Ten-year trends in minimally invasive hernia repair: a NSQIP database review

Laparoscopic Versus Robotic Ventral Hernia Repair - An ACHQC Database 5-Year Analysis

Introduction

To compare laparoscopic and ventral hernia repair (VHR) in the last 5 years in the United States utilizing the Abdominal Core Health Quality Collaborative (ACHQC) database.

Materials and Methods

A retrospective review of prospectively collected data from the ACHQC database was performed to include all adult patients that underwent laparoscopic and robotic VHR in the last 5 years. Univariate analysis was performed to compare outcomes from laparoscopic and robotic-assisted approaches across perioperative and postoperative outcomes.

Results

ACHQC database identified 11,096 patients with midline hernias who underwent VHR with mesh. The Laparoscopic group with patients from 2018 to 2023 (LAP) had 2,063 patients, and the robotic group (ROBO) had 9,033 patients. There was no difference in sex, age, BMI, DM, smoking status and COPD between groups. Median hernia width was 4 cm (IQR 2-6) in the ROBO group and 3 cm (IQR 2-5) in the LAP group (p < 0.001). Incisional hernia was higher in the ROBO group 5,259 (58%) versus 1,099 (53%) in the LAP group (p < 0.001). Recurrent hernia was more common in the ROBO group when compared with the LAP group (p < 0.001). Both groups had more permanent synthetic mesh. Retromuscular repair was higher in the ROBO group, 3,201 (37.6%) versus 68 (4.2%) in the LAP group (p < 0.001). The intraperitoneal repair was higher in the LAP group 1,363 (83%) versus 2,925 (34%) in the ROBO group (p < 0.001) Transversus Abdominis Release (TAR) was higher in the ROBO group 1,314 (14.5%) versus 5 (0.2%) in the LAP group (p < 0.001). Fascial closure was higher in the ROBO group (8,649; 96.5% versus 1,359; 67.3% in the LAP group p < 0.001). Regarding mesh fixation, regular suture was higher in the ROBO group 92% versus 61% in the LAP group (p < 0.001). Tacks (p < 0.001) was higher in the LAP group. The ROBO group had more patients with an operative time of 240+ minutes when compared with the LAP group (p < 0.001). There was no difference in 30-days readmission rates, recurrence, reoperation, overall postoperative complications, 30-day SSI, SSO, seroma and SSOPI between the groups.

Conclusion

The Robotic approach was associated with more technically challenging ventral hernia repairs with low complication rates over time. However, no differences in postoperative complications were found between the groups.

Impact of 2023 Ventral Hernia Repair CPT Code Changes on Work Relative Value Units in a Tertiary Hernia Referral Center

BACKGROUND

CPT codes for ventral hernia repair (VHR) changed in January 2023 to address the heterogeneity of procedures with a concomitant shift from a 90- to 0-day global period. This study reviews a tertiary referral center's experience with hernia coding comparing the work relative value units (wRVUs) generated for VHR pre-2023 compared with post-2023.

STUDY DESIGN

CPT codes were analyzed for patients undergoing open or laparoscopic VHR before updates to the CPT hernia codes (January 2022 to September 2022) and after CPT change (January 2023 to September 2023). wRVU values were assigned based on nationally published values. CPT codes in 2022, CPT codes in 2023, 8 inpatient evaluation and management (E&M) codes, and 5 outpatient E&M codes were evaluated.

RESULTS

A total of 299 patients underwent VHR, 143 in 2022 and 156 in 2023. Average procedural VHR wRVUs increased from 9.6 in 2022 to 11.6 in 2023 (p < 0.001). Procedures involving myofascial advancement flaps or component separation techniques (53.8% vs 48.7%, p = 0.419) and wRVUs for the component separation procedures were similar between 2022 and 2023, respectively, 17.7 vs 16.1 (p = 0.419). The wRVUs associated with adjunctive procedures (mesh removal or placement) decreased from 3.3 to 0.6 (p < 0.001) in the post-2023 era. Postoperative E&M wRVUs increased in 2023 for postoperative inpatient (0.48) and postoperative outpatient (0.39) services, compared with 0 wRVUs in 2022. Overall, the total management including follow-up clinic visit adjusted wRVUs for hernia repair was similar between 2022 and 2023, respectively 30.7 vs 29.2 (p = 0.409).

CONCLUSIONS

Procedural wRVUs for anterior abdominal hernia repair increased from 2022 to 2023 (p < 0.001) at a tertiary referral medical center. However, total wRVUs, including the operation and postoperative visits, remained unchanged.

Association of DCI with number of preoperative comorbidities and 30-day outcomes following inguinal hernia repair: an analysis of the ACHQC database

INTRODUCTION

The Distressed Communities Index (DCI) is a stratification tool that captures socioeconomic disparities based on zip code. To date, no prior study has investigated the association of DCI score and inguinal hernia repair outcomes. This study aims to evaluate the association between DCI score and 30-day outcomes following inguinal hernia repair using the Abdominal Core Health Quality Collaborative (ACHQC) database. We hypothesize that patients with higher DCI scores will have a higher number of comorbidities and 30-day postoperative events.

METHODS AND PROCEDURES

All patients who underwent inguinal hernia repair from 2015 to 2023 with an available DCI score and 30-day follow-up data available were included. Patients were stratified into DCI quintiles based on zip code. Primary outcomes of interest were 30-day hernia-specific postoperative outcomes. Pearson's chi-squared and Kruskal-Wallis tests were used to compare DCI scores with comorbid conditions and perioperative outcomes.

RESULTS

30,927 patients were included for analysis; 12,206 patients were classified as prosperous (40%), 7190 patients as comfortable (23%), 4884 patients as mid-tier (16%), 3485 patients as at-risk (11%), and 3162 as distressed (10%). Distressed patients were more likely to have ASA 3 or higher and comorbidities including hypertension, diabetes, ESRD, and COPD (p < 0.001). Patients with higher DCI scores were significantly more likely to undergo an emergency operation and have a longer OR time (p < 0.001). Distressed patients were also more likely to experience a major wound complication requiring readmission (p = 0.05) and reoperation (p < 0.001).

CONCLUSION

DCI scores are strongly linked to surgical risk and outcomes following inguinal hernia repair. Special consideration should be given to DCI scores when optimizing patients prior to inguinal hernia repair.

Video Review Can Measure Surgical Robotic Skill Development in a Resident Robotic Hernia Curriculum: A Retrospective Cohort Study

Background

Hernia repairs are one of the most common general surgery procedures and an essential part of training for general surgery residents. The widespread incorporation of robotic hernia repairs warrants the development of a procedure-specific robotic curriculum to assist novice surgeons in improving technical skills.

Objective

To evaluate a robotic hernia simulation-based curriculum for general surgery residents using video review.

Methods

Retrospective cohort study of PGY-3 general surgery residents from the University of Chicago from 2019 to 2021. The residents completed inguinal hernia repair (IHR) and ventral hernia repair (VHR) drills as part of a robotic simulation curriculum. The drills were recorded and graded according to the modified objective structured assessment of technical skills (OSATS) and time to completion. The drills were completed by 3 attending surgeons to establish gold-standard benchmarks.

Results

In total, 20 residents started the curriculum, 19 completed all IHR drills and 17 completed all VHR drills. Attending surgeon total OSATS scores and time to completion were significantly better than the trainees on the first attempt (P < 0.05). When comparing 1st to 4th attempt, resident OSATS scores improved significantly for IHR (15.5 vs 23.3; P < 0.001) and VHR (16.8 vs 23.3; P < 0.001). Time also improved over 4 attempts (IHR: 28.5 vs 20.5 minutes; P < 0.001 and VHR: 29.6 vs 21.2 minutes; P < 0.001). Residents achieved attending-level OSATS scores by their fourth attempt for VHR, but not for IHR. Residents did not achieve attending-level times for either hernia drills.

Conclusions

The robotic hernia curriculum improved resident performance on hernia repair drills and was well-received by the residents.

Development of Ventral Hernia Repair Curriculum Using the AWSSOM-a Synthetic Abdominal Wall Surgical Skills Operational Model

INTRODUCTION

Ventral hernia repair cost the U.S. healthcare system nearly 3 billion dollars annually. Surgical repair is a critical competency for residents yet hernia recurrence rates following mesh-based repair range from 0.8% to 24%. Improving surgical techniques using cadavers is often cost-prohibited for many education programs and limited research exists using simulation models with a corresponding hernia repair curriculum in the graduate medical education setting. This pilot project aimed to develop a low cost, easily reproducible novel abdominal wall reconstruction model and pilot-test the ventral hernia repair curriculum to inform further refinement prior to formal evaluation.

MATERIAL AND METHODS

This descriptive study pilot-tested the newly refined Abdominal Wall Surgical Skills Operative Model (AWSSOM) simulator for ventral hernia repair with mesh and its corresponding 2-h training curriculum for use at all levels of general surgery graduate medical education. The AWSSOM is a 3D printed synthetic anatomically realistic abdominal wall model consisting of silicone cured layers of skin, fat, rectus abdominis and a posterior rectus sheath fascia, and silicone tubules to simulate lateral neurovascular bundles. The curriculum incorporated didactic content reflecting surgical practice guidelines, hands-on practice, and faculty guidance promoting interactive critical thinking development during task performance. A pre-/post-assessment included a 10-item knowledge test, a 19-item psychomotor assessment, and 4-items confidence survey to examine changes in performance, knowledge, and confidence in competently completing the ventral hernia repair technique. Descriptive statistics were used to report the limited results of six military surgical resident participants and inform further model and curriculum refinement prior to formal evaluation.

RESULTS

The five-layer AWSSOM model was manufactured in 65 h at a material cost of $87 per model frame, is reusable model, and secure base. Six surgical residents were recruited; only four completed both pre- and post-tests due to resident schedule conflicts. The average increase in knowledge was 25%, although variable changes in confidence were observed over the four program year participants. A larger sample size and a control group are needed to demonstrate curriculum effectiveness at improving knowledge, performance, and confidence in ventral hernia repair with mesh and better delineate if high scores translate to better operative skills. A key improvement requested by residents was a more secure model base for dissection and performance of the hernia repair.

CONCLUSIONS

The novel abdominal wall surgical skills operative model fills an important proof of concept gap in simulation training. It is low cost with the potential to improve cognitive and psychomotor skills, as well as confidence to competently complete ventral hernia repair with mesh in the graduate medical education setting. Prior to formal effectiveness testing, our lessons learned should be addressed in both the model and curriculum. Future studies must include an adequately powered statistical evaluation with a larger sample across all levels of training.

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.

Heterogeneity in the surgical approach to recurrent abdominal wall hernias: an opportunity for quality improvement

BACKGROUND

Despite being a challenging and morbid clinical problem, operative approaches to recurrent abdominal wall hernia repairs receive little attention. Given this, we performed a retrospective study to evaluate surgical techniques of recurrent abdominal wall hernias requiring reoperation.

METHODS

Adult patients from the Michigan Surgical Quality Collaborative Core Optimization Hernia Registry (MSQC-COHR) were included in this study. All elective ventral hernia operations performed between January 1, 2020, and March 31, 2023, were included. Descriptive analyses via t-tests and Fisher exact tests were conducted to evaluate sociodemographic, operative, and hernia-specific attributes associated with primary and recurrent hernia repairs.

RESULTS

We identified 8587 patients who underwent elective abdominal wall hernia repair. Of these, 7887 (91.8%) underwent primary repair, and 700 (8.2%) underwent recurrent repair. Patients who underwent recurrent hernia repair were older (mean age 57.9 years vs. 54.1 years, p < 0.001), more often female (53.8% vs. 41.9%, p < 0.001), and had higher BMI (34.0 vs. 32.6, p < 0.001). Patients with recurrent hernias were more likely to have comorbid conditions including hypertension (p < 0.001), diabetes (p < 0.005), COPD (p < 0.01), and BMI > 40 (p < 0.05). Recurrent hernia repairs were more likely to have any 30-day complication (6.4% versus 1.9%, p < 0.001), including higher rates of all surgical site infections. There was no difference in 30-day readmission rates.

CONCLUSION

Considerable variation persists in operative management of recurrent abdominal wall hernias. Importantly, not all recurrent hernias were managed with mesh, which may precipitate additional recurrences and further morbidity. Understanding outcomes for these varied approaches to recurrent hernia repairs is critical to optimize management of this complex clinical problem and prevent future episodes of recurrence.

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.

The association of permanent versus absorbable fixation on developing chronic post-herniorrhaphy groin pain in patients undergoing laparoscopic inguinal hernia repair

INTRODUCTION

Fixation of mesh during minimally invasive inguinal hernia repair is thought to contribute to chronic post-herniorrhaphy groin pain (CGP). In contrast to permanent tacks, absorbable tacks are hypothesized to minimize the likelihood of CGP. This study aimed to compare the rates of CGP after laparoscopic inguinal hernia repair between absorbable versus permanent fixation at maximum follow-up.

METHODS

This is a post hoc analysis of a randomized controlled trial in patients undergoing laparoscopic inguinal hernia repair (NCT03835351). All patients were contacted at maximum follow-up after surgery to administer EuraHS quality of life (QoL) surveys. The pain and restriction of activity subdomains of the survey were utilized. The primary outcome was rate of CGP, as defined by a EuraHS QoL pain domain score ≥ 4 measured at ≥ 1 year postoperatively. The secondary outcomes were pain and restriction of activity domain scores and hernia recurrence at maximum follow-up.

RESULTS

A total of 338 patients were contacted at a mean follow-up of 28 ± 11 months. 181 patients received permanent tacks and 157 patients received absorbable tacks during their repair. At maximum follow-up, the rates of CGP (27 [15%] vs 28 [18%], P = 0.47), average pain scores (1.78 ± 4.38 vs 2.32 ± 5.40, P = 0.22), restriction of activity scores (1.39 ± 4.32 vs 2.48 ± 7.45, P = 0.18), and the number of patients who reported an inguinal bulge (18 [9.9%] vs 15 [9.5%], P = 0.9) were similar between patients with permanent versus absorbable tacks. On multivariable analysis, there was no significant difference in the odds of CGP between the two groups (OR 1.23, 95% CI [0.60, 2.50]).

CONCLUSION

Mesh fixation with permanent tacks does not appear to increase the risk of CGP after laparoscopic inguinal hernia repair when compared to fixation with absorbable tacks. Prospective trials are needed to further evaluate this relationship.

Comparative analysis of different surgical approaches for recurrent inguinal hernia: a single-center observational study

Purpose

Managing recurrent inguinal hernias is complex, and choosing the right surgical approach (laparoscopic vs. open) is vital for patient outcomes. This study compared the outcomes of using the same vs. different surgical approaches for initial and subsequent hernia repairs.

Methods

We retrospectively analyzed patients who underwent recurrent inguinal hernia repair at Seoul National University Bundang Hospital between January 2014 and May 2023. Patients were divided into the "concordant" and "discordant" groups, comprising patients who underwent same and different approaches in both surgeries, respectively. Preoperative baseline characteristics, index surgery data, postoperative outcomes, and recurrence rates were analyzed and compared.

Results

In total, 131 patients were enrolled; the concordant and discordant groups comprised 31 (open, n = 19; laparoscopic, n = 12) and 100 patients (open to laparoscopic, n = 68; laparoscopic to open, n = 32), respectively. No significant differences were observed in the mean operation time (50.5 ± 21.7 minutes vs. 50.2 ± 20.0 minutes, P = 0.979), complication rates (6.5% vs. 14.0%, P = 0.356), or 36-month cumulative recurrence rates (9.8% vs. 9.8%; P = 0.865). The mean postoperative hospital stay was significantly shorter in the discordant than in the concordant group (1.8 ± 0.7 vs. 1.4 ± 0.6, P = 0.003).

Conclusion

Most recurrent inguinal hernia repairs were performed using the discordant surgical approach. Overall, concordance in the surgical approach did not significantly affect postoperative outcomes. Therefore, the selection of the surgical approach based on the patient's condition and surgeon's preference may be advisable.

Outpatient Surgery and Unplanned Overnight Admission in Bilateral Inguinal Hernia Repair: A Population-based Study

PURPOSE

The use of outpatient surgery in inguinal hernia is heterogeneous despite clinical recommendations. This study aimed to analyze the utilization trend of outpatient surgery for bilateral inguinal hernia repair (BHIR) in Spain and identify the factors associated with outpatient surgery choice and unplanned overnight admission.

METHODS

A retrospective observational study of patients undergoing BIHR from 2016 to 2021 was conducted. The clinical-administrative database of the Spanish Ministry of Health RAE-CMBD was used. Patient characteristics undergoing outpatient and inpatient surgery were compared. A multivariable logistic regression analysis was performed to identify factors associated with outpatient surgery choice and unplanned overnight admission.

RESULTS

A total of 30,940 RHIBs were performed; 63% were inpatient surgery, and 37% were outpatient surgery. The rate of outpatient surgery increased from 30% in 2016 to 41% in 2021 (p < 0.001). Higher rates of outpatient surgery were observed across hospitals with a higher number of cases per year (p < 0.001). Factors associated with outpatient surgery choice were: age under 65 years (OR: 2.01, 95% CI: 1.92-2.11), hospital volume (OR: 1.59, 95% CI: 1.47-1.72), primary hernia (OR: 1.89, 95% CI: 1.71-2.08), and laparoscopic surgery (OR: 1.47, 95% CI: 1.39-1.56). Comorbidities were negatively associated with outpatient surgery. Open surgery was associated (OR: 1.26, 95% CI: 1.09-1.47) with unplanned overnight admission.

CONCLUSIONS

Outpatient surgery for BHIR has increased in recent years but is still low. Older age and comorbidities were associated with lower rates of outpatient surgery. However, the laparoscopic repair was associated with increased outpatient surgery and lower unplanned overnight admission.

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.

Transabdominal Minimally Invasive Repair of a Left Chronic Traumatic Diaphragmatic Hernia

Although the exact incidence of traumatic diaphragmatic hernia (TDH) is unknown, it can carry significant morbidity if not treated promptly. TDH is thought to be more common in penetrating thoracoabdominal trauma compared to blunt trauma. The left side is thought to be more commonly affected than the right due to the protective effects of the liver on the right hemidiaphragm in trauma. Although large defects are evident on CT imaging and the detection rate is improved with higher resolution CT scanners, smaller ruptures may require laparoscopy for definitive diagnosis if there is a high index of suspicion. In this case report, we present a case of a missed left TDH on CT imaging, with eventual herniation of the omentum and stomach. Although TDH traditionally is approached via thoracotomy or laparotomy, we demonstrate that a transabdominal minimally invasive approach with robot-assisted laparoscopic repair is a viable option, with the potential to reduce the morbidities associated with the open approach.

Robotic repair of moderate-sized midline ventral hernias reduced complications, readmissions, and length of hospitalization compared to open techniques

PURPOSE

To compare outcomes of robotic and open repair for uncomplicated, moderate-sized, midline ventral hernias.

METHODS

From 2017 to 2021, patient characteristics and 30 day outcomes for all ventral hernias at our center were prospectively collected. We studied hernias potentially suitable for robotic repair: elective, midline, 3-10 cm rectus separation, no prior mesh, and no need for concomitant procedure. Robotic or open repair was performed by surgeon or patient preference. The primary outcome was any complication using Clavien-Dindo scoring. Secondary outcomes were operative time, length-of-stay, and readmissions. Regression identified predictors of complications.

RESULTS

Of 648 hernias repaired, 70 robotic and 52 open repairs met inclusion criteria. The groups had similar patient demographics, co-morbidities, and hernia size, except that there were more immunosuppressed patients in the open group (11 versus 5 patients, p = 0.031). Complications occurred after 7 (13%) open repairs versus 2 (3%) robotic repairs, p = 0.036. Surgical site infection occurred after four open repairs but no robotic repair, p = 0.004. Length-of-stay averaged almost 3 days longer after open repair (4.3 ± 2.7 days versus 1.5 ± 1.4 days, p = 0.031). Readmission occurred after 6 (12%) oppen repairs but only 1 (1%) robotic repair. A long-term survey (61% response rate after mean follow-up of 2.8 years) showed that the HerQLes QOL score was better after robotic repair (46 ± 15 versus 40 ± 17,  = 0.049). In regression models, only open technique predicted complications.

CONCLUSIONS

Robotic techniques were associated with fewer complications, shorter hospitalization, fewer infections, and fewer readmissions compared to open techniques. Open surgical technique was the only predictor of complications.

The Role of Robotics in Abdominal Wall Reconstruction

Robotic abdominal wall reconstruction is becoming an accepted technique to approach complex hernias in a minimally invasive fashion. There remain a deficit of high-quality data to suggest significant clinical benefit but current randomized trials are ongoing. Robotic surgery can be applied to a range of abdominal wall defects safely and with positive outcomes which are at least equivocal to open abdominal wall techniques.

Mesh-based inguinal hernia repairs in an integrated healthcare system and surgeon and hospital volume: a cohort study of 110,808 patients from over a decade

PURPOSE

The aim of this study was to describe a cohort of patients who underwent inguinal hernia repair within a United States-based integrated healthcare system (IHS) and evaluate the risk for postoperative events by surgeon and hospital volume within each surgical approach, open, laparoscopic, and robotic.

METHODS

Patients aged ≥ 18 years who underwent their first inguinal hernia repair were identified for a cohort study (2010-2020). Average annual surgeon and hospital volume were broken into quartiles with the lowest volume quartile as the reference group. Multiple Cox regression evaluated risk for ipsilateral reoperation following repair by volume. All analyses were stratified by surgical approach (open, laparoscopic, and robotic).

RESULTS

110,808 patients underwent 131,629 inguinal hernia repairs during the study years; procedures were performed by 897 surgeons at 36 hospitals. Most repairs were open (65.4%), followed by laparoscopic (33.5%) and robotic (1.1%). Reoperation rates at 5 and 10 years of follow-up were 2.4% and 3.4%, respectively; rates were similar across surgical groups. In adjusted analysis, surgeons with higher laparoscopic volumes had a lower reoperation risk (27-46 average annual repairs: hazard ratio [HR] = 0.63, 95% confidence interval [CI] 0.53-0.74; ≥ 47 repairs: HR 0.53, 95% CI 0.44-0.64) compared to those in the lowest volume quartile (< 14 average annual repairs). No differences in reoperation rates were observed in reference to surgeon or hospital volume following open or robotic inguinal hernia repair.

CONCLUSION

High-volume surgeons may reduce reoperation risk following laparoscopic inguinal hernia repair. We hope to better identify additional risk factors for inguinal hernia repair complications and improve patient outcomes with future studies.

Effects of cognitive status on outcomes of groin hernia repair using various anesthesia techniques

BACKGROUND AND AIM

Because of increasing life expectancy, there is an increasing number of cognitively impaired older individuals undergoing surgeries such as groin hernia repair. Here, we evaluated the effects of cognitive status on postoperative complication rates in patients undergoing groin hernia repair using various anesthesia techniques. We also analyzed the rate of same-day hernia surgery in patients with cognitive decline.

METHODS

Patients who presented to our general surgery clinic for unilateral or bilateral inguinal or femoral hernia were prospectively classified into general (group 1), local (group 2), and spinal (group 3) anesthesia groups. The Mini-Mental State Examination (MMSE) was used for preoperative evaluation of each patient's cognitive status. The Visual Analog Scale (VAS) was used to evaluate postoperative pain. Groups were compared in terms of age, MMSE and VAS scores, cognitive decline and complication rates, and surgery duration.

RESULTS

In total, 33 (35.1%), 30 (31.9%), and 31 (33.0%) of 94 patients underwent surgery using general, local, and spinal anesthesia, respectively. The mean MMSE score did not differ among groups (p = 0.518). Cognitive decline was present in 18 (19.2%) patients, and the proportion did not significantly differ among groups. The complication rate did not differ between patients with and without cognitive decline. The mean surgery duration was similar among the three groups (p = 0.127). Group 2 had a lower mean postoperative VAS score, compared with the other groups (p < 0.001). Complications because of anesthesia and surgery were significantly more common in group 3 than in the other groups (p = 0.025). In the local anesthesia group, 7 patients had cognitive decline and 22 patients had normal cognition. There were no significant differences between patients with and without cognitive decline in terms of mean surgery duration (50.3 ± 15.4 min vs. 45.2 ± 10.7 min; p = 0.338) or mean VAS score (3.14 ± 0.90 vs. 3.13 ± 0.77; p = 0.985). Among the 22 and 7 patients without and with cognitive decline, 11 (50%) and 0 patients were discharged on the same day (p = 0.025). In the local anesthesia group, the respective median ages were 70, 52, and 59 years for patients with cognitive decline, patients with normal cognition discharged on the same day, and patients with normal cognition who were not discharged on the same day (p = 0.001).

CONCLUSION

Groin hernia repair was successfully performed under local anesthesia in all patients, including older patients with cognitive decline. Patients with cognitive decline were not discharged on the day of surgery, although the mean surgery duration and postoperative VAS score did not differ between patients with and without cognitive decline. Prolonged hospitalization in patients with cognitive decline may be related to their advanced age. Further studies are needed to determine the safety of same-day surgery in patients with cognitive decline.

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.

Bilateral inguinal hernia repair by laparoscopic totally extraperitoneal (TEP) vs. laparoscopic transabdominal preperitoneal (TAPP)

BACKGROUND

The guidelines recommend laparoscopic repair for bilateral inguinal hernia. However, few studies compare the totally extraperitoneal (TEP) and transabdominal preperitoneal (TAPP) techniques in bilateral inguinal hernias. This study aimed to compare the outcomes of TEP and TAPP in bilateral inguinal hernia.

METHODS

We conducted a retrospective cohort study of patients operated on for bilateral inguinal hernia by TEP and TAPP repair from 2016 to 2020. Intraoperative complications, operative time, acute postoperative pain, hospital stay, postoperative complications, chronic inguinal pain, and recurrence were compared.

RESULTS

A total of 155 patients were included in the study. TEP was performed in 71 patients (46%) and TAPP in 84 patients (54%). The mean operative time was longer in the TAPP group than in the TEP group (107 min vs. 82 min, p < 0.001). The conversion rate to open surgery was higher in the TEP group than in the TAPP group (8.5% vs. 0%, p = 0.008). The mean hospital stay was longer in the TAPP group than in the TEP group (p < 0.001). We did not observe significant differences in the proportion of postoperative complications (p = 0.672), postoperative pain at 24 h (p = 0.851), chronic groin pain (p = 0.593), and recurrence (p = 0.471). We did not observe an association between the choice of surgical technique (TEP vs. TAPP) with conversion rate, operative time, hospital stay, postoperative complications, chronic inguinal pain, or hernia recurrence when performing a multivariable analysis adjusted for the male sex, age, BMI, ASA, recurrent hernia repair, surgeon, and hernia size > 3cm.

CONCLUSIONS

Bilateral inguinal hernia repair by TEP and TAP presented similar outcomes in our study.

The incidence and impact of enterotomy during laparoscopic and robotic ventral hernia repair: a nationwide readmissions analysis

INTRODUCTION

Our aim was to define the national incidence of enterotomy (ENT) during minimally invasive ventral hernia repair (MIS-VHR) and evaluate impact on short-term outcomes.

METHODS

The 2016-2018 Nationwide Readmissions Database was queried using ICD-10 codes for MIS-VHR and enterotomy. All patients had 3-months follow-up. Patients were stratified by elective status; patients without ENT (No-ENT) were compared against ENT patients.

RESULTS

In total, 30,025 patients underwent LVHR and ENT occurred in 388 (1.3%) patients; 19,188 (63.9%) cases were elective including 244 elective-ENT patients. Incidence was similar between elective versus non-elective cohorts (1.27% vs 1.33%; p = 0.674). Compared to laparoscopy, ENT was more common during robotic procedures (1.2% vs 1.7%; p = 0.004). Comparison of elective-No-ENT vs elective-ENT showed that elective-ENT patients had a longer median LOS (2 vs 5 days; p < 0.001), higher mean hospital cost ($51,656 vs $76,466; p < 0.001), increased rates of mortality (0.3% vs 2.9%; p < 0.001), and higher 3-month readmission (10.1% vs 13.9%; p = 0.048). Non-elective cohort comparison demonstrated non-elective-ENT patients had a longer median LOS (4 vs 7 days; p < 0.001), higher mean hospital cost ($58,379 vs $87,850; p < 0.001), increased rates of mortality (0.7% vs 2.1%;p < 0.001), and higher 3-month readmission (13.6% vs 22.2%; p < 0.001). In multivariable analysis (odds ratio, 95% CI), higher odds of enterotomy were associated with robotic-assisted procedures (1.386, 1.095-1.754; p = 0.007) and older age (1.014, 1.004-1.024; p = 0.006). Lower odds of ENT were associated with BMI > 25 kg/m² (0.784, 0.624-0.984; p = 0.036) and metropolitan teaching vs metropolitan non-teaching (0.784, 0.622-0.987; p = 0.044). ENT patients (n = 388) were more likely to be readmitted with post-operative infection (1.9% vs 4.1%; p = 0.002) or bowel obstruction (1.0% vs 5.2%;p < 0.001) and more likely to undergo reoperation for intestinal adhesions (0.3% vs 1.0%; p = 0.036).

CONCLUSION

Inadvertent ENT occurred in 1.3% of MIS-VHRs, had similar rates between elective and urgent cases, but was more common for robotic procedures. ENT patients had a longer LOS, and increased cost and infection, readmission, re-operation and mortality rates.

Trends and predictors of laparoscopic bilateral inguinal hernia repair in Spain: a population-based study

BACKGROUND

International guidelines currently recommend laparoscopy for bilateral inguinal hernia repair (BIHR). Our study aims to evaluate the trends and factors associated with the choice of laparoscopy for BIHR in Spain.

METHODS

We performed a retrospective analysis of patients undergoing BIHR between 2016 and 2019. We used the national database of the Spanish Ministry of Health: RAE-CMBD. We performed a univariate and multivariable logistic regression analysis to identify the factors associated with the utilization of laparoscopy. We identified perioperative complications and the factors associated with their occurrence through multivariable logistic regression analysis.

RESULTS

A total of 21,795 BIHRs were performed: 84% by open approach and 16% by laparoscopic approach. Laparoscopic approach increased from 12% in 2016 to 23% in 2019 (p < 0.001). The 40% of hospitals did not use laparoscopy, and only 8% of the hospitals performed more than 50% of their BIHRs by laparoscopy. The utilization rate of laparoscopy was not related to the number of BIHRs performed per year (p = 0.145). The main factor associated with the choice of laparoscopy in multivariable logistic regression analysis was the patient's region of residence (OR 2.04, 95% CI 1.88-2.21). Other factors were age < 65 years (OR 1.65, 95% CI 1.52-1.79) and recurrent inguinal hernia (OR 1.31, 95% CI 1.15-1.49). The type of approach for BIHR was not independently associated with perioperative complications.

CONCLUSIONS

Despite a significant increase in recent years, laparoscopic BIHR in Spain remains low. The main factor associated with the utilization of laparoscopy was the patient's region of residence; this factor seems to be related to the presence of hospitals with a high rate of laparoscopic approaches where the patient lives. The type of approach was not independently associated with perioperative complications. More efforts are needed to increase laparoscopic use in patients with bilateral inguinal hernias.

Practical Mouse Model to Investigate Therapeutics for Staphylococcusaureus Contaminated Surgical Mesh Implants

INTRODUCTION

The use of prosthetic mesh in hernia repair provides a powerful tool to increase repair longevity, decrease recurrence rates, and facilitate complex abdominal wall reconstruction. Overall infection rates with mesh are low, but for those affected there is high morbidity and economic cost. The availability of a practicable small animal model would be advantageous for the preclinical testing of prophylactics, therapeutics, and new biomaterials. To this end, we have developed a novel mouse model for implantation of methicillin-resistant Staphylococcus aureus-infected surgical mesh and provide results from antibiotic and immunotherapeutic testing.

MATERIALS AND METHODS

Implantation of surgical mesh between fascial planes of the mouse hind limb was used to approximate hernia repair in humans. Surgical mesh was inoculated with methicillin-resistant Staphylococcus aureus to test the efficacy of antibiotic therapy with daptomycin and/or immunotherapy to induce macrophage phagocytosis using antibody blockade of the CD47 "don't eat me" molecule. Clinical outcomes were assessed by daily ambulation scores of the animals and by enumeration of mesh-associated bacteria at predetermined end points.

RESULTS

A single prophylactic treatment with daptomycin at the time of surgery led to improved ambulation scores and undetectable levels of bacteria in seven of eight mice by 21 days postinfection. Anti-CD47, an activator of macrophage phagocytosis, was ineffective when administered alone or in combination with daptomycin treatment. Ten days of daily antibiotic therapy begun 3 days after infection was ineffective at clearing infection.

CONCLUSIONS

This fast and simple model allows rapid in vivo testing of novel antimicrobials and immunomodulators to treat surgical implant infections.

Utilization of laparoscopic and open inguinal hernia repair at a large hernia center in China: a single-center observational study

BACKGROUND

The utilization of laparoscopic and open inguinal hernia repair in China remains unclear. We aim to investigate the rates of laparoscopic and open inguinal hernia repairs and its associated factors at a large hernia center.

METHODS

Data were obtained from the front sheet of medical records of Beijing Chaoyang hospital. Adult inguinal hernia inpatients who underwent hernia repairs between 2013 and 2020 were included. We calculated the overall rates of laparoscopic and open inguinal hernia repairs and compared the rate of laparoscopic repairs between different sex, age groups, types, and sides of inguinal hernias. Multivariable logistic regression was used to examine factors associated with the rate of laparoscopic repairs.

RESULTS

14,481 inpatients with inguinal hernia were included. 91.78% were male, 75.43% were more than 50 years, 75.20% were unilateral inguinal hernia, and 64.57% were indirect inguinal hernia. Overall, 49.47% underwent laparoscopic repairs and 50.53% underwent open repairs. Women had lower rate of laparoscopic repair than men, especially in those with unilateral hernias. Bilateral and direct inguinal hernia had higher rates of laparoscopic repair than unilateral and indirect inguinal hernia. Multivariable logistic regression showed that inpatients who were women, > 70 years, pantaloon inguinal hernia, with obstruction, and more comorbidities were less likely to have laparoscopic repairs.

CONCLUSION

Around 50% of inguinal hernia patients at a large hernia center underwent laparoscopic repairs, which was more commonly performed in male, young, bilateral inguinal hernia, and inpatients without comorbidities. More efforts were needed to increase the safe and effective laparoscopic utilization among female patients with inguinal hernias.

Learning curve of laparoscopic inguinal hernia repair: systematic review, meta-analysis, and meta-regression

BACKGROUND

Laparoscopic inguinal hernia repair has a long learning curve. It can be a technically challenging procedure and initially presents an unfamiliar view of inguinal anatomy. The aim of this review was to evaluate published literature relating to the learning curve of laparoscopic inguinal hernia repair and identify the number of cases required for proficiency. The secondary aim was to compare outcomes between surgeons before and after this learning curve threshold had been attained.

METHODS

A systematic literature search was conducted in databases of PubMed, Medline, Embase, Web of Science, and Cochrane Library, to identify studies that evaluated the learning curve of laparoscopic inguinal hernia repair. A meta-regression analysis was undertaken to identify the number of cases to achieve surgical proficiency, and a meta-analysis was performed to compare outcomes between cases that were undertaken during a surgeon's learning phase and experienced phase of the curve.

RESULTS

Twenty-two studies were included in this review, with 19 studies included in the meta-regression analysis, and 11 studies included in the meta-analysis. Mixed-effects Poisson regression demonstrated that there was a non-linear trend in the number of cases required to achieve surgical proficiency, with a 2.7% year-on-year decrease. The predicted number of cases to achieve surgical proficiency in 2020 was 32.5 (p < 0.01). The meta-analysis determined that surgeons in their learning phase may experience a higher rate of conversions to open (OR 4.43, 95% CI 1.65, 11.88), postoperative complications (OR 1.61, 95% CI 1.07, 2.42), and recurrences (OR 1.32, 95% CI 0.40, 4.30).

CONCLUSION

Laparoscopic inguinal hernia repair has a well-defined learning curve. While learning surgeons demonstrated reasonable outcomes, supervision during this period may be appropriate given the increased risk of conversion to open surgery. These data may benefit learning surgeons in the skill development of minimally invasive inguinal hernia repairs.

The transition from open to laparoscopic surgery for bilateral inguinal hernia repair: how we did it

PURPOSE

To describe the transition process from open repair (OR) to laparoscopic repair (LR) of bilateral inguinal hernia in a small basic general hospital METHODS: We describe the technical details and training strategy used to facilitate the transition to systematic LR of bilateral inguinal hernia. We conducted a retrospective analysis of prospectively collected data from all patients undergoing bilateral inguinal hernia repair between January 2017 and December 2020. We analysed the evolution of LR and compared the surgical outcomes: complications, acute pain (24 h), chronic pain (> 3 months), and recurrence (1 year) of the patients operated on by OR and LR.

RESULTS

We performed 132 bilateral inguinal hernia repairs, 55 (41.7%) ORs, and 77 (58.3%) LRs. A significant difference was observed in the choice of LR over time (2017: 9%, 2018: 32%, 2019: 75%, 2020: 91%, p < 0.001). The mean operative time was shorter in the OR group than in the LR group (56 min vs. 108 min, p < 0.001). However, the operative time of the LR decreased over the years. No significant differences were observed in complications or recurrence. LR was associated with lower acute postoperative pain at 24 h (2.2 vs. 3.1 points, p = 0.021) and lower chronic groin pain than OR (1.3% vs. 12.7%, p = 0.009).

CONCLUSION

A structured and systematized training process made the transition from OR to LR of bilateral inguinal hernias feasible and safe in a small basic general hospital. This transition did not increase complications or recurrence. Additionally, LR was associated with a decrease in postoperative pain and chronic groin pain.

Increasing volume but declining resident autonomy in laparoscopic inguinal hernia repair: an inverse relationship

INTRODUCTION

With improved technology and technique, laparoscopic inguinal hernia repair (LIHR) has become a valid option for repairing both initial and recurrent inguinal hernia. Surgical residents must learn both techniques to prepare for future practice. We examined resident operative autonomy between LIHR and open inguinal hernia repair (OIHR) across the Veterans Affairs (VA) system.

METHODS

Utilizing the VA Surgical Quality Improvement Program database, we examined inguinal hernia repairs based on the principal procedure code at all teaching VA hospitals from July 2004 to September 2019. All VA cases are coded for level of supervision at the time of surgery: attending primary surgeon (AP); attending scrubbed but resident is a primary surgeon (AR), and resident primary with attending supervising but not scrubbed (RP). Primary outcomes were the proportion of LIHR versus OIHR and resident autonomy over time.

RESULTS

A total of 127,497 hernia repair cases were examined (106,892 OIHR and 20,605 LIHR). There was a higher proportion of RP (8.7% vs 2.2%) and lower proportion of AP (23.9% vs 28.4%) within OIHR compared to LIHR (p < 0.001). The overall proportion of LIHR repairs increased from 9 to 28% (p < 0.001). RP cases decreased for LIHR from 9 to 1% and for OIHR from 17 to 4%, while AP cases increased for LIHR from 16 to 42% and for OIHR from 18 to 30% (all p < 0.001). For RP cases, mortality (0 vs 0.2%, p > 0.99) and complication rates (1.1% vs. 1.7%, p = 0.35) were no different.

CONCLUSIONS

LIHR at VA hospitals has tripled over the past 15 years, now compromising nearly one-third of all inguinal hernia repairs; the majority are initial hernias. Despite this increase, resident autonomy in LIHR cases declined alarmingly. The results demonstrate an urgent need to integrate enhanced minimally invasive training into a general surgery curriculum to prepare residents for future independent practice.

Risks and Prevention of Surgical Site Infection After Hernia Mesh Repair and the Predictive Utility of ACS-NSQIP

AIM

The aim of this paper was to provide a narrative review of surgical site infection after hernia surgery and the influence of perioperative preventative interventions.

METHODS

The review was based on current national and international guidelines and a literature search.

RESULTS

Mesh infection is a highly morbid complication after hernia surgery, and is associated with hospital re-admission, increased health care costs, re-operation, hernia recurrence, impaired quality of life and plaintiff litigation. The American College of Surgeons National Surgical Quality Improvement Program is a particularly useful resource for the study and evidence-based practise of abdominal wall hernia repair.

DISCUSSION

The three major modifiable patient comorbidities significantly associated with postoperative surgical site infection in hernia surgery are obesity, tobacco smoking and diabetes mellitus. Preoperative optimization includes weight loss, cessation of smoking, and control of diabetes. Intraoperative interventions relate, in particular, to the control of fomite mediated transmission in the operating theatre and prevention of mesh contamination with S. aureus CFUs. Risk management strategies should also target the niche ecological conditions which enable bacterial survival and subsequent biofilm formation on an implanted mesh. Outcomes of mesh infection after hernia surgery are closely related to mesh type and porosity, patient smoking status, presence of MRSA, bacterial adhesion and biofilm production. The use of suction drains and the timing of drain removal are controversial and discussed in detail. Finally, the utility of the ACS-NSQIP Surgical Risk Calculator in predicting complications and outcomes in individual patients and the importance of quality improvement initiatives in surgical units are emphasized.

General Surgery: Management of Postoperative Complications Following Ventral Hernia Repair and Inguinal Hernia Repair

Ventral and inguinal hernia repairs are some of the most commonly performed general surgery operations worldwide. This review focuses on the management of postoperative complications, which include surgical site infection, hernia recurrence, postoperative pain, and mesh-related issues. In each section, we aim to discuss classifications, risk factors, diagnostic modalities, and treatment options for common complications following hernia repair.