. Many factors could be involved in this unexpected cancer incidence, including difficult access to the exploration of the small bowel mucosa, which might lead to missed diagnoses of non-obstructive and non-bleeding small tumours. Moreover, possible factors that influence the low incidence include more efficient machinery of DNA replication and DNA repair enzymes, peculiarities in microbiota components, competence of the immune system, and the speed of intestinal transit. Importantly, the answer for the enigmatic risk of driver mutations caused by replication errors may be hidden in the small bowel, which is an obscure part of digestive tract that is usually inaccessible by endoscopic or colonoscopic conventional investigations. These observations warrant the necessity of an urgent exploration of small bowel features, including the evaluation of DNA replication controls and expression of DNA repair genes, in order to shed light on these obscure events.

Gynaecology problems in puberty

With the onset of puberty a range of problems may be encountered by the young girl. Some of these include a range of gynaecological issues relating to delayed onset of puberty, delayed menarche, atypical pubertal changes and the identification of anomalies of the genital tract. The distinction between physiological events and pathological problems is important to avoid unnecessary distress and anxiety. The onset of cyclic hormonal changes also provokes a number of "non-gynaecological" problems - where the link to cyclic hormonal events is often overlooked and an important opportunity to potentially intervene and assist is missed. From a global perspective there are a range of problems that are particularly encountered with the onset of puberty including the risks of sexual violence, which in the setting of having achieved the age of reproductive potential result in unplanned pregnancies, unsafe abortions and adolescent pregnancy all of which pose life threatening risks. Sex education in its broadest sense is important for all young people. Access to contraception for adolescents is vital, such that clinicians across all streams of health care who are involved in the care of young people should take the opportunity to educate and provide this care.

Duodenocolostomy as Treatment of Ileus in Short Bowel Syndrome: A Case Report

Patient: Male, 68

Final Diagnosis: Short bowel syndrome • small bowel obstruction

Symptoms: Inablility to sustain oral nutrition

Medication: —

Clinical Procedure: Duodenocolostomy

Specialty: Surgery

Bologna guidelines for diagnosis and management of adhesive small bowel obstruction (ASBO): 2017 update of the evidence-based guidelines from the world society of emergency surgery ASBO working group

Background

Adhesive small bowel obstruction (ASBO) is a common surgical emergency, causing high morbidity and even some mortality. The adhesions causing such bowel obstructions are typically the footprints of previous abdominal surgical procedures. The present paper presents a revised version of the Bologna guidelines to evidence-based diagnosis and treatment of ASBO. The working group has added paragraphs on prevention of ASBO and special patient groups.

Methods

The guideline was written under the auspices of the World Society of Emergency Surgery by the ASBO working group. A systematic literature search was performed prior to the update of the guidelines to identify relevant new papers on epidemiology, diagnosis, and treatment of ASBO. Literature was critically appraised according to an evidence-based guideline development method. Final recommendations were approved by the workgroup, taking into account the level of evidence of the conclusion.

Recommendations

Adhesion formation might be reduced by minimally invasive surgical techniques and the use of adhesion barriers. Non-operative treatment is effective in most patients with ASBO. Contraindications for non-operative treatment include peritonitis, strangulation, and ischemia. When the adhesive etiology of obstruction is unsure, or when contraindications for non-operative management might be present, CT is the diagnostic technique of choice. The principles of non-operative treatment are nil per os, naso-gastric, or long-tube decompression, and intravenous supplementation with fluids and electrolytes. When operative treatment is required, a laparoscopic approach may be beneficial for selected cases of simple ASBO.Younger patients have a higher lifetime risk for recurrent ASBO and might therefore benefit from application of adhesion barriers as both primary and secondary prevention.

Discussion

This guideline presents recommendations that can be used by surgeons who treat patients with ASBO. Scientific evidence for some aspects of ASBO management is scarce, in particular aspects relating to special patient groups. Results of a randomized trial of laparoscopic versus open surgery for ASBO are awaited.

Decreasing recurrent bowel obstructions, improving quality of life with physiotherapy: Controlled study

AIM

To compare (1) quality of life and (2) rate of recurrent small bowel obstructions (SBO) for patients treated with novel manual physiotherapy vs no treatment.

METHODS

One hundred and three subjects (age 19-89) with a history of recurrent adhesive SBO were treated with a manual physiotherapy called the Clear Passage Approach (CPA) which focused on decreasing adhesive crosslinking in abdominopelvic viscera. Pre- and post-therapy data measured recurring obstructions and quality of life, using a validated test sent 90 d after therapy. Results were compared to 136 untreated control subjects who underwent the same measurements for subjects who did not receive any therapy, which is the normal course for patients with recurring SBO. Comparison of the groups allowed us to assess changes when the physiotherapy was added as an adjunct treatment for patients with recurring SBO.

RESULTS

Despite histories of more prior hospitalizations, obstructions, surgeries, and years impacted by bowel issues, the 103 CPA-treated subjects reported a significantly lower rate of repeat SBO than 136 untreated controls (total obstructions P = 0.0003; partial obstructions P = 0.0076). Subjects treated with the therapy demonstrated significant improvements in five of six total domains in the validated Small Bowel Obstruction Questionnaire (SBO-Q). Domains of diet, pain, gastrointestinal symptoms, quality of life (QOL) and pain severity when compared to post CPA treatment were significantly improved (P < 0.0001). The medication domain was not changed in the CPA treated group (P = 0.176).

CONCLUSION

CPA physical therapy was effective for patients with adhesive SBO with significantly lower recurrence rate, improvement in reported symptoms and overall quality of life of subjects.

Biliary exploration via the left hepatic duct orifice versus the common bile duct in left-sided hepatolithiasis patients with a history of biliary tract surgery: A randomized controlled trial

BACKGROUND

Hepatectomy and additional common bile duct exploration are required for the treatment of left-sided hepatolithiasis (LSH).

METHODS

Eligible LSH patients (n = 62) scheduled for open left lateral segmentectomy or left hemihepatectomy with intraoperative biliary exploration via the left hepatic duct orifice (LHD group, n = 35) or the common bile duct (CBD group, n = 27) were retrospectively studied. T-tube insertion was performed on selected patients. Primary outcome measures included overall operative time, length of hospital stay, intraoperative complications, residual stones, and postoperative bile leaks.

RESULTS

There were no residual stones observed in the 2 groups. Ten patients in the CBD group received T-tube placement, whereas no patients in the LHD group received T-tube placement. There were more patients in the CBD group suffered intraoperative complications and postoperative bile leakage than LHD group (P < .05). The LHD group had a significantly shorter operative time and hospitalization than the CBD group (P < .05).

CONCLUSION

For left-sided hepatolithiasis patients with a history of biliary tract surgery, LHD cholangioscopy is an accessible technique that simplifies the operation procedure by avoiding choledochotomy and subsequent T-tube insertion, which results in lower complication rates as well as shorter operative duration and length of hospitalization.

Acute appendicitis: should the laparoscopic approach be proposed as the gold standard? Six-year experience in an Emergency Surgery Unit

Acute appendicitis is common in an Emergency Surgery Unit. Although the laparoscopic approach is a method accepted for its treatment, no strong data are available for determining how many procedures must an experienced surgeon carry out for obtaining all the advantages of this technique and if this approach can become the gold standard in the activity of a general emergency unit with senior surgeons variously skilled on the basic laparoscopy. 142 patients that underwent appendectomy (90 laparoscopic, 52 conventional) for acute appendicitis were enrolled in this institutional retrospective cohort study. The surgeons were classified with a descriptor-based grading and divided in two groups regarding the skill. The only relevant result of our study was the significant reduction of conversion rate in case of laparoscopic approach. No strong differences were found concerning the duration of the procedure and the hospital stay between the two groups. The rate of complications were very low in both groups. In conclusion, the experienced surgeons can easily perform a laparoscopic approach independently from the specific skill in this approach.