Open randomized clinical trial of laparoscopic versus open incisional hernia repair

Year-Over-Year Ventral Hernia Recurrence Rates and Risk Factors

Importance

Recurrence is one of the most challenging adverse events after ventral hernia repair as it impacts quality of life, utilization of resources, and subsequent need for re-repair. Rates of recurrence range from 30% to 80% after ventral hernia repair.

Objective

To determine the contemporary ventral hernia recurrence rate over time in patients with previous hernia repair and to determine risk factors associated with recurrence.

Design, Setting, and Participants

This retrospective, population-based study used the Abdominal Core Health Quality Collaborative registry to evaluate year-over-year recurrence rates in patients with prior ventral hernia repair between January 2012 and August 2022. Patients who underwent at least 1 prior ventral hernia repair were included and categorized into 2 groups based on mesh or no-mesh use. There were 43 960 eligible patients; after exclusion criteria (patients with concurrent inguinal hernias as the primary diagnosis, nonstandard hernia procedure categories, American Society of Anesthesiologists class unassigned, or no follow-up), 29 834 patients were analyzed in the mesh group and 5599 in the no-mesh group.

Main Outcomes and Measures

Ventral hernia recurrence rates. Risk factors analyzed include age, body mass index, sex, race, insurance type, medical comorbidities, American Society of Anesthesiologists class, smoking, indication for surgery, concomitant procedure, hernia procedure type, myofascial release, fascial closure, fixation type, number of prior repairs, hernia width, hernia length, mesh width, mesh length, operative approach, prior mesh placement, prior mesh infection, mesh location, mesh type, postoperative surgical site occurrence, postoperative surgical site infection, postoperative seroma, use of drains, and reoperation.

Results

Among 29 834 patients with mesh, the mean (SD) age was 57.17 (13.36) years, and 14 331 participants (48.0%) were female. Among 5599 patients without mesh, the mean (SD) age was 51.9 (15.31) years, and 2458 participants (43.9%) were female. When comparing year-over-year hernia recurrence rates in patients with and without prior mesh repair, respectively, the Kaplan Meier analysis showed a recurrence rate of 201 cumulative events with 13 872 at risk (2.8%) vs 104 cumulative events with 1707 at risk (4.0%) at 6 months; 411 cumulative events with 4732 at risk (8.0%) vs 184 cumulative events with 427 at risk (32.6%) at 1 year; 640 cumulative events with 1518 at risk (19.7%) vs 243 cumulative events with 146 at risk (52.4%) at 2 years; 731 cumulative events with 670 at risk (29.3%) vs 258 cumulative events with 73 at risk (61.4%) at 3 years; 777 cumulative events with 337 at risk (38.5%) vs 267 cumulative events with 29 at risk (71.2%) at 4 years; and 798 cumulative events with 171 at risk (44.9%) vs 269 cumulative events with 19 at risk (73.7%) at 5 years. Higher body mass index; immunosuppressants; incisional and parastomal hernias; a robotic approach; greater hernia width; use of a biologic or resorbable synthetic mesh; and complications, such as surgical site infections and reoperation, were associated with higher odds of hernia recurrence. Conversely, greater mesh width, myofascial release, and fascial closure had lower odds of recurrence. Hernia type was the most important variable associated with recurrence.

Conclusions and Relevance

In this study, the 5-year recurrence rate after ventral hernia repair was greater than 40% and 70% in patients with and without mesh, respectively. Rates of ventral hernia recurrence increased over time, underscoring the importance of close, long-term follow up in this population.

The Utilization of Laparoscopic Ventral Hernia Repair (LVHR) in Incarcerated and Strangulated Cases: A National Trend in Outcomes

INTRODUCTION

Early after its adoption, minimally invasive surgery had limited usefulness in emergent cases. However, with improvements in equipment, techniques, and skills, laparoscopy in complex and emergency operations expanded substantially. This study aimed to examine the trend of laparoscopy in incarcerated or strangulated ventral hernia repair (VHR) over time.

METHODS

The American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database was queried for laparoscopic repair of incarcerated and strangulated hernias (LIS-VHR) and compared over 2 time periods, 2014-2016 and 2017-2019.

RESULTS

The utilization of laparoscopy in all incarcerated or strangulated VHR increased over time (2014-2016: 39.9% (n = 14 075) vs 2017-2019: 46.3% (n = 18 369), P < .001). Though likely not clinically significant, demographics and comorbidities statistically differed between groups (female: 51.7% vs 50.0%, P = .003; age 54.5 ± 13.7 vs 55.4 ± 13.8 years, P < .001; BMI 34.9 ± 8.0 vs 34.6 ± 7.8 kg/m2, P < .001). Patients from 2017 to 2019 were less comorbid (18.9% vs 16.8% smokers, P < .001; 18.2% vs 17.3% diabetic, P = .036; 4.6% vs 4.1% COPD, P = .021) but had higher ASA classification (III: 43.3% vs 45.7%; IV: 2.5% vs 2.7%, P < .001). Hernia types (primary, incisional, recurrent) were similar in each group. Operative time (89.7 ± 59.3 vs 97.4 ± 63.4 min, P < .001) became longer but length-of-stay (1.4 ± 3.3 vs 1.1 ± 2.6 days, P < .001) decreased. There was no statistical difference in surgical complications, medical complications, reoperation, or readmission rates between periods.

CONCLUSION

Laparoscopic VHR has become a routine method for treating incarcerated and strangulated hernias, and its utilization continues to increase over time. Clinical outcomes have remained the same while hospital stays have decreased.

Comparison between the open and the laparoscopic approach in the primary ventral hernia repair: a systematic review and meta-analysis

BACKGROUND

Ventral hernia repair underwent various developments in the previous decade. Laparoscopic primary ventral hernia repair may be an alternative to open repair since it prevents large abdominal incisions. However, whether laparoscopy improves clinical outcomes has not been systematically assessed.

OBJECTIVES

The aim is to compare the clinical outcomes of the laparoscopic versus open approach of primary ventral hernias.

METHODS

A systematic search of MEDLINE (PubMed), Scopus, Web of Science, and Cochrane Central Register of Controlled Trials was conducted in February 2023. All randomized controlled trials comparing laparoscopy with the open approach in patients with a primary ventral hernia were included. A fixed-effects meta-analysis of risk ratios was performed for hernia recurrence, local infection, wound dehiscence, and local seroma. Meta-analysis for weighted mean differences was performed for postoperative pain, duration of surgery, length of hospital stay, and time until return to work.

RESULTS

Nine studies were included in the systematic review and meta-analysis. The overall hernia recurrence was twice less likely to occur in laparoscopy (RR = 0.49; 95%CI = 0.32-0.74; p < 0.001; I2 = 29%). Local infection (RR = 0.30; 95%CI = 0.19-0.49; p < 0.001; I2 = 0%), wound dehiscence (RR = 0.08; 95%CI = 0.02-0.32; p < 0.001; I2 = 0%), and local seroma (RR = 0.34; 95%CI = 0.19-0.59; p < 0.001; I2 = 14%) were also significantly less likely in patients undergoing laparoscopy. Severe heterogeneity was obtained when pooling data on postoperative pain, duration of surgery, length of hospital stay, and time until return to work.

CONCLUSION

The results of available studies are controversial and have a high risk of bias, small sample sizes, and no well-defined protocols. However, the laparoscopic approach seems associated with a lower frequency of hernia recurrence, local infection, wound dehiscence, and local seroma.

The INCH-trial: a multicenter randomized controlled trial comparing short- and long-term outcomes of open and laparoscopic surgery for incisional hernia repair

BACKGROUND

Laparoscopic incisional hernia repair is increasingly performed worldwide and expected to be superior to conventional open repair regarding hospital stay and quality of life (QoL). The INCisional Hernia-Trial was designed to test this hypothesis.

METHODS

A multicenter parallel randomized controlled open-label trial with a superiority design was conducted in six hospitals in the Netherlands. Patients with primary or recurrent incisional hernias were randomized by computer-guided block-randomization to undergo either conventional open or laparoscopic repair. Primary endpoint was postoperative length of hospital stay in days. Secondary endpoints included QoL, complications, and recurrences. Patients were followed up for at least 5 years.

RESULTS

Hundred-and-two patients were recruited and randomized. In total, 88 patients underwent surgery and were included in the intention-to-treat analysis (44 in the open group, 44 in the laparoscopic group). Mean age was 59.5 years, gender division was equal, and BMI was 28.8 kg/m. The trial was concluded early for futility after an unplanned interim analysis, which showed that the hypothesis needed to be rejected. There was no difference in primary outcome: length of hospital stay was 3 (range 1-36) days in the open group and 3 (range 1-12) days in the laparoscopic group (p = 0.481). There were no significant between-group differences in QoL questionnaires on the short and long term. Satisfaction was impaired in the open group. Overall recurrence rate was 19%, of which 16% in the open and 23% in the laparoscopic group (p = 0.25) at a mean follow-up of 6.6 years.

CONCLUSIONS

In a randomized controlled trial, short- and long-term outcomes after laparoscopic incisional hernia repair were not superior to open surgery. The persisting high recurrence rates, reduced QoL, and suboptimal satisfaction warrant the need for patient's expectation management in the preoperative process and individualized surgical management.

TRIAL REGISTRATION

Netherlands Trial Register NTR2808.

Laparoscopic vs open repair for primary midline ventral hernia: a prospective cohort study

BACKGROUND

The optimal operative treatment for umbilical and epigastric hernia, i.e., primary midline ventral hernia (PMVH), is debatable. The most common techniques are the primary suture and open repair with mesh, while laparoscopic approach using intraperitoneally placed onlay mesh (IPOM) is less frequent. The aim of this study was to examine the outcomes of IPOM in PMVH. Perioperative results, recurrence, pain, and functional status were studied.

METHODS

This single-center prospective cohort study included consecutive patients with PMVH operated between September 2006 and December 2015. Systematic follow-up was conducted 6 months and 2 and 5 years postoperatively.

RESULTS

Seven hundred fifty-four patients underwent PMVH repair. Open repair without mesh, open repair with mesh, and IPOM were performed in 251 (34.9%), 273 (38%), and 195 (27.1%) patients, respectively. In the unmatched cohort, the incidence of postoperative complications was similar except postoperative seroma, which was more frequent after IPOM. The latter was also associated with longer length of stay. Open repair with mesh was associated with significantly lower recurrence compared with open repair without mesh and IPOM (5.2 vs 18.2 vs 13.8%, p=0.001, respectively). No differences were seen between the groups in terms of visual analog scale used for registering postoperative pain. These observations persisted after applying propensity score matching. In the multivariable analysis, open repair without mesh and IPOM significantly correlated with recurrence.

CONCLUSIONS

In PMVH, open repair with mesh is associated with lower recurrence compared with open repair without mesh and IPOM. Pain, postoperative complications (except for seroma), and functional status are similar.

Laparoscopic treatment of ventral hernias: the Italian national guidelines

Primary and incisional ventral hernias are significant public health issues for their prevalence, variability of professional practices, and high costs associated with the treatment In 2019, the Board of Directors of the Italian Society for Endoscopic Surgery (SICE) promoted the development of new guidelines on the laparoscopic treatment of ventral hernias, according to the new national regulation. In 2022, the guideline was accepted by the government agency, and it was published, in Italian, on the SNLG website. Here, we report the adopted methodology and the guideline's recommendations, as established in its diffusion policy. This guideline is produced according to the methodology indicated by the SNGL and applying the Grading of Recommendations, Assessment, Development, and Evaluations (GRADE) methodology. Fifteen recommendations were produced as a result of 4 PICO questions. The level of recommendation was conditional for 12 of them and conditional to moderate for one. This guideline's strengths include relying on an extensive systematic review of the literature and applying a rigorous GRADE method. It also has several limitations. The literature on the topic is continuously and rapidly evolving; our results are based on findings that need constant re-appraisal. It is focused only on minimally invasive techniques and cannot consider broader issues (e.g., diagnostics, indication for surgery, pre-habilitation).

Predictive factors of recurrence for laparoscopic repair of primary and incisional ventral hernias with single mesh from a multicenter study

Laparoscopic ventral hernia repair (LVHR) is a widely practiced treatment for primary (PH) and incisional (IH) hernias, with acceptable outcomes. Prevention of recurrence is crucial and still highly debated. Purpose of this study was to evaluate predictive factors of recurrence following LVHR with intraperitoneal onlay mesh with a single type of mesh for both PH and IH. A retrospective, multicentre study of data collected from patients who underwent LVHR for PH and IH with an intraperitoneal monofilament polypropylene mesh from January 2014 to December 2018 at 8 referral centers was conducted, and statistical analysis for risk factors of recurrence and post-operative outcomes was performed. A total of 1018 patients were collected, with 665 cases of IH (65.3%) and 353 of PH (34.7%). IH patients were older (p < 0.001), less frequently obese (p = 0.031), at higher ASA class (p < 0.001) and presented more frequently with large, swiss cheese type and border site defects (p < 0.001), compared to PH patients. Operative time and hospital stay were longer for IH (p < 0.001), but intraoperative and early post-operative complications and reinterventions were comparable. IH group presented at major risk of recurrence than PH (6.7% vs 0.9%, p < 0.001) and application of absorbable tacks resulted a significative predictive factor for recurrence increasing the risk by 2.94 (95% CI 1.18–7.31). LVHR with a light-weight polypropylene mesh has low intra- and post-operative complications and is appropriate for both IH and PH. Non absorbable tacks and mixed fixation system seem to be preferable to absorbable tacks alone.

Hybrid operation technique for incisional hernia repair: a systematic review and meta-analysis of intra- and postoperative complications

Background

Incisional hernia (IH) occurs approximately in 15% of patients after midline surgery. Surgical treatment for IHs include a solely open or solely laparoscopic approach with mesh placement. Recently, hybrid (combined laparoscopic and open) approaches have been introduced. This systematic review evaluates perioperative complications of hybrid incisional hernia repair (HIHR).

Methods

EMBASE, Medline via OvidSP, Web of Science, Cochrane and Google Scholar databases were searched. Studies providing data on intra- and postoperative complications in patients who underwent HIHR were included. Data on intra- and postoperative complications were extracted and meta-analyses were performed. Study quality was assessed with the Newcastle Ottowa Scale, ROBINS-I tool, and Cochrane risk of bias. PROSPERO registration: CRD42020175053.

Results

Eleven studies (n = 1681 patients) were included. Five studies compared intra-operative complications between HIHR and laparoscopic incisional hernia repair (LIHR) with a pooled incidence of 1.8% in HIHR group and 2.8% in LIHR group (p = 0.13). Comparison of postoperative prevalence of surgical site occurrences (SSOs) (23% versus 26%, p = 0.02) and surgical site occurrences requiring interventions (SSOPIs) (1.5% versus 4.1%, p < 0.01) were in favour of the HIHR group. Overall postoperative complications seemed to occur less frequent in the HIHR group, though no hard statements could be made due to the vast heterogeneity in reporting between studies.

Conclusion

Although the majority of studies were retrospective and included a small number of patients, HIHR seemingly led to less SSOs and SSOPIs. This systematic review forms a strong invitation for more randomized controlled trials to confirm the benefits of this approach.

Supplementary Information

The online version contains supplementary material available at 10.1007/s10029-021-02497-3.

Laparoscopic Versus Open Incisional Hernia Repair: Long-Term Follow-up Results of a Randomized Clinical Trial

PURPOSE

Long-term extension of a previous randomized controlled clinical trial comparing open (OVHR) vs. laparoscopic (LVHR) ventral hernia repair, assessing recurrence, reoperation, mesh-related complications and self-reported quality of life with 10 years of follow-up.

METHODS

Eighty-five patients were followed up to assess recurrence (main endpoint), reoperation, mesh complications and death, from the date of index until recurrence, death or study completion, whichever was first. Recurrence, reoperation rates and death were estimated by intention to treat. Mesh-related complications were only assessed in the LVHR group, excluding conversions (intraperitoneal onlay; n = 40). Quality of life, using the European Hernia Society Quality of Life score, was assessed in surviving non-reoperated patients (n = 47).

RESULTS

The incidence rates with 10 person-years of follow-up were 21.01% (CI 13.24-33.36) for recurrence, 11.92% (CI: 6.60-21.53) for reoperation and 24.88% (CI 16.81-36.82) for death. Sixty-two percent of recurrences occurred within the first 2 years of follow-up. No significant differences between arms were found in any of the outcomes analyzed. Incidence rate of intraperitoneal mesh complications with 10 person-years of follow-up was 6.15% (CI 1.99-19.09). The mean EuraHS-QoL score with 13.8 years of mean follow-up for living non-reoperated patients was 6.63 (CI 4.50-8.78) over 90 possible points with no significant differences between arms.

CONCLUSION

In incisional ventral hernias with wall defects up to 15 cm wide, laparoscopic repair seems to be as safe and effective as open techniques, with no long-term differences in recurrence and reoperation rates or global quality of life, although lack of statistical power does not allow definitive conclusions on equivalence between alternatives.

TRIAL REGISTRATION NUMBER

ClinicalTrial.gov (NCT04192838).

Quality of Life Using the Carolinas Comfort Scale for Laparoscopic Incisional Hernia Repair: A 12-Year Experience in a Retrospective Observational Study

Background: Incisional hernias are a common complication of abdominal surgery (10%-35%) and are notorious for recurrence. Laparoscopic incisional hernia repair (LIHR) was first performed in 1991 and is reported to have lower recurrence rates. Few studies to date have assessed quality of life (QoL) resulting from a repair. The purpose of this observational study was to present a 12-year experience performing LIHR, with a focus on the impact on QoL. Methods: All adult patients undergoing elective LIHR performed by a single surgeon, whether primary or recurrent, were included in the study. The data collection was performed prospectively between 2007 and 2019 to include demographic details, intraoperative findings and postoperative short- and longterm outcomes. We used the Carolinas Comfort Scale (CCS) to assess QoL following surgery. Results: Ninety-seven patients were included in the study. Patients had a median age of 57 years, body mass index of 32 kg/m², 35% were male and 88% were American Society of Anesthesiologists (ASA) class I or II. The duration of surgery was 90 minutes*. Nineteen percent of patients had complications during or after surgery; 1 (1%) had recurrence. length of stay in hospital was 1* (0-12) days and long-term follow-up period was 42* (2-140) months after surgery. Time of return to daily activities was 14* (1-365) days. Eighty-six percent of patients rated their experience undergoing LIHR as "Excellent" or "Good". Regarding QoL after surgery, scores on the CCS indicated that 82% of patients had minimal or no discomfort following surgery, and only 1% had significant discomfort. *Presented as median. Conclusions: The technique for LIHR displayed in this study is safe and effective. There was an acceptable rate of complications, with a low recurrence rate. Patients were highly satisfied and had a good QoL after the procedure. Research Registry ID Number: researchregistry6056.

Minimally invasive repair of ventral hernia with one third of tackers and fibrin glue: less pain and same recurrence rate

BACKGROUND

Aim of this study was to assess whether the reduction in the number of tackers maintains a similar recurrence rate and to subsequently evaluate whether this reduction associated with fibrin adhesive (FA) influences postsurgical pain after laparoscopic ventral hernia repair (LVHR) at 5 years follow-up.

METHODS

Fifty patients with ventral hernia (intervention group) underwent to LVHR with the double crown (DC) technique with a decrease in the number of tackers, each tacker being separated by about 3 cm associated with FA to seal the spaces between them. Data obtained from intervention group were compared to data obtained from a historical series of 50 patients (control group) undergoing LVHR using DC technique with tackers at 1 cm each other.

RESULTS

No statistically significant differences were found between groups about patients' characteristics. Mean hospital stay was 2 days. Statistically significant differences were observed about hospital stay between both groups U-Mann-Whitney ([UMW] =345, P=0) being higher in the control group. Statistically significant difference was observed in the postoperative pain evaluated by the visual analogical scale (VAS) score, having 95% of patients in the control group with VAS less than or equal to 7 compared to 4.55 in the intervention group. Recurrence rate was 4.1% for the control group versus 4.2% in the intervention group.

CONCLUSIONS

The reduction of metallic tackers associated with FA does not present statistically significant differences in the recurrence rate in comparison to conventional DC technique. In the intervention group a reduction in postoperative pain and hospital stay were observed.

Patient-Reported Outcomes of Robotic vs Laparoscopic Ventral Hernia Repair With Intraperitoneal Mesh: The PROVE-IT Randomized Clinical Trial

Importance

Despite rapid adoption of the robotic platform for ventral hernia repair with intraperitoneal mesh in the United States, there is no level I evidence comparing it with the traditional laparoscopic approach. This randomized clinical trial sought to demonstrate a clinical benefit to the robotic approach.

Objective

To determine whether robotic approach to ventral hernia repair with intraperitoneal mesh would result in less postoperative pain.

Design, Setting, and Participants

A registry-based, single-blinded, prospective randomized clinical trial at the Cleveland Clinic Center for Abdominal Core Health, Cleveland, Ohio, completed between September 2017 and January 2020, with a minimum follow-up duration of 30 days. Two surgeons at 1 academic tertiary care hospital. Patients with primary or incisional midline ventral hernias of an anticipated width of 7 cm or less presenting in the elective setting and able to tolerate a minimally invasive repair.

Interventions

Patients were randomized to a standardized laparoscopic or robotic ventral hernia repair with fascial closure and intraperitoneal mesh.

Main Outcomes and Measures

The trial was powered to detect a 30% difference in the Numerical Rating Scale (NRS-11) on the first postoperative day. Secondary end points included the Patient-Reported Outcomes Measurement Information System Pain Intensity short form (3a), hernia-specific quality of life, operative time, wound morbidity, recurrence, length of stay, and cost.

Results

Seventy-five patients completed their minimally invasive hernia repair: 36 laparoscopic and 39 robotic. Baseline demographics and hernia characteristics were comparable. Robotic operations had a longer median operative time (146 vs 94 minutes; P < .001). There were 2 visceral injuries in each cohort but no full-thickness enterotomies or unplanned reoperations. There were no significant differences in NRS-11 scores preoperatively or on postoperative days 0, 1, 7, or 30. Specifically, median NRS-11 scores on the first postoperative day were the same (5 vs 5; P = .61). Likewise, postoperative Patient-Reported Outcomes Measurement Information System 3a and hernia-specific quality-of-life scores, as well as length of stay and complication rates, were similar. The robotic platform adds cost (total cost ratio, 1.13 vs 0.97; P = .03), driven by the cost of additional operating room time (1.25 vs 0.85; P < .001).

Conclusions and Relevance

Laparoscopic and robotic ventral hernia repair with intraperitoneal mesh have comparable outcomes. The increased operative time and proportional cost of the robotic approach are not offset by a measurable clinical benefit.

Trial Registration

ClinicalTrials.gov Identifier: NCT03283982.

A new three-step hybrid approach is a safe procedure for incisional hernia: early experiences with a single centre retrospective cohort

Purpose

In this study, a three-step novel surgical technique was developed for incisional hernia, in which a laparoscopic procedure with a mini-laparotomy is combined: so-called ‘three-step incisional hybrid repair’. The aim of this study was to reduce the risk of intestinal lacerations during adhesiolysis and recurrence rate by better symmetrical overlap placement of the mesh.

Objectives

To evaluate first perioperative outcomes with this technique.

Methods

From 2016 to 2020, 70 patients (65.7% females) with an incisional hernia of > 2 and ≤ 10 cm underwent a elective three-step incisional hybrid repair in two non-academic hospitals performed by two surgeons specialised in abdominal wall surgery. Intra- and postoperative complications, operation time, hospitalisation time and hernia recurrence were assessed.

Results

Mean operation time was 100 min. Mean hernia size was 4.8 cm; 45 patients (64.3%) had a hernia of 1–5 cm, 25 patients (35.7%) of 6–10 cm. Eight patients had a grade 1 complication (11.4%), five patients a grade 2 (7.1%), two patients (2.8%) a grade 4 complication and one patient (1.4%) a grade 5 complication. Five patients had an intraoperative complication (7.0%), two enterotomies, one serosa injury, one omentum bleeding and one laceration of an epigastric vessel. Mean length of stay was 3.3 days. Four patients (5.6%) developed a hernia recurrence during a mean follow-up of 19.5 weeks.

Conclusion

A three-step hybrid incisional hernia repair is a safe alternative for incisional hernia repair. Intraoperative complications rate was low.

Clinical outcomes and quality of life associated with the use of a biosynthetic mesh for complex ventral hernia repair: analysis of the "Italian Hernia Club" registry

With the development of newer meshes and approaches to hernia repair, it is currently difficult to evaluate their performances while considering the patients' perspective. The aim of the study was to assess the clinical outcomes and quality of life consequences of abdominal hernia repairs performed in Italy using Phasix and Phasix ST meshes through the analysis of real-world data to support the choice of new generation biosynthetic meshes. An observational, prospective, multicentre study was conducted in 10 Italian clinical centres from May 2015 to February 2018 and in 15 Italian clinical centres from March 2018 to May 2019. The evaluation focused on patients with VHWG grade II-III who underwent primary ventral hernia repair or incisional hernia intervention with a follow-up of at least 18 months. Primary endpoints included complications' rates, and secondary outcomes focused on patient quality of life as measured by the EuroQol questionnaire. Seventy-five patients were analysed. The main complications were: 1.3% infected mesh removal, 4.0% superficial infection requiring procedural intervention, 0% deep/organ infection, 8.0% recurrence, 5.3% reintervention, and 6.7% drained seroma. The mean quality of life utility values ranged from 0.768 (baseline) to 0.967 (36 months). To date, Phasix meshes have proven to be suitable prostheses in preventing recurrence, with promising outcomes in terms of early and late complications and in improving patient quality of life.

Surgical site occurrences, not body mass index, increase the long-term risk of ventral hernia recurrence

BACKGROUND

Recurrence rates after ventral hernia repair vary widely and evidence about risk factors for recurrence are conflicting. There is little evidence for risk factors for long-term recurrence.

METHODS

Patients who underwent ventral hernia repair at our institution and were captured in the American College of Surgeons-National Surgical Quality Improvement Program database between 2002 and 2015 were included. We reviewed all demographic, procedural, and hernia-specific data.

RESULTS

Six hundred and thirty patients were included for analysis with a median follow-up of 4.9 years (inter-quartile range, 2-7.3 years). By univariate analysis, index hernia repairs were more likely to recur if defect size was ≥4 cm (P = .019), no mesh was used (P = .026), or if the repair was for a recurrent hernia (P = .001). Five-year cumulative incidence of recurrence and reoperation was 24.3% and 16.0%, respectively. Patients with a perioperative surgical site occurrence, which included superficial, deep-incisional, and organ space surgical site infections as well as wound disruption, had a 5-year cumulative incidence of recurrence of 54.9% compared with 22.6% for those without surgical site occurrence. By multivariable analysis, non-primary hernia repair (hazard ratio 1.7, 95% confidence interval 1.2-2.4, P = .005) and any postoperative surgical site occurrence (hazard ratio 1.9, 95% confidence interval 1.1-3.6, P = .02) were the only risk factors predictive of recurrence. Patient body mass index had no independent effect on recurrence.

CONCLUSION

1 in 4 patients undergoing an open ventral hernia repair will have a recurrence after 5 years, and this risk is doubled among patients who experience any perioperative surgical site occurrence. After controlling for patient comorbidities, including body mass index, hernia size, and mesh position, the most significant risk factor for recurrence after ventral hernia repair was a non-primary hernia and surgical site occurrence.

International classification of abdominal wall planes (ICAP) to describe mesh insertion for ventral hernia repair

BACKGROUND

Nomenclature for mesh insertion during ventral hernia repair is inconsistent and confusing. Several terms, including 'inlay', 'sublay' and 'underlay', can refer to the same anatomical planes in the indexed literature. This frustrates comparisons of surgical practice and may invalidate meta-analyses comparing surgical outcomes. The aim of this study was to establish an international classification of abdominal wall planes.

METHODS

A Delphi study was conducted involving 20 internationally recognized abdominal wall surgeons. Different terms describing anterior abdominal wall planes were identified via literature review and expert consensus. The initial list comprised 59 possible terms. Panellists completed a questionnaire that suggested a list of options for individual abdominal wall planes. Consensus on a term was predefined as occurring if selected by at least 80 per cent of panellists. Terms scoring less than 20 per cent were removed.

RESULTS

Voting started August 2018 and was completed by January 2019. In round 1, 43 terms (73 per cent) were selected by less than 20 per cent of panellists and 37 new terms were suggested, leaving 53 terms for round 2. Four planes reached consensus in round 2, with the terms 'onlay', 'inlay', 'preperitoneal' and 'intraperitoneal'. Thirty-five terms (66 per cent) were selected by less than 20 per cent of panellists and were removed. After round 3, consensus was achieved for 'anterectus', 'interoblique', 'retro-oblique' and 'retromuscular'. Default consensus was achieved for the 'retrorectus' and 'transversalis fascial' planes.

CONCLUSION

Consensus concerning abdominal wall planes was agreed by 20 internationally recognized surgeons. Adoption should improve communication and comparison among surgeons and research studies.

Retroprosthetic Seroma After Laparoscopic Ventral Hernia Repair Is Related to Mesh Used?

Purpose: Retroprosthetic seroma (RS) is defined as a fluid collection located between the abdominal viscera and the intraperitoneal mesh implanted during surgery. Aim of this study is to report the incidence and clinical impact of RS based on the type of mesh implanted during laparoscopic ventral hernia repair (LVHR). Materials and Methods: Patients who underwent LVHR were allocated in group A if expanded polytetrafluoroethylene (ePTFE) mesh was used during surgery and in group B if other types of mesh were used. Patients were evaluated on postoperative day (POD) 1 and 7 with physical examination and 1 month after surgery by physical examination and with an abdominal computed tomography scan, respectively. Results: Sixty patients were included. Of these 41 patients (68.3%) were included in group A and 19 patients (31.7%) in group B. Signs of RS were not observed in any patient on POD 7. One month after surgery, RS was observed in 13 patients (21.6%). One patient (7.7%) with RS experienced great discomfort and mesh detachment, and underwent a second surgical treatment. All RSs were observed in group A, and the difference with group B was statistically significant (P = .005). Conclusions: The use of ePTFE mesh is related to the development of RS. The treatment of choice without clinical symptoms should be conservative. Randomized control trial and prospective studies with a larger sample size and control group are required to confirm these data, although this study shows a high evidence of the relation of RS and the type of mesh.

Management of Reducible Ventral Hernias: Clinical Outcomes and Cost-effectiveness of Repair at Diagnosis Versus Watchful Waiting

OBJECTIVE

To compare long-term clinical and economic outcomes associated with 3 management strategies for reducible ventral hernia: repair at diagnosis (open or laparoscopic) and watchful waiting.

BACKGROUND

There is variability in ventral hernia management. Recent data suggest watchful waiting is safe; however, long-term clinical and economic outcomes for different management strategies remain unknown.

METHODS

We built a state-transition microsimulation model to forecast outcomes for individuals with reducible ventral hernia, simulating a cohort of 1 million individuals for each strategy. We derived cohort characteristics (mean age 58 years, 63% female), hospital costs, and perioperative mortality from the Nationwide Inpatient Sample (2003-2011), and additional probabilities, costs, and utilities from the literature. Outcomes included prevalence of any repair, emergent repair, and recurrence; lifetime costs; quality-adjusted life years (QALYs); and incremental cost-effectiveness ratios. We performed stochastic and probabilistic sensitivity analyses to identify parameter thresholds that affect optimal management, using a willingness-to-pay threshold of $50,000/QALY.

RESULTS

With watchful waiting, 39% ultimately required repair (14% emergent) and 24% recurred. Seventy per cent recurred with repair at diagnosis. Laparoscopic repair at diagnosis was cost-effective compared with open repair at diagnosis (incremental cost-effectiveness ratio $27,700/QALY). The choice of operative strategy (open vs laparoscopic) was sensitive to cost and postoperative quality of life. When perioperative mortality exceeded 5.2% or yearly recurrence exceeded 19.2%, watchful waiting became preferred.

CONCLUSIONS

Ventral hernia repair at diagnosis is very cost-effective. The choice between open and laparoscopic repair depends on surgical costs and postoperative quality of life. In patients with high risk of perioperative mortality or recurrence, watchful waiting is preferred.

Incisional Hernia Repair of Medium- and Large-Sized Defects: Laparoscopic IPOM Versus Open SUBLAY Technique

Background: Small incisional hernias can be repaired laparoscopically with low morbidity and reasonable recurrence rates. The aim of this study was to compare laparoscopic with open technique in medium- and large-sized defects regarding postoperative complications and recurrence rates. Methods: Between 2012 and 2016, 102 patients with medium- or large-sized defects according to EHS classification underwent incisional hernia repair. Patients' characteristics, hernia size and postoperative complications were prospectively recorded. In October 2016, eligible patients were assessed for recurrence. Results: About 31 patients underwent laparoscopic IPOM and 71 patients open SUBLAY repair. Morbidity rate was significantly lower in IPOM group than in SUBLAY group (19% versus 41%; p = .028). Postoperative complications according to Clavien-Dindo classification were significantly lower in the IPOM group (p = .021). Duration of surgery (88 versus 114 min; p = .009) and length of hospital stay (five versus eight days; p < .001) were significantly shorter for IPOM than for SUBLAY. 71 patients were available for follow-up. Recurrence rates showed no significant difference between study groups (13% versus 7%, p = .508). Conclusions: Laparoscopic repair in medium- and large-sized defects is a feasible and safe approach. IPOM compared to SUBLAY significantly reduces postoperative complications and hospital stay; recurrence rates are comparable.

Laparoscopic ventral hernia repair with intraperitoneal onlay mesh-results from a general surgical unit

BACKGROUND

Symptomatic ventral herniation is a common clinical presentation. The treatment, whether elective or as an emergency, can be difficult and a variety of surgical repairs are utilised. Intraperitoneal onlay mesh (IPOM) involves the placement of a reinforcing prosthesis, usually supported by primary closure of the defect. Intra-abdominal adhesions have been highlighted as a potential complication in utilising this form of mesh placement. Several methods of laparoscopic mesh placement outside of the peritoneal cavity are gaining prominence as potential alternatives to IPOM.

AIMS

This study reviews our experience with IPOM in the repair of ventral hernia by a single surgical team.

METHODS

A prospectively maintained electronic database of all laparoscopic ventral hernia repair (LVHR) performed within the study period was analysed and reported. Follow-up questionnaires were sent to patients to follow long-term outcomes.

RESULTS

One hundred eight patients underwent LVHR over a 7-year period. Demographics demonstrated an obese patient group (BMI 30.89 ± 4.9 kg/m²), with a variety of hernia sizes and morphologies. Hernia recurrence was found in two patients (1.8%). Twenty-nine (26.8%) patients suffered a complication, but only eight (7.4%) of those required intervention beyond pharmacotherapy. Two patients required mesh explantation.

CONCLUSIONS

IPOM for the general surgeon is a relatively safe and effective method of repairing ventral hernias, with a low recurrence rate.

Long-term results of laparoscopic versus open intraperitoneal onlay mesh incisional hernia repair: a propensity score-matched analysis

BACKGROUND

Intraperitoneal onlay mesh repair (IPOM) of incisional hernia is performed by laparoscopic and open access. The aim of the present study is to compare open versus laparoscopic surgery specifically using an IPOM technique for incisional hernia repair.

METHODS

A propensity score-matched observational single center study of patients that underwent IPOM between 2004 and 2015 was conducted. The primary outcome was hernia recurrence; secondary outcomes include length of stay, surgical site infections (SSI), complications, and localization of recurrence.

RESULTS

Among 553 patients with incisional hernia repair, 59% underwent laparoscopic and 41% open IPOM. A total of 184 patients completed follow-up. After a mean follow-up of 5.5 years recurrence rate was 20% in laparoscopic and 19% in open repair (p = 1.000). Patients undergoing laparoscopic IPOM had significantly reduced operation time (median 120 vs. 180 min, p < 0.001), shorter hospital stays (6 vs. 8 days, p = 0.002), less complications (10 vs. 23%, p = 0.046), and fewer SSI (1 vs. 21%, p < 0.001).

CONCLUSIONS

Laparoscopic IPOM is associated with reduced morbidity compared to open IPOM for incisional hernia repair.

Emergency laparoscopic and open repair of incarcerated ventral hernias: a multi-institutional comparative analysis with coarsened exact matching

BACKGROUND

The safety of emergent laparoscopic repair of incarcerated ventral hernias is not well established. The objective of this study was to determine if emergent laparoscopic repair of incarcerated ventral hernias is comparable to open repair with respect to short-term clinical outcomes.

METHODS

Patients undergoing emergency repair of an incarcerated ventral hernia with associated obstruction and/or gangrene were identified using the ACS-NSQIP 2012-2016 dataset. One-to-one coarsened exact matching (CEM) was conducted between patients undergoing laparoscopic and open repair. Matched cohorts were compared with respect to morbidity, mortality, readmission, reoperation, missed enterotomies, and length of stay. Missed enterotomy was defined as any re-operative procedure within 30 days that required resection of large or small bowel segments, based on CPT codes. Multivariate analysis was conducted to determine adjusted predictors of morbidity.

RESULTS

A total of 1642 patients were identified after CEM. Laparoscopic compared to open repair was associated with a lower rate of 30-day wound-morbidity (OR 0.35, 95% CI 0.22-0.57, p < 0.001). Laparoscopic repair was not associated with lower 30-day non-wound morbidity (OR 0.73, 95% CI 0.51-1.06, p = 0.094). Laparoscopic repair was associated with shorter LOS (3.6 days vs. 4.3 days, p = 0.014). A higher rate of missed enterotomies was observed in the laparoscopic cohort (0.7% vs. 0.0%, p = 0.031). There were no group differences with respect to 30-day readmission, reoperation, or mortality.

CONCLUSIONS

Emergency laparoscopic repair of incarcerated ventral hernias is associated with lower rates of wound-morbidity and shorter hospital stays compared to open repair. However, laparoscopic repair is associated with a higher rate of missed enterotomies; a rate which is low and comparable to elective non-incarcerated ventral hernia repairs.

What Is the Current Knowledge About Sublay/Retro-Rectus Repair of Incisional Hernias?

Introduction: There continues to be very little agreement among experts on the precise treatment strategy for incisional hernias. That is the conclusion drawn from the very limited scientific evidence available on the repair of incisional hernias. The present review now aims to critically assess the data available on the sublay/retro-rectus technique for repair of incisional hernia. Materials and Methods: A systematic search of the literature was performed in May 2018 using Medline, PubMed, and the Cochrane Library. This article is based on 77 publications. Results: The number of available RCTs that permit evaluation of the role of the sublay/retro-rectus technique in the repair of only incisional hernia is very small. The existing data suggest that the sublay/retro-rectus technique has disadvantages compared with the laparoscopic IPOM technique for repair of incisional hernia, but in that respect has advantages over all other open techniques. However, the few existing studies provide only a limited level of evidence for assessment purposes. Conclusion: Further RCTs based on a standardized technique are urgently needed for evaluation of the role of the sublay/retro-rectus incisional hernia repair technique.

Emergent Laparoscopic Ventral Hernia Repairs

BACKGROUND

Emergent repairs of incarcerated and strangulated ventral hernia repairs (VHR) are associated with higher perioperative morbidity and mortality than those repaired electively. Despite increasing utilization of minimally invasive techniques in elective repairs, the role for laparoscopy in emergent VHR is not well defined, and its feasibility has been demonstrated only in single center studies.

METHODS

The American College of Surgeons National Surgical Quality Improvement Program database (2009-2016) was queried for emergent VHR. Laparoscopic and open techniques were compared using univariate and multivariate analyses.

RESULTS

A total of 11,075 patients who underwent emergent ventral and incisional hernia repairs were identified: 85.5% open ventral hernia repair (OVHR), 14.5% laparoscopic ventral hernia repair (LVHR). Patients who underwent emergent OVHRs were older, more comorbid, and more likely to be septic at the time of surgery than those undergoing emergent LVHRs. Emergent OVHR patients were more likely to have minor complications (22.1% versus 11.0%; OR 1.7; 95% CI 1.069-2.834). After controlling for confounding variables, LVHR and OVHR had similar outcomes, with the exception of higher rates of superficial surgical site infection in OVHR (5.0% versus 1.8%; odd's ratio (OR) 2.7; 95% confidence interval (CI) 1.176-6.138). Following multivariate analysis, laparoscopic approach demonstrated similar outcomes in major complications, reoperation, and 30-d mortality compared to open repairs. However, when controlling for other confounding factors, LVHR had reduced length of stay compared to OVHR (6.7 versus 4.0 d; 1.6 d longer, standard error 0.77, P < 0.03).

CONCLUSIONS

Emergent LVHR is associated with fewer superficial surgical site infection and shorter length of stay than OVHR but no difference in major complications, reoperation or 30-d mortality is associated with LVHR in the emergency setting.

Nomenclature in Abdominal Wall Hernias: Is It Time for Consensus?

Abdominal wall reconstruction is a rapidly evolving area of surgical interest. Due to the increase in prevalence and size of ventral hernias and the high recurrence rates, the academic community has become motivated to find the best reconstruction techniques. Whilst interrogating the abdominal wall reconstruction literature, we discovered an inconsistency in hernia nomenclature that must be addressed. The terms used to describe the anatomical planes of mesh implantation ‘inlay’, ‘sublay’ and ‘underlay’ are misinterpreted throughout. We describe the misinterpretation of these terms and give evidence of where it exists in the literature. We give three critical arguments of why these misinterpretations hinder advances in abdominal wall reconstruction research. The correct definitions of the anatomical planes, and their respective terms, are described and illustrated. Clearly defined nomenclature is required as academic surgeons strive to improve abdominal wall reconstruction outcomes and lower complication rates.

The Treatment of Incisional Hernia

BACKGROUND

A meta-analysis of studies from multiple countries has shown that the incidence of incisional hernia varies from 4% to 10% depending on the type of operation. No epidemiological surveys have been conducted so far. The worst possible complication of an incisional hernia if it is not treated surgically is incarceration. In this article, we present the main surgical methods of treating this condition. We also evaluate the available randomized and controlled trials (RCTs) in which open and laparoscopic techniques were compared and analyze the patients' quality of life.

METHODS

We selectively searched PubMed for relevant literature using the search terms "incisional hernia" and "randomized controlled trial." 9 RCTs were included in the analysis. The endpoints of the meta-analysis were the number of reoperations, complications, and recurrences. The observed events were studied statistically by correlation of two unpaired groups with a fixed-effects model and with a random-effects model. We analyzed the quality of life in our.

RESULTS

Open surgery and laparoscopic surgery for the repair of incisional hernias have similar rates of reoperation (odds ratio [OR] 0.419 favoring laparoscopy, 95% confidence interval [0.159; 1.100]; p = 0.077). The rates of surgical complications are also similar (OR 0.706; 95% CI [0.278; 1.783]; p = 0.461), although the data are highly heterogeneous, and the recurrence rates are comparable as well (OR 1.301; 95% CI [0,761; 2,225]; p = 0.336). In our own patient cohort in Würzburg, the quality of life was better in multiple categories one year after surgery.

CONCLUSION

The operative treatment of incisional hernia markedly improves patients' quality of life. The currently available evidence regarding the complication rates of open and laparoscopic surgical repair is highly heterogeneous, and further RCTs on this subject would therefore be desirable. Moreover, new study models are needed so that well-founded individualized treatment algorithms can be developed.

A systematic methodological review of reported perioperative variables, postoperative outcomes and hernia recurrence from randomised controlled trials of elective ventral hernia repair: clear definitions and standardised datasets are needed

BACKGROUND

This systematic review assesses the perioperative variables and post-operative outcomes reported by randomised controlled trials (RCTs) of VH repair. This review focuses particularly on definitions of hernia recurrence and techniques used for detection.

OBJECTIVE

Our aim is to identify and quantify the inconsistencies in perioperative variable and postoperative outcome reporting, so as to justify future development of clear definitions of hernia recurrence and a standardised dataset of such variables.

METHODS

The PubMed database was searched for elective VH repair RCTs reported January 1995 to March 2016 inclusive. Three independent reviewers performed article screening, and two reviewers independently extracted data. Hernia recurrence, recurrence rate, timing and definitions of recurrence, and techniques used to detect recurrence were extracted. We also assessed reported post-operative complications, standardised operative outcomes, patient reported outcomes, pre-operative CT scan hernia dimensions, intra-operative variables, patient co-morbidity, and hernia morphology.

RESULTS

31 RCTs (3367 patients) were identified. Only 6 (19.3%) defined hernia recurrence and methods to detect recurrence were inconsistent. Sixty-four different clinical outcomes were reported across the RCTs, with wound infection (30 trials, 96.7%), hernia recurrence (30, 96.7%), seroma (29, 93.5%), length of hospital stay (22, 71%) and haematoma (21, 67.7%) reported most frequently. Fourteen (45%), 11 (35%) and 0 trials reported CT measurements of hernia defect area, width and loss of domain, respectively. No trial graded hernias using generally accepted scales.

CONCLUSION

VH RCTs report peri- and post-operative variables inconsistently, and with poor definitions. A standardised minimum dataset, including definitions of recurrence, is required.

A nationwide evaluation of robotic ventral hernia surgery

BACKGROUND

The purpose of this study was to examine outcomes of robotic ventral hernia repair(RVHR) versus laparoscopic ventral hernia repair(LVHR).

METHODS

The Nationwide Inpatient Sample was queried from October 2008 to December 2013 for ventral hernia repairs. Demographics, morbidity, mortality, and charges were compared between RVHR and LVHR.

RESULTS

From 2008-2013, 149,622 ventral hernia surgeries were identified; 117,028 open, 32,243 laparoscopic, and 351 robotic. Open repairs were excluded. RVHR rose annually with 2013 containing 47.9% of all RVHRs. RVHR patients were more likely to be older and have more chronic conditions. There was no difference between length of stay. Pneumonia rates were higher with RVHR; however, after controlling for confounding variables, there was no difference in pneumonia rates. Mortality and other major complications were similar. Total charges were increased for RVHR in univariate and multivariate analysis. RVHR was more common in teaching hospitals and wealthier zip codes.

CONCLUSION

RVHR demonstrates comparable safety to the laparoscopic technique, with increased charges and increased volume in urban teaching hospitals and patients from areas of higher median income.

Laparoscopic versus open incisional hernia repair: a retrospective cohort study with costs analysis on 269 patients

PURPOSE

To compare clinical outcomes and institutional costs of elective laparoscopic and open incisional hernia mesh repairs and to identify independent predictors of prolonged operative time and hospital length of stay (LOS).

METHODS

Retrospective observational cohort study on 269 consecutive patients who underwent elective incisional hernia mesh repair, laparoscopic group (N = 94) and open group (N = 175), between May 2004 and July 2014.

RESULTS

Operative time was shorter in the laparoscopic versus open group (p < 0.0001). Perioperative morbidity and mortality were similar in the two groups. Patients in the laparoscopic group were discharged a median of 2 days earlier (p < 0.0001). At a median follow-up over 50 months, no difference in hernia recurrence was detected between the groups. In laparoscopic group total institutional costs were lower (p = 0.02). At Cox regression analysis adjusted for potential confounders, large wall defect (W3) and higher operative risk (ASA score 3-4) were associated with prolonged operative time, while midline hernia site was associated with increased hospital LOS. Open surgical approach was associated with prolongation of both operative time and LOS.

CONCLUSIONS

Laparoscopic approach may be considered safely to all patients for incisional hernia repair, regardless of patients' characteristics (age, gender, BMI, ASA score, comorbidities) and size of the wall defect (W2-3), with the advantage of shorter operating time and hospital LOS that yields reduced total institutional costs. Patients with higher ASA score and large hernia defects are at risk of prolonged operative time, while an open approach is associated with longer duration of surgical operation and hospital LOS.

Quality of Life and Surgical Outcome 1 Year After Open and Laparoscopic Incisional Hernia Repair: PROLOVE: A Randomized Controlled Trial

OBJECTIVE

Patients suffering from an incisional hernia after abdominal surgery have an impaired quality of life (QoL). Surgery aims to improve QoL with a minimum risk of further complications. The aim was to analyze QoL, predictors for outcome, including recurrence and reoperation rates during the first postoperative year.

METHODS

In a randomized controlled trial comparing laparoscopic and open mesh repair, 133 patients were assessed preoperatively and after 1 year with regard to QoL using the Short Form-36 (SF-36), visual analog scale (pain, movement limitation, and fatigue), and questions addressing abdominal wall complaints. Factors concerning recurrence, reoperations, satisfaction, and improved QoL were analyzed.

RESULTS

A total of 124 patients remained for analysis. All SF-36 scores except mental composite score increased, reaching and maintaining levels of the Swedish norm already after 8 weeks with no difference between groups. Event-free recovery was seen in 85% in the laparoscopic group and in 65% of the open cases (P < 0.010). Five recurrences occurred after laparoscopic surgery and 1 in the open group (P < 0.112). Overall, abdominal wall complaints decreased from 82% to 13% of the patients; and 92% were satisfied with the result after 1 year.In univariable logistic regression analyses laparoscopic surgery and male sex predicted an event-free recovery. Obesity (BMI > 30) predicted better outcome with regard to QoL. No predictors for recurrence or satisfaction were identified.

CONCLUSIONS

Patients with incisional hernia benefit substantially from surgery concerning QoL, independent of surgical technique. An event-free recovery occurred frequently after laparoscopic surgery. SF-36 seems well suited for assessing surgical outcome in patients after incisional hernia repair.

Assessing the safety of outpatient ventral hernia repair: a NSQIP analysis of 7666 patients

PURPOSE

Given the paucity of literature on outpatient ventral hernia repair (VHR), and that assessment of the safety of outpatient surgical procedures is becoming an active area of investigation, we have performed a multi-institutional retrospective analysis benchmarking rates of 30-day complications and readmissions and identifying predictive factors for these outcomes.

METHODS

National surgical quality improvement project data files from 2011 to 2012 were reviewed to collect data on all patients undergoing outpatient VHR during that period. The incidence of 30-day peri-operative complication and unplanned readmission was surveyed. We created a multivariate regression model to identify predictive factors for overall, surgical, and medical complications and unplanned readmissions with proper risk adjustment.

RESULTS

30-day complication and readmission rates in outpatient VHR were acceptably low. 3% of the queried outpatients experienced an overall complication, 2.1% a surgical complication, and 1.1% a medical complication. 3.3% of all patients were readmitted within 30 days. Upon multivariate analysis, predictors of overall complications included age, BMI, history of Chronic Obstructive Pulmonary Disease (COPD), and total operation time, predictors of surgical complications included age, BMI, total operation time, predictors of medical complications included total operation time, and predictors of unplanned readmissions included history of COPD, bleeding disorder, American Society of Anesthesiologists Class 3, 4, or 5, total operation time, and use of the laparoscopic technique.

CONCLUSION

We have demonstrated that the risk of peri-operative morbidity in VHR as granularly defined in our study is low in the outpatient setting. Identification of predictive factors will be important to patient risk stratification.

Insulin dependence as an independent predictor of perioperative morbidity after ventral hernia repair: a National Surgical Quality Improvement Program analysis of 45,759 patients

BACKGROUND

Although diabetes mellitus has been identified as a predictor of perioperative morbidity after ventral hernia repair (VHR), it is unclear whether insulin-dependent diabetes mellitus (IDDM) and non-insulin-dependent diabetes mellitus (NIDDM) confer the same degree of risk. We examined the variable effect of IDDM and NIDDM on 30-day medical and surgical complications after VHR.

METHODS

We performed a retrospective analysis of patients in the National Surgical Quality Improvement Program database from 2005 to 2012 undergoing VHR. After perioperative variable comparison, regression analysis was performed to determine whether IDDM and/or NIDDM independently predicted increased complications after proper risk adjustment.

RESULTS

A total of 45,759 patients were identified to have undergone VHR. Of these, 38,026 patients (83.1%) were not diabetic, 5,252 (11.5%) were NIDDM patients, and 2,481 (5.4%) were IDDM patients. After controlling for other risk factors, we found that IDDM independently predicted increased rates of overall, surgical, and medical complications (odds ratio, 1.284, 1.251, 1.263, respectively) in open repair. IDDM independently predicted increased overall and medical complications (odds ratio, 1.997, 1.889, respectively) but not surgical complications in laparoscopic repair. NIDDM was not significantly associated with any complication type in either procedure type.

CONCLUSIONS

Our present study suggests that much of the perioperative risk associated with diabetes is attributable to IDDM. The effect of IDDM on laparoscopic and open repair is subtly different. IDDM demonstrates increased overall and medical complications in laparoscopic repair and increased overall, medical, and surgical complications in open repair. Of note, IDDM does not independently predict increased risk for surgical complications in laparoscopic repair.

Defining surgical outcomes and quality of life in massive ventral hernia repair: an international multicenter prospective study

BACKGROUND

Our goal was to set criteria for massive ventral hernia and to compare surgical outcomes and quality of life after ventral hernia repair (VHR).

METHODS

The International Hernia Mesh Registry was queried for patients undergoing VHR from 2007 to 2013. Defect was categorized as massive if the width or length was greater than 15 cm or area greater than 150 cm(2). Massive VHR was compared to regular VHR.

RESULTS

A total of 878 patients underwent VHR: 436 open, 442 laparoscopic with 13 deaths (1.5%) and 45 hernia recurrences (5.1%). Of those, 158 patients (18%) met criteria for massive VHR. Massive VHR patients had longer length of stay (LOS) and operative time and more hematomas, wound infections, wound complications, and pneumonias (P < .05). On multivariate analysis, LOS was longer, and early postoperative pain and activity limitation were greater in massive VHRs (P < .01). Massive VHR in the laparoscopic approach resulted in greater long-term mesh sensation (P < .01).

CONCLUSIONS

VHR in massive hernias have increased rates of complications and longer LOS.

Laparoscopic versus open incisional and ventral hernia repair: a systematic review and meta-analysis

BACKGROUND

Laparoscopic incisional and ventral hernia repair (LIVHR) is an alternative approach to conventional open incisional and ventral hernia repair (OIVHR). A consensus on outcomes of LIVHR when compared with OIVHR has not been reached.

METHODS

As the basis for the present study, we performed a systematic review and meta-analysis of all randomized controlled trials comparing LIVHR and OIVHR.

RESULTS

Eleven studies involving 1,003 patients were enrolled. The incidences of wound infection were significantly lower in the laparoscopic group than that in the open group (laparoscopic group 2.8 %, open group 16.2 %; RR = 0.19, 95 % CI 0.11-0.32; P < 0.00001). The rates of wound drainage were significantly lower in the laparoscopic group than that in the open group (laparoscopic group 2.6 %, open group 67.0 %; RR = 0.06, 95 % CI 0.03-0.09; P < 0.00001). However, the rates of bowel injury were significantly higher in the laparoscopic group than in the open group (laparoscopic group 4.3 %, open group 0.81 %; RR = 3.68, 95 % CI 1.56-8.67; P = 0.003). There were no significant differences between the two groups in the incidences of hernia recurrence, postoperative seroma, hematoma, bowel obstruction, bleeding, and reoperation. Descriptive analyses showed a shorter length of hospital stay in the laparoscopic group.

CONCLUSIONS

Laparoscopic incisional and ventral hernia repair is a feasible and effective alternative to the open technique. It is associated with lower incidences of wound infection and shorter length of hospital stay. However, caution is required because it is associated with an increased risk of bowel injury compared with the open technique. Given the relatively short follow-up duration of trials included in the systematic review, trials with long-term follow-up are needed to compare the durability of laparoscopic and open repair.

Short-term results of open inguinal hernia repair with self-gripping Parietex ProGrip mesh in China: A retrospective study of 90 cases

OBJECTIVES

This study investigated short-term outcomes of Lichtenstein hernia repair using self-gripping Parietex ProGrip mesh in Chinese patients with inguinal hernias.

METHODS

Retrospective analysis of patients undergoing Lichtenstein hernia repair using the Parietex ProGrip mesh at a single hospital in China between July 2012 and June 2013. All patients completed the EuroQol-five dimensions (EuroQoL-5D) and short form-36 questionnaires and were followed up at 1 day, 7 days, 1 month. and 6 months, postoperatively.

RESULTS

Ninety cases (66 males, 24 females) were studied. Mean ± standard deviation (SD) patient age was 48.7 ± 16.8 (range, 21-87) years. Most hernias were Gilbert's type II (23%) or III (31%). During 6 months of follow-up, none of the patients had recurrent hernia or systemic postoperative complications. The mean ± SD pain visual analog scale score decreased from 32 ± 10.6 at postoperative Day 1 to 0.67 ± 2.5 at 6 months. From postoperative Day 1 to 6 months, there were marked improvements in health and health-related quality of life; mean ± SD visual analog scale EuroQoL score increased from 55.3 ± 8 to 95.2 ± 3 and mean ± SD HR EuroQoL score from 0.31 ± 0.07 to 0.95 ± 0.02. At 6 months, mean scores in all eight dimensions of the short form-36 questionnaires had increased from baseline.

CONCLUSION

The use of self-fixating Parietex ProGrip mesh in open inguinal hernia repair is simple, rapid, effective, and safe, and is associated with low postoperative pain and improved quality life among patients.

Laparoscopic versus open ventral hernia repair: longitudinal outcomes and cost analysis using statewide claims data

BACKGROUND

There is still considerable debate regarding the best operative approach to ventral hernia repair. Using two large statewide databases, this study sought to evaluate the longitudinal outcomes and associated costs of laparoscopic and open ventral hernia repair.

METHODS

All patients undergoing elective ventral hernia repair from 2007-2011 were identified from inpatient discharge data from California and New York. In-hospital morbidity, in-hospital mortality, incidence of readmission, and incidence of revisional ventral hernia repair were evaluated as a function of surgical technique. The associated costs of medical care for laparoscopic versus open ventral hernia repair were evaluate for both the index procedure and all subsequent admissions and procedures within the study period.

RESULTS

A total of 13,567 patients underwent elective ventral hernia repair with mesh; 9228 (69%) underwent OVHR and 4339 (31%) underwent LVHR. At time of the index procedure, LVHR was associated with a lower incidence of reoperation (OR 0.29, CI 0.12-0.58, p = 0.001), wound disruption (OR 0.35, CI 0.16-0.78, p = 0.01), wound infection (OR 0.50, CI 0.25-0.70, p < 0.001), blood transfusion (OR 0.47, CI 0.36-0.61, p < 0.001), ARDS (OR 0.74, CI 0.54-0.99, p < 0.05), and total index visit complications (OR 0.72, CI 0.64-0.80, p < 0.001). LVHR was associated with significantly fewer readmissions (OR 0.81, CI 0.75-0.88, p < 0.001) and a lower risk for revisional VHR (OR 0.75, CI 0.64-0.88, p < 0.001). LVHR was associated with lower total costs at 1 year ($3451, CI 1892-5011, p < 0.001).

CONCLUSIONS

Open ventral hernia repair was associated with a higher incidence of perioperative complications, postoperative readmissions and need for revisional hernia repair when compared to laparoscopic ventral hernia repair, even when controlling for patient sociodemographics. In congruence, open ventral hernia repair was associated with higher costs for both the index hernia repair and tallied over the length of follow-up for readmissions and revisional hernia repair.

Female gender and diabetes mellitus increase the risk of recurrence after laparoscopic incisional hernia repair

BACKGROUND

Laparoscopic hernia repair is used widely for the repair of incisional hernias. Few case studies have focussed on purely 'incisional' hernias. This multicentre series represents a collaborative effort and employed statistical analyses to provide insight into the factors predisposing to recurrence of incisional hernia after laparoscopic repair. A specific hypothesis (ie, laterality of hernias as well as proximity to the xyphoid process and pubic symphysis predisposes to recurrence) was also tested.

METHODS

This was a retrospective study of all laparoscopic incisional hernias undertaken in six centres from 1 January 2004 to 31 December 2010. It comprised a comprehensive review of case notes and a follow-up using a structured telephone questionnaire. Patient demographics, previous medical/surgical history, surgical procedure, postoperative recovery, and perceived effect on quality of life were recorded. Repairs undertaken for primary ventral hernias were excluded. A logistic regression analysis was then fitted with recurrence as the primary outcome.

RESULTS

A total of 186 cases (91 females) were identified. Median follow-up was 42 months. Telephone interviews were answered by 115/186 (62%) of subjects. Logistic regression analyses suggested that only female sex (odds ratio (OR) 3.53; 95% confidence interval (CI) 1.39-8.97) and diabetes mellitus (3.54; 1-12.56) significantly increased the risk of recurrence. Position of the defect had no statistical effect.

CONCLUSIONS

These data suggest an increased risk of recurrence after laparoscopic incisional hernia repair in females and subjects with diabetes mellitus. These data will help inform surgeons and patients when considering laparoscopic management of incisional hernias. We recommend a centrally hosted, prospectively maintained national/international database to carry out additional research.

Laparoscopic incisional and ventral hernia repair in a district general hospital

INTRODUCTION

The laparoscopic approach to repairing ventral and incisional hernias has gained increasing popularity worldwide. We reviewed the experience of laparoscopic ventral hernia repair at a district general hospital in the UK with particular reference to patients with massive defects (diameter ≥15cm) and the morbidly obese.

METHODS

A total of 144 patients underwent laparoscopic ventral (incisional or umbilical/paraumbilical) hernia repair between April 2007 and September 2012.

RESULTS

The prevalence of conversion to open surgery was 2.8%. The prevalence of postoperative complications was 3.5%. Median postoperative follow-up was 30.2 months. A total of 5.6% cases suffered late complications and 2.8% developed recurrence. Thirty-four patients underwent repair of defects ≥10cm in diameter with a prevalence of recurrence of 5.6%. Sixteen patients underwent repair of 'massive' incisional hernia (diameter ≥15cm) with a prevalence of recurrence of 12.5%. Sixteen patients with a body mass index (BMI) ≥40kg/m(2) (range, 40-61kg/m(2)) underwent laparoscopic repair with a prevalence of recurrence of 6.3% (p>0.05 vs BMI <40kg/m(2)).

CONCLUSIONS

Laparoscopic ventral hernia repair can be carried out safely with a low prevalence of recurrence. It may have advantages in morbidly obese patients in whom open repair would represent a significant undertaking. Laparoscopic ventral hernia repair may be used in cases of large and massive hernias, in which the risk of recurrence increases but is comparable with open repair and associated with low morbidity.

Meta-analysis and systematic review of laparoscopic versus open mesh repair for elective incisional hernia

CONTEXT

The utility of laparoscopic repair in the treatment of incisional hernia repair is still contentious.

OBJECTIVES

The aim was to conduct a meta-analysis of RCTs investigating the surgical and postsurgical outcomes of elective incisional hernia by open versus laparoscopic method.

DATA SOURCES

A search of PubMed, Medline, Embase, Science Citation Index, Current Contents, and the Cochrane Central Register of Controlled Trials published between January 1993 and September 2013 was performed using medical subject headings (MESH) "hernia," "incisional," "abdominal," "randomized/randomised controlled trial," "abdominal wall hernia," "laparoscopic repair," "open repair", "human" and "English".

STUDY ELIGIBILITY CRITERIA, PARTICIPANTS AND INTERVENTIONS

Prospective RCTs comparing surgical treatment of only incisional hernia (and not primary ventral hernias) using open and laparoscopic methods were selected.

STUDY APPRAISAL AND SYNTHESIS METHODS

Data extraction and critical appraisal were carried out independently by two authors (AA and MAM) using predefined data fields. The outcome variables analyzed included (a) hernia diameter; (b) operative time; (c) length of hospital stay; (d) overall complication rate; (e) bowel complications; (f) reoperation; (g) wound infection; (h) wound hematoma or seroma; (i) time to oral intake; (j) back to work; (k) recurrence rate; and (l) postoperative neuralgia. These outcomes were unanimously decided to be important since they influence the practical and surgical approach towards hernia management within hospitals and institutions. The quality of RCTs was assessed using Jadad's scoring system. Random effects model was used to calculate the effect size of both binary and continuous data. Heterogeneity amongst the outcome variables of these trials was determined by the Cochran Q statistic and I (2) index. The meta-analysis was prepared in accordance with PRISMA guidelines.

RESULTS

Sufficient data were available for the analysis of twelve clinically relevant outcomes. Statistically significant reduction in bowel complications was noted with open surgery compared to the laparoscopic repair in five studies (OR 2.56, 95 % CI 1.15, 5.72, p = 0.02). Comparable effects were noted for other variables which include hernia diameter (SMD -0.27, 95 % CI -0.77, 0.23, p = 0.29), operative time (SMD -0.08, 95 % CI -4.46, 4.30, p = 0.97), overall complications (OR -1.07, 95 % CI -0.33, 3.42, p = 0.91), wound infection (OR 0.49, 95 % CI 0.09, 2.67, p = 0.41), wound hematoma or seroma (OR 1.54, 95 % CI 0.58, 4.09, p = 0.38), reoperation rate (OR -0.32, 95 % CI 0.07, 1.43, p = 0.14), time to oral intake (SMD -0.16, 95 % CI -1.97, 2.28, p = 0.89), length of hospital stay (SMD -0.83, 95 % CI -2.22, 0.56, p = 0.24), back to work (SMD -3.14, 95 % CI -8.92, 2.64, p = 0.29), recurrence rate (OR 1.41, 95 % CI 0.81, 2.46, p = 0.23), and postoperative neuralgia (OR 0.48, 95 % CI 0.16, 1.46, p = 0.20).

CONCLUSIONS

On the basis of our meta-analysis, we conclude that laparoscopic and open repair of incisional hernia is comparable. A larger randomized controlled multicenter trial with strict inclusion and exclusion criteria and standardized techniques for both repairs is required to demonstrate the superiority of one technique over the other.

Concomitant laparoscopic intraperitoneal onlay mesh repair with other clean contaminated procedures-study of feasibility and safety

BACKGROUND

Laparoscopic ventral hernia mesh repair has gained wide popularity with the benefits of shorter hospital stay, improved patient outcome, and fewer complications compared with traditional open procedures. It also offers the advantage of combining procedures at different quadrants of the abdomen. In this article we have retrospectively studied the safety of combining laparoscopic intraperitoneal onlay mesh (IPOM) repair with clean contaminated surgeries like cholecystectomy and hysterectomy.

MATERIALS AND METHODS

The data of all patients who received concomitant laparoscopic ventral hernia repairs along with cholecystectomy and hysterectomy were collected retrospectively. The details of these surgeries and the immediate postoperative outcome parameters were analyzed.

RESULTS

Between January 2006 and January 2011, 246 cases of laparoscopic IPOM in combination with clean contaminated surgeries were performed. Of these, 126 were hysterectomies, and 120 were cholecystectomies. Mean operating time for laparoscopic IPOM with cholecystectomy was 136 minutes (range, 112-172 minutes), and that for laparoscopic IPOM with hysterectomy was 224 minutes (range, 196-285 minutes). The average hospital stays were 4.3 days (range, 3-7 days) for laparoscopic IPOM with hysterectomy and 2.73 days (range, 1-5 days) for laparoscopic IPOM with cholecystectomy. Thirty-six patients (14.6%) developed seroma, for which 16 patients (6.5%) warranted aspiration. We had 0.8% mesh infection in total. The recurrence rates were 0.83% (n=1) in the cholecystectomy group and 0.8% (n=1) in the hysterectomy group.

CONCLUSIONS

Laparoscopic IPOM can be performed simultaneously with selected clean contaminated surgeries with acceptable morbidity. Combining clean contaminated surgeries does not significantly alter the outcome of the procedure.

Evaluation of absorbable mesh fixation devices at various deployment angles

BACKGROUND

Hernia repair failure may occur due to suboptimal mesh fixation by mechanical constructs before mesh integration. Construct design and acute penetration angle may alter mesh-tissue fixation strength. We compared acute fixation strengths of absorbable fixation devices at various deployment angles, directions of loading, and construct orientations.

METHODS

Porcine abdominal walls were sectioned. Constructs were deployed at 30°, 45°, 60°, and 90° angles to fix mesh to the tissue specimens. Lap-shear testing was performed in upward, downward, and lateral directions in relation to the abdominal wall cranial-caudal axis to evaluate fixation. Absorbatack™ (AT), SorbaFix™ (SF), and SecureStrap™ in vertical (SSV) and horizontal (SSH) orientations in relation to the abdominal wall cranial-caudal axis were tested. Ten tests were performed for each combination of device, angle, and loading direction. Failure types and strength data were recorded. ANOVA with Tukey-Kramer adjustments for multiple comparisons and χ (2) tests were performed as appropriate (p < 0.05 considered significant).

RESULTS

At 30°, SSH and SSV had greater fixation strengths (12.95, 12.98 N, respectively) than SF (5.70 N; p = 0.0057, p = 0.0053, respectively). At 45°, mean fixation strength of SSH was significantly greater than SF (18.14, 11.40 N; p = 0.0002). No differences in strength were identified at 60° or 90°. No differences in strength were noted between SSV and SSH with different directions of loading. No differences were noted between SS and AT at any angle. Immediate failure was associated with SF (p < 0.0001) and the 30° tacking angle (p < 0.01).

CONCLUSIONS

Mesh-tissue fixation was stronger at acute deployment angles with SS compared to SF constructs. The 30° angle and the SF device were associated with increased immediate failures. Varying construct and loading direction did not generate statistically significant differences in the fixation strength of absorbable fixation devices in this study.

Laparoscopic repair reduces incidence of surgical site infections for all ventral hernias

BACKGROUND

The role of laparoscopic repair of ventral hernias remains incompletely defined. We hypothesize that laparoscopy, compared to open repair with mesh, decreases surgical site infection (SSI) for all ventral hernia types.

METHODS

MEDLINE, EMBASE, and Cochrane databases were reviewed to identify studies evaluating outcomes of laparoscopic versus open repair with mesh of ventral hernias and divided into groups (primary or incisional). Studies with high risk of bias were excluded. Primary outcomes of interest were recurrence and SSI. Fixed effects model was used unless significant heterogeneity, assessed with the Higgins I square (I(2)), was encountered.

RESULTS

There were 5 and 15 studies for primary and incisional cohorts. No difference was seen in recurrence between laparoscopic and open repair in the two hernia groups. SSI was more common with open repair in both hernia groups: primary (OR 4.17, 95%CI [2.03-8.55]) and incisional (OR 5.16, 95%CI [2.79-9.57]).

CONCLUSIONS

Laparoscopic repair, compared to open repair with mesh, decreases rates of SSI in all types of ventral hernias with no difference in recurrence. These data suggest that laparoscopic approach may be the treatment of choice for all types of ventral hernias.

Patient-centered outcomes following laparoscopic ventral hernia repair: a systematic review of the current literature

BACKGROUND

The purpose of this study was to systematically review patients who underwent laparoscopic ventral hernia repair (LVHR) and assess quality of life, pain, functionality, and patient satisfaction.

DATA SOURCES

MEDLINE, PubMed, and Cochrane database search identified 880 relevant articles. After the limits were applied, 14 articles were accepted for review. The analysis included health-related quality of life (HRQoL) measures including quality of life, pain, function, satisfaction, and mental and emotional well-being.

CONCLUSIONS

Fourteen studies were reviewed. Mean study size was 92.6 subjects (24 to 306) and mean defect size was 71.7 cm(2). LVHR improved the overall HRQoL in 6 of the 8 studies. Thirteen studies assessing pain demonstrated improved pain scores relative to preoperative levels and long-term follow up. LVHR was not associated with long-term pain. Functionality improved in 12 studies. Return to work ranged from 6 to 18 days postoperatively in 50% of studies and physical function scores improved in the remaining 50% of the studies. Patient satisfaction improved after LVHR in all studies assessing patient satisfaction. Fixation methods did not influence HRQoL. Laparoscopic repair was associated with improving mental and emotional well-being in 6 of the 7 studies.

Standardized measurement of quality of life after incisional hernia repair: a systematic review

BACKGROUND

Recent improvements in incisional hernia repair have led to lower rates of recurrence. As a consequence, increasing attention has been paid to patient-reported outcomes after surgery. However, there is no consensus on how to measure patients' quality of life after incisional hernia repair. The aim of this systematic review was to analyze existing standardized methods to measure quality of life after incisional hernia repair.

DATA SOURCES

A PubMed and Embase search was carried out together with a cross-reference search of eligible papers, giving a total of 26 included studies.

CONCLUSIONS

Different standardized methods for measurement of quality of life after incisional hernia repair are available, but no consensus on the optimal method, timing, or length of follow-up exist. International guidelines could help standardization, enabling better comparison between studies.