2017 update of the WSES guidelines for emergency repair of complicated abdominal wall hernias

Emergency inguinal hernia surgery: A proposed update to the clinical guidelines algorithm

INTRODUCTION

Management strategies for acute irreducible hernias vary, with recent debates on the role of manual reduction versus immediate surgery. This study aimed to identify preoperative risk factors for bowel resection in acute irreducible inguinal hernias.

METHODS

A retrospective cohort study included patients from 2 university hospitals who underwent emergency surgery for acute irreducible hernias between January 2010 and December 2018.

RESULTS

Out of a total of 652 patients, 15% required intestinal resection; females, older individuals, and those with comorbidities were more likely to undergo resection. Multivariate analysis identified patients with femoral hernia (OR 2.272; 95%CI 1.275-4.047; P = .005) and preoperative intestinal obstruction (OR 8.071; 95%CI 4.331-15.043; P < .001). Patients needing resection experienced higher postoperative complication rates and longer hospital stays.

DISCUSSION

Femoral hernia and preoperative intestinal obstruction were independent predictors of bowel resection in acute irreducible hernias. Incorporating these factors into decision-making algorithms may improve patient outcomes and optimize surgical management.

The safety of polypropylene mesh in repairing incarcerated or strangulated hernias with organ resection

BACKGROUND

Organ resection is often required in incarcerated or strangulated hernias, which makes the surgical field more contaminated, and increased contamination makes it possible to elevate the risk of surgical site infections and increase the likelihood of hernia recurrence. The safety of polypropylene mesh for repair in such contaminated conditions is equivocal, leading to controversy concerning its application. This study aims to elucidate this matter by comparing the complications between mesh repair and primary repair specifically in strangulated or incarcerated hernias with organ resection. At the same time, the study contributed to assessing the safety of polypropylene mesh in repairing hernias under conditions where infection is a significant concern.

METHODS

This meta-analysis was reported following PRISMA 2020 guidelines, all studies were searched and retrieved from major databases (PubMed, and Web of Science), and were included if they reported complications between mesh repair and primary repair in incarcerated or strangulated ventral or groin hernias with or without organ resection. Meta-analyses were conducted when possible, and subgroup analyses were made for the severity of complications (major vs minor) and hernia type (ventral vs. groin). According to the study design, the risk of bias was assessed using the Newcastle-Ottawa Scale. All related articles and reference lists in these original studies were also obtained from the above databases.

RESULTS

Nine observational studies containing 1287 patients with incarcerated or strangulated hernias were included. Three findings were found: (1) Overall complications in the mesh repair group were more than those in the primary repair group in incarcerated or strangulated hernias with organ resection (OR = 4.93; 95% CI: 2.54, 9.56; P < 0.00001). (2) There was a slight tendency for more complications to occur in the organ resection group than in the non-resection group with mesh repair, although the difference was subtle (OR = 3.36; 95% CI: 0.86, 13.15; P = 0.08). (3) There was a trend that more complications occurred when mesh was used in emergent ventral hernia repair than in primary repair (OR = 3.33; 95% CI: 0.91, 12.26; P = 0.07), while, this trend was not observed in emergent groin hernia repair.

CONCLUSION

In cases of incarcerated or strangulated hernias requiring organ resection, the use of polypropylene mesh has been correlated with a higher incidence of complications compared to primary repair. Additionally, a trend was observed toward greater complication rates when ventral hernia repair was performed. Therefore, polypropylene mesh should be used cautiously in strangulated hernias with organ resection or in the repair of the ventral hernia.

Minimally invasive surgery for acute groin hernias: A systematic review and meta-analysis

BACKGROUND

An open approach is widely used for the surgical treatment of acute groin hernia, however, in recent decades multiple studies have explored the safety and benefits of minimally invasive surgery (MIS) for acute groin hernia.

METHODS

A systematic literature search was performed on the electronic databases and meta-analysis was performed using the RevMan 5.4.1.

RESULTS

Our study identified that the MIS for acute groin hernia is associated with significantly lower rate of bowel resection with better outcomes than an open approach. Similarly, superficial surgical site infections (SSI) and length of stay (LOS) were also significantly lower in the MIS group. However, there was no significant difference in the duration of operation, use of prosthesis, overall postoperative morbidity, incidence of seroma, hematoma, deep SSI, and hernia recurrence between the two treatment approaches.

CONCLUSION

MIS for acute groin hernia is associated with better outcomes than the open approach in terms of outcomes like the bowel resection rate, superficial SSI, and LOS.

Minimally invasive approach in emergency for the treatment of acute incarcerated/strangulated ventral hernias. A systematic review and meta-analysis

BACKGROUND

This study aims to report the currently available evidence on minimally invasive surgery (MIS) in emergency settings for treating acute incarcerated/strangulated ventral, primary, or incisional hernias and compare it with the open approach.

METHODS

A systematic review was conducted according to the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) statement.

RESULTS

Six articles were included. Results of the meta-analysis based on 1720 patients and two articles show that the mean operative time was shorter in the open repair group compared to the MIS group (mean difference [MD], 39.53 min; p < 0.0002). Overall, 116 (13.6%) and 181 (20.9%) postoperative complications were observed after MIS and open repair, respectively (relative risk [RR], 0.65; p = 0.61). MIS was associated with a statistically significantly lower wound complication rate than the open approach (RR, 0.43; p = 0.50). The two approaches showed equivalent results regarding return to the operative room (RR, 0.61; p = 0.13). The mean hospital stay in the MIS group was shorter than the open group (MD, -0.68; p = 0.99).

CONCLUSIONS

MIS in emergency settings seems feasible for treating acute incarcerated ventral hernias. However, due to the limitations of the included studies, the obtained evidence should be analyzed with caution. Further prospective studies are required to draw definitive conclusions.

Complicated Inguinocrural Hernias: Laparoscopic Vs. Open Surgery in the Emergency Setting

Introduction

The feasibility of laparoscopic treatment for inguinocrural-hernias (ICH) and its advantages over open techniques have already been demonstrated. Nonetheless, there is still no sufficient literature regarding laparoscopy for incarcerated or strangulated ICH in the emergency setting. Our primary outcome was to evaluate the feasibility and safety of laparoscopic surgery (LS) for complicated ICH by comparing outcomes to open surgery (OS).

Methods

A comparative retrospective study with prospective case registry was conducted. All patients who underwent ICH repair due to complicated hernias from January 2003 to December 2023 were analyzed and divided into groups according to the approach during surgery: OS (by Lichtenstein technique) or LS (by transabdominal preperitoneal approach). Demographic variables, hernia size and type, surgical time, length of stay, recurrence and other morbidities were compared between groups.

Results

A total of 8282 ICH were operated in the studied period, out of which 162 were included in the study due to incarceration or strangulation. Of these, 83 were treated by OS, while 79 underwent LS. LS showed a reduction in surgical time (70 min IQR60-103 vs. 117 min IQR100-120; p 0.03), length of stay (1.9 days ± 1.4 vs. 2.9 days ± 3.1; p 0.01) and total morbidities (6.3% vs, 16.8%; p 0.04), with a similar recurrence rate (1.2% vs. 1.2%; p1) when compared to OS group.

Conclusion

Laparoscopic surgery for the treatment of complicated inguinocrural-hernias is a feasible and safe approach. It allows the benefits of minimally invasive surgery, including shorter surgical time, shorter length of stay and fewer postoperative morbidities, without increasing recurrence rate compared to open surgery.

Straining induced spontaneous bowel transection in a patient with incarcerated inguinal hernia with cryptorchidism: A case report

INTRODUCTION

The pooled prevalence of inguinal hernia worldwide is reported as 7.7 %. Out of all inguinal hernia cases, 10 % of cases get incarcerated whereas strangulation occurs in 0.29 % to 2.9 % of cases. The mortality rate of strangulated inguinal hernia is 2.6 % to 9 %. Although cough-induced spontaneous bowel transection in incarcerated inguinal hernia has been reported, straining induced spontaneous bowel transection has never been reported in the literature.

CASE REPORT

40 year male presented with irreducible swelling in right inguinoscrotal region, vomiting and unable to pass stool/flatus for 4 days. On examination, there was irreducible swelling at right inguinoscrotal region, separately palpable left testis and non-palpable right testis with signs of peritonitis. On inguinoscrotal exploration, the hernial sac contained 10 ml of toxic fluid with a viable but spontaneously transected ileal loop. So, hand-sewn ileoileal anastomosis with darning repair with right orchidectomy was done.

DISCUSSION

An intraluminal pressure of 150-260 mm of Hg is required for bowel transection. In incarcerated hernia, bowel loops are edematous, and repeated episodes of straining during defecation can lead to an elevation of intraluminal pressure up to 230 mm of Hg, which is enough to cause transection of the edematous bowel.

CONCLUSION

In incarcerated hernia, since the bowels are edematous, even repeated episodes of coughing or straining can cause bowel transection. Untreated undescended testis is at higher risk of developing malignancy after 10 years of age. Similarly, restoration of fertility is not seen even on orchidopexy. So, orchidectomy is recommended in adult.

A case of spontaneous reduction of incarcerated inguinal hernia caused by Meckel's diverticulum

Inguinal hernias with a Meckel's diverticulum are called Littre hernias and are rare diseases. In many cases, symptoms of incarceration or intestinal obstruction are present, and emergency surgery is generally required. However, imaging diagnosis and clinical symptoms are similar to those of incarceration of inguinal hernias, making preoperative diagnosis difficult. In most cases, diagnosis is made during emergency surgery. A 54-year-old man with abdominal pain was found to have a right-sided incarcerated inguinal hernia on abdominal computed tomography. The incarceration spontaneously reduced, although a Meckel's diverticulum was discovered during emergency laparoscopic surgery for an inguinal hernia. Mesh repair and Meckel diverticulotomy were performed. In cases of inguinal hernias due to a Meckel's diverticulum, it is difficult to diagnose a Meckel's diverticulum as the cause without exploring the intestine, although laparoscopic hernia repair is useful to investigate this possibility.

Incarcerated peri-inguinal hernia containing the appendix: a case report

Primary ventral hernia (PVH) is a main differential diagnosis of abdominal wall masses and typically occurs at areas of structural weakness, such as the linea alba. This report draws attention to atypical PVHs of the peri-inguinal region, an underdiagnosed subgroup of defects located adjacent to the inguinal canal and below the semilunar line. The absence of a standardized definition or classification complicates the diagnosis of this infrequent pathology. We present a case of a patient with a tender abdominal wall mass, initially interpreted as superinfected hematoma. Despite drainage, the patient's physical condition continued to deteriorate. Repeat imaging eventually revealed acute appendicitis inside a peri-inguinal hernia. Laparoscopic appendectomy was performed, and the abscess cavity was incised, debrided and left open, which led to successful secondary closure of the wound. This case highlights the need for greater awareness of atypical hernias and their potential complications to enable timely detection and adequate treatment.

Synthetic vs. biologic mesh for abdominal wall reconstruction in contaminated surgical fields. A meta-analysis of randomized controlled trials and observational studies

PURPOSE

Biologic meshes had been the first choice for abdominal wall reconstruction (AWR) in contaminated surgical fields. However, due to increased cost and questioned effectiveness, synthetic meshes have been also implemented. The aim of the present meta-analysis was to compare synthetic and biologic mesh in terms of recurrence and postoperative outcomes.

METHODS

The present meta-analysis was designed using the PRISMA guidelines. A search in Medline, Scopus, EMBASE, Clinicaltrials.gov, Google Scholar and Cochrane CENTRAL was conducted from inception until September 2024. Randomized clinical trials (RCTs) and observational studies which compared the use of biologic and synthetic mesh for AWR in contaminated surgical fields were included. Data were extracted by two experienced researchers in pre-defined electronic forms. Pooled odds ratios (OR) and mean differences (MD) were calculated using a random-effects model. Included RCTs were assessed using the Risk of Bias 2 (RoB2) tool and non-randomized trials with the Risk of Bias in non-Randomized Trials (RoBINS-I) tool.

RESULTS

Overall 11 studies were included which enrolled 1,945 patients. Subgroup analysis of RCTs indicated significantly lower recurrence rates for synthetic compared to biologic mesh (p < 0.0001) with a similar follow-up (p = 0.07). Nevertheless, no difference was demonstrated in surgical site infection (SSI) rates. Although synthetic mesh was associated with shorter length of stay, the other postoperative outcomes (surgical site occurrences, mesh infections, readmissions, reoperations) were similar among the two groups.

CONCLUSION

Synthetic mesh should be considered as a safe and effective option for abdominal wall reconstruction in contaminated surgical fields compared to biologic mesh. Nevertheless, future research is expected to investigate cost-effectiveness of biosynthetic meshes, as alternative option in such surgical fields.

Incidence and Outcomes of Emergency Presentation With Complicated Abdominal Wall Hernias: A Retrospective Study

Aims This study aims to analyse the type of repair and post-op outcomes for individuals who underwent surgical intervention and presented with symptomatic abdominal wall hernia as an emergency. It highlights the importance of timely elective hernia management in lowering emergency presentations and any related complications. Background Abdominal wall hernias are common surgical conditions that can present electively or as emergencies, with emergency cases being associated with higher complication rates. In recent years, there has been an increase in emergency hernia presentations, leading to a greater number of urgent surgeries. These emergency operations have been linked to higher rates of post-op complications and re-interventions due to factors like bowel obstruction, strangulation, and delayed intervention. Therefore, research and analysis of post-op outcomes are essential to highlight the potential role of elective hernia management in reducing the burden of emergency cases. Methods This study was a single-institution retrospective study that looked at patient data over a 10-year period and involved patients who presented with abdominal wall hernias on an emergency basis and underwent surgical repair. Data were collected on patient demographics, presenting symptoms, hernia type, surgical technique, use of mesh reinforcement, post-op complications, re-intervention rates, and length of hospital stay. The database was developed and analysed with IBM SPSS Statistics for Windows, Version 26 (Released 2019; IBM Corp., Armonk, NY, USA), and the results were considered significant at p<0.005. Results Over a 10-year period, 239 patients presented with emergency abdominal wall hernias, with 238 undergoing surgical repair; one patient died before surgery. Most repairs were performed using an open approach (93%, n=221), while 7% (n=17) were laparoscopic. Primary repair was conducted in 47% of cases (n=111), and mesh reinforcement was used in 53% (n=127). The overall recurrence rate was low (2%, n=4), with higher recurrence observed only in primary repairs. Mesh repairs had a higher incidence of post-op complications (56%, n=37) compared to primary repairs (44%, n=29). Patients who underwent mesh repair had an average hospital stay of eight days compared to those with primary repair (nine days). Inguinal, umbilical, and femoral hernias were the most common types observed, accounting for over 76% of cases. In total, 6% of patients (n=15) required bowel resections, highlighting the complexity of these cases. Most patients (72%, n=172) experienced no complications, but some of the most common post-op complications were wound dehiscence (7%, n=17), post-op collection (7%, n=16), delayed recovery (3%, n=8), and recurrence (2%, n=4). Conclusion It has been observed that a greater number of post-op complications and longer hospital stays are linked to emergency hernia procedures, especially when mesh repair is utilised. Although the recurrence rate of mesh repairs is lower than that of primary repair, the increased risk of complications highlights the significance of cautious surgical planning and patient selection. In conclusion, this study highlights the benefits of elective hernia management in reducing emergency presentations and the unfavourable consequences that may arise from it. These results support the importance of pre-op optimisation, especially for high-risk patients, and add to the debate on the best surgical techniques.

Simultaneous incisional hernia repair and colorectal surgery: one or two-step procedure?

PURPOSE

Patients requiring colorectal surgery in the context of an incisional hernia are common, but it is not clear whether the repair should be performed as a single or two-step surgery. Our aim was to evaluate complications after concomitant abdominal wall repair and colorectal surgery compared to those after incisional hernia repair alone.

METHODS

Adult patients who underwent elective incisional hernia surgery from 2012-2022 from the EVEREG registry were included. Patients who underwent midline incisional hernia repair as a single procedure and patients who underwent midline incisional hernia repair concomitant with colorectal surgery were included. The primary outcome was surgical site infection (SSI). The secondary outcomes were the Clavien-Dindo classification grade, in-hospital mortality and recurrence.

RESULTS

A total of 7783 patients were included: 256(3.3%) who underwent concomitant surgery and 7527(96.7%) who underwent only midline incisional hernia repair. The first group included more comorbid patients and complex hernias. SSI was found in 55.4% of patients who underwent simultaneous surgery compared to 30.7% of patients who underwent hernia repair alone (P = 0.000). Multivariate analysis revealed that the risk factors for SSI were BMI (OR = 1.07, 95% CI 1.02-1.11; P = 0.004), smoking (OR = 1.89, 95% CI 1.12-3.19; P = 0.017), transverse diameter (OR = 1.06, 95% CI 1.01-1.11; P = 0.017), component separation (OR = 1.996, 95% CI 1.25-3.08; P = 0.037) and clean-contaminated and contaminated surgeries(OR = 3.86, 95% CI 1.36-10.66; P = 0.009). Higher grades of Clavien-Dindo (P = 0.001) and mortality rates (P < 0.001) were found in the colorectal surgery group, although specific risk factors were detected. No differences were observed in terms of recurrence (P = 0.104).

CONCLUSIONS

Concomitant surgery is related to greater risk of complications, especially in patients with comorbidities and complex hernias. In properly selected cases, simultaneous procedures can yield satisfactory results.

Surgical practices in emergency umbilical hernia repair and implications for trial design

INTRODUCTION

There is variation in the investigation, management, and surgical technique of acutely symptomatic umbilical hernias and optimal strategies remain to be established. This survey aimed to identify key variables influencing decision-making and preferred surgical techniques in emergency umbilical hernia care to help inform trial design and understand potential challenges to trial delivery.

METHODS

A survey was distributed to surgeons through social media, personal contacts, and ASGBI lists. It comprised five sections: (i) performer of repair, (ii) repair preferences, (iii) important outcomes, (iv) perioperative antibiotic use, and (v) potential future trial design.

RESULTS

There were 105 respondents, of which 49 (46.6%) were consultants. The median largest defect surgeons would attempt to repair with sutures alone was 2 cm (IQR 2-4 cm). In the acute setting, the most common mesh preferences are preperitoneal plane placement (n = 61, 58.1%), with synthetic non-absorbable mesh (n = 72, 68.6%), in clean (n = 41, 39.0%) or clean-contaminated (n = 52, 49.5%) wounds. Respondents believed suture repair to be associated with better short-term outcomes, and mesh repair with better long-term outcomes. Pre-/intra-operative antibiotics were very frequently given (n = 48, 45.7%) whilst post-operative antibiotics were rarely (n = 41, 39%) or very rarely (n = 28, 26.7%) given. The trial design felt to most likely influence practice is comparing mesh and suture repair, and post-operative antibiotics versus no post-operative antibiotics. Respondents indicated that to change their practice, the median difference in surgical site infection rate and recurrence rate would both need to be 5%.

CONCLUSION

This survey provides insight into surgical preferences in emergency umbilical hernia management, offering guidance for the design of future trials.

Case Report: Abdominal Wall Abscess as First Clinical Sign of Jejunal Perforation After Blunt Abdominal Trauma

Aim

To discuss extended retrorectal abscess secondary to blunt abdominal trauma as a cause of abdominal wall (AW) infection and impairment.

Methods

According to the CARE checklist, we describe a rare case of blunt abdominal trauma with late diagnosis of jejunal perforation with an abscess that extensively dissected the retromuscular space.

Results

A 65 years-old female patient experienced multiple traumas after a traffic collision. Ten days after admission, the patient presented with swelling in the right abdomen. CT scan showed localised pneumoperitoneum and extensive collection affecting the right retrorectal space, reaching the ribs and preperitoneal space. Urgent laparotomy was performed and jejunal perforation with biliary peritonitis and extraperitoneal extension with dissection of the right retrorectal space were found. Intestinal resection with anastomosis was then performed. Exhaustive lavage of the cavity and retromuscular space with debridement of the necrotic posterior rectus lamina was required. Retrorectal drainage was placed. Primary closure of the aponeurosis was achieved using a small-bites technique with a slowly absorbable monofilament suture. Due to the weakness of the abdominal wall, an absorbable biosynthetic mesh impregnated with gentamicin was placed onlay. Negative pressure therapy was applied to the closed wound. Patient received antibiotics and CTs showed favourable evolution. No infectious complications or incisional hernia were reported after 12 months of follow-up.

Conclusion

No cases of blunt trauma causing extensive AW infection have been reported in the literature. Whilst rare, this should be considered in traumatic patients. Our experience shows that they can be managed with surgical drainage and absorbable meshes can be considered in cases of fascial loss.

The importance of predictive markers in incarcerated abdominal wall hernia

PURPOSE

Emergency abdominal wall hernia repairs play a significant role in general surgical emergencies. In such cases, the time taken to decide on surgery is crucial, as the situation may progress to necrosis, perforation, and organ resection due to strangulation following incarceration. To facilitate the early detection of this condition, studies have been conducted on various predictive markers, most of which are related to similar markers used in acute mesenteric ischemia. This study aims to assess the predictive significance of preoperative laboratory and imaging findings in incarcerated abdominal wall hernia with strangulation.

METHODS

Retrospectively, 122 patients who underwent emergency surgery for incarcerated abdominal wall hernias with a preoperative diagnosis between January 1, 2018, and September 1, 2023, at the General Surgery Clinic of Samsun University Education and Research Hospital were included in the study. According to the examination of the operation notes, Group I was designated for patients who underwent bowel resection, Group II for those who underwent omental resection, and Group III for those without resection. The study investigated the association between patients 'age, gender, hernia type and side, preoperative laboratory parameters (pH, Base Excess (BE), Lactate, White Blood Cell Count (WBC), Neutrophil (N), Lymphocyte (L), Monocyte (M), Platelet (P), C-Reactive Protein (CRP), and pH/BE, pH/Lactate, Lactate/BE, N/L, N/M, L/M, N/CRP, M/P, P/CRP ratios), physical examination (PE), and imaging findings among the resection groups.

RESULTS

Out of the 122 patients operated with a preliminary diagnosis of acute incarcerated abdominal wall hernia, 68 were female, 34 were male, and the median age was found to be 67.16 (30-99). In the conducted statistical analysis, mean values of Lactate (p = 0.007), WBC (White Blood Cell) (p = 0.001), Neutrophil (p < 0.001), and NLR (Neutrophil-to-Lymphocyte Ratio) (p = 0.003) were significantly different based on resection groups. Subsequent pairwise comparisons indicated that these differences were attributed to variations in mean values of Lactate, WBC, Neutrophil, and NLR between the Bowel Resection and Resectionless groups. Mean values of Monocytes were also significantly different among resection groups (p = 0.049), and pairwise comparisons revealed that this difference was due to variations in mean values of Monocytes between the Omental Resection and Resectionless groups. The cut-off values were determined as follows in the ROC analysis: 1.2 mmol/L for Lactate, 18.5 (10^9/L) for WBC, 8.1 (10^9/L) for Neutrophil and 10 mg/L for CRP concerning bowel resection.

CONCLUSION

In cases of abdominal wall hernia operations due to incarceration, bowel and/or intra-abdominal organ resections related to strangulation can lead to significant morbidity and mortality. Beyond the imaging methods available for preoperative assessment, high levels of laboratory parameters, including Lactate, WBC, Neutrophil, and NLR ratio, may primarily indicate the need for bowel resection, considering that omental resection is associated with lower morbidity and mortality compared to bowel resection, elevated levels of monocytes may primarily indicate the requirement for omental resection in emergency abdominal wall hernia surgery. We recommend that this be prioritized in emergency surgery to prevent complications such as bowel perforation and sepsis and improve clinical outcomes. The surgeon is advised to keep this in mind.

Transabdominal preperitoneal (TAPP) repair for emergency groin hernia: a systematic review

PURPOSE

Laparoscopic groin hernia repair has evolved and gained popularity and laparoscopic transabdominal preperitoneal (TAPP) procedure provides an opportunity to evaluate the peritoneal cavity and both inguinal areas without the need for additional dissection. There is still a paucity of evidence to support TAPP repair in the emergency setting. In this systematic review, we aim to evaluate the feasibility and safety of TAPP repair for incarcerated and strangulated groin hernias.

METHODS

PRISMA guidelines were followed for literature search and established inclusion and exclusion criteria were applied. Data were extracted and analyzed for the outcomes of interest.

RESULTS

Overall, 8 studies were included in the review, comprising 316 patients. Patients characteristics and outcomes were limitedly reported. Only 3 cases of conversion to open approach were reported and 2 recurrences were diagnosed. Postoperative complications are inconsistently reported but mostly refer to minor complications. There were no mortality cases. Visceral resections were performed in 25 cases due to ischemia, mostly extracorporeally.

CONCLUSION

Laparoscopy is a game changer and TAPP approach is a feasible, safe, and effective technique for the emergent repair of groin hernias. Further studies and prospective randomized data are needed to establish its role in the emergent groin hernia management.

TEP or TAPP: who, when, and how?

Groin hernia repair is the most common procedure performed by general surgeons. The open mesh technique generally represents the main technique for an inguinal repair, but a different approach is often required. Laparoscopy was found to be the answer to minimizing the impact of the preperitoneal open techniques described by Nyhus and Stoppa. The introduction of the totally extraperitoneal hernia repair (TEP) and transabdominal preperitoneal repair (TAPP) in the early 1990s started a new chapter in groin hernia surgery. The minimally invasive techniques vs. open mesh, and then one against the other, soon became a hot topic among abdominal wall surgeons. With time, the number of procedures and indications increased and are still increasing. This review aims to provide an overview of the two main laparoscopic techniques for groin hernia repair, answering the following questions: Who should perform them? What is the learning curve required to minimize complications and optimize operative time? When is a minimally invasive approach indicated, and which one (both in elective and in emergency setting)? How are they performed? The standard techniques have been described in detail, and personal observations from an abdominal wall surgery referral center were added. The main reviews from the early 2000s up to date, which compared the techniques, were analyzed, and the results reported, confirming the comparable safety and efficacy of both these techniques.

Time to symptom onset and manual reduction outcomes as predictors of bowel viability in incarcerated obturator hernias

The current study aimed to identify the indications for manual reduction in incarcerated obturator hernias (OH). Further, whether time to symptom onset and manual reduction outcomes can be predictors of bowel viability and the need for bowel resection in incarcerated OH were examined. This retrospective study included 26 patients with incarcerated OH who underwent surgery. All patients underwent manual reduction, and computed tomography scan after manual reduction confirmed hernia release. Multivariate analyses were performed to determine the predictors of bowel resection. The bowel resection group had a significantly longer average time to symptom onset than the nonbowel resection group (88 vs 36 h). Further, the bowel resection group was more likely to have failed manual reduction than the nonbowel resection group. A time to symptom onset of ≥ 72 h and failed manual reduction were significant predictors of bowel viability. Age, sex, hernia localization, American Society of Anesthesiologists physical status score, and laboratory findings did not differ significantly between the bowel resection and nonbowel resection groups. Time to symptom onset and manual reduction outcomes are significant predictors of bowel viability in incarcerated OH. Patients with a time to symptom onset of ≥ 72 h and failed manual reduction require surgical evaluation due to a high risk of bowel nonviability. Therefore, a cautious approach is required in the management of OH, and further research on optimized treatment protocols should be conducted.

Emergency umbilical hernia management: scoping review

BACKGROUND

Umbilical hernias, while frequently asymptomatic, may become acutely symptomatic, strangulated or obstructed, and require emergency treatment. Robust evidence is required for high-quality care in this field. This scoping review aims to elucidate evidence gaps regarding emergency care of umbilical hernias.

METHODS

EMBASE, MEDLINE and CENTRAL databases were searched using a predefined strategy until November 2023. Primary research studies reporting on any aspect of emergency umbilical hernia care and published in the English language were eligible for inclusion. Studies were excluded where emergency umbilical hernia care was not the primary focus and subsets of relevant data were unable to be extracted. Two independent reviewers screened abstracts and full texts, resolving disagreements by consensus or a third reviewer. Data were charted according to core concepts addressed by each study and a narrative synthesis was performed.

RESULTS

Searches generated 534 abstracts, from which 32 full texts were assessed and 14 included in the final review. This encompassed 52 042 patients undergoing emergency umbilical hernia care. Most were retrospective cohort designs (11/14), split between single (6/14) and multicentre (8/14) with only one randomized trial. Most multicentre studies were from national databases (7/8). Themes arising included risk assessment (n = 4), timing of surgery (n = 4), investigations (n = 1), repair method (n = 8, four mesh versus suture; four laparoscopic versus open) and operative outcomes (n = 11). The most commonly reported outcomes were mortality (n = 9) and morbidity (n = 7) rates and length of hospital stay (n = 5). No studies included patient-reported outcomes specific to emergency umbilical hernia repair.

CONCLUSION

This scoping review demonstrates the paucity of high-quality data for this condition. There is a need for randomized trials addressing all aspects of emergency umbilical hernia repair, with patient-reported outcomes.

Are Surgeons Going to Be Left Holding the Bag? Incisional Hernia Repair and Intra-Peritoneal Non-Absorbable Mesh Implant Complications

Ventral incisional hernias are common indications for elective repair and frequently complicated by recurrence. Surgical meshes, which may be synthetic, bio-synthetic, or biological, decrease recurrence and, resultingly, their use has become standard. While most patients are greatly benefited, mesh represents a permanently implanted foreign body. Mesh may be implanted within the intra-peritoneal, preperitoneal, retrorectus, inlay, or onlay anatomic positions. Meshes may be associated with complications that may be early or late and range from minor to severe. Long-term complications with intra-peritoneal synthetic mesh (IPSM) in apposition to the viscera are particularly at risk for adhesions and potential enteric fistula formation. The overall rate of such complications is difficult to appreciate due to poor long-term follow-up data, although it behooves surgeons to understand these risks as they are the ones who implant these devices. All surgeons need to be aware that meshes are commercial devices that are delivered into their operating room without scientific evidence of efficacy or even safety due to the unique regulatory practices that distinguish medical devices from medications. Thus, surgeons must continue to advocate for more stringent oversight and improved scientific evaluation to serve our patients properly and protect the patient-surgeon relationship as the only rationale long-term strategy to avoid ongoing complications.

Manufacture and evaluation of nano-silver-poly-DL-lactide-co-caprolactone-small intestinal submucosa biological mesh in abdominal wall reconstruction

Background

Inguinal hernia repair is a routine surgical procedure and many methods are being applied to improve the operation. In this study, an abdominal wall defect model was established in New Zealand rabbits. The safety and efficacy of the test product was evaluated by observing the physiological state and clinical manifestations and conducting anatomical observations in the rabbits after use of the nano-silver-poly-DL-lactide-co-caprolactone-small intestinal submucosa (NS-PLCL-SIS) mesh.

Methods

A total of 18 New Zealand rabbits were randomly divided into a test group and a blank group. Routine blood and serum biochemical tests, and anatomical observations were conducted on postoperative day 30 (D30), day 60 (D60), and day 90 (D90). During the study period, all animals underwent clinical observation, and the obtained data were counted.

Results

The results showed that the NS-PLCL-SIS mesh was degraded within 90 days, and there was no abnormal reaction and no animal death during the test. There was no significant difference in the changes of animal body weight at each time point. There was no infectious inflammatory reaction in the wound at the study site, and the ocular wound healed well 7 days after the operation.

Conclusions

Under the conditions of this experiment, the NS-PLCL-SIS mesh had good performance in the repair of abdominal wall defect in New Zealand rabbits and is clinically safe for veterinarians.

Management of groin hernias in emergency setting: differences in indications and outcomes between laparoscopic and open approach. A single-center retrospective experience

PURPOSE

The use of minimally invasive groin hernia repair techniques in an emergency setting is still debated and its widespread is limited. The aim of this study is to evaluate the safety and efficacy of the laparoscopic transabdominal preperitoneal (TAPP) technique in the treatment of inguinal and femoral hernias in emergency setting based on our experience, comparing indications and outcomes with the open technique.

METHODS

A retrospective analysis was performed including all patients with incarcerated and/or strangulated groin hernia who underwent emergency surgery from November 2019 to September 2022. Perioperative variables and short- and long-term outcomes were examined. Statistical analysis was performed using chi-square test for nominal variables and Student's t test for continuous ones. A p value < 0.05 was considered statistically significant.

RESULTS

Sixty-six patients were included: 29 patients were treated with TAPP technique (Tapp group) and 37 with open technique plus diagnostic laparoscopy (Open group). Patients in the TAPP group were younger, had less severe clinical scenarios, and had a trend for lower Charlson Comorbidity Index, whereas ASA score and BMI were similar. The small bowel was more frequently herniated in the open group. Bilateral hernia repair was performed in 20.69% of patients in the Tapp group versus 0% in the Open group (p = 0.004). Bowel resection was more frequent in the open group (48.65% vs 0% of the Tapp group, p < 0.001) length of surgery was comparable in the two groups. In the Tapp group, the length of hospitalization was significantly shorter (2.59 ± 2.28 days vs. 9.08 ± 14.48 days; p = 0.023). Postoperative complications, according to Clavien-Dindo, were more severe in Open group where there were two deaths. There were no differences in the number of readmission and re-operations at 30 days and in the recurrence rate.

CONCLUSIONS

Emergency repair of inguinal and femoral hernias using TAPP is a valuable option, safe and feasible in selected patients. In this series, indications for TAPP were reserved to younger patients with less comorbidities and less severe clinical scenario. Future randomized studies are needed to compare TAPP with open emergency hernia surgery in all settings. Potential advantages of TAPP are the reduction of postoperative complications, earlier recovery, and the possibility of bilateral treatment.

[Neutrophil-to-lymphocyte ratio as a predictor of intestinal resection in incarcerated inguinal hernias]

INTRODUCTION

Inguinal hernia is defined as a projection of an organ through the inguinal canal. This can be incarcerated as a consequence of continuous inflammation of the hernial sac, which will prevent its return, causing damage to the venous and lymphatic return of the viscera. The neutrophil-to-lymphocyte ratio (NLR) is an easily accessible inflammatory biomarker obtained from blood cell counts. Therefore, the objective was to determine if the NLR is useful as a predictor of intestinal resection in incarcerated inguinal hernias.

MATERIAL AND METHOD

An observational, analytical, diagnostic test and retrospective study was carried out in a hospital in northern Peru from January 2013 to August 2019 in the Department of General Surgery and Emergency Surgery and Critical Care. Patients diagnosed with unilateral inguinal hernia with intestinal obstruction were included. For the relationship between the event and the exposure, it was analyzed using Chi square (χ2) and T-Student. The sensitivity, specificity, positive predictive value, negative predictive value of the NLR as well as the area under the ROC curve were found to determine the predictive accuracy.

RESULTS

161 patients with incarcerated inguinal hernia were studied: group I (20 patients with intestinal resection) and group II (141 patients without intestinal resection). The mean age in groups I and II were 69±16 and 60±17 years (p<0.05); the frequency in males was 70% in group I and 76% in group II (p>0.05). Intestinal obstruction and duration of incarceration >24 hours and the platelet-to-lymphocyte ratio demonstrated significant differences. With respect to NLR taking a cut-off point ≥6.5, a sensitivity of 75%, a specificity of 93.62%, a positive predictive value of 62.5% and a negative predictive value of 96.35% were observed; In addition, when analyzing with the ROC curve, a value of 5.14 was obtained as a predictor of intestinal resection with a sensitivity of 90% and a specificity of 84.4% (p<0.001). Therefore, the NLR >5.14 predicts intestinal resection in patients with incarcerated inguinal hernias with an area under the curve of 0.92 at the Belen Hospital of Trujillo.

CONCLUSIONS

The neutrophil-to-lymphocyte ratio is useful for predicting intestinal resection with a diagnostic accuracy of 92%.

Cesena guidelines: WSES consensus statement on laparoscopic-first approach to general surgery emergencies and abdominal trauma

BACKGROUND

Laparoscopy is widely adopted across nearly all surgical subspecialties in the elective setting. Initially finding indication in minor abdominal emergencies, it has gradually become the standard approach in the majority of elective general surgery procedures. Despite many technological advances and increasing acceptance, the laparoscopic approach remains underutilized in emergency general surgery and in abdominal trauma. Emergency laparotomy continues to carry a high morbidity and mortality. In recent years, there has been a growing interest from emergency and trauma surgeons in adopting minimally invasive surgery approaches in the acute surgical setting. The present position paper, supported by the World Society of Emergency Surgery (WSES), aims to provide a review of the literature to reach a consensus on the indications and benefits of a laparoscopic-first approach in patients requiring emergency abdominal surgery for general surgery emergencies or abdominal trauma.

METHODS

This position paper was developed according to the WSES methodology. A steering committee performed the literature review and drafted the position paper. An international panel of 54 experts then critically revised the manuscript and discussed it in detail, to develop a consensus on a position statement.

RESULTS

A total of 323 studies (systematic review and meta-analysis, randomized clinical trial, retrospective comparative cohort studies, case series) have been selected from an initial pool of 7409 studies. Evidence demonstrates several benefits of the laparoscopic approach in stable patients undergoing emergency abdominal surgery for general surgical emergencies or abdominal trauma. The selection of a stable patient seems to be of paramount importance for a safe adoption of a laparoscopic approach. In hemodynamically stable patients, the laparoscopic approach was found to be safe, feasible and effective as a therapeutic tool or helpful to identify further management steps and needs, resulting in improved outcomes, regardless of conversion. Appropriate patient selection, surgeon experience and rigorous minimally invasive surgical training, remain crucial factors to increase the adoption of laparoscopy in emergency general surgery and abdominal trauma.

CONCLUSIONS

The WSES expert panel suggests laparoscopy as the first approach for stable patients undergoing emergency abdominal surgery for general surgery emergencies and abdominal trauma.

The effect of breathing on the in vivo mechanical characterization of linea alba by ultrasound shearwave elastography

The most common surgical repair of abdominal wall hernia consists in implanting a mesh to reinforce hernia defects during the healing phase. Ultrasound shearwave elastography (SWE) is a promising non-invasive method to estimate soft tissue mechanical properties at bedside through shear wave speed (SWS) measurement. Combined with conventional ultrasonography, it could help the clinician plan surgery. In this work, a novel protocol is proposed to reliably assess the stiffness of the linea alba, and to evaluate the effect of breathing and of inflating the abdomen on SWS. Fifteen healthy adults were included. SWS was measured in the linea alba, in the longitudinal and transverse direction, during several breathing cycle and during active abdominal inflation. SWS during normal breathing was 2.3 [2.0; 2.5] m/s in longitudinal direction and 2.2 [1.9; 2.7] m/s in the transversal. Inflating the abdomen increased SWS both in longitudinal and transversal direction (3.5 [2.8; 5.8] m/s and 5.2 [3.0; 6.0] m/s, respectively). The novel protocol significantly improved the reproducibility relative to the literature (8% in the longitudinal direction and 14% in the transverse one). Breathing had a mild effect on SWS, and accounting for it only marginally improved the reproducibility. This study proved the feasibility of the method, and its potential clinical interest. Further studies on larger cohort should focus on improving our understanding of the relationship between abdominal wall properties and clinical outcomes, but also provide a cartography of the abdominal wall, beyond the linea alba.

Mesh versus non-mesh for emergency groin hernia repair

BACKGROUND

A groin hernia is a collective name for inguinal and femoral hernias, which can present acutely with incarceration or strangulation of the hernia sac content, requiring emergency treatment. Timely repair of emergency groin hernias is crucial due to the risk of reduced blood supply and thus damage to the bowel, but the optimal surgical approach is unclear. While mesh repair is the standard treatment for elective hernia surgery, using mesh for emergency groin hernia repair remains controversial due to the risk of surgical site infection.

OBJECTIVES

To assess the benefits and harms of mesh compared with non-mesh in emergency groin hernia repair in adult patients with an inguinal or femoral hernia.

SEARCH METHODS

On 5 August 2022, we searched the following databases: CENTRAL, MEDLINE Ovid, and Embase Ovid, as well as two trial registers for ongoing and completed trials. Additionally, we performed forward and backward citation searches for the included trials and relevant review articles. We searched without any language or publication restrictions.

SELECTION CRITERIA

We included randomised controlled trials (RCTs) comparing mesh with non-mesh repair in emergency groin hernia surgery in adults. We included any mesh and any non-mesh repairs. All studies fulfilling the study, participant, and intervention criteria were included irrespective of reported outcomes.

DATA COLLECTION AND ANALYSIS

We used standard Cochrane methodology. We presented dichotomous data as risk ratios (RR) with 95% confidence intervals (CI). We based missing data analysis on best- and worst-case scenarios. For outcomes with sufficiently low heterogeneity, we performed meta-analyses using the random-effects model. We analysed subgroups when feasible, including the degree of contamination. We used RoB 2 for risk of bias assessment, and summarised the certainty of evidence using GRADE.

MAIN RESULTS

We included 15 trials randomising 1241 participants undergoing emergency groin hernia surgery with either mesh (626 participants) or non-mesh hernia repair (615 participants). The studies were conducted in China, the Middle East, and South Asia. Most patients were men, and most participants had an inguinal hernia (41 participants had femoral hernias). The mean/median age in the mesh group ranged from 35 to 70 years, and from 41 to 69 years in the non-mesh group. All studies were performed in a hospital emergency setting (tertiary care) and lasted for 11 to 139 months, with a median study duration of 31 months. The majority of the studies only included participants with clean to clean-contaminated surgical fields. For all outcomes, we considered the certainty of the evidence to be very low, mainly downgraded due to high risk of bias (due to deviations from intended intervention and missing outcome data), indirectness, and imprecision. Mesh hernia repair may have no effect on or slightly increase the risk of 30-day surgical site infections (RR 1.66, 95% CI 0.96 to 2.88; I² = 21%; 2 studies, 454 participants) when compared with non-mesh hernia repair, but the evidence is very uncertain. The evidence is also very uncertain about the effect of mesh hernia repair compared with non-mesh hernia repair on 30-day mortality (RR 1.38, 95% CI 0.58 to 3.28; 1 study, 208 participants). In summary, the results showed 70 more (from 5 fewer to 200 more) surgical site infections and 29 more (from 32 fewer to 175 more) deaths within 30 days of mesh hernia repair per 1000 participants compared with non-mesh hernia repair. The evidence is very uncertain about 90-day surgical site infections after mesh versus non-mesh hernia repair (RR 1.00, 95% CI 0.15 to 6.64; 1 study, 60 participants; very low-certainty evidence). No 30-day recurrences were recorded, and mesh hernia repair may not reduce recurrence within one year (RR 0.19, 95% CI 0.04 to 1.03; I² = 0%; 2 studies, 104 participants; very low-certainty evidence). Within 30 days of hernia repair, no meshes were removed from clean to clean-contaminated fields, but 6.7% of meshes (1 study, 208 participants) were removed from contaminated to dirty surgical fields. Among the four studies reporting 90-day mesh removal, no events occurred. We were not able to identify any studies reporting complications classified according to the Clavien-Dindo Classification or reoperation for complications within 30 days of repair.

AUTHORS' CONCLUSIONS

Our results show that in terms of 30-day surgical site infections, 30-day mortality, and hernia recurrence within one year, the evidence for the use of mesh hernia repair compared with non-mesh hernia repair in emergency groin hernia surgery is very uncertain. Unfortunately, firm conclusions cannot be drawn due to very low-certainty evidence and meta-analyses based on small-sized and low-quality studies. There is a need for future high-quality RCTs or high-quality registry-based studies if RCTs are unfeasible.

Characterization and in vivo evaluation of a fabricated absorbable poly(vinyl alcohol)-based hernia mesh

The most widely taken medical approach toward hernia repair involves the implementation of a prosthetic mesh to cover the herniated site and reinforce the weakened area of the abdominal wall. Biodegradable meshes can serve as biocompatible grafts with a low risk of infection. However, their major complication is associated with a high rate of degradation and hernia recurrence. We proposed a facile and cost-effective method to fabricate a poly(vinyl alcohol)-based mesh, using the solution casting technique. The inclusion of zinc oxide nanoparticles, citric acid, and three cycles of freeze-thaw were intended to ameliorate the mechanical properties of poly(vinyl alcohol). Several characterization, cell culture, and animal studies were conducted. Swelling and water contact angle measurements confirmed good water uptake capacity and wetting behavior of the final mesh sample. The synthesized mesh acquired a high mechanical strength of 52.8 MPa, and its weight loss was decreased to 39 %. No cytotoxicity was found in all samples. In vivo experiments revealed that less adhesion and granuloma formation, greater tissue integration, and notably higher neovascularization rate were resulted from implanting this fabricated hernia mesh, compared to commercial Prolene® mesh. Furthermore, the amount of collagen deposition and influential growth factors were enhanced when rats were treated with the proposed mesh instead of Prolene®.

Readmissions after emergent incisional ventral hernia repair: a retrospective review of the nationwide readmissions database

Emergent ventral hernia repair (eVHR) is associated with significant morbidity, yet there is no consensus regarding optimal surgical approach. We hypothesized that eVHR with synthetic mesh would have a higher readmission rate compared to primary eVHR or biologic mesh repair. Retrospective analysis of the Nationwide Readmissions Database (NRD) was conducted for patient entries between 2016 and 2018. Adult patients who underwent eVHR were included. Patient demographics, comorbidities, and surgical techniques were compared between readmitted and non-readmitted patients. Predictors of readmission were assessed using multivariate analysis with propensity weighting for various eVHR techniques. Secondary outcomes included hospital length of stay and readmission diagnoses. 43,819 patients underwent eVHR; of the 22,732 with 6 months of follow-up, 6382 (28.1%) were readmitted. The majority of readmissions occurred within the first 30 days (51.8%). Over half of the readmissions were related to surgical complications (50.6%), the most common being superficial surgical site infection (30.1%) and bowel obstruction/ileus (12.2%). In the multivariate analysis, predictors of 30-day readmission included use of synthetic mesh (OR 1.07, 95% CI 1.00-1.14), biologic mesh (OR 1.26, 95% CI 1.06-1.49), and need for concomitant large bowel resection (OR 1.46, 95% CI 1.30-1.65). eVHR is associated with high rates of readmission. Primary repair had favorable odds for readmission and lower risk of surgical complications compared to synthetic and biologic mesh repairs. Synthetic repair had lower odds of readmission than biologic repair. Given the inherent limitations of the NRD, further institutional prospective studies are required to confirm these findings.

Primary Uncomplicated Ventral Hernia Repair: Guidelines and Practice Patterns for Routine Hernia Repairs

Surgical repair of primary umbilical and epigastric hernias are among the most common abdominal operations in the world. The hernia defects range from small (<1 cm) to large and complex even in the absence of prior incision or repair. Mesh has generally been shown to decrease recurrence rates, and its use and location of placement should be individualized for each patient. Open, laparoscopic, and robotic approaches provide unique considerations for the technical aspects of primary repair with or without mesh augmentation.

Update of the international HerniaSurge guidelines for groin hernia management

BACKGROUND

Groin hernia repair is one of the most common operations performed globally, with more than 20 million procedures per year. The last guidelines on groin hernia management were published in 2018 by the HerniaSurge Group. The aim of this project was to assess new evidence and update the guidelines. The guideline is intended for general and abdominal wall surgeons treating adult patients with groin hernias.

METHOD

A working group of 30 international groin hernia experts and all involved stakeholders was formed and examined all new literature on groin hernia management, available until April 2022. Articles were screened for eligibility and assessed according to GRADE methodologies. New evidence was included, and chapters were rewritten. Statements and recommendations were updated or newly formulated as necessary.

RESULTS

Ten chapters of the original HerniaSurge inguinal hernia guidelines were updated. In total, 39 new statements and 32 recommendations were formulated (16 strong recommendations). A modified Delphi method was used to reach consensus on all statements and recommendations among the groin hernia experts and at the European Hernia Society meeting in Manchester on October 21, 2022.

CONCLUSION

The HerniaSurge Collaboration has updated the international guidelines for groin hernia management. The updated guidelines provide an overview of the best available evidence on groin hernia management and include evidence-based statements and recommendations for daily practice. Future guideline development will change according to emerging guideline methodology.

Comparison of mechanical properties and host tissue response to OviTex™ and Strattice™ surgical meshes

PURPOSE

This study compared the in vitro/benchtop and in vivo mechanical properties and host biologic response to ovine rumen-derived/polymer mesh hybrid OviTex™ with porcine-derived acellular dermal matrix Strattice™ Firm.

METHODS

OviTex 2S Resorbable (OviTex 2S-R) and Strattice morphology were examined in vitro using histology and scanning electron microscopy; mechanical properties were assessed via tensile test; in vivo host biologic response and explant mechanics were evaluated in a rodent subcutaneous model. Separately, OviTex 1S Permanent (OviTex 1S-P) and Strattice were evaluated in a primate abdominal wall repair model.

RESULTS

OviTex 2S-R demonstrated layer separation, whereas Strattice retained its structural integrity and demonstrated higher maximum load than OviTex 2S-R out-of-package (124.8 ± 11.1 N/cm vs 37.9 ± 5.5 N/cm, p < 0.001), 24 h (55.7 ± 7.4 N/cm vs 5.6 ± 3.8 N/cm, p < 0.001), 48 h (45.3 ± 14.8 N/cm vs 2.8 ± 2.6 N/cm, p = 0.003), and 72 h (29.2 ± 10.5 N/cm vs 3.2 ± 3.1 N/cm, p = 0.006) following collagenase digestion. In rodents, inflammatory cell infiltration was observed between OviTex 2S-R layers, while Strattice induced a minimal inflammatory response. Strattice retained higher maximum load at 3 (46.3 ± 27.4 N/cm vs 9.5 ± 3.2 N/cm, p = 0.041) and 6 weeks (28.6 ± 14.1 N/cm vs 7.0 ± 3.0 N/cm, p = 0.029). In primates, OviTex 1S-P exhibited loss of composite mesh integrity whereas Strattice integrated into host tissue with minimal inflammation and retained higher maximum load at 1 month than OviTex 1S-P (66.8 ± 43.4 N/cm vs 9.6 ± 4.4 N/cm; p = 0.151).

CONCLUSIONS

Strattice retained greater mechanical strength as shown by lower susceptibility to collagenase degradation than OviTex 2S-R in vitro, as well as higher maximum load and improved host biologic response than OviTex 2S-R in rodents and OviTex 1S-P in primates.

Current opinions in inguinal hernia emergencies: A comprehensive review of related evidences

INTRODUCTION:

Groins hernia emergencies are evaluated under two definitions: incarceration that is defined as a hernia in which its content becomes irreducible at the passage in the abdominal wall and strangulation that compromises the blood supply to the omentum and/or intestines within the hernia sac. The purpose of this paper was to determine the latest knowledge about groin hernia emergencies.

MATERIALS AND METHODS:

PubMed and Google Scholar searches were done by using combinations of “inguinal hernia” and “emergency”, and “groin hernia” and “emergency” keywords at first. More detailed searches were performed to enrich the “Surgical treatment” part of the paper by using “emergency hernia” and “mesh”, “emergency hernia,” and “laparoscopic versus open” keywords afterward.

RESULTS:

Approximately 5%–10% of all inguinal repairs are performed in emergency settings. Both lateral and medial inguinal hernias can get incarcerated or strangulated, whereas the risk for femoral hernias is higher. Manual reduction of incarcerated inguinal hernias is successful in approximately 60% of the cases. The prediction of bowel ischemia due to strangulation may be possible with some blood tests and imaging studies like ultrasound and computed tomography. It has been shown that the longer the duration of incarceration the higher the risk of bowel ischemia. Bowel resection which is more frequently necessary in patients with advanced age, female gender, and femoral hernia, is associated with an increased risk of perioperative mortality. Some surgeons still use tissue-suture repairs in an emergency setting; however, mesh repairs have been shown to be safe unless there is an overt contamination.

CONCLUSION:

Early treatment of complicated groin hernias is the key to favorable outcomes. The need for bowel resection and advanced age are the most prominent factors for morbidity and mortality. Mesh repairs are safe in most cases. Minimally invasive approaches promise good results in experienced centers.

Laparoscopic approach in emergency for the treatment of acute incarcerated groin hernia: a systematic review and meta-analysis

PURPOSE

Minimally invasive approach for acute incarcerated groin hernia repair is still debated. To clarify this debate, a literature review was performed.

METHODS

Search was performed in PubMed, Embase, Scopus, Web of Science, and Cochrane databases, founding 28,183 articles.

RESULTS

Fifteen articles, and 433 patients were included (16 bilateral hernia, range 3-8). Three hundred and eighty-eight (75.3%) and 103 patients (22.9%) underwent transabdominal preperitoneal and totally extraperitoneal repair, respectively, and in 5 patients, the defect was buttressed with broad ligament (1.1%) (not specified in 3 patients). Herniated structures were resected in 48 cases (range 1-9). Intraoperative complications and conversion occurred in 4 (range 0-1) and 10 (range 0-3) patients, respectively. Mean operative time and hospital stay ranged between 50 and 147 min, and 2 and 7 days, respectively. Postoperative complications ranged between 1 and 19. Five studies compared laparoscopic and open approaches (163 and 235 patients). Herniated structures were resected in 19 (11.7%) and 42 cases (17.9%) for laparoscopic and open approach, respectively (p = 0.1191). Intraoperative complications and conversion occurred in one (0.6%) and 5 (2.1%) patients (p = 0.4077), and in two (1.2%) and 19 (8.1%) patients (p = 0.0023), in case of laparoscopic or open approach, respectively. Mean operative time and hospital stay were 94.4 ± 40.2 and 102.8 ± 43.7 min, and 4.8 ± 2.2 and 11 ± 3.1 days, in laparoscopic or open approach, respectively. Sixteen (9.8%) and 57 (24.3%) postoperative complications occurred.

CONCLUSION

Laparoscopy seems to be a safe and feasible approach for the treatment of acute incarcerated groin hernia. Further studies are required for definitive conclusions.

Management of Littre Hernia-Case Report and Systematic Review of Case Reports

Littre hernia is a rare type of hernia in which a Meckel diverticulum is found in the hernia sac. Given the rare nature of this disease, little data on demographics and surgical management exists. In this article, we provide a case report of a strangulated inguinal Littre hernia and perform a systematic review of the literature. The PubMed database was searched on 5 March 2022, and all cases of Littre hernia in adults that had English abstracts or full-text were analyzed. Our primary objective was to evaluate the surgical management and outcomes of this particular type of hernia, and our secondary objectives were to assess demographic characteristics, presentation particularities, and recurrence rates. We identified 89 articles with 98 cases, including our own. Results show a high prevalence of complications described intraoperatively, with strangulation being present in up to 38.46% of patients. The laparoscopic approach was utilized in patients with femoral, inguinal, and umbilical hernias. The most commonly performed type of resection was MD resection, followed by bowel resection, while a minority of cases (5.48%) remained unresected. Mesh repair was more frequently performed in patients with MD resection. A mortality rate of 8.7% in patients who underwent bowel resection was found. A relatively high number of reports of ectopic tissue (21.21%), ulceration (12.12%), and tumors (9.09%) were found. The average follow-up was 19.5 ± 10.29 months, with no hernia recurrence. In conclusion, most cases are admitted in an emergency setting, and intestinal obstruction is frequently associated. A minimally invasive approach can be an option even for complicated hernias. MD resection or bowel resection is usually employed, depending on the extent of ischemic lesions. Patients undergoing bowel resection may be prone to worse outcomes.

Manual reduction for incarcerated obturator hernia

Emergent surgery is a common approach for incarcerated obturator hernias, with high morbidity and mortality rates. Moreover, there have been reports of elective surgery cases after noninvasive manual reduction. For a decade, the initial approach in our institution is also manual reduction unless bowel viability is poor. This study aimed to clarify the efficacy and safety of manual reduction followed by elective surgery. We retrospectively reviewed 50 cases of incarcerated obturator hernia from 2010 to 2022 at Iwate Prefectural Iwai Hospital. Manual reduction was attempted in 31 (62%) patients. The reduction was successful in 21 (42%) patients, and most of them received mesh repair using the extraperitoneal approach as elective surgery. However, two patients underwent emergent surgery in the waiting period because of late-onset constriction and a small bowel perforation. Patients with irreducible hernia underwent emergent surgery, except for two patients who received the best supportive care. Postoperative complications were observed in 5% and 22% of reducible and irreducible cases, respectively. Postoperative mortality was zero in both groups. Manual reduction is useful in some cases, but careful observation is needed because late-onset constriction and perforation could occur.

Emergency hernia repair: a retrospective cross-sectional study on the treatment modalities and adherence to guidelines in a tertiary public hospital

BACKGROUND

Emergency presentations of hernias can pose significant morbidity. In addition, providing optimal surgical intervention can be challenging due to patient and disease factors with multiple treatment modalities available. Recently there have been several guidelines written to help standardize practices in hernia management. The aim of our study was to review emergency hernia operations at our tertiary level teaching hospital, the method of repair and how this matched to international guidelines.

METHODS

We performed a retrospective chart review of all the patients who underwent emergency hernia surgery for strangulated/incarcerated hernias in our department over a 3-year period. Adherence to guidelines was assessed looking at appropriateness of mesh utilization, as well as the appropriateness of antibiotic usage.

RESULTS

A total of 184 cases from April 1st 2018 to March 31st 2021 were included. Of these hernias 12% contained necrotic or perforated bowel, 42% contained viable incarcerated bowel, and 45% contained just incarcerated fat. The compliance to the appropriate use of mesh overall was 85%, with a variation by hernia type. The global compliance to appropriate antibiotic therapy was high, at 89.7%. With antibiotic use compliance being very high in clean wounds (95.6%), and dirty wounds (100%). But lower in clean/contaminated or contaminated wounds (36.8%).

CONCLUSION

Compliance at our hospital was globally good. Areas of decreased compliance seem to be mostly regarding mesh use and antibiotic use in potentially contaminated fields and the concept of risk of bacterial translocation versus actual contamination, as well as in mesh use in smaller umbilical hernias.

'Flip-flap' hernia sac sandwich mesh hernioplasty for giant incisional hernia

Purpose: The treatment of giant ventral hernia (GVH) with domain loss is a challenge for surgeons. This modified and simplified form of sandwich technique in a form of flip-flap repair was done to assess the outcomes of GVH repair by using the hernia sac taking into account the late complications in terms of recurrence, mesh explantation and early: SSO (surgical site occurrence). Material and method: A total of 21 patients of GVH were treated with flip-flap repair technique in the department of surgery in a teaching hospital in the central India between December 16 to June 21. In flip-flap technique the hernia sac is tailored in the best possible way, by making multiple layered flaps encasing the Polypropylene mesh in between, separating it from intraperitoneal contents and subcutaneous tissue. Results: In this prospective and interventional study, the collected data revealed the mean follow up period of 22.3 months (7months to 48months). Mean age was 44.2years (27-65 years). SSO was seen in 38% of cases mainly in the form of SSI. No explantation of mesh and recurrence was seen in any patient. Conclusion: The flip-flap repair technique is safe and effective surgical technique that can be used for the treatment of GVH regardless of the size, BMI or position of hernia.

Permanent vs Absorbable Mesh for Ventral Hernia Repair in Contaminated Fields: Multicenter Propensity-Matched Analysis of 1-Year Outcomes Using the Abdominal Core Health Quality Collaborative Database

BACKGROUND

Traditionally, the use of absorbable mesh in contaminated fields aimed to reduce postoperative morbidity at the expense of increased hernia recurrence. This dogma has recently been challenged in randomized trials that demonstrate the advantages of permanent mesh in this setting. Although these studies are of high quality, their reproducibility across institutions is limited. We sought to compare the outcomes between permanent and absorbable mesh in a multicentric cohort from the Abdominal Core Health Quality Collaborative.

STUDY DESIGN

Patients who underwent elective ventral hernia repair in class II and III surgeries from January 2013 to December 2021 were identified within the Abdominal Core Health Quality Collaborative. Outcomes were compared among permanent (P), absorbable synthetic (AS), and biologic (B) mesh at 30 days and 1 year using a propensity score-matched analysis.

RESULTS

A total of 2,484 patients were included: 73.4% P, 11.2% AS, and 15.4% B. Of these, 64% were clean-contaminated and 36% contaminated interventions. After propensity score-matched analysis, there was no significant difference between groups regarding surgical site occurrence (P 16%, AS 15%, B 21%, p = 0.13), surgical site infection (P 12%, AS 14%, B 12%, p = 0.64), and surgical site occurrence requiring procedural intervention at 30 days (P 12%, AS 15%, B 17%, p = 0.1). At 1 year, the recurrence rate was significantly lower among the permanent group (P 23%, AS 40%, B 32%, p = 0.029).

CONCLUSIONS

In this multicentric cohort, permanent mesh has equivalent 30-day outcomes and lower rates of hernia recurrence at 1 year after hernia repair in contaminated fields.

Repair of a giant inguinoscrotal hernia with herniation of the ileum and sigmoid colon: A case report

BACKGROUND

Giant inguinoscrotal hernias are huge inguinal hernias that extend below the midpoint of the inner thigh in the standing posture. Giant inguinoscrotal hernias are rare in developed countries because of their better medical resources and early treatment. However, they can develop in patients who refuse surgery or ignore their condition. Intervention is inevitable because strangulation and organ perforation can occur, leading to peritonitis and sepsis. Common surgical approaches include open abdominal and inguinal approaches or a combination of both.

CASE SUMMARY

We present the case of a 73-year-old man who visited our emergency department with a huge mass in his left scrotum and septic complications. Abdominal computed tomography revealed a large left inguinoscrotal hernia that contained small bowel loops and the colon. Emergency surgical intervention was performed immediately because intestinal strangulation was highly suspected. The operative repair was performed using a combination of mini-exploratory laparotomy and the inguinal approach. The incarcerated organs, which included the ileum and sigmoid colon, had relatively good intestinal perfusion without perforation or ischemic changes. They were successfully reduced into the abdomen, and bowel resection was not necessary. A tension-free prosthetic mesh was used for the hernia repair. Two weeks after the initial surgery, and with adequate antimicrobial therapy, the patient recovered and was discharged from our hospital. No evidence of hernia relapse was noted during the outpatient follow-up examination 3 mo after surgery.

CONCLUSION

Emergency surgery involving combined mini-exploratory laparotomy and the inguinal approach should be performed for serious incarcerated giant inguinoscrotal hernias.

Differences in in-hospital outcomes and healthcare utilization for laparoscopic versus open approach for emergency inguinal hernia repair: a nationwide analysis

PURPOSE

There has been a growing debate of whether laparoscopic or open surgical techniques are superior for inguinal hernia repair. For incarcerated and strangulated inguinal hernias, the laparoscopic approach remains controversial. This study aims to be the first nationwide analysis to compare clinical and healthcare utilization outcomes between laparoscopic and open inguinal hernia repair in an emergency setting.

METHODS

A retrospective analysis of the National Inpatient Sample was performed. All patients who underwent laparoscopic inguinal hernia repair (LIHR) and open inguinal hernia repair (OIHR) between October 2015 and December 2019 were included. The primary outcome was mortality, and secondary outcomes include post-operative complications, ICU admission, length of stay (LOS), and total admission cost. Two approaches were compared using univariate and multivariate logistic and linear regression.

RESULTS

Between the years 2015 and 2019, 17,205 patients were included. Among these, 213 patients underwent LIHR and 16,992 underwent OIHR. No difference was observed between laparoscopic and open repair for mortality (odds ratio [OR] 0.80, 95% CI [0.25, 2.61], p = 0.714). Additionally, there was no significant difference between groups for post-operative ICU admission (OR 1.11, 95% CI [0.74, 1.67], p = 0.614), post-operative complications (OR 1.09, 95% CI [0.76, 1.56], p = 0.647), LOS (mean difference [MD]: -0.02 days, 95% CI [- 0.56, 0.52], p = 0.934), or total admission cost (MD: $3,028.29, 95% CI [$- 110.94, $6167.53], p = 0.059).

CONCLUSION

Laparoscopic inguinal hernia repair is comparable to the open inguinal hernia repair with respect to low rates of morbidity, mortality as well as healthcare resource utilization.

Surgical site infections after emergency hernia repair: substudy from the Management of Acutely Symptomatic Hernia (MASH) study

INTRODUCTION

Acutely symptomatic abdominal wall and groin hernias (ASH) are a common acute surgical presentation. There are limited data to guide decisions related to surgical repair technique and use of antibiotics, which can be driven by increased risk of surgical site infection (SSI) in this group. This study aims to report rates of SSI following ASH repair and explore the use of patient-reported outcome measure reporting in this setting.

METHODS

An 18-week, UK-based, multicentre prospective cohort study (NCT04197271) recruited adults with ASH. This study reports operatively managed patients. Data on patient characteristics, inpatient management, quality of life, complications, and wound healing (Bluebelle score) were collected. Descriptive analyses were performed to estimate event rates of SSI and regression analysis explored the relationship between Bluebelle scores and SSI. The 30 and 90-day follow-up visits assessed complications and quality of life.

RESULTS

The MASH study recruited 273 patients, of whom 218 were eligible for this study, 87.2 per cent who underwent open repair. Mesh was used in 123 patients (50.8 per cent). Pre- and postoperative antibiotics were given in 163 (67.4 per cent) and 28 (11.5 per cent) patients respectively. There were 26 reported SSIs (11.9 per cent). Increased BMI, incisional, femoral, and umbilical hernia were associated with higher rates of SSI (P = 0.006). In 238 patients, there was a difference in healthy utility values at 90 days between patients with and without SSI (P = 0.025). Also, when analysing 191 patients with Bluebelle scores, those who developed an SSI had higher Bluebelle values (P < 0.001).

CONCLUSION

SSI is frequent in repair of acutely symptomatic hernia and correlates with BMI and site of hernia.

The use of botulinum toxin in the acute management of symptomatic complex incisional hernia: a case series

PURPOSE

Complications of incisional hernia are amongst the commonest presentations to the emergency surgical take. Outcomes from emergency hernia repair are poor, particularly for those with complex defects and for the growing population of comorbid, high-risk patients. Attempts to avoid emergency surgery by improving success rates of non-operative management could prove hugely beneficial. Botulinum toxin A (Botox) is already used in the elective management of incisional hernia and this study evaluates if the relaxation produced could be used to augment the outcomes of conservative management of acutely presenting incisional hernia.

METHODS

Patients presenting between October 2020 and April 2022 without evidence of visceral ischaemia, who had been selected for a non-operative approach, were given 300 units of Botox under image guidance to the abdominal wall in addition to standard conservative measures.

RESULTS

Twelve patients were eligible for Botox administration. Median age was 75 years and median BMI was 36.45 kg/m². All patients were high risk; minimum ASA score was 3, and median frailty score was 5. In ten patients, symptoms resolved following Botox allowing for discharge without further complication. Seven subsequently referred on to the abdominal wall team. Symptoms did not settle in the two remaining patients; one required emergency laparotomy and the second was palliated.

CONCLUSION

Botox may be a useful adjunct to established non-operative measures in patients with acute presentations of incisional hernia. It may improve the acute symptoms, eliminate the need for high-risk emergency surgery, or provide a bridge to abdominal wall reconstruction.

Mortality after emergency versus elective groin hernia repair: a systematic review and meta-analysis

BACKGROUND

Emergency groin hernia repair is associated with increased mortality risk, but the actual risk is unknown. Therefore, this review aimed to investigate 30- and 90-day postoperative mortality in adult patients who had undergone emergency or elective groin hernia repair.

METHODS

This review was reported following PRISMA 2020 guidelines, and a protocol (CRD42021244412) was registered to PROSPERO. A systematic search was conducted in PubMed, EMBASE, and Cochrane CENTRAL in April 2021. Studies were included if they reported 30- or 90-day mortality following an emergency or elective groin hernia repair. Meta-analyses were conducted when possible, and subgroup analyses were made for bowel resection, sex, and hernia type. According to the study design, the risk of bias was assessed using either the Newcastle-Ottawa Scale or Cochrane Risk of Bias tool.

RESULTS

Thirty-seven studies with 30,740 patients receiving emergency repair and 457,253 receiving elective repair were included. The 30-day mortality ranged from 0-11.8% to 0-1.7% following emergency and elective repair, respectively. The risk of 30-day mortality following emergency repair was estimated to be 26-fold higher than after elective repair (RR = 26.0, 95% CI 21.6-31.4, I2 = 0%). A subgroup meta-analysis on bowel resection in emergency repair estimated 30-day mortality to be 7.9% (95% CI 6.5-9.3%, I2 = 6.4%). Subgroup analyses on sex and hernia type showed no differences regarding the mortality risk in elective surgery. However, femoral hernia and female sex significantly increased the risk of mortality in emergency surgery, both given by a risk ratio of 1.7.

CONCLUSION

The overall mortality after emergency groin hernia repair is 26-fold higher than after elective repair, but the increased risk is attributable mostly to female and femoral hernias.

TRIAL REGISTRATION

PROSPERO protocol (CRD42021244412).

Gangrene of the Colon Ascendens, Colon Transversum, and Lienal Flexure in a Massive Strangulated Umbilical Hernia

This case describes an 80-year-old obese woman who presented with a giant, incarcerated umbilical hernia. The hernia was present for over 15 years, continuously increasing in size. The only symptom was the pain which lasted about two hours before arrival at the hospital. In an emergency laparotomy, gangrenous colon ascendens, transversum, and lienal flexure have been found. A subtotal colectomy with the creation of terminal ileostomy without hernia repair has been done. The recovery was uneventful, and the patient was discharged on the fifth postoperative day. After one month, the reconstruction of the digestive continuity with an L-L ileo-descendo anastomosis followed. The patient decided against the hernia repair.

An Evaluation of the Evidence Guiding Adult Midline Ventral Hernia Repair

Purpose:  Several guidelines have been published in recent years to guide the clinician in ventral hernia repair. This review distils this advice, critically assesses their evidence base, and proposes avenues for future study. Methods:  A PUBMED search identified four guidelines addressing midline ventral hernia repair published by major surgical societies between 2016 and 2020. The studies used to inform the advice have been critically appraised, including 20 systematic reviews/meta-analyses, 10 randomized controlled trials, 32 cohort studies, and 14 case series. Results:  Despite a lack of randomized controlled trials, case heterogeneity, and variation in outcome reporting, key themes have emerged. Preoperative computed tomography scan assesses defect size, loss of domain, and the likely need for component separation. Prehabilitation, frailty assessment, and risk stratification are beneficial in complex cases. Minimally invasive component separation techniques, Botox injection, and progressive pneumoperitoneum represent novel techniques to promote closure of large fascial defects. Rives-Stoppa sublay mesh repair has become the "gold" standard for open and minimally invasive repairs. Laparoscopic repair promotes early return to functional status. The enhanced-view totally extraperitoneal approach facilitates laparoscopic sublay mesh placement, avoiding mesh contact with viscera. Robotic techniques continue to evolve, although the evidence at present remains immature. Synthetic mesh is recommended for use in clean and clean-contaminated cases. However, optimism regarding the use of biologic and biosynthetic meshes in the contaminated setting has waned. Conclusions:  Surgical techniques in ventral hernia repair have advanced in recent years. High-quality data has struggled to keep pace; rigorous clinical trials are required to support the surgical innovation.

Mesh versus non‐mesh for emergency groin hernia repair

This is a protocol for a Cochrane Review (intervention). The objectives are as follows: