Telescopic Dissection vs. Balloon Dissection During Laparoscopic TEP Inguinal Hernia Repair

Study Overview
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Brief Summary
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The purpose of this study is to determine if the surgical technique for creation of extraperitoneal space during laparoscopic TEP inguinal hernia repair (telescopic dissection or balloon dissection) has an impact on operative times, early postoperative pain scores, surgical complications and rate of hernia recurrence following laparoscopic TEP inguinal hernia repair.

Detailed Description
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Minimally invasive approaches have been successfully incorporated into the surgical armamentarium of inguinal hernia repair, with proven benefits for decreased postoperative pain and earlier return to work. Laparoscopic inguinal hernia repair is more commonly performed through the transabdominal preperitoneal (TAPP) approach or the totally extraperitoneal (TEP) approach. The TEP approach has been proven to have equivalent recurrence rates, decreased postoperative pain, earlier ambulation and return to work when compared to the open, tension-free repairs. Additionally, when compared to TAPP, the TEP approach has also been associated with decreased postoperative pain, shorter operative times and equivalent rates of postoperative complications and hernia recurrence. A key step in the TEP procedure is the creation of the extraperitoneal space, which can be performed by two different techniques: telescopic dissection or balloon dissection.Telescopic dissection is the creation of the extraperitoneal space with blunt dissection performed with the laparoscopic probe. Telescopic dissection was initially described in the original paper describing the TEP procedure, in 1992 by Ferzli et al. To date, telescopic dissection is still used in many centers around the globe. In order to facilitate the creation of the initial working space, disposable dissection balloons have been developed and are commercially available. Balloon dissection is now the most commonly used method for creation of the extraperitoneal space for TEP procedure in the United States. A randomized, prospective multicenter study conducted between 1994 and 1997 and published in 2001 by Bringmam and colleagues has compared operative times, conversion rates, postoperative morbidity and time to return to work between patients in which the TEP procedure was performed with or without the balloon dissector. In this study, the use of the balloon was associated with lower conversion rates and statistically, but perhaps not clinically, significantly shorter operative times (9 minutes difference). No difference was seen in postoperative morbidity, recurrence rates or time to return to work between the groups. Of note, the surgeons performing these procedures were still at an early point of their learning curve for the TEP procedure, which might have influenced the results, especially for the group without the balloon. Low-cost alternatives have been proposed to substitute the commercially available balloon dissector, especially in developing countries where the access to the balloon dissector is restricted. Despite the fact that the TEP procedure has become more popular in the last 15 years, with surgeons being each time more proficient in this operation, there is a paucity of data comparing cost and surgical outcomes among telescopic and balloon dissection. Furthermore, according to current consensus, the use of a balloon dissector is especially recommended during the learning period when surgeons are still unfamiliar with the preperitoneal anatomy. Especially for expert surgeons, delineation of the inguinal area and dissection in the creation of extraperitoneal space can be performed as safe and efficient with telescopic dissection. The investigator's institution has in its staff, three expert surgeons, with a robust experience in the TEP procedure, performed either telescopic or balloon dissection. To help determine if the use of the balloon dissector is associated with a significant decrease in operative times when compared to telescopic dissection, the investigators aim to conduct a randomized controlled trial using the Americas Hernia Society Quality Collaborative (AHSQC) registry. The AHSQC is a nationwide registry designed to improve the value of hernia care using real-time continuous quality improvement principles. Data pertaining to baseline and intraoperative variables, short and long term outcomes are collected prospectively for quality improvement purposes. The information collected in the AHSQC offers a natural repository of information that can be used for research, in addition to its quality improvement purpose. The investigators hypothesize that at their institution, during TEP repairs, telescopic dissection will be associated with a 15-minute increase in total operative times for a unilateral inguinal hernia, when compared to the balloon dissection. Specific Aim #1: To determine if the use of a balloon dissector by an experienced surgeon is associated with a significant decrease in total operative time compared to telescopic dissection for the creation of the extraperitoneal space during laparoscopic TEP inguinal hernia repair Specific Aim #2: To determine if there is a difference in postoperative pain scores at 1 day, 7 days and 30 days postoperatively between patients who have undergone laparoscopic TEP inguinal hernia repair performed either with telescopic dissection or balloon dissection. Specific Aim #3: To determine if there is a difference in the rate of intraoperative complications and 30-day wound events between patients who have undergone laparoscopic TEP inguinal hernia repair performed either with telescopic dissection or balloon dissection. Specific Aim #4: To determine if 1-year hernia recurrence rates differ between patients who have undergone laparoscopic TEP inguinal hernia repair performed either with telescopic dissection or balloon dissection.

Official Title
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Randomized Controlled Trial Comparing Telescopic Dissection vs. Balloon Dissection During Laparoscopic TEP Inguinal Hernia Repair

Conditions
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Inguinal Hernia

Intervention / Treatment
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* Procedure: Telescopic Dissection
* Device: Balloon Dissection


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: 18 years of age or older Able to give informed consent Unilateral inguinal hernia Scheduled for elective inguinal hernia repair Eligible to tolerate general anesthesia Eligible to undergo minimally invasive inguinal hernia repair Willing to undergo mesh-based repair Exclusion Criteria: Younger than 18 years old Unable to give informed consent Bilateral Inguinal hernias Emergent inguinal hernia repairs ( acute incarceration or strangulation) Recurrent inguinal hernia with prior preperitoneal mesh Unable to tolerate general anesthesia Not eligible for minimally invasive inguinal hernia repair Not willing to undergo mesh-based repair

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Balloon Dissection<br>Patients will undergo laparoscopic TEP inguinal hernia repair and creation of the extraperitoneal space will be performed with a balloon dissection technique using the Spacemaker Balloon Dissector. | Device: Balloon Dissection<br>* Creation of extraperitoneal space with aid of the disposable Spacemaker balloon dissector<br>* Other names: SpaceMaker Balloon Dissector;|
| Experimental: Telescopic Dissection<br>Patients will undergo laparoscopic TEP inguinal hernia repair and creation of the extraperitoneal space will be performed with a telescopic dissection technique. | Procedure: Telescopic Dissection<br>* Creation of extraperitoneal space with blunt dissection using the laparoscopic probe<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Operative Time | Total Operative time measured in minutes, from incision to end of procedure; operative times will be reported as median and interquartile range. | Measured from start to end of procedure | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| NRS-11 Pain Scores | Early postoperative pain scores; Pain scores measured with the Numeric Pain Rating Scale (NRS-11) pain score at postoperative days 1, 7 and 30. Pain ratings will be reported as median and inter-quartile range. Scores can range from 0 to 10, higher numbers represent more pain. | Postoperative day 1, Postoperative day 7 and Postoperative day 30 | 
| Number of Participants With Intra-operative Complications | Rate of any Intra-operative complications; rate will be reported in number and percent as appropriate | Intraoperative complications recorded during the procedure, up to closure of the incisions | 
| 30-day SSO (Surgical Site Occurrences) Rate | 30-day rate of Surgical Site Occurrences which includes any surgical site infection as well as wound cellulitis, non-healing incisional wound, fascial disruption, skin or soft tissue ischemia, skin or soft tissue necrosis, wound serous drainage, seroma, hematoma, or development of an enterocutaneous fistula. The rate will be reported in number and percent as appropriate | 30 days after surgery | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Balloon dissection, Telescopic dissection, Inguinal hernia, TEP