Treatment of Inguinal Hernia: Systematic Review and Updated Network Meta-Analysis of Randomized Controlled Trials

Effect of Laparoscopic Inguinal Hernia Repairs on Inflammatory Factors, Oxidative Stress Levels and Postoperative Recovery

Objective

To unravel the effects of different laparoscopic inguinal hernia repairs (IHRs) on inflammatory factors, oxidative stress, and postoperative recovery of inguinal hernia (IH) patients.

Methods

A total of 88 patients for laparoscopic treatment of IH were studied in a retrospective cohort, and were randomized into the transabdominal preperitoneal (TAPP) repair group (n = 44) and the total extraperitoneal (TEP) repair group (n = 44) according to the method of treatment. Patients in the TAPP group underwent laparoscopic TAPP IHR, while patients in the TEP group underwent laparoscopic TEP IHR. Visual analogue scores (VAS) were measured at 1, 3, and 7 d after repair. Gastrin (GAS), motilin (MTL), matrix metalloproteinase (MMP)-2, MMP-9, and tissue inhibitor of metalloproteinases-1 (TIMP-1) were assessed by enzyme-linked immunosorbent assay. Superoxide dismutase (SOD) was tested by spectrophotometry and malondialdehyde (MDA) and β-endorphin (β-EP) were examined by radioimmunoprecipitation. Total antioxidant capacity (T-AOC) was evaluated by chemical colorimetry, quality of life was evaluated by SF-36, and fibrinogen (FIB), C-reactive protein (CRP), antitrypsin (al-AT), and interleukin-6 (IL-6) levels were determined by immunoturbidimetry. Complications and postoperative recurrence were recorded.

Results

VAS scores in the TEP group were lower than those in the TAPP group. Operative time, hospital stay, time for postoperative activity out of bed, and time taken to exhaust were shorter in the TEP group than in the TAPP group. Intraoperative blood loss was less in the TEP group than in the TAPP group. GAS, MTL, SOD, and T-AOC were higher, and MDA, β-EP, CRP, FIB, alAT, IL-6, MMP-2, MMP-9, and TIMP-1 were lower in the TEP group than the TAPP group. Quality of life was improved in the TEP group compared with the TAPP group. There was no significant difference in the rate of postoperative complications and recurrence rates between both groups of patients.

Conclusion

For IHs, laparoscopic TEP repair can effectively relieve pain, reduce inflammatory factors and oxidative stress indices, and facilitate postoperative recovery.

Is previous radical prostatectomy a contraindication to minimally invasive inguinal hernia repair? A contemporary meta-analysis

INTRODUCTION

Traditionally, radical prostatectomy (RP) has been considered a contraindication to minimally invasive inguinal hernia repair. Purpose of this systematic review was to examine the current evidence and outcomes of minimally invasive inguinal hernia repair after RP.

MATERIALS AND METHODS

Web of Science, PubMed, and EMBASE data sets were consulted. Laparoscopic transabdominal preperitoneal repair (TAPP), robotic TAPP (r-TAPP), and totally extraperitoneal (TEP) repair were included.

RESULTS

Overall, 4655 patients (16 studies) undergoing TAPP, r-TAPP, and TEP inguinal hernia repair after RP were included. The age of the patients ranged from 35 to 85 years. Open (49.1%), laparoscopic (7.4%), and robotic (43.5%) RP were described. Primary unilateral hernia repair was detailed in 96.3% of patients while 2.8% of patients were operated for recurrence. The pooled prevalence of intraoperative complication was 0.7% (95% CI 0.2-3.4%). Bladder injury and epigastric vessels bleeding were reported. The pooled prevalence of conversion to open was 0.8% (95% CI 0.3-1.7%). The estimated pooled prevalence of seroma, hematoma, and surgical site infection was 3.2% (95% CI 1.9-5.9%), 1.7% (95% CI 0.9-3.1%), and 0.3% (95% CI = 0.1-0.9%), respectively. The median follow-up was 18 months (range 8-48). The pooled prevalence of hernia recurrence and chronic pain were 1.1% (95% CI 0.1-3.1%) and 1.9% (95% CI 0.9-4.1%), respectively.

CONCLUSIONS

Minimally invasive inguinal hernia repair seems feasible, safe, and effective for the treatment of inguinal hernia after RP. Prostatectomy should not be necessarily considered a contraindication to minimally invasive inguinal hernia repair.

To close, not to close, or to act bigger? Managing the defect of large direct inguinal hernia to reduce the risk of recurrence during laparoscopic TAPP repair: a retrospective cohort study

Hernia recurrence is a common complication after inguinal hernia repair. Recent studies suggest that laparoscopic mesh repair with closure of direct hernia defects can reduce recurrence rates. Our study examines the effectiveness of this approach. A retrospective, multi-center cohort study was conducted on cases performed from January 2013 to April 2021. Patients with direct inguinal hernias (M3 according to EHS classification) undergoing TAPP were included. Three groups were present: closed-defect group, non-closed placing a standard-sized mesh group or non-closed placing an XL-sized mesh group. A 2-year follow-up was recorded. A total of 158 direct M3 inguinal hernias in 110 patients who underwent surgery were present. After propensity score matching at a 1:1 ratio, 22 patients for each group were analyzed. The mean age of patients was 62 years (41-84); with the majority being male (84.8%). 22 patients (40 hernias) underwent closure of the defect; 22 patients (39 hernias) did not undergo closure and used a standard-sized mesh; 22 patients (27 hernias) did not undergo closure and used an XL-sized mesh. There were 5 recurrences at 1 year post-operatively: all in the non-closure group with standard-sized mesh. This difference was statistically significant (p = 0.044). There were 7 recurrences (6.6%) at 2 years post-operatively: 6 in the non-closure group with standard-sized mesh and 1 in the non-closure group with XL-sized mesh (p = 0.007). Closing large direct inguinal hernia defects has shown promise in reducing early recurrence rates. However, conducting larger RCTs in the future could provide more conclusive evidence that might impact the way we approach laparoscopic inguinal hernia repair.

Impact of patient's sex on groin hernia repair: A systematic review and meta-analysis

BACKGROUND

Groin hernia repair (GHR) is a performed procedure worldwide, with approximately 20 million surgeries carried out each year. Despite being less common in females, there is a lack of research on how sex influences the outcomes of GHR. This systematic review and meta-analysis aim to assess how patient sex impacts results in GHR.

METHODS

We performed a systematic review and meta-analysis according to Preferred Reporting Items for Systematic Review and Meta-Analyses guidelines. We searched for studies up to October 2023 in MEDLINE, EMBASE, and the Cochrane Central Register of Controlled Trials. The studies included focused on sex outcomes for both robotic and open GHR procedures. Data extraction and quality assessment were conducted using the Risk of Bias in Non-Randomized Studies - Of Interventions tool. Our statistical analysis was performed using the metafor package in RStudio.

RESULTS

After screening a total of 3917 articles, we identified 29 studies that met our criteria, comprising a total of 1,236,694 patients. Among them, 98,641 (7.98%) patients were females. Our findings showed that females had higher rates of hernia recurrence (RR 1.28), chronic pain (RR 1.52), and surgical site infections (SSIs) (RR 1.46) compared to males. Females showed a lower tendency to undergo minimally invasive surgery (MIS) with a relative risk of 0.82 (95% CI 0.69-0.97; p = 0.02).

CONCLUSION

Females tend to face higher rates of complications after GHR such as an elevated risk of chronic pain, recurrence, and surgical site infections (SSI). Moreover, they undergo fewer MIS options compared to males. These results underscore the importance of research to enhance outcomes for women undergoing GHR.

A single-center retrospective review of laparoscopic totally extraperitoneal versus robotic transabdominal preperitoneal inguinal hernia repair

Background

With the increased use of robotic surgery, robotic transabdominal preperitoneal repair (R-TAPP) has become a commonly used approach for inguinal hernia repair. The laparoscopic totally extraperitoneal repair (L-TEP) has the advantage of not entering the peritoneal cavity; however, it has greater technical difficulty. Robotic surgery has demonstrated superiority over laparoscopy in many surgical settings, but there is limited evidence comparing L-TEP and R-TAPP.

Methods

This was a retrospective review of patients who underwent L-TEP and R-TAPP at Baylor University Medical Center between December 2011 and January 2022. Information on patient demographic characteristics, comorbidities, postoperative complications, hospital length of stay, and postoperative complications requiring a procedure was collected.

Results

A total of 298 patients were analyzed; 245 underwent R-TAPP and 53 underwent L-TEP. Hernia recurrence was significantly decreased in those who underwent R-TAPP (1.2%) compared to L-TEP (9.4%) (P = 0.01). Postoperative pain was also significantly decreased in the R-TAPP group (5.3%) as compared to the L-TEP group (13.2%) (P = 0.01).

Conclusions

With the transition from L-TEP to R-TAPP over recent years, there is limited evidence supporting this change in practice. Our single-center retrospective review demonstrates that R-TAPP is noninferior to L-TEP and has significantly decreased hernia recurrence.

N-Butyl-2-Cyanoacrylate Adhesive Versus Absorbable Tacks in Laparoscopic Groin Hernia Repair: A Multicenter Randomized Clinical Trial

Objective

We aimed to determine whether n-butyl-2-cyanoacrylate (NB2C) adhesive is a safe and effective mechanism for nonpenetrating mesh and peritoneal fixation during laparoscopic groin hernia repair.

Background

Chronic pain after laparoscopic groin hernia repair has been associated with penetrating fixation, but there had been no US Food and Drug Administration-approved devices for nonpenetrating fixation in this context.

Methods

Patients undergoing laparoscopic transabdominal preperitoneal (TAP) or totally extraperitoneal (TEP) groin hernia repair with mesh at 1 of 5 academic medical centers were randomized to mesh (TAP/TEP) and peritoneal (TAP) fixation with NB2C adhesive or absorbable tacks. The primary outcome was improvement in pain (visual analog scale [VAS]) at 6 months. The noninferiority margin was 0.9 (α = 0.025; β = 80%). Recurrence, successful use of the device, quality of life, and rates of adverse events (AEs) were secondary outcomes.

Results

From 2019 to 2021, 284 patients were randomized to either NB2C adhesive or absorbable tacks (n = 142/142). Patient and hernia characteristics were comparable, and 65% were repaired using a TAP approach. The difference in VAS improvement at 6 months with NB2C adhesive was not inferior to absorbable tacks in intention-to-treat and per-protocol analyses, respectively (0.25 [95% CI, -0.33 to 0.82]; P = 0.013; 0.22 [95% CI, -0.36 to 0.80], noninferiority P = 0.011). There were no differences in secondary outcomes including recurrence, successful use of each device to fixate the mesh and peritoneum, quality of life, and additional VAS pain scores. Rates of adverse and serious AEs were also comparable.

Conclusions

NB2C adhesive is safe and effective for mesh fixation and peritoneal closure during laparoscopic groin hernia repair.

Perioperative Risk Factors for Persistent Postsurgical Pain After Inguinal Hernia Repair: Systematic Review and Meta-Analysis

Persistent postsurgical pain (PPSP) is one of the most bothersome and disabling long-term complications after inguinal hernia repair surgery. Understanding perioperative risk factors that contribute to PPSP can help identify high-risk patients and develop risk-mitigation approaches. The objective of this study was to systematically review and meta-analyze risk factors that contribute to PPSP after inguinal hernia repair. The literature search resulted in 303 papers included in this review, 140 of which were used for meta-analyses. Our results suggest that younger age, female sex, preoperative pain, recurrent hernia, postoperative complications, and postoperative pain are associated with a higher risk of PPSP. Laparoscopic techniques reduce the PPSP occurrence compared to anterior techniques such as Lichtenstein repair, and tissue-suture techniques such as Shouldice repair. The use of fibrin glue for mesh fixation was consistently associated with lower PPSP rates compared to tacks, staples, and sutures. Considerable variability was observed with PPSP assessment and reporting methodology in terms of study design, follow-up timing, clarity of pain definition, as well as pain intensity or interference threshold. High or moderate risk of bias in at least one domain was noted in >75% of studies. These may limit the generalizability of our results. Future studies should assess and report comprehensive preoperative and perioperative risk factors for PPSP adjusted for confounding factors, and develop risk-prediction models to drive stratified PPSP-mitigation trials and personalized clinical decision-making. PERSPECTIVE: This systematic review and meta-analysis summarizes the current evidence on risk factors for persistent pain after inguinal hernia repair. The findings can help identify patients at risk and test personalized risk-mitigation approaches to prevent pain. PROSPERO REGISTRATION: htttps://www.crd.york.ac.uk/prospero/display_record.php?RecordID=154663.

Assessment of Three Distinct Approaches to Postoperative Pain in Laparoscopic Inguinal Hernia Repair, a Randomized Prospective Study

Background: Contemporarily, transabdominal preperitoneal repair (TAPP) procedure in inguinal hernia treatment is counted among the routine minimal invasive general surgery practices. Increased patient's comfort, namely less postoperative pain, is considered to be its greatest advantage. However, pain following surgery can still be an important problem. Port site local anesthetic injection (PSLAI), iliohypogastric-/ilioinguinal nerve block (IINB), and preperitoneal local anesthetic spraying (PLAS) are relatively new techniques with sparse data to address this issue. Therefore, we conducted this prospective study to evaluate these three methods in patients who underwent TAPP for inguinal hernia repair. Methods: A total of 99 patients were enrolled and randomized equally into three groups. Every patient received a patient-controlled analgesia (PCA) device. PCA usage, total analgesic demands, and numerical rating scale values were recorded at 2, 6, 12, and 24 hours postoperatively (p.o). Results: Patients' demographic data (age, gender, BMI) did not reveal any significant difference between groups (P > .05). Procedure duration was found to be significantly longer in IINB group compared with others (p < .05). Number of PCA usages, total analgesic demand, additional analgesic requirement did not differ significantly between groups at 24-hour p.o (P > .05). PLAS group was found to have less average NSR score compared with other groups at 24 hours p.o (p < .05). Conclusions: All three procedures show promising outcomes with PLAS technique appearing to be slightly superior in terms of pain management in the immediate postoperative period. However, to reach a conclusion more randomized controlled trials covering various aspects and techniques of minimal invasive approach to inguinal hernia repair should be published.

Hernia 3D training model: a new inguinal hernia 3D-printed simulator

OBJECTIVE

Barros et al. demonstrated a 3D printed model that exhibits anatomical representativeness, low cost, and scalability. The model was created based on subtraction data obtained from computed tomography scans. Images were modeled and reconstructed in 3D to display the male inguinal region, typically viewed using a laparoscopic approach. To evaluate the functionality and quality of the anatomical representation of the hernia 3D training model.

METHODS

A model was created based on subtraction data derived from computed tomography scans of the pelvic bones and lumbar spine using the Blender 3.2.2 software program. Images were modeled and reconstructed in 3D to display the male inguinal region, typically viewed using a laparoscopic approach. Polylactic acid plastic was used to print the model. Some structures were made using ethylene vinyl acetate to enable possible material replacement and model reutilization. Thirty surgeons with various training levels were invited to use the model. Transabdominal inguinal hernioplasty was performed by simulating the same steps as those of a laparoscopic surgery, and the surgeons answered a questionnaire regarding the simulation.

RESULTS

Twenty-eight surgeons responded, seven of whom were experts in the treatment of abdominal wall hernias. The model was deemed easy to use, realistic, and anatomically precise, establishing it as a valuable supplement to minimally invasive surgery training.

CONCLUSION

The evaluation of this 3D model was favorable, as it accurately depicted the inguinal region anatomically, while also proving to be cost-effective for training purposes. The model could be a good option, particularly beneficial for training surgeons at the beginning of their careers.

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.

Suture repair versus mesh repair in elderly populations with incarcerated or strangulated groin hernia

Tension-free hernia repair is the gold standard for groin hernia repair. However, the optimal surgical treatment for incarcerated or strangulated groin hernia in elderly populations is controversial. The aim of this study is to compare the clinical efficacy of mesh repair and suture repair in the treatment of incarcerated or strangulated groin hernia in elderly patients. Patients ≥ 65 years who underwent urgent surgical repair for incarcerated or strangulated groin hernia from January 2012 to June 2022 were included. Patients' demographic data and postoperative outcomes were retrospectively analyzed. Patients with limited life expectancy were screened from the elderly population for subgroup analysis. A total of 103 patients (median age: 84 years old, range 65-96; mean follow-up time: 36.8 ± 24.8 months) were included, involving 42 cases in the suture repair group and 61 cases in the mesh repair group. Suture repair and mesh repair had similar lengths of ICU and hospital stay, and rates of small bowel resection, chronic pain, surgical site infection, and surgical-related death. However, suture repair had a significantly higher recurrence rate than mesh repair (7% vs. 2%, P = 0.04). In our subgroup analysis, for patients with limited life expectancy (41 patients; median age: 88 years old, range: 80-96), suture repair had no statistical difference in postoperative outcomes compared with mesh repair. Mesh repair is suitable for elderly patients with acutely incarcerated or strangulated groin hernias. However, for elderly patients with limited life expectancy, suture repair and mesh repair showed similar clinical outcomes.

The Impact of a Specialized Hernia Center and Standardized Practices on Surgical Outcomes in Hernia Surgery: A Systematic Review and Meta-Analysis

Aim: Hernia registries report that guidelines are not always implemented by general surgeons and suggest that the success rate of this procedure is higher in hernia specialty centers. There are many definitions of hernia centers, but their objectives consist of improving healthcare by homogenizing the clinical practice. We performed a systematic review and meta-analysis to analyze hernia centers' definitions and compare hernia centers with non-specialized centers. Material and Methods: Cochrane Central, Scopus, Scielo, and PubMed were systematically searched for studies defining a hernia center or comparing hernia centers and non-specialized centers. Outcomes assessed were recurrence, surgical site events, hospital length of stay (LOS), and operative time. We performed subgroup analyses of hernia type. Statistical analysis was performed with R Studio. Results: 3,260 studies were screened and 88 were thoroughly reviewed. Thirteen studies were included. Five studies defined a hernia center and eight studies, comprising 141,366 patients, compared a hernia center with a non-specialized center. Generally, the definitions were similar in decision-making and educational requirements but differed in structural aspects and the steps required for the certification. We found lower recurrence rates for hernia centers for both inguinal (1.08% versus 5.11%; RR 0.21; 95% CI 0.19 to 0.23; p < 0.001) and ventral hernia (3.2% vs. 8.9%; RR 0.425; 95% CI 0.28 to 0.64; p < 0.001). Hernia centers also presented lower surgical site infection for both ventral (4.3% vs. 11.9%; RR 0.435; 95% CI 0.21 to 0.90; p = 0.026) and inguinal (0.1% vs. 0.52%; RR 0.15; 95% CI 0.02 to 0.99; p = 0.49) repair. Conclusion: Our systematic review and meta-analysis support that a hernia center establishment improves postoperative outcomes data. Systematic Review Registration: https://www.crd.york.ac.uk/prospero/display_record.php?ID=CRD42024522263, PROSPERO CRD42024522263.

Prospective comparison of two surgical approaches for incarcerated and strangulated inguinal hernia: preperitoneal hernioplasty through the lower abdominal median incision and laparoscope (TAPP)

The optimal surgical approach of incarcerated and strangulated inguinal hernia is controversial. Retrospective studies showed that surgical approaches through lower abdominal median incision or laparoscopic are superior to the oblique inguinal incision, respectively. Whether transabdominal laparoscopic approach is superior to the lower abdominal median incision approach needs prospective research.Prospective comparative study of patients with incarcerated and strangulated groin hernia admitted to Jinshan hospital for emergency surgery from January 2018 to June 2022. They were divided into two groups according to different surgical approach. The open preperitoneal repair group (OPR) was operated through the lower abdominal median incision. Laparoscopic preperitoneal repair group (TAPP) was completed under transabdominal laparoscope. The perioperative complications and long-term results of the two groups were compared and analyzed. Eighty-two patients met the inclusion criteria, 40 in OPR group and 42 in TAPP group. Baseline data of the two groups were comparable. Thirteen cases (15.9%) of the two groups underwent intestinal resection and anastomosis. Seventy cases (90.2%) underwent the 1st stage mesh repair, including 5 cases of preperitoneal hernioplasty after intestinal resection. The average operation time of TAPP group was 13 min longer (60.7 ± 13.7 min vs 47.8 ± 19.8 min P < 0.001), and the visual analogue scale pain score at 24 h after operation was lower (3.5 ± 1.2 vs 4.4 ± 1.7 P = 0.019) than that of OPR group. There was 1 case of bladder injury (2.5%) in OPR group and 1 case of inferior abdominal artery injury (2.4%) in TAPP group. There was no difference in the rate of the 1st stage hernioplasty between the two groups. In OPR group, 2 cases (5%) extended the incision for more than 2 cm, while in TAPP group, 1 case (2.4%) converted to laparotomy. The time of hospital stay (3.2 ± 1.8 d vs 4.3 ± 2.7 d, P = 0.036) and return to normal activities (7.9 ± 2.7 d vs 11.0 ± 4.4 d, P < 0.001) were shorter in TAPP group. The rate of total postoperative complications including chronic pain, surgical-site infection, seroma, hernia recurrence and so on was 11.9% in TAPP group, which was not significantly different from 25% in OPR group (P = 0.212). There were no cases of mesh related infection and death within 30 days in both groups.TAPP is safe and feasible for the operation of acute incarcerated inguinal hernia. TAPP had better comfort and faster recovery over open preperitoneal repair for the appropriate patients with incarcerated/strangulated inguinal hernia, which can reduce acute pain, shorten hospital stay and return to normal activities earlier.

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.

Transabdominal pre-peritoneal (TAPP) versus totally extraperitoneal (TEP) laparoscopic techniques for inguinal hernia repair

BACKGROUND

An inguinal hernia occurs when part of the intestine protrudes through the abdominal muscles. In adults, this common condition is much more likely in men than in women. Inguinal hernia can be monitored by 'watchful waiting', but if symptoms persist or worsen, surgery is usually required, which can be open or laparoscopic. Laparoscopic (keyhole) repair of inguinal hernias in adults is generally performed using either the transabdominal preperitoneal (TAPP) or the totally extraperitoneal (TEP) method. Both methods include the use of mesh placed in front of the peritoneal lining of the abdominal wall, but for the TAPP technique, the abdominal cavity needs to be entered to place the mesh, and for the TEP technique, the whole procedure is done on the outside of the peritoneal lining of the abdominall wall. Whether one method is superior to the other has not been established, and there is debate about their relative benefits and harms. An advantage of TEP is its avoidance of the abdominal cavity; the downside is that it requires a steeper learning curve for clinicians. TAPP is considered simpler and makes it possible to inspect the contralateral side, but TAPP may have a higher risk of visceral injury compared to TEP. This is an update of a Cochrane review first published in 2005.

OBJECTIVES

To compare the benefits and harms of laparoscopic TAPP technique versus laparoscopic TEP technique for inguinal hernia repair in adults.

SEARCH METHODS

On 25 October 2022, the authors searched the Cochrane Central Register of Controlled Trials (CENTRAL) in the Cochrane Library; Ovid MEDLINE(R) Epub Ahead of Print, In-Process & Other Non-Indexed Citations, Ovid MEDLINE(R) Daily, and Ovid MEDLINE(R); and Ovid Embase, for published randomised controlled trials. To identify studies in progress, we searched ClinicalTrials.gov and the WHO International Clinical Trial Registry Platform (ICTRP).

SELECTION CRITERIA

All prospective randomised, quasi-randomised, and cluster-randomised trials that compared the laparoscopic TAPP technique with the laparoscopic TEP technique for inguinal hernia repair in adults were eligible for inclusion. We included studies that involved a mix of different types of groin hernia if we could extract data for the inguinal hernias. Studies may have also included a group of participants receiving hernia repair by open surgery, but these groups were not included in our review.

DATA COLLECTION AND ANALYSIS

Both review authors independently evaluated trial eligibility, extracted data from included studies, and assessed the risk of bias in the included studies. The review's primary outcomes were serious adverse events, chronic pain (persisting for at least six months after surgery), and hernia recurrence. We also assessed a variety of secondary outcomes at perioperative, early postoperative, and late postoperative time points. We performed statistical analyses using the random-effects model, and expressed the results as odds ratios (ORs) for dichotomous outcomes and mean differences (MDs) for continuous outcomes, with their respective 95% confidence intervals (CIs). We used GRADE to assess the certainty of evidence for key outcomes as high, moderate, low or very low.

MAIN RESULTS

We included 23 studies in this review update, which randomised 1156 people to TAPP and 1110 people to TEP, all requiring repair of inguinal hernias. Study sample sizes varied from 40 to 316 participants. The vast majority of study participants were male. We judged most studies to be at 'high' or 'unclear' risk of bias. Our judgements of the certainty of the evidence were low or very low for all outcomes we assessed. There may be little to no difference between TAPP and TEP laparoscopic techniques for serious adverse events (0.4% versus 0.7%; OR 0.58, 95% CI 0.15 to 2.32, P = 0.45, I2 = 0%; 19 studies, 1735 participants; low certainty of evidence); and hernia recurrence (1.2% versus 1.1%; OR 1.14, 95% CI 0.49 to 2.62, P = 0.97, I2 = 0%; 17 studies, 1712 participants; low certainty of evidence). The evidence is very uncertain about the effects of TAPP versus TEP techniques on chronic pain (OR 0.62, 95% CI 0.20 to 1.97, P = 0.68, I2 = 0%; 6 studies, 860 participants; very low certainty of evidence). In terms of secondary outcomes, the evidence is very uncertain for TAPP versus TEP techniques for perioperative visceral and vascular injury (15 studies, 1523 participants; very low certainty of evidence), and for haematoma or seroma during the early (≤ 30 days) postoperative phase (OR 0.86, 95% CI 0.54 to 1.37, P = 0.3861, I2 = 0%; 15 studies, 1423 participants; very low certainty of evidence). TEP technique may carry a higher risk of conversion to another hernia repair method (either TAPP technique or open surgery) when compared to TAPP (2.5% versus 0.7%; OR 0.28, 95% CI 0.09 to 0.84, P = 0.02, I2 = 0%; 13 studies, 1178 participants; low certainty of evidence). Only two studies (474 participants) reported quality of life in the late (> 30 days) postoperative phase; overall, there was an improvement in quality of life from the pre- to post-operative assessment, but the evidence suggests little to no difference between the techniques (low certainty of evidence).

AUTHORS' CONCLUSIONS

This review update found that there may be little to no difference between the TAPP and TEP techniques for serious adverse events, hernia recurrence, or chronic pain (low- to very-low-certainty evidence). Decisions about which method to use will most likely reflect surgeon and patient preference until high-certainty evidence becomes available. There may be a higher risk of needing to convert from TEP to TAPP or open surgery when compared to the risk of needing to convert from TAPP to open surgery (low-certainty evidence). If surgeons opt for TEP as their standard laparoscopic method, they could consider having a strategy for how to handle the potential need for conversion. This might include proficiency in the TAPP approach or having informed the patient about the risk of conversion to open surgery. For surgeons or surgical departments, the choice of a laparoscopic technique should involve shared decision-making with patients and their families or carers. Future research could focus on patient-reported outcomes, such as quality of life.

Non-mesh inguinal hernia repair: Review

Hernioplasty stands as one of the most common abdominal surgical interventions. The "gold standard" treatment for inguinal hernias remains Lichtenstein mesh hernioplasty. Nonetheless, clinical practice continues to grapple with issues concerning complications such as recurrence, chronic postoperative pain, and infection. The myriad types of surgery lead to conflicting opinions regarding the superiority and drawbacks of inguinal canal plastic surgery methods. This article presents current data on the surgical treatment of non-mesh inguinal hernias, delineating the most prevalent techniques while exploring their respective advantages and disadvantages. Additionally, the researchers' experiences are analyzed in detail.

QUALITY OF LIFE USING EURAHS-QoL SCORES AFTER SURGICAL TREATMENT OF INGUINAL HERNIA: LAPAROSCOPIC TRANSABDOMINAL PREPERITONEAL (TAPP) AND LICHTENSTEIN TECHNIQUES

BACKGROUND

Results on quality of life after inguinal hernia surgery, such as esthetics, postoperative pain, period of absence from activities, and recurrence are a relevant topic since inguinal hernia affects 27% of men and 3% of women at some point in their lives, and should guide health policies to allocate resources more efficiently.

AIMS

To evaluate the quality of life in the late postoperative period of inguinal herniorrhaphy regarding recurrence, pain, esthetics, and restriction in activities, comparing the minimally invasive techniques - the transabdominal preperitoneal (TAPP) and the conventional Lichtenstein.

METHODS

A cross-sectional observational clinical study was conducted with the EuraHS-QoL questionnaire validated and translated into Portuguese, applied to patients after an average of 65 months postoperatively. Forty-five patients were assessed, 28 undergoing Lichtenstein and 17 undergoing TAPP. All were males aged between 18 and 87 years with a primary unilateral inguinal hernia. Recurrent or bilateral hernias, other concomitant abdominal wall hernias, patients who chose not to participate or who were not found, and female patients were excluded from the study.

RESULTS

Regarding the domains pain, restriction, and esthetics, there was no difference between the two groups when examining quality of life. Neither group presented recurrence in the studied period.

CONCLUSIONS

Both TAPP and Lichtenstein techniques presented similar results concerning quality of life when compared in the long-term.

Trends in minimally invasive and open inguinal hernia repair: an analysis of ACGME general surgery case logs

BACKGROUND

Groin hernia repair is one of the most commonly performed surgical procedures and is often performed by surgical interns and junior residents. While traditionally performed open, minimally invasive (MIS) groin hernia repair has become an increasingly popular approach. The purpose of this study was to determine the trends in MIS and open inguinal and femoral hernia repair in general surgery residency training over the past two decades.

METHODS

Accreditation Council for Graduate Medical Education (ACGME) national case log data of general surgery residents from 1999 through 2022 were reviewed. We collected means and standard deviations of open and MIS inguinal and femoral hernia repairs. Linear regression and ANOVA were used to identify trends in the average annual number of open and MIS hernia repairs logged by residents. Cases were distinguished between level of resident trainees: surgeon-chief (SC) and surgeon-junior (SJ).

RESULTS

From July 1999 to June 2022, the average annual MIS inguinal and femoral hernia repairs logged by general surgery residents significantly increased, from 7.6 to 47.9 cases (p < 0.001), and the average annual open inguinal and femoral hernia repairs logged by general surgery residents significantly decreased, from 51.9 to 39.7 cases (p < 0.001). SJ resident results were consistent with this overall trend. For SC residents, the volume of both MIS and open hernia repairs significantly increased (p < 0.001).

CONCLUSIONS

ACGME case log data indicates a trend of general surgery residents logging overall fewer numbers of open inguinal and femoral hernia repairs, and a larger proportion of open repairs by chief residents. This trend warrants attention and further study as it may represent a skill or knowledge gap with significant impact of surgical training.

Comparing Robot-Assisted and Laparoscopic Inguinal Hernia Repair: A Systematic Review and Meta-Analysis

Inguinal hernia repair is a common surgical intervention. Advancements in minimally invasive techniques, specifically laparoscopic (LR) and robot-assisted (RR) approaches, have reshaped the landscape of surgical options. This meta-analysis aimed to systematically assess and compare the effectiveness and safety of laparoscopic and robot-assisted inguinal hernia repair through a comprehensive review of the literature. A systematic search of databases was conducted to identify relevant studies published up to November 30, 2023. Fifteen studies, encompassing a total of 64,568 participants, met the inclusion criteria. Pooled estimates for key outcomes, including duration of operation, overall complications, and surgical site infection (SSI), were calculated using random-effects models. This meta-analysis revealed a statistically significant difference in the duration of surgery, favoring laparoscopic repair over robot-assisted techniques (mean difference: 26.85 minutes, 95% CI (1.16, 52.54)). Overall complications did not significantly differ between the two approaches (odds ratio: 1.54, 95% CI (0.83, 2.85)). However, a significantly greater risk of SSI was identified for robot-assisted procedures (odds ratio: 3.32, 95% CI (2.63, 4.19)). This meta-analysis provides insights into the comparative effectiveness of laparoscopic and robot-assisted inguinal hernia repair. While laparoscopy has shorter operative times and comparable overall complication rates, the increased risk of SSI during robot-assisted procedures necessitates careful consideration in clinical decision-making. Surgeons and healthcare providers should weigh these findings according to patient characteristics, emphasizing a personalized approach to surgical decision-making. The evolving landscape of inguinal hernia repair warrants ongoing research to refine techniques and optimize outcomes for the benefit of patients undergoing these procedures.

Temporal patterns for inguinal hernia recurrence operations after Shouldice Repair

PURPOSE

Shouldice Repair for inguinal hernias results in a low recurrence rate; however, little is known about the risk factors for these relapses. In the present study, we reviewed all patient's undergoing a reoperation for recurrence after a primary Shouldice Repair.

METHODS

Patients undergoing recurrent inguinal hernia repair from 2013 to 2017 were identified. The subgroup of patients with the first recurrence after a Shouldice Repair at this institution was selected and included. Data collection from the index and the reoperation surgery were performed, as well as statistical analysis.

RESULTS

A total of 125 patients were included in the analysis. The mean age was 50.8 ± 13.9 (body mass index: 24.6 ± 2.6 kg/m2), 97% were male. The most common interval for a recurrence reoperation was in the first 5 years following the initial surgery (37.6% of patients; mode: 1 year; median: 7 years; mean: 13.7 ± 13.8 years). A temporal median pattern for recurrence reoperation according to age interval was noted (patients < 41 years old: 20 years; patients aged 41-60 years old: 10 years and patients > 61 years: 2 years)).

CONCLUSION

Patients undergoing reoperations for recurrent inguinal hernias after a primary Shouldice Repair presented a pattern of temporal recurrence according to age. Older patients present with earlier recurrences than younger ones, an important consideration in the assessment of patients postoperatively.

Current trends and outcomes for unilateral groin hernia repairs in the United States using the Abdominal Core Health Quality Collaborative database: A multicenter propensity score matching analysis of 30-day and 1-year outcomes

BACKGROUND

Different unilateral groin hernia repair approaches have been developed in the last 2 decades. The most commonly done approaches are open inguinal hernia repair by the Lichenstein technique, laparoscopic approach by either total extraperitoneal or transabdominal preperitoneal, and robotic transabdominal preperitoneal approach. Hence, this study aimed to compare early and late postoperative outcomes in patients who underwent unilateral robotic transabdominal preperitoneal, laparoscopic transabdominal preperitoneal, and laparoscopic total extraperitoneal, and open groin hernia repair using a United States national hernia database, the Abdominal Core Health Quality Collaborative Database.

METHODS

Prospectively collected data from the Abdominal Core Health Quality Collaborative database was retrospectively reviewed, including all adult patients who underwent elective unilateral groin hernia repair from 2015 to 2022, with a 1:1 propensity score match analysis conducted for balanced groups. The univariate analysis compared the groups across the preoperative, intraoperative, and postoperative timeframes.

RESULTS

The Abdominal Core Health Quality Collaborative database identified 14,320 patients who underwent elective unilateral groin hernia repair and had documented 30 days of follow-up. Propensity score matching stratified 1,598 patients to each group (total of 6,392). The median age was 64 years (interquartile range 53-74) for open groin hernia repair, whereas 60 (interquartile range 47-69) for laparoscopic transabdominal preperitoneal, 62 (interquartile range 48-70) for laparoscopic total extraperitoneal, and 60 (interquartile range 47-70) for robotic transabdominal preperitoneal were noted. Open groin hernia repair had more American Society of Anesthesiologists score 4 (52, 3%) patients (P < .001). A painful bulge was the most common indication (>85%). Operating room time >2 hours was more significant in the robotic transabdominal preperitoneal group (123, 8%; P < .001). Seroma rate was higher in the laparoscopic transabdominal preperitoneal (134, 8%; P < .001). A 1-year analysis had 1,103 patients. Hematoma, surgical site infection, readmission, reoperation, and hernia recurrence at 30 days or 1 year did not differ, with an overall recurrence rate of 6% (n = 67) at 1 year (P = .33). In patients with body mass index ≥30 kg/m2, the robotic approach had lower rates of surgical site occurrence (n = 12, 4%; P = .002) and seroma (n = 5, 2%; P < .001) compared with the other groups. When evaluating recurrence 1 year after surgery, the robotic transabdominal preperitoneal group had 10% versus 18% open groin hernia repair, 11% laparoscopic transabdominal preperitoneal, and 18% laparoscopic total extraperitoneal, but it was not statistically significant (P = .53).

CONCLUSION

There was no difference in readmission, reoperation, and surgical site infection among the surgical techniques at 30 days. However, laparoscopic transabdominal preperitoneal was associated with more seromas. Hernia recurrence at 1 year was similar across groups; the robotic approach had the lowest recurrence rate among all 3 repairs but did not reach statistical significance. The robotic approach performed better in patients with a body mass index of 30 kg/m2 for surgical site occurrence and seroma than in other surgical techniques.

Ultra-micro instrument in laparoscopic transabdominal preperitoneal (TAPP) hernioplasty

This study aimed to explore the feasibility of ultra-micro instruments in the laparoscopic repair of inguinal indirect hernia. This retrospective study included 83 patients with an indirect inguinal hernia who underwent elective surgery from January 2020 to December 2021. All patients were divided into the traditional laparoscopic group and ultra-micro laparoscopic group. The data on operation time, blood loss, ventilation time, hospital stays, complication, postoperative pain degree was collected and compared between the two groups. Of these 83 patients, 25 assigned to the ultra-micro group used ultra-micro instruments while 58 were assigned to the traditional group. The traditional group had a lower mean operation time (57.07 min) than the ultra-micro group (69.60 min) p < 0.05, while ultra-micro group patients had a shorter hospital stay (2 days) than the traditional group (3 days) p < 0.05. The ultra-micro group experienced significantly less pain for 6 h, 1 day, and 2 days postoperatively (2, 1, 0 points) compared to the traditional group (4, 2, 1 points) p < 0.05. There was no significant difference in blood loss, ventilation time, or complication between the two groups. Using ultra-micro instruments is safe and feasible. Patients have less postoperative pain and a smaller incision than the traditional laparoscopic instrument. It is worthy of clinical promotion.

Laparoscopic versus robotic TAPP/TEP inguinal hernia repair: a multicenter, propensity score weighted study

PURPOSE

The objective of this retrospective study was to assess safety and comparative clinical effectiveness of laparoscopic inguinal hernia repair (LIHR) and robot-assisted inguinal hernia repair (RIHR) from multi-institutional experience in Taiwan.

METHODS

Medical records from a total of eight hospitals were retrospectively collected and analyzed. Patients primarily diagnosed of inguinal hernia, recurrent inguinal hernia or incarceration groin hernia patients who either underwent laparoscopic or robot-assisted inguinal hernia repair between January 2018 and December 2022 were included in the study. Baseline characteristics, intra-operative and post-operative results were analyzed. To compare two cohorts, overlap weighting was employed to balance the significant inter-group differences. We also conducted subgroup analyses by state of a hernia (primary or recurrent/incarceration) and laterality (unilateral or bilateral) that indicated complexity of surgery.

RESULTS

A total of 1,080 patients who underwent minimally invasive inguinal hernia repair from 8 hospitals across Taiwan were collected. Following the application of inclusion criteria, there were 279 patients received RIHR and 763 patients received LIHR. In the baseline analysis, RIHR was more often performed in recurrent/incarceration (RIHR 18.6% vs LIHR 10.3%, p = 0.001) and bilateral cases (RIHR 81.4 vs LIHR 58.3, p < 0.001). Suturing was dominant mesh fixation method in RIHR (RIHR 81% vs LIHR 35.8%, p < 0.001). More overweight patients were treated with RIHR (RIHR 58.8% vs LIHR 48.9%, p = 0.006). After overlap weighting, there were no significant difference in intraoperative and post-operative complications between RIHR and LIHR. Reoperation and prescription rates of pain medication (opioid) were significantly lower in RIHR than LIHR in overall group comparison (reoperation: RIHR 0% vs. LIHR 2.9%, p = 0.016) (Opioid prescription: RIHR 3.34 mg vs LIHR 10.82 mg, p = 0.001) while operation time was significantly longer in RIHR (OR time: RIHR 155.27 min vs LIHR 95.30 min, p < 0.001).

CONCLUSIONS

This real-world experience suggested that RIHR is a safe, and feasible option with comparable intra-operative and post-operative outcomes to LHIR. In our study, RIHR showed technical advantages in more complicated hernia cases with yielding to lower reoperation rates, and less opioid use.

Laparoscopic Management of Inguinal Hernia: A Systematic Review and Updated Network Meta-Analysis of Randomized Controlled Trials

Various surgical approaches for inguinal hernia repair have been outlined in medical literature. In most cases, these lesions are repaired by general surgeons. A variety of surgical techniques for the treatment of inguinal hernias have been documented in the medical literature. In 2018, the European Hernia Society (EHS) recommended laparo-endoscopic repair as a preferred approach for adults. This method involves a combination of laparoscopic and endoscopic techniques for hernia repair. The goal of this systematic review is to conduct a thorough examination of the total extraperitoneal vs. transabdominal preperitoneal comparison in inguinal hernia repair, with an emphasis on randomized controlled trials (RCTs). It also intends to conduct a trial sequential analysis (TSA) in order to determine whether more trials and investigations are required or whether there is sufficient evidence to draw a firm conclusion. The study's systematic review and meta-analysis were carried out in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. We used the PubMed and Google Scholar databases to conduct a thorough web search for articles published between January 2019 and December 2023. The meta-analysis was carried out using Resource Manager Revman version 5.4.1 (Revman International, Inc., New York City, New York). After a review of the studies was done, ten studies were selected to be used in conducting the systematic review and meta-analysis. The recurrence rate of TEP treatment was found to be slightly lower than transabdominal preperitoneal (TAPP). The two techniques did not differ in terms of postoperative complications; however, TEP had a marginally lower rate of postoperative pain. Further, the study revealed that there was a decreased risk of wound infections, seromas, and hematomas with total extraperitoneal (TEP) as opposed to transabdominal preperitoneal (TAPP). TEP also reduced the amount of recovery time needed. After conducting successful hernia treatments, total extraperitoneal and transabdominal preperitoneal both had low rates of complications and recurrence. Based on the information obtained from the study analysis, this meta-analysis provides evidence for the efficacy of TAPP and TEP techniques in the management of inguinal hernias. Though there was a statistically significant difference while applying both methods in the treatment of hernia (p=0.001), TEPs have been shown to have a lower recurrence rate than TAPPs. Similarly, the TEP method has been revealed to have a slight reduction in postoperative pain compared to transabdominal preperitoneal. However, the two techniques have been shown to have no significant difference in postoperative complications. Further, laparoscopic procedures have proved to be a little bit safer and more effective than open procedures. This has been shown by reduced risk of wound infection, hematoma, seroma, and decreased sensibility while using this method. It accelerated the healing process as well. Thus, depending on the needs of the patients and the experience level of the surgeons responsible for the treatments, inguinal hernias can be repaired using either transabdominal preperitoneal or total extraperitoneal techniques since both treatment techniques have generally minimal chance of complications or recurrence as both have proved to safer method.

Quantitative somatosensory assessments in patients with persistent pain following groin hernia repair: A systematic review with a meta-analytical approach

OBJECTIVES

Quantitative sensory testing (QST) provides an assessment of cutaneous and deep tissue sensitivity and pain perception under normal and pathological settings. Approximately 2-4% of individuals undergoing groin hernia repair (GHR) develop severe persistent postsurgical pain (PPSP). The aims of this systematic review of PPSP-patients were (1) to retrieve and methodologically characterize the available QST literature and (2) to explore the role of QST in understanding mechanisms underlying PPSP following GHR.

METHODS

A systematic literature search was conducted from JAN-1992 to SEP-2022 in PubMed, EMBASE, and Google Scholar. For inclusion, studies had to report at least one QST-modality in patients with PPSP. Risk of bias assessment of the studies was conducted utilizing the Newcastle Ottawa Scale and Cochrane's Risk of Bias assessment tool 2.0. The review provided both a qualitative and quantitative analysis of the results. A random effects model was used for meta-analysis.

RESULTS

Twenty-five studies were included (5 randomized controlled trials, 20 non-randomized controlled trials). Overall, risk of bias was low. Compared with the contralateral side or controls, there were significant alterations in somatosensory function of the surgical site in PPSP-patients. Following thresholds were significantly increased: mechanical detection thresholds for punctate stimuli (mean difference (95% CI) 3.3 (1.6, 6.9) mN (P = 0.002)), warmth detection thresholds (3.2 (1.6, 4.7) °C (P = 0.0001)), cool detection thresholds (-3.2 (-4.9, -1.6) °C (P = 0.0001)), and heat pain thresholds (1.9 (1.1, 2.7) °C (P = 0.00001)). However, the pressure pain thresholds were significantly decreased (-76 (-123, -30) kPa (P = 0.001)).

CONCLUSION

Our review demonstrates a plethora of methods used regarding outcome assessments, data processing, and data interpretation. From a pathophysiological perspective, the most consistent findings were postsurgical cutaneous deafferentation and development of a pain generator in deeper connective tissues.

TRIAL REGISTRATION

CRD42022331750.

Single-incision laparoscopic transabdominal preperitoneal repair in the treatment of adult female patients with inguinal hernia

BACKGROUND

Women have a 3% lifetime chance of developing an inguinal hernia, which is not as common in men. Due to its cosmetic benefits, single-incision laparoscopic transabdominal preperitoneal (SIL-TAPP) inguinal hernia repair is becoming increasingly popular in the management of inguinal hernia in women. However, there are no studies comparing the safety and applicability of SIL-TAPP repair with conventional laparoscopic transabdominal preperitoneal (CL-TAPP) inguinal hernia repair for the treatment of inguinal hernia in women.

AIM

To compare the outcomes of SIL-TAPP and CL-TAPP repair in adult female patients with inguinal hernia and to estimate the safety and applicability of SIL-TAPP repair in adult female inguinal hernia patients.

METHODS

We retrospectively compared the clinical information and follow-up data of female inguinal hernia patients who underwent SIL-TAPP inguinal hernia repair and those who underwent CL-TAPP inguinal hernia repair at the Affiliated Hospital of Nantong University from February 2018 to December 2020 and assessed the long-term and short-term outcomes of both cohorts.

RESULTS

This study included 123 patients, with 71 undergoing SIL-TAPP repair and 52 undergoing CL-TAPP repair. The two cohorts of patients and inguinal hernia characteristics were similar, with no statistically meaningful difference. The rate of intraoperative inferior epigastric vessel injury was lower in patients in the SIL-TAPP cohort (0, 0%) than in patients in the CL-TAPP cohort (4, 7.7%) and was significantly different (P < 0.05). In addition, the median [interquartile range (IQR)] total hospitalization costs were significantly lower in patients in the SIL-TAPP cohort [$3287 (3218-3325)] than in patients in the CL-TAPP cohort [$3511 (3491-3599)]. Postoperatively, the occurrence rate of trocar site hernia was lower in the SIL-TAPP cohort (0, 0%) than in the CL-TAPP cohort (4, 7.7%), and the median (IQR) cosmetic score was significantly higher in the SIL-TAPP cohort [10 (10-10)] than in the CL-TAPP cohort [9 (9-10)].

CONCLUSION

SIL-TAPP repair did not increase the incidence of intraoperative and postoperative complications in female inguinal hernia patients. Moreover, female inguinal hernia patients who underwent SIL-TAPP repair had a lower probability of trocar site hernia and inferior epigastric vessel injury than female inguinal hernia patients who underwent CL-TAPP repair. In addition, female inguinal hernia patients who underwent SIL-TAPP repair reported a more aesthetically pleasing postoperative abdominal incision. Therefore, SIL-TAPP repair is a better option for the treatment of inguinal hernias in women.

Mapping the landscape of research on insulin resistance: a visualization analysis of randomized clinical trials

BACKGROUND

Insulin resistance, a condition in which cells do not respond adequately to insulin, plays a crucial role in diabetes and related metabolic disorders. Randomized clinical trials (RCTs) explore interventions to manage insulin resistance, contributing to evidence-based medical progress. The current study aimed to analyze the global research landscape and trends in RCTs targeting insulin resistance.

METHODS

This study used bibliometric analysis and data visualization to examine RCT publications on insulin resistance from 2003 to 2022. The Scopus database was used due to its comprehensive coverage. The search strategy involved combining terms related to insulin resistance with RCT-related terms. The search query was validated, and core bibliometric indicators were used to analyze publication growth, origin, productivity, quality, and citations.

RESULTS

Between 2003 and 2022, 1077 RCT-focused publications on insulin resistance were identified from a pool of 24,932 related articles. The growth followed two phases, with a significant increase after 2008. The USA (n = 308; 28.60%), Iran (n = 165; 15.32%), China (n = 110; 10.21%), and the UK (n = 92; 8.54%) were the main contributors. The active institutions included Tehran University of Medical Sciences (n = 38; 3.53%) and Harvard Medical School (n = 31; 2.88%). Prominent funding agencies include the National Institutes of Health (n = 88; 8.17%) and the National Institute of Diabetes and Digestive and Kidney Diseases (n = 86; 7.99%). The top journals included the American Journal of Clinical Nutrition (n = 44; 4.09%) and Diabetes Care (n = 35; 3.25%). Co-occurrence analysis revealed three clusters addressing "utilizing lipid panels as indicators of insulin resistance," "analyzing the impact of diet composition and physical activity on insulin sensitivity among obese individuals," and "exploring insulin resistance in cases of polycystic ovary syndrome."

CONCLUSIONS

This comprehensive bibliometric analysis highlights the global research landscape and trends in RCTs targeting insulin resistance. Research on lipid panels, diet impact, and insulin resistance in patients with polycystic ovary syndrome will continue to be a hotspot. The findings offer valuable information on research priorities, international collaborations, and impactful publications. This study provides a foundation for future directorial investigations in this critical area of metabolic health.

Pre-peritoneal Fat as a Guide to Extended View Total Extraperitoneal (eTEP) Repair for Inguinal Hernia

In the extra-peritoneal approach for inguinal hernias, pre-peritoneal space creation is one of the most crucial steps. In the absence of well-defined landmarks, it is difficult to identify the correct plane of dissection, and blind dissection can sometimes lead to peritoneal injury, resulting in loss of working space. In this article, we describe our technique of pre-peritoneal space creation by following the fatty tissue of the median umbilical ligament and fatty tissue along the rectus muscle. The data of all patients (total 84) who underwent surgery with this technique between January 2021 and May 2023 were retrieved and assessed for demographics, hernia type, and perioperative complications. Except for two peritoneal injuries, there were no other intraoperative complications.

Comparison of modified tumescent and conventional laparoscopic transabdominal preperitoneal inguinal hernia repair: a retrospective clinical study

OBJECTIVE

Laparoscopic transabdominal preperitoneal (TAPP) inguinal hernia repair poses certain challenges to less experienced surgeons. This study was performed to compare the clinical outcomes of modified tumescent laparoscopic TAPP (MT-TAPP) inguinal hernia repair versus conventional laparoscopic TAPP (CL-TAPP) inguinal hernia repair.

METHODS

We retrospectively analyzed the perioperative data of patients with inguinal hernias who underwent either MT-TAPP repair (n = 57) or CL-TAPP repair (n = 54) at the General Surgery Department of Nanjing Yimin Hospital from November 2019 to June 2023.

RESULTS

The durations of the total operation and the preperitoneal space dissection were shorter in the MT-TAPP than CL-TAPP group. The estimated blood loss volume was lower in the MT-TAPP than CL-TAPP group. The visual analogue scale scores recorded at the 12- and 24-hour postoperative time points showed significantly greater reductions in the MT-TAPP than CL-TAPP group.

CONCLUSIONS

Using liquid injection and gauze dissection is both safe and practical. This technique results in a shortened total operation time, less time spent on preperitoneal space dissection, decreased estimated blood loss, and less severe postoperative pain.

Laparoscopic Inguinal Hernia Repair and Synchronous Peritoneal Dialysis Catheter Placement: A Single-Center Experience

Background: Peritoneal dialysis (PD) is a common method for treating end-stage renal disease (ESRD). Occurrence of inguinal hernia before and during PD is considered to be the main cause of treatment discontinuation, failure, and conversion to hemodialysis. In this study, we present a single-center experience about laparoscopic inguinal hernia repair and synchronous PD catheter placement and evaluated the feasibility and outcomes. Methods: During May 2018 to May 2022, a total of 216 consecutive patients with ESRD underwent laparoscopic PD catheter placement. Among them, 41 patients (27.7%) with coexistent inguinal hernia were included in this study. Individual information, complications, recurrent and new-onset hernias, and catheter survival were retrospectively analyzed. Results: Forty-one patients underwent laparoscopic inguinal hernia repair and synchronous PD catheter placement, 9 patients had bilateral inguinal hernia, and another 32 patients had unilateral inguinal hernia. The mean age was 46.49 years (range, 28-72 years), including 39 males and 2 females. There was no recurrent hernia and only 1 patient (2.4%) developed incisional hernia (trocar site hernia) which required hernia repair and discontinuation of PD. No postoperative complications were observed, such as bleeding, infection, and dialysate leakage. After a median follow-up of 37 months (20-58 months), there were no deaths and 97.6% (40/41) catheters were still working. Conclusions: Laparoscopic hernia repair and synchronous PD catheter placement is an effective and safe treatment for ESRD patients with coexisting inguinal hernia in virtue of low postoperative complications and high catheter survival.

Efficacy and safety of mesh non-fixation in patients undergoing laparo-endoscopic repair of groin hernia: a systematic review and meta-analysis

PURPOSE

To examine updated evidence on the efficacy and safety of mesh non-fixation in patients undergoing laparo-endoscopic repair of groin hernias.

METHODS

We searched MEDLINE, Cochrane Central Library, Embase, ClinicalTrials. gov, and ICTRP databases to identify randomized controlled trials. The primary outcomes were recurrence, chronic pain, and return to daily life. The certainty of evidence (CoE) was assessed by grading recommendations, assessments, developments, and evaluations. We performed a subgroup analysis based on the surgical type. This study was registered with PROSPERO (CRD 42022368929).

RESULTS

We included 25 trials with 3,668 patients (4,038 hernias) were included. Mesh non-fixation resulted in little to no difference in hernia recurrence (relative risk [RR]:1.40, 95% confidence interval [CI]:0.59-3.31; I2 = 0%; moderate CoE) and chronic pain (RR:0.48, 95% CI:0.13-1.78; I2 = 77%; moderate CoE), but reduced return to daily life (mean difference [MD]: - 1.79 days, 95% CI: - 2.79 to -0.80; I2 = 96%; low CoE). In subgroup analyses, the transabdominal preperitoneal approach (TAPP) (MD: - 2.97 days, 95% CI: - 4.87 to - 1.08; I2 = 97%) reduced return to daily life than total extraperitoneal inguinal approach (MD: - 0.24 days, 95% CI - 0.71 to 0.24; I2 = 61%) (p = 0.006).

CONCLUSIONS

Mesh nonfixation improves the return to daily life without increasing the risk of hernia recurrence or chronic pain. Surgeons and patients may discuss mesh nonfixation options to accommodate a patient's desired return to daily life. Further trials focusing on TAPP are required to confirm these findings.

Laparoscopic Inguinal Hernia Repair in the Obese Patient Population: A Single-Center Five-Year Experience

Purpose The objective of the present study is to evaluate the distribution of the transabdominal preperitoneal (TAPP) and the totally extraperitoneal repair (TEP) procedures among the obese and non-obese patient populations, to show how obesity impacts daily practice by reviewing the experience of a single center, and finally, to assess the outcomes of the operations. Methods All patients who underwent elective, minimally invasive inguinal hernia repair in our hospital from January 2017 to January 2022 were included in the present study. The data that were analyzed were patient demographics, each individual patient's American Society of Anesthesiology (ASA) score, the minimally invasive technique (TAPP or TEP) utilized, the body mass index (BMI), and other comorbidities such as underlying diabetes, hypertension, and smoking status. Results A total of 109 patients were included in the present analysis, of which 81 (74.3%) underwent elective TEP repairs while 28 (25.7%) underwent elective TAPP repairs. Overall, 39 (35.7%) patients were included in the obesity subgroup with an average BMI of 35.4 ± 4.9, with a range from 30.1 to 52.7, and 70 (64.3%) were included in the non-obese subgroup, with an average BMI of 23.2 ± 3.3 and a range from 16.2 to 29.7. Conclusions The laparoscopic approach to the inguinal hernia repair in obese patients has similar outcomes as an open approach regarding the 30-day events, in the hands of experienced surgeons with the advantages of the laparoscopic approach vs. the open one.

The Minimally Invasive Inguinal Hernia: Current Trends and Considerations

Inguinal hernias are one of the most common surgical pathologies faced by the general surgeon in modern medicine. The cumulative incidence of an inguinal hernia is around 25% in men and 3% in women. The majority of inguinal hernias can be repaired minimally invasively, utilizing either robotic or laparoscopic approaches.

Impact of COVID-19 on clinical outcomes of robotic inguinal hernia repair

PURPOSE

To investigate the impact of the COVID-19 pandemic on the clinical impact of the clinical outcomes of robotic inguinal hernia repair.

METHODS

Patients who underwent RIHR 2 years before and after March 10, 2020, were included in this retrospective study and assigned accordingly to the pre- or post-COVID group. Pre-, intra-, and postoperative variables including patients' demographics, hernia characteristics, complications, and hernia recurrence rates were compared between groups.

RESULTS

183 (94.5% male) and 141 (96.4% male) patients were assigned to the pre- and post-COVID groups, respectively. Patient demographics and medical comorbidities did not differ between groups. Operative time was approximately 40 min longer in the post-COVID group (p < 0.001) with higher rates of bilateral IHR (pre-COVID: 30.1% vs. post-COVID: 46.4%, p = 0.003). Mesh material differed between groups with predominance of polyester mesh in the pre-COVID group vs. polypropylene in the post-COVID one. Median hospital length of stay (LOS) was 0 days in both groups, and same-day discharge rates were 93.4% pre-pandemic and 92.8% post-pandemic (p = 0.09). There were no pulmonary complications recorded in either group or no cases of COVID-19 detected within two weeks postoperatively in the post-COVID group. Seromas were more frequent in the post-COVID group (pre-COVID: 2 vs. post-COVID: 8, p = 0.018) and no hernia recurrences were recorded.

CONCLUSION

This is the first study to describe the impact of COVID-19 on RIHR. Clinical outcomes and hernia-specific complications were not impacted by the COVID-19 pandemic.

Single-incision laparoscopic transabdominal preperitoneal hernioplasty: 1,054 procedures and experience

PURPOSE

Although there have been numerous studies on single-incision laparoscopic inguinal hernia repair (SIL-IHR), the short- and long-term outcomes in patients from a large single institution who underwent single-incision laparoscopic transabdominal preperitoneal hernioplasty (SIL-TAPP) have rarely been reported. The purpose of this study is to evaluate the short- and long-term outcomes of SIL-TAPP and its safety and feasibility in patients from a large single institution.

METHODS

The details of 1,054 procedures in 966 patients who underwent SIL-TAPP at the Affiliated Hospital of Nantong University from January 2015 to October 2022 were retrospectively analysed. SIL-TAPP was performed completely through the umbilicus using conventional laparoscopic instruments. Short-term and long-term outcomes of SIL-TAPP were collected by outpatient and telephone follow-ups. In addition, we further compared the operation time, length of postoperative hospital stay, and postoperative complications of patients with simple and complicated unilateral inguinal hernias.

RESULTS

A total of 1,054 procedures were performed for 878 unilateral inguinal hernias and 88 bilateral inguinal hernias. In total, there were 803 (76.2%) indirect inguinal hernias, 192 (18.2%) direct inguinal hernias, 51 (4.8%) femoral hernias and 8 (0.8%) combined hernias. The mean operative time was 35.5 ± 17.0 min for unilateral inguinal hernias and 51.9 ± 25.5 min for bilateral inguinal hernias. There was one (0.1%) conversion to two-incision laparoscopic transabdominal preperitoneal hernioplasty. No intraoperative haemorrhages, inferior epigastric vessel injury or nerve damage occurred. Postoperative complications were minor and could be resolved without surgical intervention. The mean length of hospital stay was 1.3 ± 0.8 days. The median follow-up was 44 months, no trocar hernia occurred, and there was one (0.1%) recurrence. The operation time in the complicated inguinal hernia group was significantly higher than that in the simple inguinal hernia group (38.9 ± 22.3 vs. 35.0 ± 15.6, p = 0.025). The length of postoperative hospital stay and complication rate of the complicated inguinal hernia group were slightly higher than those of the simple inguinal hernia group, but the difference was not statistically significant.

CONCLUSION

SIL-TAPP is safe and technically feasible, and both short- and long-term outcomes are acceptable.

Improved patient-reported outcomes after open preperitoneal inguinal hernia repair compared to anterior Lichtenstein repair: 10-year ACHQC analysis

INTRODUCTION

The Lichtenstein repair has been synonymous with "open" inguinal hernia repair (IHR) for 40 years. However, international guidelines have suggested that posterior mesh placement results in advantageous biomechanics and reduced risk of nerve-related chronic pain. Additionally, the use of local anesthetics has been shown to reduce postoperative pain and complication risks. An open transrectus preperitoneal/open preperitoneal (TREPP/OPP) repair combines posterior mesh placement with the use of local anesthetic and as such could be the ideal repair for primary inguinal hernia. Using the Abdominal Core Health Quality Collaborative (ACHQC) registry, we compared open anterior mesh with open posterior mesh repairs.

METHODS

We performed a propensity score matched analysis of patients undergoing open IHR between 2012 and 2022 in the ACHQC. After 1:1 optimal matching, both the TREPP/OPP and Lichtenstein cohorts were balanced with 451 participants in each group. Outcomes included patient-reported quality of life (QoL), hernia recurrence, and postoperative opioid use.

RESULTS

Improvement was seen after TREPP/OPP in EuraHS QoL score at 30 days (OR 0.558 [0.408, 0.761]; p = 0.001), and the difference persisted at 1 year (OR 0.588 [0.346, 0.994]; p = 0.047). Patient-reported opioid use at 30-day follow-up was significantly lower in the TREPP/OPP cohort (OR 0.31 [0.20, 0.48]; p < 0.001). 30-day frequency of surgical-site occurrences was significantly higher in the Lichtenstein repair cohort (OR 0.22 [0.06-0.61]; p = 0.007). There were no statistically significant differences in hernia recurrence risk at 1 year, or rates of postoperative bleeding, peripheral nerve injury, DVTs, or UTIs.

CONCLUSION

Our analysis demonstrates a benefit of posterior mesh placement (TREPP/OPP) over anterior mesh placement (Lichtenstein) in open inguinal hernia repair in patient-reported QoL and reduced opioid use.

One-year outcome after open inguinal hernia repair with self-fixated mesh: a randomized controlled trial

PURPOSE

The aim of this study was to analyze pain after surgery with the use of self-fixated meshes, which are commonly used as an alternative for sutured mesh in open inguinal hernia repair.

METHODS

This prospective randomized clinical trial was conducted from November 2018 to March 2021, with a follow-up duration of 12 months. Male patients, aged 18-85, and suitable for day case surgery, were included. The patients received the self-adhesive Adhesix™ mesh or the self-gripping Progrip™ mesh in open inguinal hernia surgery. The primary outcome was the number of additional follow-up visits due to post-operative pain. Secondary outcomes included intensity of pain, quality of life measures, and complications.

RESULTS

Two hundred seventy patients were included in this trial, 132 with Adhesix™ (A group), and 138 with Progrip™ (P-group). All patients' medical records were reviewed 12 months after surgery, and 207 patients (76.2%) completed 12-month follow-up. The number of patients needing additional follow-up visits 3-12 months after surgery were comparable (A group 3/3.0%, P-group 6/5.6%). The numeric rating scale was low at 12 months after surgery (at rest A 0.21, P 0.34, at exercise A 0.78, P 0.90). The incidence of chronic pain, that is moderate or severe pain during exercise, was 5 patients (5.2%) with Adhesix™ and 8 patients (7.4%) with Progrip™ (P = 0.333). Two hernia recurrences (1.0%) were established, one in each group.

CONCLUSION

At 1 year after hernia surgery, the use of self-gripping and self-adhesive meshes lead to successful pain reduction and quality of life improvement.

TRIAL REGISTRATION

CLINICALTRIALS

com NCT03734224.

Unveiling the hidden world of gut health: Exploring cutting-edge research through visualizing randomized controlled trials on the gut microbiota

BACKGROUND

The gut microbiota plays a crucial role in gastrointestinal and overall health. Randomized clinical trials (RCTs) play a crucial role in advancing our knowledge and evaluating the efficacy of therapeutic interventions targeting the gut microbiota.

AIM

To conduct a comprehensive bibliometric analysis of the literature on RCTs involving the gut microbiota.

METHODS

Using bibliometric tools, a descriptive cross-sectional investigation was conducted on scholarly publications concentrated on RCTs related to gut microbiota, spanning the years 2003 to 2022. The study used VOSviewer version 1.6.9 to examine collaboration networks between different countries and evaluate the frequently employed terms in the titles and abstracts of the retrieved publications. The primary objective of this analysis was to identify key research areas and focal points associated with RCTs involving the gut microbiota.

RESULTS

A total of 1061 relevant articles were identified from the 24758 research articles published between 2003 and 2022. The number of publications showed a notable increase over time, with a positive correlation (R2 = 0.978, P < 0.001). China (n = 276, 26.01%), the United States (n = 254, 23.94%), and the United Kingdom (n = 97, 9.14%) were the leading contributing countries. Københavns Universitet (n = 38, 3.58%) and Dankook University (n = 35, 3.30%) were the top active institutions. The co-occurrence analysis shows current gut microbiota research trends and important topics, such as obesity interventions targeting the gut microbiota, the efficacy and safety of fecal microbiota transplantation, and the effects of dietary interventions on humans.

CONCLUSION

The study highlights the rapid growth and importance of research on RCTs that involve the gut microbiota. This study provides valuable insight into research trends, identifies key players, and outlines potential future directions in this field. Additionally, the co-occurrence analysis identified important topics that play a critical role in the advancement of science and provided insights into future research directions in this field.

Laparoscopic versus Open Inguinal Hernia Repair in Aging Patients: A Propensity Score Matching-Based Retrospective Study

Objective

Although laparoscopic repair has been widely carried out and promoted due to its minimally invasive advantages, open surgery is still popular compared to elderly patients. This study aims to compare the outcomes of laparoscopic (LIHR) vs open repair of inguinal hernias (OIHR) in elderly patients.

Methods

A retrospective analysis of the database was performed to identify elderly patients, from January 2021 through December 2022, who underwent surgery for an inguinal hernia. After a 1:1 propensity score matching (PSM) with a caliper of 0.1 was conducted to balance potential bias, binary logistic regressions were used for categorical and continuous outcomes.

Results

After PSM, 78 pairs of elderly patients were enrolled in this study, and there were no significant differences in baseline between LIHR and OIHR groups. Compared to OIHR, univariable and multivariable logistic regression analysis showed that LIHR was independently affected for reducing intraoperative hemorrhage (OR = 0.06, 95% CI: 0.02-0.18, P < 0.001) and shortening postoperative hospitalization time (OR = 0.29, 95% CI: 0.15-0.57, P < 0.001) in elderly patients. Furthermore, LIHR (OR = 0.28, 95% CI: 0.14-0.57, P < 0.001) and age (OR = 0.89, 95% CI: 0.82-0.96, P = 0.002) were independent affecting factors for relieving postoperative pain. Meanwhile, no obvious differences were detected in postoperative complications [LIHR 7.7% (6/78) vs OIHR 14.1% (11/78), P = 0.199].

Conclusion

LIHR was closely associated with reducing intraoperative hemorrhage and shortening postoperative hospitalization time. Whilst LIHR and age were independently affecting factors for relieving postoperative pain.

Standardization and learning curve in laparoscopic hernia repair: experience of a high-volume center

PURPOSE

Groin hernias are a common condition that can be treated with various surgical techniques, including open surgery and laparoscopic approaches. Laparoscopic surgery has several advantages but its use is limited due to the complexity of the posterior inguinal region and the need for advanced laparoscopic skills. This paper presents a standardized and systematic approach to trans-abdominal pre-peritoneal (TAPP) groin hernioplasty, which is useful for training young surgeons.

METHODS

The paper provides a detailed, step-by-step description of the TAPP based on evidence from literature, anatomical knowledge, and the authors' experience spanning over 30 years. The sample includes 487 hernia repair procedures, with 319 surgeries performed by experienced surgeons and 168 surgeries performed by young surgeons in training. The authors performed a descriptive analysis of their data to provide an overview of the volume of laparoscopic hernioplasty performed.

RESULTS

The analysis of the data shows a low complication rate of 0.41% (2/487) and a low recurrence rate of 0.41% (2/487). The median duration of the surgery was 55 min, while the median operation time for surgeons in training was 93 min, specifically 83 min for unilateral hernia and 115 min for bilateral hernia.

CONCLUSIONS

The TAPP procedure appears, to date, comparable to the open inguinal approach in terms of recurrence, postoperative pain and speed of postoperative recovery. In this paper, the authors challenge the belief that TAPP is not suitable for surgeons in training. They advocate for a training pathway that involves gradually building surgical skills and expertise. This approach requires approximately 100 procedures to achieve proficiency.

What is the ideal mesh location for incisional hernia prevention during elective laparotomy? A network meta-analysis of randomized trials

BACKGROUND

Incisional hernia (IH) represents an important complication after surgery. Prophylactic mesh reinforcement (PMR) with different mesh locations [onlay (OL), retromuscular (RM), preperitoneal (PP), and intraperitoneal (IP)] has been described to possibly reduce the risk of postoperative IH. However, data reporting the 'ideal' mesh location are sparse. The aim of this study was to evaluate the optimal mesh location for IH prevention during elective laparotomy.

METHODS

Systematic review and network meta-analysis of randomized controlled trials (RCTs). OL, RM, PP, IP, and no mesh (NM) were compared. The primary aim was postoperative IH. Risk ratio (RR) and weighted mean difference (WMD) were used as pooled effect size measures, whereas 95% credible intervals (CrI) were used to assess relative inference.

RESULTS

Fourteen RCTs (2332 patients) were included. Overall, 1052 (45.1%) had no mesh (NM) while 1280 (54.9%) underwent PMR stratified in IP ( n =344 pts), PP ( n =52 pts), RM ( n =463 pts), and OL ( n =421 pts) placement. Follow-up ranged from 12 months to 67 months. RM (RR=0.34; 95% CrI: 0.10-0.81) and OL (RR=0.15; 95% CrI: 0.044-0.35) were associated with significantly reduced IH RR compared to NM. A tendency toward reduced IH RR was noticed for PP versus NM (RR=0.16; 95% CrI: 0.018-1.01), while no differences were found for IP versus NM (RR=0.59; 95% CrI: 0.19-1.81). Seroma, hematoma, surgical site infection, 90-day mortality, operative time and hospital length of stay were comparable among treatments.

CONCLUSIONS

RM or OL mesh placement seems associated with reduced IH RR compared to NM. PP location appears promising; however, future studies are warranted to corroborate this preliminary indication.

The Utility of Minimally Invasive Surgery in the Emergency Management of Femoral Hernias: A Systematic Review

Background: Femoral hernias are a relatively rare type of hernia but have a high complication rate, with a high proportion either presenting as an emergency or requiring emergency management. Minimal access surgery has been shown to be safe, with good results, in an elective setting, but there is little published evidence of its utility in an emergency. Methods: A systematic review was conducted searching PubMed, OVID, Embase, and Cochrane reviews for ((Femoral hernia) AND (laparoscop* OR minimal access OR robotic)) AND (strangulat* OR obstruct* OR incarcerat*). Results: 286 manuscripts were identified of which 33 were relevant. 24 were individual case reports, 3 case series, 4 cohort studies or case control series, and 2 high level reviews of National registers. Conclusion: Minimal access surgery can avoid an unnecessary laparotomy for the assessment of hernial contents, especially via a TAPP approach. Minimal access repair of femoral hernias as an emergency is feasible and can be done safely with results similar to open surgery but good quality evidence is lacking.

The role of prophylactic antibiotics in elective inguinal tension-free hernia repair: A systematic review and meta-analysis

Whether to use antibiotics to prevent surgical site infection in elective inguinal tension-free hernia repair has been controversial. To systematically evaluate the effect of prophylactic antibiotic application in elective inguinal tension-free hernia repair, we identified all published randomised controlled trials of the effect of prophylactic antibiotic application on elective inguinal tension-free hernia repair were collected by computer retrieval from the China National Knowledge Infrastructure; VIP Database; Wanfang Database; China Biomedical Literature Database; and PubMed, EMBASE and Cochrane Library databases. Meta-analysis was performed by RevMan 5.3 software. The meta-analysis showed that the total incidence of surgical site infections [P = 0.003] and the incidence of superficial surgical site infections [P = 0.004] in the antibiotic group (AG) were lower than those in the non-antibiotic group (NAG). There was no significant difference in the total incidence of postoperative infections [P = 0.06], deep surgical site infections [P = 0.26] and seroma [P = 0.52] between the AG and the NAG. Based on current evidence, the application of prophylactic antibiotics in elective inguinal tension-free hernia repair can prevent the total incidence of surgical site infections and that of superficial surgical site infections but cannot prevent the total incidence of postoperative infection events, incidence of deep surgical site infections and incidence of seroma.

Fascia defect closure versus non-closure in minimal invasive direct inguinal hernia mesh repair: a systematic review and meta-analysis of real-world evidence

PURPOSE

Laparoscopic and robotic inguinal hernia mesh repair are both common surgical procedures worldwide. Postoperative hernia recurrence and seroma formation are important concerns. In ventral hernia, primary defect closure in laparoscopic surgery reduces the recurrence rate. However, there is no synthetic evidence of direct inguinal hernia defect closure versus non-closure in minimal invasive surgery. Therefore, this study investigated the efficacy of defect closure in patients undergoing minimal invasive direct inguinal hernia mesh repair.

METHODS

Eligible studies were identified through a search of PubMed, Embase, Cochrane Library, and CINAHL from their inception until March 2022. Studies examining defect closure in laparoscopic direct inguinal hernia repair were included, and a meta-analysis was performed using the random-effect model. Sensitivity analyses were performed by removing one study at a time. The primary outcomes were hernia recurrence and seroma formation. Acute and chronic postoperative pain, operation time, and length of hospital stay were the secondary outcomes.

RESULTS

Five nonrandomized studies and one randomized controlled trial were included. Pooled analysis revealed defect closure might reduce the hernia recurrence rate (risk difference, - 0.02; 95% confidence interval [CI] - 0.04 to - 0.00; p = 0.02). The result of seroma formation (odds ratio, 0.49; 95% CI 0.17-1.46; p = 0.20) showed no significant difference. Moreover, no significant differences were observed in acute postoperative pain, chronic pain, length of hospital stay, and operation time.

CONCLUSIONS

Our study indicated defect closure seems to be an option to reduce the direct inguinal hernia recurrence rate. No significant benefits were shown in seroma formation and other secondary outcomes. Our study was mostly based on nonrandomized studies and underestimated the effect of defect closure; thus, further high-quality studies are required to draw definitive conclusions.

Postoperative outcomes using Lichtenstein open hernioplasty versus Nyhus preperitoneal hernioplasty in inguinal hernia: A comparative analysis with 1-year follow-up

Background and Aim

Inguinal hernia is the most common defect of the abdominal wall in 75% and their treatment consists of surgical repair. The technique of choice is laparoscopic because of its overall benefits. However, when this is not available, open approaches may be a viable option. Currently, the most commonly used open techniques are Lichtenstein and Nyhus. However, there are few medium- or long-term studies that have compared outcomes between these two techniques.

Methods

This is a retrospective comparative study that included patients undergoing open inguinal hernia correction with mesh, using Lichtenstein open hernioplasty versus Nyhus preperitoneal hernioplasty, in two tertiary referral centers in Bogota, Colombia, during a period of 2 years. A bivariate analysis was performed to compare groups, according to the complications presented between the two techniques.

Results

A total of 193 patients were included, of whom 53.36% were men and 112 (58.03%) were approached with the Nyhus technique versus 81 patients with the Lichtenstein technique. Nonabsorbable suture fixation was performed in 100% of patients. Among the main complications, seroma (5.18%), pain (4.14%), bleeding (2.07%), recurrence (10.88%), and reoperation (0.51%) were observed, of which only recurrence showed a statistically significant difference, which is lower in the Nyhus approach (3.57% vs. 20.67%; p < 0.001). No patients died.

Conclusions

Both Nyhus and Lichtenstein hernioplasty techniques were shown to cause a low incidence of postoperative complications, with significantly lower recurrence using the Nyhus technique up to 1 year postoperatively.

Comparison of perioperative and mid-term outcomes between laparoscopic and robotic inguinal hernia repair

BACKGROUND

Although the advantages of laparoscopic inguinal hernia repair (LIHR) have been described, guidelines regarding robotic inguinal hernia repair (RIHR) have yet to be established, despite its increased adoption as a minimally invasive alternative. This study compares the largest single-center cohorts of LIHR and RIHR and aims to shed light on the differences in outcomes between these two techniques.

METHODS

Patients who underwent LIHR or RIHR over an 8-year period were included as part of a retrospective analysis. Variables were stratified by preoperative, intraoperative, and postoperative timeframes. Complications were listed according to the Clavien-Dindo classification system and comprehensive complication index (CCI®). Study groups were compared using univariate analyses and Kaplan-Meier's time-to-event analysis.

RESULTS

A total of 1153 patients were included: 606 patients underwent LIHR, while 547 underwent RIHR. Although demographics and comorbidities were mostly similar between the groups, the RIHR group included a higher proportion of complex hernias. Operative times were in favor of LIHR (42 vs. 53 min, p < 0.001), while RIHR had a smaller number of peritoneal breaches (0.4 vs. 3.8%, p < 0.001) as well as conversions (0.2 vs. 2.8%, p < 0.001). The number of patients lost-to-follow-up and the average follow-up times were similar (p = 0.821 and p = 0.304, respectively). Postoperatively, CCI® scores did not differ between the two groups (median = 0, p = 0.380), but Grade IIIB complications (1.2 vs. 3.3%, p = 0.025) and recurrences (0.8% vs. 2.9%, p = 0.013) were in favor of RIHR. Furthermore, estimated recurrence-free time was higher in the RIHR group [p = 0.032; 99.7 months (95% CI 98.8-100.5) vs. 97.6 months (95% CI 95.9-99.3).

CONCLUSION

This study demonstrated that RIHR may confer advantages over LIHR in terms of addressing more complex repairs while simultaneously reducing conversion and recurrence rates, at the expense of prolonged operation times. Further large-scale prospective studies and trials are needed to validate these findings and better understand whether RIHR offers substantial clinical benefit compared with LIHR.

Efficacy and Safety of Enhanced Recovery After Surgery Pathway in Minimally Invasive Colorectal Cancer Surgery: A Systemic Review and Meta-Analysis

Background: Enhanced recovery after surgery (ERAS) has been proven valuable for colorectal cancer (CRC) patients who received traditional surgery. While for those receiving minimally invasive surgery (MIS), its efficacy and safety remain debatable. Materials and Methods: Databases, including PubMed, EMBASE, Cochrane libraries, and Web of science, were searched for relevant articles from their inception to February 23, 2022. Eligible articles were subjected to quality assessment and data extraction. The comparison between ERAS and traditional care (TC) was performed. Primary outcomes of this study were postoperative length of stay (LOS), postoperative complications, and mortality. Secondary outcomes were 30-day readmission, 30-day reoperation, time to the first anal exhaust, and defecation. Results: Thirteen cohort studies covering 4308 patients were included. Patients in the ERAS group had significantly shorter LOS (weight mean differences [WMD]: -1.89; 95% confidence interval [CI]: -2.33 to -1.45; P < .001), lower incidence of postoperative complications (risk ratios [RR]: 0.73; 95% CI: 0.5-0.88; P < .001), lower 30-day readmission rate (RR: 0.75; 95% CI: 0.61-0.92; P < .05), and shorter time to the first defecation (WMD: -1.93; 95% CI: -3.26 to -0.59; P < .001), but unimproved mortality, reoperation rate, and time to the first anal exhaust (P > .05) compared with those in the TC group. Conclusions: ERAS was effective and safe for CRC patients receiving MIS from a real-world perspective. Hence, the implementation of ERAS should be recommended for minimally invasive CRC surgery. Clinical Trial Registration Number: CRD42022321333.

A Critical Appraisal of the Chronic Pain Rate After Inguinal Hernia Repair

Purpose: To critically appraise highly cited studies reporting on the rate of chronic pain after inguinal hernia repair. Methods: Google Scholar was searched on 23 May 2022. We only included publications with more than 10 citations per year since publication and more than 100 citations in total. Both reports of original data and systematic reviews were included. Risk of bias and quality of the included studies were assessed with either the Joanna Briggs Institute Checklist for Prevalence Studies or the AMSTAR 2 depending on study design. Results: Twenty studies were included and evaluated. The rate of chronic postoperative inguinal pain of any degree ranged from 10%-63%, and the rate of moderate-to-severe pain ranged from 1%-18%. All studies reported the rate of pain of any degree, and most studies reported the rate of moderate-to-severe pain influencing daily activities. Studies used different temporal definitions of chronic pain, but most studies defined it as pain persisting either three or six months postoperatively. Ten studies used unvalidated questionnaires or significantly modified versions of validated questionnaires. Eleven studies primarily included patients receiving open repair. Included studies had median 21 citations per year (range 10-39) and median 387 citations in total (range 127-788). Conclusion: The rates of chronic postoperative inguinal pain reported in the included highly cited studies are possibly inaccurate, excessive, and outdated. New prospective studies based on uniform definitions and standards of measurement are warranted to better assess a contemporary chronic pain rate after inguinal hernia repair.

Risk factors for early and late morbidity in patients with cardiovascular disease undergoing inguinal hernia repair with a tailored approach: a single-center cohort study

BACKGROUND

Inguinal hernia repair is a common procedure in surgery. Patients with cardiovascular disease have an increased operative risk for postoperative morbidity. The study aimed to identify the most beneficial surgical procedure for these patients.

METHODS

Patients undergoing elective surgery for unilateral or bilateral inguinal hernia between December 2015 and February 2020 were included. The cohort was divided into the group of patients with (CVD group) and without (NO group) cardiovascular disease and analyzed according to the postoperative morbidity distribution and correlated to the surgical technique used.

RESULTS

Of the 474 patients included 223 (47%) were operated on using the Lichtenstein technique and 251 (53%) using TAPP, respectively. In the CVD group the Lichtenstein procedure was more common (n = 102, 68.9%), in the NO group it was TAPP (n = 205, 62.9%; p < 0.001). 13 (8.8%) patients in the CVD group and 12 (3.7%) patients in the NO group developed a postoperative hematoma (p = 0.023). In the further subgroup analysis within the CVD group revealed cumarine treatment as a risk factor for postoperative hematoma development, whereas the laparoscopic approach did not elevate the morbidity risk.

CONCLUSION

CVD is a known risk factor for perioperative morbidity in general surgery, however, the TAPP method does not elevate the individual perioperative risk.