Mesh fixation compared to nonfixation in total extraperitoneal inguinal hernia repair: a randomized controlled trial in a rural center in India

Comparison of anatomical polyester mesh without fixation and conventional flat mesh with fixation in laparoscopic total extraperitoneal repair for inguinal hernia

PURPOSE

Laparoscopic total extraperitoneal (TEP) inguinal hernia repair is a well-established technique. In Taiwan, the National Health Insurance (NHI) covers the fees of the procedure and conventional mesh (polypropylene mesh), whereas the anatomical polyester mesh (Parietex™) requires additional self-pay. This study aimed to compare the outcomes of the conventional mesh with fixation versus the polyester mesh (without fixation) in laparoscopic TEP repair.

METHODS

We retrospectively reviewed the medical records of male patients who underwent laparoscopic TEP repair between 2017 and 2021. Patients could choose between the conventional mesh with fixation (conventional mesh group) or self-paid Parietex™ mesh without fixation (anatomical polyester mesh group). The outcomes included operation (OP) time, prolonged length of stay (LOS), and postoperative complications.

RESULTS

A total of 74 patients with 123 hernias were included, of which 36 patients (67 hernias) underwent the anatomical mesh without fixation, while 38 patients (56 hernias) underwent the conventional mesh with fixation. The mean OP time was 102.6 ± 45.6 and 88.5 ± 42.0 min in the conventional and the anatomical polyester mesh group. After adjusting for body mass index, diabetes mellitus, cardiovascular disease, and hernia type, no significant differences were observed between the two groups in OP time (p = 0.152) and the risk of acute pain (p = 0.337), chronic pain (p = 0.816), seroma (p = 0.941), hydrocele (p = 0.423), or hematoma (p = 0.347).

CONCLUSIONS

The conventional mesh demonstrates non-inferior outcomes compared to the anatomical polyester mesh. Given that the anatomical polyester mesh is not reimbursed by Taiwan's National Health Insurance (NHI), the use of the conventional mesh with fixation in TEP inguinal hernia repair may be a more cost-effective option in Taiwan.

Mesh fixation in laparoscopic groin hernia repair: a comprehensive review of techniques and devices

PURPOSE

Laparoscopic groin hernia repair has increased in popularity in recent years. Many laparoscopic mesh fixation techniques and devices are available, but there is a lack of high-certainty evidence favoring one fixation technique over another. This narrative review aimed to provide a comprehensive summary detailing the available mesh fixation techniques and devices used in laparoscopic groin hernia repair.

METHODS

Information about mesh fixation techniques and devices was searched in PubMed, groin hernia guidelines, and medical technology companies webpages.

RESULTS

This review outlines various mesh fixation techniques, materials, and their features in laparoscopic groin hernia repair. We have summarized and presented in detail the available information on both penetrating and non-penetrating mesh fixation techniques, including the option of not fixating the mesh. Penetrating mesh fixation includes tacks, staples, and sutures. Tacks vary in size, absorption time, and shape and can be further categorized into absorbable and permanent materials. Additionally, this review describes two types of permanent titanium staples and the use of permanent and absorbable sutures as mesh fixation. Non-penetrating mesh fixation includes self-fixating mesh and glue. The types of glue are cyanoacrylate glue and fibrin sealant. While fibrin sealant requires careful thawing from a frozen state before use, cyanoacrylate glue offers easier storage but poses a risk of exothermic reaction with the surrounding tissue. Self-fixating meshes have an adhesive side made of microgrips or adhesive material, and a permanent side.

CONCLUSION

This review provided a comprehensive overview of the various mesh fixation techniques and devices in laparoscopic groin hernia repair.

A Long-Term Study on Recurrence, Chronic Pain, and Quality of Life in Obese Patients with Groin Hernia undergoing Laparoscopic Total Extraperitoneal Hernia Repair: Comparison between Mesh Fixation and Nonfixation Techniques

Introduction

"Laparoscopic Total Extraperitoneal (TEP)" repair of hernia is a common surgical procedure for treating groin hernias. This study focused on the long-standing assessment of "quality of life (QoL)," chronic pain, and recurrence to compare the effectiveness of TEP hernia surgery with "mesh fixation (MF)" against "nonfixation (NF)" in patients who are obese with a BMI of 35 kgs/m2 or higher.

Methods

In this study's randomized controlled experiment, 73 obese individuals with groin hernias underwent total extraperitoneal hernia repair with either MF (n = 35) or NF (n = 38). A check-up was conducted 1, 3, and 5 years after the operation. Recurrence, chronic pain, and QoL were assessed using a physical examination and validated questionnaires.

Results

There were no changes between the subjects of either group in baseline characteristics, hernia recurrence rate, chronic pain rate, or QoL. There were neither significant variations in surgical complications nor hospital stay duration.

Conclusion

The results suggest that treating TEP hernias among people with a BMI of 35 kgs/m2 or above with mesh NF may be successful. The recurrence rates among the subject groups were not substantially different; however, NF was linked with reduced rates of chronic pain which would be beneficial for patient satisfaction and recovery. To decide the optimal technique for MF in TEP hernia repair, these findings need to be verified by additional studies.

Mesh Fixation Versus Nonfixation in Laparoscopic Inguinal Hernia Repair: A Systematic Review and Meta-Analysis

BACKGROUND

It remains controversial whether mesh should be fixed during laparoscopic inguinal hernia repair. A systematic review and meta-analysis of randomized-controlled trials (RCTs) was conducted to compare fixation and nonfixation in laparoscopic groin hernia repair.

METHODS

A registration was listed with PROSPERO (International Prospective Register of Systematic Reviews; registration no. CRD42022350469). Databases including PubMed, Embase, Cochrane Library, and ClinicalTrials.gov were searched to identify RCTs comparing fixation with nonfixation in laparoscopic groin hernia repair. The primary outcomes were postoperative pain at 24 hours and recurrence. Secondary outcomes were mean operative time, urinary retention, and postoperative pain at 6 months.

RESULTS

A total of 18 trials, including 2617 patients with 2878 hernias, were included in this meta-analysis. In contrast to the fixation group, the nonfixation group was associated with lower postoperative pain scores at 24 hours and 6 months, a shorter mean operative time, and a lower incidence of urinary retention. There were no significant differences between the 2 types of procedures in terms of the rate of recurrence for patients with an inguinal hernia orifice smaller than 4 cm in size.

CONCLUSIONS

The nonfixation technique is an effective method to reduce urinary retention, mean operative time, and postoperative pain at 24 hours and at 6 months; however, the rate of recurrence was comparable to that of the fixation method.

Safety of unfixed mesh in laparoscopic total extraperitoneal inguinal hernia repair: A meta-analysis of randomized controlled trials

BACKGROUND

Whether the effect of the unfixed mesh during laparoscopic total extraperitoneal (TEP) inguinal hernia repair can lead to hernia recurrence remains controversial.

METHODS

The PubMed, Cochrane Library, and EMBASE databases were searched to retrieve clinical randomized controlled trials (RCTs) comparing nonfixation of mesh and fixation of mesh in TEP inguinal hernia repair, and we performed a metaanalysis with RevMan 5.3 software.

RESULTS

Fifteen RCTs were included in the metaanalysis, which showed that the operation time (P = 0.001) of the unfixed mesh group was shorter than that of the fixed mesh group; additionally, the postoperative 24-h pain score (P = 0.04) and incidence of urinary retention (P = 0.001) were lower in the unfixed mesh group. There was no significant difference between the unfixed mesh group and the fixed mesh group in terms of hospital stay (P = 0.47), time to resume normal activities (P = 0.51), incidence of haematoma (P = 0.96), incidence of chronic pain (P = 0.20), and recurrence rate (P = 0.09).

CONCLUSION

Unfixed mesh in TEP inguinal hernia repair shows no elevated recurrence rates compared to fixed mesh and is clinically safe.

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

PURPOSE

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

METHODS

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

RESULTS

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

CONCLUSIONS

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

Comparison of mesh fixation and non-fixation in transabdominal preperitoneal (TAPP) inguinal hernia repair: a randomized control trial

INTRODUCTION

Mesh fixation in inguinal hernia repair, has been a controversial subject for many years. Therefore, in this study, we evaluated and compared fixation and non-fixation of mesh in Transabdominal Preperitoneal (TAPP) Inguinal hernia repair.

METHODS

In this randomized control trial, 100 patients diagnosed with unilateral inguinal hernia were included. We divided the study population into two groups of fifty. For both groups, a 15 × 13 cm Prolene(polypropylene) mesh was used for repair. In the fixation group, mesh was fixed to the abdominal wall by endoscopic tacks, while in the non-fixation group, mesh was secured at the proper place without any fixation. Postoperative outcomes were complications, recurrence, and pain intensity after 1-, 3- and 6-months.

RESULTS

Postoperative pain intensity in the 1st month [Median of 2 and 0, (P < 0.001)], and 3rd month [Median of 0.5 and 0, (P < 0.001)], in the fixation group were significantly higher than the non-fixation group. However, 6 months after surgery, pain intensity was almost similar for both groups. In the 6th postoperative month, only one patient experienced recurrence who was in the fixation group. The rate of recurrence and urinary retention between the groups was not significant.

CONCLUSION

It was observed that until 6 months after surgery patients who received the non-fixating method of TAPP repair experienced lower levels of pain in comparison to the fixation group while other complications did not differ between the two groups. This trail was registered at www.irct.ir with Trial Registration Number of IRCT20210224050491N1.

Seroma-prevention strategies in minimally invasive inguinal hernia repair

BACKGROUND:

The rise of minimally invasive inguinal hernia repair has seen both the laparoscopic and robotic approaches increase in popularity in recent years. Despite this, seroma formation remains a common complication, and the aim of this study is to evaluate the current evidence on seroma-prevention strategies in minimally invasive inguinal hernia repair.

MATERIALS AND METHODS:

Four databases (PubMed, Scopus, Embase, and Cochrane Library) were searched from inception to November 15, 2021. All studies describing the use of intraoperative adjuncts to reduce postoperative seroma formation in patients undergoing laparoscopic or robotic inguinal and inguinoscrotal hernia repair were included. Meta-analyses were performed using Review Manager (Version 5.4).

RESULTS:

2,382 articles were identified in the initial database search, and 40 articles were included in the final analysis. In this analysis, there was a significantly lower incidence of seroma formation in the drain group when compared to the no-drain group (P < 0.00001). Other strategies aimed at reducing the dead space involving the transversalis fascia (TF) and hernia sac such as TF inversion with tacking, Endoloop closure of TF, barbed suture closure of TF, distal sac fixation, and complete dissection of the sac have shown promising results as well.

CONCLUSIONS:

While there is currently insufficient evidence to recommend the routine use of any one of the interventions analyzed, the use of drains, the management of the TF, and the hernia sac have showed potential in reducing seroma formation.

Surgical Clinical Trials in India: Underutilized Opportunities

Clinical trials in Surgery are central to research; however, very few surgical clinical trials are conducted in India. Such paucity of surgical trials is a cause for concern, and prompted us to explore the recent landscape of surgical trials in India. We reviewed all clinical trials from general surgery or subspecialties of general surgery registered with the Clinical Trials Registry of India website between 2018 to 15 th May 2021. Specific details such as the surgical subspecialty, study design, multicentric or single institution and funding were obtained. We found a total of 16,710 trials, out of these 4119 (24.6%) were related to all surgical fields. Only 136 (0.8%) trials were found from general surgery and its subspecialties. Most trials were registered from Central Government Institutions (48%), followed by State Government Medical Colleges (11%). Most number of trials was registered from GI surgery (32%). Most (90.5%) trials were single centre based. Common barriers to research are well known; if the State Government Medical Colleges can mentor a culture of research from an early stage of surgical training it can improve research productivity. Multicentre trials, involving smaller hospitals from tier 2 and tier 3 cities, are a potential solution to one of the major obstacles of surgical trials i.e. small number of patients; especially in this pandemic induced draught of elective surgical operations. A positive change in attitude of surgeons and provision of necessary funding can encourage more surgical clinical trials in India.

A Bibliometric Analysis of Published Literature in Postoperative Pain in Elderly Patients in Low- and Middle-Income Countries

Postoperative pain (POP) remains a major challenge for surgeons and anesthesiologists worldwide, especially in low- and middle-income countries. Elderly patients are at higher risk for undertreatment of pain. Despite that, there is a paucity of papers addressing POP among this population in developing countries. This study aimed to provide a bibliometric analysis of the literature concerning postoperative pain in elderly patients from low- and middle-income countries. It was performed an extensive search of papers on this subject through the Web of Science and Scopus database using a series of uniterms and, including publications from 2001 to 2021. Publication quality was assessed by using total citation frequency, average citations per item and other citation indexes. Citation indexes were low, with the highest reaching 15 citations. In conclusion, few studies of postoperative pain in the elderly in countries with medium and low income, indicating a need that has not yet been met for this population and in these areas of the world. The published studies were not specifically aimed at the elderly, had limited impact, low international visibility. They were not epidemiological studies and are not robust, weakening knowledge and decision-making towards policies directed at this vulnerable population.

Outcomes on mesh fixation vs non-fixation in laparoscopic totally extra peritoneal inguinal hernia repair: a comparative study

OBJECTIVES

Inguinal hernia repair is one of the most common general surgical procedure, and laparoscopic approach gained popularity over the open approach. This study aimed to compare the clinical effects of TEP inguinal hernioplasty with or without mesh fixation. The primary outcome was acute post-operative pain.

MATERIAL AND METHODS

A retrospective comparative study on a prospectively collected data was conducted in a large DGH in England between Janu- ary 2017 and December 2019 on 47 patients. The patients were divided into two groups. In group A, mesh fixation was performed with absorbable tackers and in group B no fixation was performed. Patients were followed up to 18 months postoperatively. Data was collected on post-operative pain, cost, recurrences and time taken to return to normal activities. Patients with lower midline scar and complicated inguinal hernias were excluded.

RESULTS

Out of the 47 patients 53% (n= 25) were in group A and 47% (n= 22) in group B. All the patients in both groups were male. The mean postopera- tive pain score at 72h in group A was 7.12 (SD 1.13) and 4.91 (SD 1.23) in group B (p <0.001). Group B patients have taken shorter time to return to normal activities in comparison to group A (p <0.001), while recurrence (2%) rate is higher in group B (p> 0.05).

CONCLUSION

Pain and time taken to return to normal work postoperatively were significantly less in the non-fixation group. The study recommends non-fixation over fixation as it is feasible, cost-effective, causes less post-operative pain and no differences in terms of recurrences.

Fixation versus no fixation in laparoscopic totally extraperitoneal repair of primary inguinal hernia-a systematic review and meta-analysis of randomized controlled trials

INTRODUCTION

The necessity of mesh fixation in laparoscopic totally extraperitoneal (TEP) inguinal hernia repair remains controversial. We performed a systematic review and meta-analysis to compare the effectiveness of mesh fixation versus no fixation in laparoscopic TEP repair for primary inguinal hernia.

MATERIALS AND METHODS

PubMed, EMBASE, and Cochrane databases were searched for relevant articles from January 1992 until May 2020. All trials that compared fixation versus no fixation in TEP repairs for inguinal herniae were included. Recurrent and femoral herniae were excluded from the current analysis. The primary outcome measure was recurrence while secondary outcomes included postoperative pain at 24 h, mean operative time, urinary retention, and seroma rates. Random effects models were used to calculate pooled effect size estimates. Sensitivity analyses were also carried out.

RESULTS

Eight randomized controlled trials were included capturing 557 patients and 715 inguinal herniae. On random effects analysis, there were no significant differences between fixation and no fixation with respect to recurrence (RD 0.00, 95% CI = - 0.01 to 0.01, p = 1.00), operative time (MD 1.58 min, 95% CI = - 0.22 to 3.37, p = 0.09), seroma (OR = 0.70, 95% CI = 0.28 to 1.74, p = 0.44), or urinary retention (RD 0.09, 95% CI = - 0.18 to 0.36, p = 0.53). However, fixation was associated with more pain at 24 h (MD 0.93, 95% CI = 0.20 to 1.66, p = 0.01).

CONCLUSIONS

Mesh fixation in laparoscopic TEP repair for primary inguinal herniae is associated with increased postoperative pain at 24 h but similar recurrence, seroma, and urinary retention. Therefore, it may be omitted.

Meta-analysis of laparoscopic groin hernia repair with or without mesh fixation

OBJECTIVES

To evaluate comparative outcomes of laparoscopic repair of groin hernia with and without mesh fixation.

METHODS

MEDLINE; EMBASE; CINAHL; CENTRAL; the World Health Organization International Clinical Trials Registry; ClinicalTrials.gov; ISRCTN Register, and bibliographic reference lists were systematically checked. Combination of free text and controlled vocabulary search adapted were applied to thesaurus headings, search operators and limits in each of the above databases. Post-operative pain, procedure time, conversion rate, length of hospital stay, time taken to normal activities, overall complications, seroma formation, cost and recurrence were the outcome parameters. Combined overall effect sizes were calculated using fixed-effect or random-effects models. The work has been reported in line with PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) and AMSTAR (Assessing the methodological quality of systematic reviews) Guidelines. This protocol was registered at the International Prospective Register of Systematic Reviews (registration number: CRD42019139564).

RESULTS

We identified 13 randomized controlled trials reporting a total of 1731 patients (2021 groin hernia) evaluating outcomes of laparoscopic hernia repair with mesh fixation using stapler or tacker (n = 853 patients, 999 hernia) and without mesh fixation (n = 878 patients, 1022 hernia). Mesh Fixation was associated with significantly higher post-operative pain assessed by visual analogue scale (VAS) (MD: 0.59; 95% CI, 0.05-1.13, P = 0.03) and longer procedure time (MD: 2.00; 95% CI, 0.98-3.02, P = 0.0001), compared to no fixation technique. However, there was no significant difference in length of hospital stay (MD:0.09; 95% CI, -0.05-0.23, P = 0.19), time to normal activities, (MD: 0.12; 95% CI, -0.37-0.61, P = 0.69), overall complications (OR: 1.05; 95% CI, 0.77-1.43, P = 0.76), seroma formation (OR: 0.63; 95% CI, 0.39-1.00, P = 0.05) and recurrence rate (RD: 0.00; 95% CI, -0.01-0.01, P = 0.84) between two groups.

CONCLUSIONS

Avoiding mesh fixation with a stapler or tacker during laparoscopic groin hernia repair may reduce postoperative pain and procedure time. Future studies are encouraged to evaluate cost effectiveness of each approach.

Comparison of short- to mid-term efficacy of nonfixation and permanent tack fixation in laparoscopic total extraperitoneal hernia repair: A systematic review and meta-analysis

OBJECTIVE

We systematically reviewed the literature and pooled data for a meta-analysis to compare the efficacy and safety of mesh fixation and nonfixation in laparoscopic total extraperitoneal (TEP) hernia repair.

MATERIALS AND METHODS

We performed a systematic search of PubMed® and a Cochrane review for all randomized controlled trials that compared the efficacy and complications of mesh fixation versus nonfixation in TEP hernia repair. The evaluated outcomes included perioperative (operative time and conversion rate) and postoperative parameters (pain scores, duration of hospital stay, surgical complications including seroma, delayed return of bladder function, chronic pain, and recurrence). Cochrane Collaboration Review Manager Software (RevMan®, version 5.2.6) was used for statistical analysis.

RESULTS

Ten trials met the inclusion criteria and were included in a pooled analysis. In total, 1099 patients (1467 hernias) had received TEP hernia repair (748 and 719 hernia defects in the nonfixation and fixation groups, respectively). The nonfixation group required shorter operative time (weighted mean difference [WMD] = -2.36 min, P = 0.0006) and had less pain on postoperative day 1 (WMD = -0.44, P = 0.04) than the fixation group. No significant differences were observed between groups with regard to conversion rate, hospital stay, recurrence rate, or complication rate. However, the incidence of postoperative urine retention was higher in the fixation group (odds ratio = 0.26, P = 0.03).

CONCLUSION

For patients with a nonrecurrent uncomplicated hernia defect with the size <3 cm, nonfixation yielded comparable efficacy with mesh fixation, but less short-term postoperative pain, and a lower risk of urine retention. In addition, the nonfixation method involved a shorter operative time and lower costs. However, no difference in the incidence of chronic pain was observed.

Mesh fixation technique in totally extraperitoneal inguinal hernia repair - A network meta-analysis

Laparoscopic totally extra-peritoneal inguinal hernia repair is the standard option for inguinal hernia treatment. However, there are various types of mesh fixation and their relative uses are still controversial. This network meta-analysis was conducted to compare and rank the different fixations available for TEP. Medline and Scopus databases were search until February 1, 2017 and using randomized controlled trials comparing outcomes between different mesh fixation techniques were included. The results demonstrated that fifteen RCTs (n = 1783) were eligible for pooling. Five types of mesh fixation were used; metallic tack, no-fixation, absorbable tack, suture, and glue. Network meta-analysis that use metallic tack as the reference, indicated that suture and glue both carried a lower risk of recurrence with pooled risk ratios (RR) of 0.29 (95% CI 0.00, 18.81) and 0.29 (0.07, 1.30), respectively. For overall complications, absorbable tack had lower risk (0.63, 95% CI: 0.02, 16.13). However, none of these estimates reached statistical significance. So, this network meta-analysis suggests that glue and absorbable tack might be best in lowering recurrence risk and complications. However, a large scale RCT is still needed to confirm these results.

TEP for elective primary unilateral inguinal hernia repair in men: what do we know?

INTRODUCTION

Based on the new international guidelines for groin hernia management, there is no one surgical technique that is suited to all patient characteristics and diagnostic findings. Therefore, a tailored approach should be used. Here, a distinction must be made between primary unilateral inguinal hernia in men and in women, bilateral inguinal hernia, scrotal inguinal hernia, inguinal hernia following pelvic and lower abdominal procedures, patients with severe cardiopulmonary complications, recurrent inguinal hernias and incarcerated inguinal and femoral hernias. This paper now explores the relevant studies on TEP for elective primary unilateral inguinal hernia in men, which constitutes the most common indication for repair.

MATERIAL

A systematic search of the available literature was performed in February 2019 using Medline, PubMed, Scopus, Embase, Springer Link and the Cochrane Library. Only meta-analyses, systematic reviews, RCTs and comparative registry studies were considered. 117 publications were identified as relevant.

RESULTS

RCTs and comparative registry analyses demonstrated the advantages of TEP with regard to postoperative complications, complication-related reoperations, and postoperative and chronic pain compared with Lichtenstein repair for elective primary unilateral inguinal hernia repair in men. No relevant differences were found compared with TAPP. Mesh fixation is not needed in TEP, but heavyweight meshes result in a lower recurrence rate. Extraperitoneal bupivacaine analgesia vs placebo does not demonstrate any advantages, but drainage is advantageous for seroma prophylaxis. The risk of chronic pain is negatively influenced by small defects, younger patient age, preoperative pain, higher BMI, postoperative complications, higher ASA score and risk factors.

CONCLUSION

For the subgroup of elective primary unilateral inguinal hernia in men, accounting for a proportion of less than 50% of the total collective, advantages were identified for TEP compared with open Lichtenstein repair but not versus TAPP.

Totally extraperitoneal inguinal hernia repair with or without fixation leads to similar results. Outcome of randomized prospective trial

Introduction

The use of implants in inguinal hernia repair has reduced its recurrence rate. However, postoperative groin pain still remains an unresolved problem. There are suggestions that in totally extraperitoneal inguinal hernia repair (TEP-IHR) two of the likely factors responsible for pain are use of fixation and the type of fixation used.

Aim

To evaluate the impact of mesh fixation on the incidence of postoperative pain, restriction of physical activities, hernia recurrence risk, return to normal activities and demand for analgesics in patients after unilateral TEP-IHR.

Material and methods

Unilateral TEP-IHR was performed in 139 male patients randomized to three groups: self-gripping mesh (SG), lightweight mesh (L) and lightweight mesh with fixation (LF). Full study-inclusion criteria were met by 110 patients; 43, 18 and 49 in groups SG, L and LF respectively. Follow-up occurred on the 1^st, 2^nd, and 7^th day and 3, 6, 12 months postoperatively. The numeric rating scale (NRS) was used to assess pain and the EuraHS-QoL (European Registry for Abdominal Wall Hernias Quality of Life Score) questionnaire to compare quality of life (QoL) prior to surgery and one year later.

Results

No statistically significant differences were observed between study groups with regard to the incidence rate and intensity of acute post-operative pain, chronic pain, analgesic demand, return to normal activity, hernia recurrence rate and post-operative QoL.

Conclusions

Lack of fixation in TEP-IHR does not increase the risk of hernia recurrence, and its presence does not significantly worsen the treatment results; especially it does not increase the incidence of chronic pain.

Causes of recurrence in laparoscopic inguinal hernia repair

PURPOSE

Recurrence after laparoscopic inguinal herniorrhaphy is poorly understood. Reports suggest that up to 13% of all inguinal herniorrhaphies worldwide, irrespective of the approach, are repaired for recurrence. We aim to review the risk factors responsible for these recurrences in laparoscopic mesh techniques.

METHODS

A search of the Medline, Embase, Science Citation Index, Current Contents and PubMed databases identified English language, peer reviewed articles on the causes of recurrence following laparoscopic mesh inguinal herniorrhaphy published between 1990 and 2018. The search terms included 'Laparoscopic methods', 'Inguinal hernia; Mesh repair', 'Recurrence', 'Causes', 'Humans'.

RESULTS

The literature revealed several contributing risk factors that were responsible for recurrence following laparoscopic mesh inguinal herniorrhaphy. These included modifiable and non-modifiable risk factors related to patient and surgical techniques.

CONCLUSIONS

Recurrence can occur at any stage following inguinal hernia surgery. Patients' risk factors such as higher BMI, smoking, diabetes and postoperative surgical site infections increase the risk of recurrence and can be modified. Amongst the surgical factors, surgeon's experience, larger mesh with better tissue overlap and careful surgical techniques to reduce the incidence of seroma or hematoma help reduce the recurrence rate. Other factors including type of mesh and fixation of mesh have not shown any difference in the incidence of recurrence. It is hoped that future randomized controlled trials will address some of these issues and initiate preoperative management strategies to modify some of these risk factors to lower the risk of recurrence following laparoscopic inguinal herniorrhaphy.

International guidelines for groin hernia management

INTRODUCTION

Worldwide, more than 20 million patients undergo groin hernia repair annually. The many different approaches, treatment indications and a significant array of techniques for groin hernia repair warrant guidelines to standardize care, minimize complications, and improve results. The main goal of these guidelines is to improve patient outcomes, specifically to decrease recurrence rates and reduce chronic pain, the most frequent problems following groin hernia repair. They have been endorsed by all five continental hernia societies, the International Endo Hernia Society and the European Association for Endoscopic Surgery.

METHODS

An expert group of international surgeons (the HerniaSurge Group) and one anesthesiologist pain expert was formed. The group consisted of members from all continents with specific experience in hernia-related research. Care was taken to include surgeons who perform different types of repair and had preferably performed research on groin hernia surgery. During the Group's first meeting, evidence-based medicine (EBM) training occurred and 166 key questions (KQ) were formulated. EBM rules were followed in complete literature searches (including a complete search by The Dutch Cochrane database) to January 1, 2015 and to July 1, 2015 for level 1 publications. The articles were scored by teams of two or three according to Oxford, SIGN and Grade methodologies. During five 2-day meetings, results were discussed with the working group members leading to 136 statements and 88 recommendations. Recommendations were graded as "strong" (recommendations) or "weak" (suggestions) and by consensus in some cases upgraded. In the Results and summary section below, the term "should" refers to a recommendation. The AGREE II instrument was used to validate the guidelines. An external review was performed by three international experts. They recommended the guidelines with high scores. The risk factors for inguinal hernia (IH) include: family history, previous contra-lateral hernia, male gender, age, abnormal collagen metabolism, prostatectomy, and low body mass index. Peri-operative risk factors for recurrence include poor surgical techniques, low surgical volumes, surgical inexperience and local anesthesia. These should be considered when treating IH patients. IH diagnosis can be confirmed by physical examination alone in the vast majority of patients with appropriate signs and symptoms. Rarely, ultrasound is necessary. Less commonly still, a dynamic MRI or CT scan or herniography may be needed. The EHS classification system is suggested to stratify IH patients for tailored treatment, research and audit. Symptomatic groin hernias should be treated surgically. Asymptomatic or minimally symptomatic male IH patients may be managed with "watchful waiting" since their risk of hernia-related emergencies is low. The majority of these individuals will eventually require surgery; therefore, surgical risks and the watchful waiting strategy should be discussed with patients. Surgical treatment should be tailored to the surgeon's expertise, patient- and hernia-related characteristics and local/national resources. Furthermore, patient health-related, life style and social factors should all influence the shared decision-making process leading up to hernia management. Mesh repair is recommended as first choice, either by an open procedure or a laparo-endoscopic repair technique. One standard repair technique for all groin hernias does not exist. It is recommended that surgeons/surgical services provide both anterior and posterior approach options. Lichtenstein and laparo-endoscopic repair are best evaluated. Many other techniques need further evaluation. Provided that resources and expertise are available, laparo-endoscopic techniques have faster recovery times, lower chronic pain risk and are cost effective. There is discussion concerning laparo-endoscopic management of potential bilateral hernias (occult hernia issue). After patient consent, during TAPP, the contra-lateral side should be inspected. This is not suggested during unilateral TEP repair. After appropriate discussions with patients concerning results tissue repair (first choice is the Shouldice technique) can be offered. Day surgery is recommended for the majority of groin hernia repair provided aftercare is organized. Surgeons should be aware of the intrinsic characteristics of the meshes they use. Use of so-called low-weight mesh may have slight short-term benefits like reduced postoperative pain and shorter convalescence, but are not associated with better longer-term outcomes like recurrence and chronic pain. Mesh selection on weight alone is not recommended. The incidence of erosion seems higher with plug versus flat mesh. It is suggested not to use plug repair techniques. The use of other implants to replace the standard flat mesh in the Lichtenstein technique is currently not recommended. In almost all cases, mesh fixation in TEP is unnecessary. In both TEP and TAPP it is recommended to fix mesh in M3 hernias (large medial) to reduce recurrence risk. Antibiotic prophylaxis in average-risk patients in low-risk environments is not recommended in open surgery. In laparo-endoscopic repair it is never recommended. Local anesthesia in open repair has many advantages, and its use is recommended provided the surgeon is experienced in this technique. General anesthesia is suggested over regional in patients aged 65 and older as it might be associated with fewer complications like myocardial infarction, pneumonia and thromboembolism. Perioperative field blocks and/or subfascial/subcutaneous infiltrations are recommended in all cases of open repair. Patients are recommended to resume normal activities without restrictions as soon as they feel comfortable. Provided expertise is available, it is suggested that women with groin hernias undergo laparo-endoscopic repair in order to decrease the risk of chronic pain and avoid missing a femoral hernia. Watchful waiting is suggested in pregnant women as groin swelling most often consists of self-limited round ligament varicosities. Timely mesh repair by a laparo-endoscopic approach is suggested for femoral hernias provided expertise is available. All complications of groin hernia management are discussed in an extensive chapter on the topic. Overall, the incidence of clinically significant chronic pain is in the 10-12% range, decreasing over time. Debilitating chronic pain affecting normal daily activities or work ranges from 0.5 to 6%. Chronic postoperative inguinal pain (CPIP) is defined as bothersome moderate pain impacting daily activities lasting at least 3 months postoperatively and decreasing over time. CPIP risk factors include: young age, female gender, high preoperative pain, early high postoperative pain, recurrent hernia and open repair. For CPIP the focus should be on nerve recognition in open surgery and, in selected cases, prophylactic pragmatic nerve resection (planned resection is not suggested). It is suggested that CPIP management be performed by multi-disciplinary teams. It is also suggested that CPIP be managed by a combination of pharmacological and interventional measures and, if this is unsuccessful, followed by, in selected cases (triple) neurectomy and (in selected cases) mesh removal. For recurrent hernia after anterior repair, posterior repair is recommended. If recurrence occurs after a posterior repair, an anterior repair is recommended. After a failed anterior and posterior approach, management by a specialist hernia surgeon is recommended. Risk factors for hernia incarceration/strangulation include: female gender, femoral hernia and a history of hospitalization related to groin hernia. It is suggested that treatment of emergencies be tailored according to patient- and hernia-related factors, local expertise and resources. Learning curves vary between different techniques. Probably about 100 supervised laparo-endoscopic repairs are needed to achieve the same results as open mesh surgery like Lichtenstein. It is suggested that case load per surgeon is more important than center volume. It is recommended that minimum requirements be developed to certify individuals as expert hernia surgeon. The same is true for the designation "Hernia Center". From a cost-effectiveness perspective, day-case laparoscopic IH repair with minimal use of disposables is recommended. The development and implementation of national groin hernia registries in every country (or region, in the case of small country populations) is suggested. They should include patient follow-up data and account for local healthcare structures. A dissemination and implementation plan of the guidelines will be developed by global (HerniaSurge), regional (international societies) and local (national chapters) initiatives through internet websites, social media and smartphone apps. An overarching plan to improve access to safe IH surgery in low-resource settings (LRSs) is needed. It is suggested that this plan contains simple guidelines and a sustainability strategy, independent of international aid. It is suggested that in LRSs the focus be on performing high-volume Lichtenstein repair under local anesthesia using low-cost mesh. Three chapters discuss future research, guidelines for general practitioners and guidelines for patients.

CONCLUSIONS

The HerniaSurge Group has developed these extensive and inclusive guidelines for the management of adult groin hernia patients. It is hoped that they will lead to better outcomes for groin hernia patients wherever they live. More knowledge, better training, national audit and specialization in groin hernia management will standardize care for these patients, lead to more effective and efficient healthcare and provide direction for future research.

Factors associated with hernia recurrence after laparoscopic total extraperitoneal repair for inguinal hernia: a 2-year prospective cohort study

BACKGROUND

Laparoscopic total extraperitoneal repair (TEP) of inguinal hernia has been associated with higher rates of recurrence compared to open methods. The aim of the present study was to determine independent risk factors for recurrence within 2 years after TEP.

METHODS

This was a single-centre prospective cohort study with consecutive inclusion of patients undergoing inguinal hernia repair from 2010 to 2014. Systematic follow-up was conducted 6 months and 2 years postoperatively. Risk factors for recurrence after 2 years were analysed in univariate and multivariate analyses.

RESULTS

A total of 1194 patients underwent TEP for inguinal or femoral hernia in the study period, of which 1047 were eligible for analyses. After 2 years, 56 (5.3%) patients had presented with recurrence. The following factors were associated with recurrence in univariate analyses: body mass index (BMI) >30 (HR 3.64; p = 0.011), medial vs. lateral hernia (HR 2.37; p = 0.004), repair of recurrent hernia vs. primary repair (HR 2.12; p = 0.049), and length of stay >1 day (HR 1.77; p = 0.043). In multivariate analyses, factors independently associated with recurrence after 2 years were BMI >30 (HR 3.74; p = 0.026) and medial vs. lateral hernia (HR 2.39; p = 0.004).

CONCLUSION

The recurrence rate after TEP is higher than reported after open hernia repair. Attempts to decrease the rate should be persuaded. Good surgical technique with precise dissection and correct placement of the mesh, especially in medial hernias and obese patients, may be key points to improve outcomes after TEP.

Mesh fixation in endoscopic inguinal hernia repair: evaluation of methodology based on a systematic review of randomised clinical trials

BACKGROUND

The issue of mesh fixation in endoscopic inguinal hernia repair is frequently debated and still no conclusive data exist on differences between methods regarding long-term outcome and postoperative complications. The quantity of trials and the simultaneous lack of high-quality evidence raise the question how future trials should be planned.

METHODS

PubMed, EMBASE and the Cochrane Library were searched, using the filters "randomised clinical trials" and "humans". Trials that compared one method of mesh fixation with another fixation method or with non-fixation in endoscopic inguinal hernia repair were eligible. To be included, the trial was required to have assessed at least one of the following primary outcome parameters: recurrence; surgical site infection; chronic pain; or quality-of-life.

RESULTS

Fourteen trials assessing 2161 patients and 2562 hernia repairs were included. Only two trials were rated as low risk for bias. Eight trials evaluated recurrence or surgical site infection; none of these could show significant differences between methods of fixation. Two of 11 trials assessing chronic pain described significant differences between methods of fixation. One of two trials evaluating quality-of-life showed significant differences between fixation methods in certain functions.

CONCLUSION

High-quality evidence for differences between the assessed mesh fixation techniques is still lacking. From a socioeconomic and ethical point of view, it is necessary that future trials will be properly designed. As small- and medium-sized single-centre trials have proven unable to find answers, register studies or multi-centre studies with an evident focus on methodology and study design are needed in order to answer questions about mesh fixation in inguinal hernia repair.

Comparison of mesh fixation and non-fixation in laparoscopic totally extraperitoneal inguinal hernia repair

PURPOSE

The purpose of this study was to compare laparoscopic total extraperitoneal (TEP) hernia repair procedures with or without mesh fixation for non-recurrent inguinal hernia.

METHODS

100 male patients with non-recurrent inguinal hernia (62 unilateral and 38 bilateral) were included in the study. The patients were randomly assigned to either the mesh fixation group (n = 50) or the mesh non-fixation group (n = 50). The operative and follow-up data of the two groups were analyzed and compared in terms of recurrence rates, postoperative pain, length of hospital stay, and postoperative changes in testicular arterial blood flow.

RESULTS

Pain scores were significantly higher in the mesh fixation group prior to discharge and at the 1st postoperative month (p = 0.034 and 0.001, respectively). Necessity to use narcotic analgesics was higher in the fixation group prior to discharge (p = 0.025). Urinary retention was significantly more frequent in the fixation group than in the non-fixation group. (p = 0.007). The mean operative time and length of hospital stay were similar in both groups. Preoperative and postoperative measurements of testicular arterial blood flow showed a substantial but not statistically significant difference for the frequency of impairment (14.2% in the fixation group and 5.8% in the non-fixation group) (p = 0.176). At long-term follow-up, no recurrence and no nerve injury were determined.

CONCLUSION

Fixation of the mesh to the abdominal wall has been associated with various postoperative complications for no additional benefit in lowering recurrence rates. For non-recurrent inguinal hernia, non-fixation of the mesh is safe and reliable. Further studies with larger sample sizes are necessary for subgroup analyses.

Convalescence after laparoscopic inguinal hernia repair: a qualitative systematic review

BACKGROUND

Duration of convalescence after inguinal hernia repair is of major socio-economic interest and an often reported outcome measure. The primary aim was to perform a critical analysis of duration of convalescence from work and activity and secondary to identify risk factors for unexpected prolonged convalescence after laparoscopic inguinal hernia repair.

METHODS

A qualitative systematic review was conducted. PubMed, Embase and the Cochrane database were searched for trials reporting convalescence after laparoscopic inguinal hernia repair in the period from January 1990 to January 2016. Furthermore, snowball search was performed in reference lists of identified articles. Randomized controlled trials and prospective comparative or non-comparative trials of high quality were included. Trials with ≥100 patients, >18 years of age and manuscripts in English were included. Scoring systems were used for assessment of quality.

RESULTS

The literature search identified 1039 papers. Thirty-four trials were included in the final review including 14,273 patients. There was overall a large variation in duration of convalescence. Trials using non-restrictive recommendations of 1-2 days or "as soon as possible to return to all activities" reported overall a shorter duration of convalescence compared with trials not using recommendations for convalescence. Strenuous physical activity at work, strenuous leisure activity and patients with expectations of a prolonged period of convalescence may be risk factors for prolonged convalescence extending more than a few days after laparoscopic inguinal hernia repair.

CONCLUSIONS

Patients should be recommended a duration of 1-2 days of convalescence after laparoscopic inguinal hernia repair. Short and non-restrictive recommendations may reduce duration of convalescence without increasing risk of pain, complications or recurrence rate.

Prospective, randomized and controlled study of mesh displacement after laparoscopic inguinal repair: fixation versus no fixation of mesh

INTRODUCTION

Repair of inguinal hernia is one of the most common elective operations performed in general surgery practice. Mesh hernia repair became the gold standard because of its low recurrence rate in comparison with non-tension-free repair. Laparoscopic approach seems to have potential advantages over open techniques, including faster recovery and reduced acute and chronic pain rate. Laparoscopic mesh fixation is usually performed using staples, which is associated with higher cost and risk for chronic pain. Recently, the role of mesh fixation has been questioned by several surgeons.

AIM

To evaluate mesh displacement in patients undergoing laparoscopic inguinal hernia repair comparing mesh fixation with no fixation.

METHODS

From January 2012 to May 2014, 60 consecutive patients with unilateral inguinal hernia were randomized into two groups: control group--10 patients underwent totally extraperitoneal (TEP) repair with mesh fixation; NO FIX group-50 patients underwent TEP repair with no mesh fixation. Mesh was marked with three 3-mm surgical clips at its medial inferior, medial superior and lateral inferior corners. Mesh displacement was measured by comparing an initial X-ray, performed in the immediate postoperative period, with a second X-ray obtained 30 days later.

RESULTS

The mean displacement of all three clips in control group was 0.1-0.35 cm (range 0-1.2 cm), while in NO FIX group was 0.1-0.3 cm (range 0-1.3 cm). The overall displacement of control and NO FIX group did not show any difference (p = 0.50).

CONCLUSION

Fixation of the mesh for TEP repair is unnecessary. TEP repair with no mesh fixation is safe and is not associated with increased risk of mesh displacement.