Extraperitoneal endoscopic inguinal hernia repair

Telescopic Dissection as a Cost-Effective Alternative to Balloon Trocar for Preperitoneal Dissection in Total Extraperitoneal Inguinal Hernia Repair

Background: Total extraperitoneal (TEP) approach is one of the commonly used minimally invasive method in inguinal hernia repair. There are limited data that compares the results of the telescopic dissection and balloon trocar for preperitoneal dissection. In our study, we aimed to retrospectively evaluate the TEP cases performed at our center and compare the results of these two techniques. Methods: TEP cases performed between 2020 and 2024 were evaluated. Strangulated and recurrent hernia cases were excluded. Telescopic dissection and balloon trocar techniques were compared in terms of conversion, postoperative pain, complications, and recurrence. Results: A total of 177 patients were included. Telescopic method was used in 122 cases, while a balloon trocar was used in 55 cases. The median age was 50 years (range: 20-86), and 163 patients (92%) were male. Bilateral inguinal hernia was present in 61 patients (35%). The median operative time was 100 minutes (IQR: 80-120 minutes). Conversion was required in a total of 3 cases (1.5%); specifically, the transabdominal preperitoneal method was employed in 2 cases, and Lichtenstein-style anterior approach hernia repair was performed in one case. Between the telescopic dissection and balloon trocar groups, no significant differences were observed in operation time (P = .407), conversion rates (P = .228), postoperative pain scores (P = .505, P = .264, P = .681, P = .743), complication rates (P = .205), or recurrence rates (P = .311). Conclusions: The results of using a balloon trocar and telescopic dissection in inguinal hernia repair with TEP are similar, and telescopic dissection could be a cost-effective alternative to the balloon trocar.

Transinguinal preperitoneal (TIPP) versus minimally invasive inguinal hernia repair: a systematic review and meta-analysis

PURPOSE

The transinguinal preperitoneal (TIPP) technique is an open approach to groin hernia repair with posteriorly positioned mesh supposed to reduce recurrence rates. However, transabdominal preperitoneal (TAPP) and totally extraperitoneal (TEP) techniques have similar mesh positioning with the advantages of minimally invasive surgery (MIS). Hence, we performed a systematic review and meta-analysis comparing TIPP and MIS for groin hernia repair.

SOURCE

Cochrane, Embase, Scopus, Scielo, and PubMed were systematically searched for studies comparing TIPP and MIS techniques for groin hernia repair. Outcomes assessed were recurrence, chronic pain, surgical site infection (SSI), seroma, and hematoma. We performed a subgroup analysis of TAPP and TEP techniques separately. Statistical analysis was performed with R Studio.

PRINCIPAL FINDINGS

81 studies were screened and 19 were thoroughly reviewed. Six studies were included, of which two compared TIPP with TEP technique, two compared TIPP with TAPP, and two compared TIPP with both TEP and TAPP techniques. We found lower recurrence rates for the TEP technique compared to TIPP (0.38% versus 1.19%; RR 2.68; 95% CI 1.01 to 7.11; P = 0.04). Also, we found lower seroma rates for TIPP group on the overall analysis (RR 0.21; P = 0.002). We did not find statistically significant differences regarding overall recurrence (RR 1.6; P = 0.19), chronic pain (RR 1.53; P = 0.2), SSI (RR 2.51; P = 0.47), and hematoma (RR 1.29; P = 0.76) between MIS and TIPP. No statistically significant differences were found in the subgroup analysis of TAPP technique for all the outcomes.

CONCLUSION

Our systematic review and meta-analysis found no differences between TIPP and MIS approaches in the overall analysis of recurrence, SSI, and chronic pain rates. Further research is needed to analyze individual techniques and draw a more precise conclusion on this subject.

PROSPERO REGISTRATION

ID CRD42024530107, April 8, 2024.

TEP or TAPP: who, when, and how?

Groin hernia repair is the most common procedure performed by general surgeons. The open mesh technique generally represents the main technique for an inguinal repair, but a different approach is often required. Laparoscopy was found to be the answer to minimizing the impact of the preperitoneal open techniques described by Nyhus and Stoppa. The introduction of the totally extraperitoneal hernia repair (TEP) and transabdominal preperitoneal repair (TAPP) in the early 1990s started a new chapter in groin hernia surgery. The minimally invasive techniques vs. open mesh, and then one against the other, soon became a hot topic among abdominal wall surgeons. With time, the number of procedures and indications increased and are still increasing. This review aims to provide an overview of the two main laparoscopic techniques for groin hernia repair, answering the following questions: Who should perform them? What is the learning curve required to minimize complications and optimize operative time? When is a minimally invasive approach indicated, and which one (both in elective and in emergency setting)? How are they performed? The standard techniques have been described in detail, and personal observations from an abdominal wall surgery referral center were added. The main reviews from the early 2000s up to date, which compared the techniques, were analyzed, and the results reported, confirming the comparable safety and efficacy of both these techniques.

"Fully endoscopic preperitoneal ascending suprapubic approach for minimally invasive repair of anterior and lateral abdominal wall hernias"

PURPOSE

The aim of this work is to describe the rational, feasibility and clinical and Quality-of-life improvement results of a fully endoscopic preperitoneal repair for midline and lateral abdominal wall hernias, starting from the space of Retzius in a "bottom-to-up" approach.

METHODS

An observational prospective data-collected and quality of life study is performed in selected patients with less than 10 cm. in diameter midline and lateral abdominal wall hernias. A suprapubic upward e-TEP technique from a previously dissected Retzius space, is performed in all cases. The surgical goal is to perform a total free-tension abdominal wall reconstruction followed by a prosthetic hernioplasty. Clinical Data is classified in preoperative, intraoperative, and postoperative variables, including a quality-of-life clinical evaluation based on an improvement of HerQLes score.

RESULTS

A total of 30 patients underwent this approach from September 2017 to October 2022 in a single-surgeon practice. A total restoration of the previous abdominal wall anatomy and a prosthetic repair were achieved in all cases. The mean operative time was 142.53 min, with a significant shorter time in lateral hernias approach. Minor complications (Clavien-Dindo I) were collected in 10% of the patients. Major complications (Clavien-Dindo IIIb) occurred in 6.66% of the patients. The mean pain at discharge was 1.83 VAS, with a significant lower pain in M-eTEP approach for lateral hernias. The mean hospital stay was 42.4 h. No seroma, hematoma, chronic pain, or recurrence was observed in the mean follow-up (20.33 months). A clinical and quality of life improvement was found in 92.9% of the patients, measured by a minimal clinical important difference (MCID) between preoperative and postoperative HerQLes score.

CONCLUSION

Despite being a technically demanding approach, the results obtained by this approach are compatible in safety and feasibility with other minimally invasive preperitoneal hernia repair techniques, in addition to obtaining a significant improvement in the quality of life of patients.

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

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

[Laparoscopic totally extraperitoneal repair of strangulated groin hernia]

OBJECTIVE

To study the possibility of totally extraperitoneal repair combined with diagnostic laparoscopy in the treatment of strangulated groin hernias (Laparoscopy-Assisted Totally Extraperitoneal Plasty, LATEP).

MATERIAL AND METHODS

We analyzed the results of laparoscopic totally extraperitoneal hernia repair. The trocar placement technique was modified. There were 38 patients with strangulated groin hernia. The sample included 26 patients with strangulated inguinal hernia, 9 ones with strangulated femoral hernia and 3 patients with recurrent strangulated inguinal hernia.

RESULTS

LATEP was attempted in 38 patients and successful in 37 (97.3%) cases. In 1 (2.6%) patient, correction of small bowel strangulation was failed and conversion to open surgery was required. In 29 patients (76.3%), correction of strangulation was performed after laparoscopy-assisted external manipulations and careful traction from abdominal cavity. In 8 (21%) cases, strangulation spontaneously regressed before laparoscopy. Laparoscopy confirmed viability of strangulated organs in 36 patients. One (2.6%) patient required bowel resection due to small intestine wall necrosis. Later, all patients underwent totally extraperitoneal repair. We were able to prevent the contact of hernia sac fluid with the implant in all cases. At the stage of preperitoneal repair, local damage to peritoneum occurred in 9 patients. Nevertheless, sealing was not required since hernia fluid was previously removed from abdominal cavity. There were no signs of implant infection and hernia recurrence within 6-14 months.

CONCLUSION

Totally extraperitoneal repair combined with diagnostic laparoscopy is possible for strangulated groin hernias.

Minimally Invasive Total Extraperitoneal Varicocele Repair: First Description in Children

Introduction: The aim of this study was to report the first pediatric case series treated with minimally invasive total extraperitoneal varicocele (MITEV) repair using the total extraperitoneal (TEP) approach. Materials and Methods: Five male adolescents (12-17 years) were included in this study, all with left-sided Grade III varicoceles. A 5 mm camera port was inserted just below the umbilicus and two 5 mm working ports were used, one above the symphysis in the midline and the other in the left lateral hemiabdomen just below the arcuate line. Results: Operation time ranged from 47 to 61 minutes (mean: 53 minutes). There were no intra- or postoperative complications. The peritoneum was not perforated, and the abdominal cavity was not entered. Two patients had resolution from varicoceles on follow-up clinical examination and ultrasonography was performed 6 months after surgery. In 3 patients, long-term follow-up was pending. Conclusion: MITEV repair reflects a new minimally invasive access to the retroperitoneum in children with varicocele.

Fascinating history of groin hernias: Comprehensive recognition of anatomy, classic considerations for herniorrhaphy, and current controversies in hernioplasty

Groin hernias include indirect inguinal, direct inguinal, femoral, obturator, and supravesical hernias. Here, we summarize historical turning points, anatomical recognition and surgical repairs. Groin hernias have a fascinating history in the fields of anatomy and surgery. The concept of tension-free repair is generally accepted among clinicians. Surgical repair with mesh is categorized as hernioplasty, while classic repair without mesh is considered herniorrhaphy. Although various surgical approaches have been developed, the surgical technique should be carefully chosen for each patient. Regarding as interesting history, crucial anatomy and important surgeries in the field of groin hernia, we here summarized them in detail, respectively. Points of debate are also reviewed; important points are shown using illustrations and schemas. We hope this systematic review is surgical guide for general surgeons including residents. Both a skillful technique and anatomical knowledge are indispensable for successful hernia surgery in the groin.

Total extraperitoneal (TEP) versus laparoscopic transabdominal preperitoneal (TAPP) hernioplasty: systematic review and trial sequential analysis of randomized controlled trials

Purpose

To examine the updated evidence on safety, effectiveness, and outcomes of the totally extraperitoneal (TEP) versus the laparoscopic transabdominal preperitoneal (TAPP) repair and to explore the timely tendency variations favoring one treatment over another.

Methods

Systematic review and trial sequential analysis (TSA) of randomized controlled trials (RCTs). MEDLINE, Scopus, Web of Science, Cochrane Central Library, and ClinicalTrials.gov were consulted. Risk Ratio (RR), weighted mean difference (WMD), and 95% confidence intervals (CI) were used as pooled effect size measures.

Results

Fifteen RCTs were included (1359 patients). Of these, 702 (51.6%) underwent TAPP and 657 (48.4%) TEP repair. The age of the patients ranged from 18 to 92 years and 87.9% were males. The estimated pooled RR for hernia recurrence (RR = 0.83; 95% CI 0.35–1.96) and chronic pain (RR = 1.51; 95% CI 0.54–4.22) were similar for TEP vs. TAPP. The TSA shows a cumulative z-curve without crossing the monitoring boundaries line (Z = 1.96), thus supporting true negative results while the information size was calculated as adequate for both outcomes. No significant differences were found in term of early postoperative pain, operative time, wound-related complications, hospital length of stay, return to work/daily activities, and costs.

Conclusions

TEP and TAPP repair seems comparable in terms of postoperative hernia recurrence and chronic pain. The cumulative evidence and information size are sufficient to provide a conclusive evidence on recurrence and chronic pain. Similar trials or meta-analyses seem unlikely to show diverse results and should be discouraged.

Supplementary Information

The online version contains supplementary material available at 10.1007/s10029-021-02407-7.

The learning curve of laparoscopic inguinal hernia repair: a comparison of three inexperienced surgeons

Introduction

Studies with inexperienced surgeons in terms of the learning curve for laparoscopic totally extraperitoneal (TEP) inguinal hernia repair are limited.

Aim

To compare three inexperienced surgeons in terms of the learning curve without supervision.

Material and methods

Patients’ data, which were from consecutive laparoscopic TEP hernioplasties between December 2017 and February 2020, were analysed retrospectively. The primary outcome was to compare the learning curve of three surgeons (Surgeon A, B, and C) in terms of complications, conversion, and duration of surgery. Secondary outcomes were recurrence rates.

Results

A total of 299 patients were included in the study. Conversion and intraoperative complication rates decreased after the first 60 cases (from 10% to 2.5%, p = 0.013 and from 9% to 2.5%, p = 0.027, respectively). The mean operative time reached a plateau of less than 40 min after 51–81 cases (Surgeon A 51, B 71, and C 81 cases). Ageing was a risk factor for intraoperative complications and recurrence (p < 0.001, p = 0.008, respectively), and higher body mass index (BMI) was a risk factor for conversion (p = 0.004). Age ≥ 60 years compared to age < 60 years increased intraoperative complications five-fold and recurrence six-fold (p = 0.001). On the other hand, BMI ≥ 30 kg/m² increased the possibility of conversion to open surgery nine-fold (p < 0.001). In addition, a positive correlation was found between the operative time and the BMI and VAS score (p = 0.004, p = 0.015, respectively).

Conclusions

In order to reach the plateau in the operative time during the TEP learning curve period, more than 50 cases should be experienced, whereas more than 60 cases are needed for conversion, intraoperative complications, and recurrence.

Crucial anatomy and technical cues for laparoscopic transabdominal preperitoneal repair: Advanced manipulation for groin hernias in adults

Groin hernias include indirect inguinal, direct inguinal, and femoral hernias. Obturator and supravesical hernias appear very close to the groin. High-quality repairs are required for groin hernias. The concept of "tension-free repair" is generally accepted, and surgical repairs with mesh are categorized as "hernioplasties". Surgeons should have good knowledge of the relevant anatomy. Physicians generally focus on the preperitoneal space, myopectineal orifice, topographic nerves, and regional vessels. Currently, laparoscopic surgery has therapeutic potential in the surgical setting for hernioplasty, with laparoscopic transabdominal preperitoneal (TAPP) repair appearing to be a powerful tool for use in adult hernia patients. TAPP offers the advantages of accurate diagnoses, repair of bilateral and recurrent hernias, less postoperative pain, early recovery allowing work and activities, tension-free repair of the preperitoneal (posterior) space, ability to cover obturator hernias, and avoidance of potential injury to the spermatic cord. The disadvantages of TAPP are the need for general anesthesia, adhering to a learning curve, higher cost, unexpected complications related to abdominal organs, adhesion to the mesh, unexpected injuries to vessels, prolonged operative time, and as-yet-unknown long-term outcomes. Both technical skill and anatomical familiarity are important for safe, reliable surgery. With increasing awareness of the importance of anatomy during TAPP repair, we address the skills and pitfalls during laparoscopic TAPP repair in adult patients using illustrations and schemas. We also address debatable points on this subject.

A study of contralateral occult inguinal hernia in adult male patients undergoing total extraperitoneal herniorraphy

Background:

The incidence of contralateral occult hernia (COH) varies from 4.2% to 57.5%. Total extraperitoneal (TEP) gives us opportunity to visualize contralateral groin for occult hernia and its simultaneous repair. Ultrasonography (USG) helps to diagnose occult hernia preoperatively with detection rate of 96.6% with specificity 84.4%.

Objective:

The aims of this study were to identify the incidence of contralateral occult inguinal hernia in clinically diagnosed unilateral inguinal hernia patients using USG as diagnostic modality and to compare the clinical outcomes of unilateral TEP vs. bilateral TEP with respect to pain, duration of hospital stay, time for return to normal work, and postoperative complications.

Setting and Design:

This was a prospective observational, single-center study.

Materials and Methods:

A total of 30 male patients were included in the study who was having clinically diagnosed unilateral hernia. All patients were assessed by USG for contralateral occult inguinal hernia.

Results:

Incidence of COH was 10%, two (6.7%) had indirect defect, and 1 (3.3%) had direct defect. Two (6.7%) patients underwent bilateral TEP and 28 (93.3%) underwent unilateral TEP. No significant difference was observed in terms of mean duration of hospital stay, duration of surgery, and visual analog scale score for pain in both unilateral and bilateral TEP. The mean for resuming daily work in unilateral TEP was 4.86 ± 0.833 days and in bilateral TEP the mean was 7.50 ± 0.70 days and this showed statistically significant difference (P < 0.001).

Conclusion:

Patients with COH should be counselled for synchronous repair as there is no significant difference in clinical outcomes of unilateral and bilateral TEP. On the basis of this pilot study, it can be concluded that preoperative USG is mandatory for diagnosis and simultaneous management of preexisting contralateral hernia.

Extended Totally Extraperitoneal (eTEP) Approach for Ventral Hernia Repair: Initial Results

INTRODUCTION

Since the first laparoscopic incisional hernia repair, several minimally invasive procedures have been developed in abdominal wall repair. In 2017, the extended totally extraperitoneal (eTEP) approach for abdominal wall repair was published. We present the results from eTEP implementation at two medical centers by one surgeon.

METHODS

Prospective descriptive study of the implementation of the eTEP approach, with transversus abdominis release (TAR) when needed. The surgical technique was initiated by accessing the space between the rectus abdominis muscle and posterior rectus sheath, connecting this space with the fatty preperitoneal space at the midline and the contralateral retrorectal space. Identification and dissection of the hernia sac is performed in the created cavity. Additionally, posterior component release in a TAR fashion could be done. Finally, closure of posterior plane and linea alba is completed and mesh prosthesis is deployed along the whole dissected space.

RESULTS

Forty patients underwent an eTEP procedure with 20 supraumbilical defects, 10 infraumbilical and 10 lateral hernias. Sixteen cases required a TAR technique. Mean operative time was 126minutes. Median pain reported the first postoperative day was 3 on the visual analogue scale. Median length of stay was 1 day and mean follow-up was 10 months. Only one patient developed recurrence, and two patients underwent reoperation.

CONCLUSIONS

Implementation of eTEP in abdominal wall repair is safe. Preliminary outcomes of the eTEP approach in ventral hernia repair show good pain control with less hospital stay.

Laparoscopic approaches to the retropubic space: three alternatives with anatomical considerations

INTRODUCTION

Many urogynecological and surgical laparoscopic interventions require access to the retropubic space, also known as the space of Retzius. Especially in patients with a history of previous surgery in this area or in general in the lower abdomen, the preparation may be complicated by adhesions and scar tissue. The necessity to combine several laparoscopic procedures in one surgical session may require consideration of the most appropriate way to approach the retropubic space.

MATERIAL AND METHODS

We describe and discuss three different options to access the space of Retzius via laparoscopy: the medial transperitoneal, the extraperitoneal and the lateral transperitoneal approach. For all approaches, we used one umbilical trocar and two trocars in the lower abdomen.

RESULTS

An algorithm was developed to select the most appropriate access route to the retropubic space, depending on the history of previous surgeries and accompanying interventions.

CONCLUSION

The knowledge of different access routes to the retropubic space offers the possibility of adjusting the surgical procedure to the individual constellation of the patient.

Telescopic dissection versus balloon dissection for laparoscopic totally extraperitoneal inguinal hernia repair (TEP): a registry-based randomized controlled trial

OBJECTIVE

Laparoscopic totally extraperitoneal inguinal hernia repair (TEP) can be performed using either telescopic (TD) or balloon dissection (BD). The use of a disposable balloon dissector increases the cost of TEP. However, it remains unclear whether BD saves enough time to justify its cost. We hypothesized that BD would consistently save 15 min in operative time. To test this hypothesis, we designed a registry-based randomized controlled trial (RB-RCT) embedded into the Americas Hernia Society Quality Collaborative.

METHODS

A single-blinded, parallel, RB-RCT was conducted. Adults with inguinal hernias presenting for elective repair were screened. Patients with unilateral hernias deemed fit to undergo TEP were eligible; those with bilateral hernias (BIH) or undergoing open repair were excluded. Individuals were randomized to TD or BD with a disposable device. TEP was performed with synthetic mesh and tacks. Subjects were blinded and followed up for 30 day. Main outcome was operative time.

RESULTS

207 patients were screened: 166 were excluded and 41 were randomized (21 BD, 20 TD). One patient (TD group) was excluded due to the incidental finding of BIH. 40 patients were analyzed (median age 56, median BMI 26 kg/m², 98% males). Hernias were 72% indirect, 17% direct, 10% pantaloon, and 8% recurrent. Other than obesity (26.5% vs. 0, p = 0.018), there were no baseline differences between the groups. Median operative times were similar (TD 43 min, IQR 33-63; BD 46 min, IQR 35-90, p = 0.490). There were 2 seromas and 2 hematomas in the BD group, and none in the TD (p = 0.108).

CONCLUSIONS

BD does not consistently result in 15-min time saving during TEP. Use of a disposable balloon dissector can be deferred in the experienced hands.

TRIAL REGISTRATION

ClinicalTrials.gov (NCT03276871).

Triangle Trocar Configuration in Laparoscopic Totally Extraperitoneal Inguinal Hernia Repair: A Prospective Randomized Controlled Study

BACKGROUND

In totally extraperitoneal (TEP) operation, when trocars are arranged with midline configuration, operative instruments can easily interfere with each other because of the small operative angle. The triangle trocar configuration, which creates a large operative angle, may minimize interference. Therefore, we evaluated the use of triangle trocar configuration in TEP inguinal hernia repair.

METHODS

A prospective randomized controlled study was conducted in 113 patients of laparoscopic TEP inguinal hernia repair in the Department of Hernia and Abdominal Wall Surgery, Shanghai East Hospital, between July 2016 and June 2017. Patients were randomly assigned to TEP laparoscopic inguinal hernioplasty with triangle trocar configuration (study group, n = 59) or midline trocar configuration (control group, n = 54). Perioperative outcomes (operative time, operative complications, postoperative pain, hospital stay, and costs), early postoperative complications (seroma/hematoma and uroschesis), and mid-term outcomes (late postoperative complications and recurrence) were observed and compared.

RESULTS

After a mean follow-up of 10.21 ± 2.32 mo, there was no significant difference in operative time, operative complications, postoperative pain, postoperative hospital stay, costs, postoperative complications, and recurrence rate between the two groups. The indirect hernia sac dissection time was shorter in the study group than in the control group.

CONCLUSIONS

Triangle trocar configuration in TEP laparoscopic hernia repair is safe and reliable and is an option for hernia surgeons. The technique creates a large operative angle and avoids interference between endo-instruments, which facilitates TEP and decreases the indirect hernia sac dissection time.

Primary inguinal hernia: The open repair today pros and cons

Open anterior repair for inguinal hernia offers several distinct advantages over endoscopic repair, especially when real-world effectiveness is taken into account. The learning curve for endoscopic techniques is long, whereas the Lichtenstein and other open tension-free techniques are easier to teach and replicate at all levels. The outcomes of Lichtenstein repairs for primary inguinal hernia as performed by non-experts and supervised residents are comparable to those of experts. Moreover, open tension-free repair does not require expensive instruments or dedicated equipment, other than the prosthetic mesh. As such, it is feasible in any operating room anywhere in the world with limited costs. In our opinion, the most important advantage offered by open tension-free repair is that it can be performed under local anesthesia. Nevertheless, local anesthesia has some disadvantages: it requires training, excellent knowledge of the anatomy and the necessary technique, patience, and gentle handling of the tissues. Open inguinal hernia repair is a procedure that every surgeon should know and be able to perform because it is necessary to treat two conditions, groin hernia recurrence after a posterior approach (both laparoscopic and open) and pubic inguinal pain syndrome.

The Superior Inguinal Ligament Approach of Single Incision Laparoscopic Surgery for Total Extraperitoneal Inguinal Hernia Repair

BACKGROUND

Total extraperitoneal (TEP) inguinal hernia repair gained popularity in the past two decades for its advantage, especially single incision laparoscopic surgery (SILS) for TEP inguinal hernia repair (SILS TEP), however, which is a technically demanding procedure.

METHODS

The study retrospectively analyzed 6 cases of the superior of inguinal ligament approach of S-SILS TEP repair from August 2015 to July 2016. A detailed review of medical records and the perioperative data including patient characteristics, operative details, and postoperative hospital stay was conducted.

RESULTS

S-SILS TEP repair for inguinal hernia was successfully completed for 6 patients, and the mean operation time was 59.2 minutes (range 55-70 minutes), and the mean blood loss was 7.5 mL (range 5-15 mL) and the postoperative recovery was uneventful about 3 days after operation with a single wound over inguinal ligament.

CONCLUSIONS

S-SILS TEP repair provides a new operative view, which combines the advantage of laparoscopic and open surgery, especially in surgical technique and minimal invasiveness. Our experience suggests that the S-SILS TEP repair may be a safe and feasible alternative in inguinal hernias repair.

Early assessment of bilateral inguinal hernia repair: A comparison between the laparoscopic total extraperitoneal and Stoppa approaches

BACKGROUND:

The present clinical trial was designed to compare the results of bilateral inguinal hernia repair between patients who underwent the conventional Stoppa technique and laparoscopic total extraperitoneal repair (LTE) with a single mesh and without staple fixation.

PATIENTS AND METHODS:

This controlled, randomised clinical trial was conducted at General Surgery and Trauma of the Clinics Hospital, Medical School, the University of São Paulo between September 2010 and February 2011. Totally, 50 male patients, with a bilateral inguinal hernia, older than 25 years were considered eligible for the study. The following parameters were analysed during the early post-operative period: (1) The intensity of surgical trauma, operation time, C-reactive protein (CRP) levels, white blood cell count, bleeding and pain intensity; (2) quality of life assessment; and (3) post-operative complications.

RESULTS:

LTE procedure was longer than the Stoppa procedure (134.6 min ± 38.3 vs. 90.6 min ± 41.3; P < 0.05). The levels of CRP were higher in the Stoppa group (P < 0.05) but the number of leucocytes, haematocrit, and haemoglobin were similar between the groups (P > 0.05). There was no difference in pain during the 1^st and 7^th post-operative, physical functioning, physical limitation, the impact of pain on daily activities, and the Carolinas Comfort Scale during the 7^th and 15^th post-operative (P > 0.05). Complications occurred in 88% of Stoppa group (22 patients) and 64% in LTE group (16 patients) (P < 0.05).

CONCLUSION:

The comparative study between the Stoppa and LTE approaches for the bilateral inguinal hernia repair demonstrated that: (1) The LTE approach showed less surgical trauma despite the longer operation time; (2) Quality of life during the early post-operative period were similar; and (3) Complication rates were higher in the Stoppa group.

Combined open and laparoscopic technique for extraperitoneal mesh repair of large sac inguinal hernias

BACKGROUND

Laparoscopic total extraperitoneal (TEP) hernia repair has been confirmed as an effective procedure in several studies but is considered technically demanding. Separating the hernial sac and spermatic cord is difficult when a large sac inguinal hernia is encountered. This study aimed to investigate the feasibility and effectiveness of a combined open and laparoscopic TEP repair of large sac inguinal hernias.

METHODS

From June 2012 to May 2015, laparoscopic TEP (112 cases) and combined open and laparoscopic TEP (COL-TEP) (44 cases) were performed in patients with large sac hernia. There was no clear definition of large sac inguinal hernia; therefore, we defined a large sac as one with the sac base cranial to or over outer ring that could not be easily resected laparoscopically. Using this definition, the laparoscopic TEP group was divided into a small sac TEP (SS-TEP) group (68 cases) and a large sac TEP (LS-TEP) group (44 cases). Direct hernias were included in the SS-TEP group because the hernial sac was easily dissected laparoscopically. The patient demographics, perioperative parameters, complications, and recurrence were compared between the three groups.

RESULTS

No significant differences were found between the groups in mean age, gender, body mass index, comorbidities, number of previous laparotomies, or recurrence rate. Compared with the LS-TEP group, both the SS-TEP and COL-TEP groups had a significantly lower surgical duration (51.4 ± 10.9 vs. 32.8 ± 13.1 and 36.2 ± 11.2 min, respectively), conversion rate (13.6 vs. 0 and 0 %, respectively), and total complication rate (27.3 vs. 13.2 and 11.3 %, respectively).

CONCLUSION

The combined technique was safe and effective for repair of large sac inguinal hernias. The combined technique was associated with decreased technical difficulty, surgical duration, and conversion and total complication rates.

Conversion to Stoppa procedure in laparoscopic totally extraperitoneal inguinal hernia repair

The Stoppa technique for abdominal wall hernia repair was found to be an effective rescue procedure for difficulties arising during laparoscopic totally extraperitoneal inguinal hernia repair.

Background and Objectives:

Conversion to open surgery is an important problem, especially during the learning curve of laparoscopic totally extraperitoneal (TEP) inguinal hernia repair.

Methods:

Here, we discuss conversion to the Stoppa procedure during laparoscopic TEP inguinal hernia repair. Outcomes of patients who underwent conversion to an open approach during laparoscopic TEP inguinal hernia repair between September 2004 and May 2010 were evaluated.

Results:

In total, 259 consecutive patients with 281 inguinal hernias underwent laparoscopic TEP inguinal hernia repair. Thirty-one hernia repairs (11%) were converted to open conventional surgical procedures. Twenty-eight of 31 laparoscopic TEP hernia repairs were converted to modified Stoppa procedures, because of technical difficulties. Three of these patients underwent Lichtenstein hernia repairs, because they had undergone previous surgeries.

Conclusion:

Stoppa is an easy and successful procedure used to solve problems during TEP hernia repair. The Lichtenstein procedure may be a suitable option in patients who have undergone previous operations, such as a radical prostatectomy.

Using the Prolene Hernia System (PHS) for inguinal hernia repair

OBJECTIVE

To assess immediate postoperative and late complications in patients with inguinal hernia undergoing surgical correction by Gilbert technique, using the Prolene Hernia System (HPS).

METHODS

We surveyed all patients undergoing inguinal hernia repair with PHS mesh at The Sao Lucas Hospital--PUCRS, from January 2001 to october 2006. Information was retrospectively collected through telephone calls and chart review. The protocol for data collection included epidemiological aspects, as well as immediate and late complications.

RESULTS

ninety-six patients were enrolled. We identified six (6.25%) complications in different patients, none of which resulting in death. Two patients (2.08%) had seroma; hematoma was identified in one patient (1.04%); one patient (1.04%) had wound infection. Two patients (2.08%) had scrotal edema. After a mean follow up of 49.25 months (range 16 to 86.12) two patients (2.08%) had chronic pain and one patient (1.04%) had hernia recurrence twenty-six months after surgery.

CONCLUSION

The repair of inguinal hernia with PHS is a safe, effective and reproducible method, with low complication and recurrence rates or long term symptoms.

Follow-up period of 13 years after endoscopic total extraperitoneal repair of inguinal hernias: a cohort study

BACKGROUND

Endoscopic inguinal hernia repair was introduced in the Netherlands in the early 1990s. The authors' institution was among the first to adopt this technique. In this study, long-term hernia recurrence among patients treated by the total extraperitoneal (TEP) approach for an inguinal hernia is described. A cohort study was conducted.

METHODS

Between January 1993 and December 1997, 346 TEP hernia repairs were performed for 318 patients. After a mean follow-up period of 13-years, a senior resident examined each patient. An experienced surgeon subsequently examined the patients with a diagnosis of recurrent hernia. Data were collected on an intention-to-treat basis, meaning that conversions were included in the analysis. Univariant tests were used to analyze age older than 50 years, chronic obstructive pulmonary disease, body mass index, smoking habit, hernia type, history of open hernia repair, conversion, and surgeon as potential risk factors.

RESULTS

The analysis included 191 patients (62%) with 213 hernias. Of the original 318 patients, 59 patients died, and 68 were lost to follow-up evaluation. Perioperatively, 105 lateral, 55 medial, and 53 pantalon hernias were observed. Of the 213 hernias, 176 were primary and 37 were recurrent. The overall recurrence rate was 8.9% (8.5% for primary and 10.8% for recurrent hernias). Of the total study group, 48% of the patients experienced a bilateral inguinal hernia during their lifetime. No predicting factor for recurrent hernia could be identified.

CONCLUSIONS

The current long-term results for TEP repair of primary and secondary inguinal hernia show an overall recurrence rate of 8.9%, which is slightly higher than in previous studies. The thorough examination at follow-up assessment, the learning curve effect, and the intention-to-treat-analysis may have influenced the observed recurrence rate. Also, the percentage of bilateral hernias was higher than known to date. Therefore, examination of the contralateral side should be standard procedure.

The preperitoneal loop in inguinal hernia repair following the totally extraperitoneal technique

BACKGROUND

With increasing experience in totally extraperitoneal (TEP) hernia repair, we observed an anatomical structure not described in the literature. It is a loop-like structure under the ductus deferens or ligamentum teres uteri anchored laterally and medially to the peritoneum. Relatively constant in distance to the inner inguinal ring and individual in the grade of prominence, it inhibits correct patch placement medially. To identify and describe this so-called preperitoneal loop (pl), we performed this study.

METHODS

Between February 2nd and July 15th 2006, all patients undergoing a TEP procedure at our institution in primary inguinal hernia without previous operations in the lower abdomen were included. The main topic was the prominence and distance to the inner inguinal ring of the pl and histological examinations were made.

RESULTS

A total of 219 patients (194 male, 25 female) were included, with 97 right-side, 64 left-side and 58 bilateral hernias. The pl could be shown in 206 cases (94%), the distance to the inner ring was up to 1.5 cm in 60, between 1.5 and 3.0 cm in 112, and over 3 cm in 34 cases. Anatomical examinations showed smaller blood vessels embedded in fatty tissue and surrounded by collagen fibres (standard haematoxylin eosin [HE]) and collagen connective tissue strongly filled with elastic fibres and, occasionally, nerve fibres and lymphatic capillaries (van Gieson).

CONCLUSIONS

The pl is a very constant structure that is independent of gender and hernia type and size. In most cases, it is found close to the inner inguinal ring and, therefore, has to be cut for adequate parietalisation of cord structures/ligamentum teres uteri and correct mesh placement medially. As no mesothel was found, the origin of pl might be the deeper sheet of transversalis fascia.

Bilateral laparoscopic inguinal hernia repair in patients with occult contralateral inguinal defects

BACKGROUND

A high incidence of bilateral inguinal defects found on laparoscopic evaluation during hernia repair has been reported. However, expectation of bilateral inguinal defects in patients who are diagnosed with pure unilateral hernia might be underestimated. A prospective clinical study was performed to reveal a rate of contralateral occult defects in patients who were diagnosed with unilateral inguinal hernia prior to primary laparoscopic totally extraperitoneal (TEP) repair.

METHODS

One hundred consecutive male patients with primary unilateral inguinal hernias were included in the study. Patients with known bilateral inguinal hernias as well as femoral, giant and combined hernias were excluded. All patients underwent TEP with exploration and evaluation of the contralateral groin.

RESULTS

Median follow-up was 24 (4-46) months. Median age was 48 (18-73). Mean operative time was 42.2 (18-167) min. There were 78 (78%) patients with pure unilateral hernias and 22 (22%) patients with bilateral hernias whose contralateral inguinal defect or hernia was revealed only intraoperatively. Of those, 19 (86%) had right and 3 (14%) left occult defects. Minor complications occurred in 17 (17%) patients. There were no major complications. Two patients required a 23-hour stay in the hospital for urinary retention and hypoxia. Median period of returning to normal activity was 7 (5-14) days. There were two (2%) recurrences. Median period of returning to normal activity was 6.2 days after unilateral repair and 8.4 days after bilateral TEP.

CONCLUSION

This study revealed 22% occurrence of bilateral inguinal defects in the patients who are diagnosed with pure inguinal hernia before surgery, with higher incidence for those with left inguinal hernia. It appears that routine contralateral groin exploration and evaluation during TEP is valuable. Patients with occult bilateral hernias are benefit from bilateral TEP.

The role of endoscopic extraperitoneal herniorrhaphy: where do we stand in 2005?

Inguinal hernia repair is a common surgical procedure, but the most effective surgical technique remains controversial. The evolution of laparoscopic techniques has allowed reproduction of open preperitoneal repair via an endoscopic total extraperitoneal (TEP) approach. More recently, the advent of comprehensive training in laparoscopy has allowed TEP to continue evolving as the feasibility of this approach gains recognition as a preferable technique. Once considered very difficult to learn, TEP currently is adequately taught in many surgical training programs. This report reviews the fundamentals and details various modifications that make this procedure more desirable than open procedures and other laparoscopic techniques. A resultant decrease in operative time, cost of the procedure, and morbidity to the patient is routine. In addition, the authors review their institutional experience and examine other current evidence-based data.

Treating recurrence after a totally extraperitoneal approach

BACKGROUND

One of today's most highly regarded procedures for treating inguinal hernia is the totally extraperitoneal approach (TEP), but it can on occasion lead to recurrence. This is commonly managed with an open repair, a transabdominal preperitoneal procedure (TAPP), or another TEP. We report here on our years of experience with the latter.

METHODS

The endeavor to a secondary TEP is much the same as to a primary one, but certain differences are encountered as the operation proceeds. For example, many anatomical landmarks found in a first TEP cannot be seen in a second. There can also be a diminished amount of working space, and this occasionally leads to an open conversion.

RESULTS

From September 1991 to September 2005, we repaired 1,526 hernias in 1,156 male patients, using the TEP in every case. Of these, 21 were TEPs after a previous TEP. In 3 cases, the space could not be opened, and they were converted to the open Lichtenstein. One patient had peritoneal tears that led to conversion and another had conversion because of excessive bleeding. There were no complications, no bladder or bowel injuries, no transfusions, no preperitoneal hematomas, and no fatalities. All patients were discharged the same day.

CONCLUSIONS

A secondary TEP, open repair, and TAPP are alternative solutions to the problem of recurrence after TEP. However, any TEP involves a very prolonged learning curve for general surgeons, since they must learn the anatomy as well as the procedure, both at the same time. This is doubly true for the TEP after a previous TEP.

RANDOMIZED CONTROLLED TRIAL COMPARING PROLENE HERNIA SYSTEM AND LICHTENSTEIN METHOD FOR INGUINAL HERNIA REPAIR

BACKGROUND

There are no data regarding the long-term outcomes of prolene hernia system (PHS) mesh in the published reports. The aim of the study was to compare the short-term and long-term outcomes of the PHS mesh with the Lichtenstein mesh technique.

METHODS

Sixty-four patients with inguinal hernia were randomized to undergo either a PHS or a Lichtenstein repair under local anaesthesia as a day case. Early outcome measures were duration of surgery, pain scores, analgesic requirements, time to return to work, driving and full activity. Long-term outcome measures were chronic groin pain and recurrence.

RESULTS

Mean duration of surgery in the PHS group was 36 min (SD +/- 11) versus 34 min in the Lichtenstein group (SD +/- 8; P = 0.3). There was no significant difference in analgesic requirements (P = 0.65). Overall mean pain score was 3.5/10 versus 2.5/10 (P = 0.1). Mean time to return to work was 42 versus 30 days (P = 0.3), returning to driving was 20 versus 14 days (P = 0.2) and full activity was 21 versus 22 days (P = 0.8). Chronic groin pain developed in four patients in the PHS group (12.9%) and in five patients in the Lichtenstein group (15.1%; P > 0.05). One patient developed recurrent herniation in the PHS group. The median follow up was 4.2 years (range, 4-4.6 years). Patient satisfaction was very high with both the techniques.

CONCLUSION

There is no significant difference in the early and long-term outcomes between PHS and Lichtenstein hernia repairs. The PHS technique involving preperitoneal dissection is well tolerated and easy to carry out under local anaesthesia.

Early results for new lightweight mesh in laparoscopic totally extra-peritoneal inguinal hernia repair

Prosthetic mesh reinforcement is now routine in the management of inguinal hernia but can cause considerable pain and stiffness around the groin. The aim of this study was to compare the outcome after laparoscopic TEP inguinal repair using new lightweight or traditional heavyweight mesh performed in a single unit. Between November 2004 and March 2005, 113 patients underwent laparoscopic TEP inguinal repair using either lightweight (28 g/m(2)) or heavyweight (85 g/m(2)) mesh. Follow-up data was obtained using case note review and telephone-based questionnaire in April 2005. Follow-up information was obtained for 93 (83%) out of 113 patients. There was no difference between the two groups in the incidence of pain/discomfort at mean 3-month follow-up (45 vs 41%, Mann-Whitney U, P=0.641). However, there was a significant inverse correlation between the length of time since operation and severity of pain/discomfort in the lightweight group (P=0.001, Pearson test), suggesting a faster speed of recovery with lightweight mesh. Laparoscopic TEP inguinal hernia repair with lightweight mesh yields promising early results. Whilst there was no significant difference in pain or recurrence in the short term, post-operative pain scores improved earlier in patients with lightweight mesh compared to heavyweight mesh. This merits further study, with larger cohorts and longer follow-up, to determine the benefits of lightweight mesh.

[Laparoscopy under local anaesthesia and hypnoanaesthesia about 35 cholecystectomies and 15 inguinal hernia repair]

OBJECTIVE

To present hypnosedation and the feasibility of this technique performed for laparoscopic procedure.

STUDY DESIGN

Retrospective and descriptive study of feasibility.

PATIENTS AND METHODS

Hypnosis can significantly reduce intraoperative requirements of intravenous sedation for surgery under local anaesthesia. Modifications of surgical procedure: laparoscopic surgery under local anaesthesia and hypnosis is performed using a subcutaneous lifting of anterior abdominal wall. Insufflation is only use to push out smoke. If patient or surgical uncomfort happens, moral contract with patient includes convert to general anaesthesia.

RESULTS

We performed 35 cholecystectomies; 13 needed convert to general anaesthesia, mainly for peritoneal pain induced by CO(2) insufflation; 22 procedures were completed with patients' satisfaction. Upon 15-hernia repairs, only one patient needed convert to general anaesthesia, for dissection difficulty.

CONCLUSION

Probably hypnosis can't be extent to intraperitoneal laparoscopic procedures. On the other hand interest of hypnosis performed for extraperitoneal laparoscopic hernia repair must be explore.

Outpatient Endoscopic Totally Extraperitoneal Inguinal Hernioplasty

BACKGROUND

Endoscopic totally extraperitoneal inguinal hernioplasty (TEP) has become an established treatment for the repair of inguinal hernia but its application as an outpatient procedure has not been widely adopted. The present study was undertaken to audit the outcomes of outpatient TEP.

PATIENTS AND METHODS

From March 2001 to May 2003, 102 consecutive patients with 114 inguinal hernias underwent outpatient TEP. The mean age of the study population was 55 years with a male to female ratio of 100:2. Perioperative details and postoperative outcomes were prospectively evaluated and analyzed.

RESULTS

All TEP were successfully performed. Ninety-nine patients (97%) were discharged uneventfully on the day of operation. Three patients were admitted because of ECG changes (n = 2) and dizziness (n = 1). A single patient was readmitted on postoperative day (POD) 1 because of wound pain and vomiting. All these patients recovered uneventfully. One-third of the patients did not require any analgesia during the postoperative period. Postoperative morbidity included asymptomatic seroma (n = 12), mild scrotal bruising (n = 2), and fever (n = 1). These morbidities resolved spontaneously without the need for surgical intervention. Ninety-five patients (93%) resumed normal outdoor activities within one week.

CONCLUSIONS

Outpatient TEP was safe and effective with a success rate of 97%. Postoperative pain was mild and more than 90% of the patients resumed normal outdoor activities within a week. Outpatient TEP may emerge to become the preferred method for the management of inguinal hernia.

Simultaneous adenomectomy and preperitoneal repair of inguinal hernias by a single incision with the application of polypropylene mesh

Preperitoneal inguinal herniorraphy in conjuction with other pelvic procedures has been described in the literature, but it has not gained wide popularity mainly due to the high recurrence rate. Recently, there has been a resurgence of interest in the preperitoneal repair of inguinal hernias with the application of mesh on the deficiency of the inguinal wall using the method commonly known as the Stoppa procedure. We evaluated the results and complications of 22 patients who underwent open surgical prostatectomy (adenomectomy) and simultaneous preperitoneal application of polypropylene mesh. Nineteen (86.4%) patients suffered from unilateral inguinal hernia whereas the remaining 3 (13.6%) had bilateral protrusions. Primary hernias only and not recurrences were included in our series. The median clinical follow-up was 20.4 months (range 9-50 months). The hernioplasty itself prolonged the whole procedure for only a few minutes and it did not affect the patients' hospitalization time (mean 6.7 days). Wound infection with subsequent development of cutaneous fistula occurred in one patient (4.5%) and treated conservatively. During follow-up one recurrence (4.5%) at the side of the previous repair of the left inguinal hernia was recorded; the protrusion was insignificant and left untreated. In all but one patient (21/22, 95.5%), the surgical results were excellent. In our experience, simultaneous transvesical adenomectomy and mesh preperitoneal hernioplasty is a convenient and safe procedure which can easily be performed by urologists in just a few minutes. The procedure which is both cost and time effective for the surgeon, achieves long-lasting beneficial results for the vast majority of patients.

Laparoscopic extraperitoneal inguinal hernia repair versus open mesh repair: a prospective randomized controlled trial

BACKGROUND

This study was designed to compare an open tension-free technique (Lichtenstein repair) with a laparoscopic totally extraperitoneal hernia repair (TEP).

METHODS

One hundred sixty-eight men aged 30 to 65 years with primary or recurrent inguinal hernia were randomized to TEP or open mesh technique in the manner of Lichtenstein. Follow-up was after 1 and 6 weeks, and 1 year.

RESULTS

Eighty-one patients were randomized to TEP, and 87 to open repair. For 1 patient in each group, the operation was converted to a different type of repair. No difference was seen in overall complications between the 2 groups. However, 1 patient in the TEP group underwent operation for small bowel obstruction after surgery. A higher frequency of postoperative hematomas was seen in the open group (P <.05). Patients in the TEP group consumed less analgesic after surgery (P <.001), returned to work earlier (P <.01), and had a shorter time to full recovery (P <.01). Two recurrences occurred in the TEP group 1 year after surgery.

CONCLUSION

The TEP technique was associated with less postoperative pain, a shorter time to full recovery, and an earlier return to work compared with the open tension-free repair. No difference was seen in overall complications. However, 2 recurrences did occur after 1 year in the TEP group.

Carbon dioxide absorption during extraperitoneal and transperitoneal endoscopic hernioplasty

Transabdominal preperitoneal (TAPP) or total extraperitoneal (TEP) hernioplasty are probably associated with differing degrees of CO(2) absorption which can influence anesthetic management and perioperative morbidity. We studied 20 patients with either TAPP or TEP for perioperative CO(2) absorption (calculated from CO(2) elimination and metabolic CO(2) production) and ventilatory changes required to maintain normocapnia (blood gas analyses). CO(2) absorption reached plateau values in the TAPP group, but increased over time in the TEP group. Median CO(2) absorption during insufflation was 61 mL/min (range 43-78) for TAPP and 114 mL/min (range 75-178) for TEP, with a maximum of 114 mL/min (range 75-178) for TAPP and 258 mL/min (range 112-585) for TEP. Median minute ventilation (V(E)) required for maintaining normocapnia was 9. 5 L/min (range 7.7-11.5) for TAPP and 12.9 L/min (range 9.0-22.6) for TEP (P: < 0.01). Seven patients in the TEP group required over 18 L/min V(E), although no patient in the TAPP group required more than 14 L/min V(E). All patients in the TEP group had significant subcutaneous emphysema resulting in one case of delayed tracheal extubation. We conclude that CO(2) absorption is consistently less with TAPP.

IMPLICATIONS

The greater magnitude of carbon dioxide absorption during total extraperitoneal hernioplasty puts an additional load on the lungs and could pose a risk for patients with chronic lung disease who might be unable to eliminate excess carbon dioxide.

Carbon dioxide absorption during extraperitoneal and transperitoneal endoscopic hernioplasty

Transabdominal preperitoneal (TAPP) or total extraperitoneal (TEP) hernioplasty are probably associated with differing degrees of CO(2) absorption which can influence anesthetic management and perioperative morbidity. We studied 20 patients with either TAPP or TEP for perioperative CO(2) absorption (calculated from CO(2) elimination and metabolic CO(2) production) and ventilatory changes required to maintain normocapnia (blood gas analyses). CO(2) absorption reached plateau values in the TAPP group, but increased over time in the TEP group. Median CO(2) absorption during insufflation was 61 mL/min (range 43-78) for TAPP and 114 mL/min (range 75-178) for TEP, with a maximum of 114 mL/min (range 75-178) for TAPP and 258 mL/min (range 112-585) for TEP. Median minute ventilation (V(E)) required for maintaining normocapnia was 9. 5 L/min (range 7.7-11.5) for TAPP and 12.9 L/min (range 9.0-22.6) for TEP (P: < 0.01). Seven patients in the TEP group required over 18 L/min V(E), although no patient in the TAPP group required more than 14 L/min V(E). All patients in the TEP group had significant subcutaneous emphysema resulting in one case of delayed tracheal extubation. We conclude that CO(2) absorption is consistently less with TAPP.

IMPLICATIONS

The greater magnitude of carbon dioxide absorption during total extraperitoneal hernioplasty puts an additional load on the lungs and could pose a risk for patients with chronic lung disease who might be unable to eliminate excess carbon dioxide.

Transversalis fascia: historical aspects and its place in contemporary inguinal herniorrhaphy

Since the introduction of the term "fascia transversalis" by Sir Ashley Cooper in 1840, this thin layer of tissue has been discovered, denied, and redefined. The transversalis fascia was originally described as a bilaminar membrane. Although most subsequent descriptions do not reflect this analysis, some authors, especially in the surgical literature, believe that a posterior lamina of the transversalis fascia exists. Others believe that the posterior lamina of the transversalis fascia is, in fact, part of the preperitoneal fascia. The usefulness of the transversalis fascia and its derivatives or analogues; e.g., the crura of the deep inguinal ring, have also been extensively discussed. The aim of this paper is to provide a brief survey of the historical literature concerning the transversalis fascia and a discussion of some of the contemporary views on its morphology and significance in current laparoscopic hernia repair.

Prospective randomized study of stapled versus unstapled mesh in a laparoscopic preperitoneal inguinal hernia repair

BACKGROUND

In 1975, researchers introduced the use of a large unsutured polyester mesh prosthesis placed in the preperitoneal space for inguinal hernia repair. Different stapling devices have been used to secure this mesh, and the most common complication of the procedure is nerve damage secondary to the staples. The necessity of stapling has never been demonstrated. We designed a prospective randomized study of the need for stapling in laparoscopic extraperitoneal repair of inguinal hernias with 1-year and 3-year followup.

STUDY DESIGN

Inclusion criteria of the study were men older than 18 years and first-time inguinal hernia repair. Patients with recurrence and previous abdominal operations were excluded to avoid confounding variables. Each patient's hernia was assigned a consecutive random number chosen by computer, with each number corresponding to an assigned group. The first group had stapled mesh and the second had unstapled mesh.

RESULTS

Data were collected over a 15-month period, with each procedure having a mean followup time of 8 months. A total of 100 procedures was performed in 92 patients. The two groups of patients were well matched for age and the type of hernia repaired. There were no recurrences in either group and no complications or deaths.

CONCLUSIONS

The initial 12-month followup showed no significant differences in recurrence or complication rates between the stapled and unstapled groups. Both groups returned to work within an average of 4 days. A net savings of $120 was realized for each hernia repair performed without stapled mesh. In addition, stapling presents an inherent risk of nerve damage.

Laparoscopic preperitoneal repair of recurrent inguinal hernias

Repair of recurrent inguinal hernias using the conventional open technique has been associated with high rates of recurrence and complications. Stoppa has reported a low recurrence rate using the open preperitoneal approach. Evolution of laparoscopic techniques has allowed the reproduction of the open preperitoneal repair via an endoscopic totally extraperitoneal (TEP) approach. This study reviewed all the recurrent inguinal hernias repaired laparoscopically and evaluated the complication and recurrence rate. A total of 512 inguinal hernias were treated laparoscopically using the TEP approach. Of these, 75 were recurrent. The ages of the 61 men ranged from 36 to 65 years. There were 41 direct and 34 indirect hernias. Fourteen were bilateral. None of the repairs was converted to an open procedure. The operating time ranged from 20 to 145 min (median 42 min). All patients were discharged home on the same day. There were no deaths. The complications consisted of two instances of urinary retention and one groin collection. Patient follow-up ranged from 6 to 72 (median 40) months, and there have been no recurrences to date. The TEP repair for recurrent inguinal hernias can produce results comparable to the open preperitoneal technique with low morbidity and recurrence rates.