Efficacy and safety of a novel partially absorbable mesh in totally extraperitoneal hernia repair

Postoperative Outcomes and Recurrence Rate in Laparoscopic Tep Inguinal Hernia Repairs Using Partially Absorbable Meshes: A Retrospective Single-Surgeon Study Over a 5-Year Period

Objectives

This study aimed to evaluate the postoperative outcomes and recurrence rate in laparoscopic inguinal hernia repairs performed over a 5-year period with totally extraperitoneal (TEP) technique and use of partially absorbable meshes.

Methods

A total of 100 patients (mean (SD, min-max) age: 51.0 (14.6, 16-83) years, 91.0% were males) who underwent 150 laparoscopic TEP inguinal hernia repairs (bilateral in 50 patients) with use of the partially absorbable mesh were retrospectively reviewed. Data on patient demographics, hernia characteristics (side, subtype), date of operation, operating time, early and late postoperative complications as well as the recurrence rate were recorded over a 5-year period.

Results

The inguinal hernia was bilateral in 50 (50.0%) patients and indirect hernia was noted in 53 (53.0%) patients, while lipoma was evident in 17 (17.0%) cases. Median operating time was 45.0 min (range, 23.0 to 140.0 min). Overall, seroma occurred in 6 (6.0%) patients and was treated conservatively, while none of patients developed preperitoneal hematoma, infection or persistent chronic inguinal pain. Recurrence rate was 0.67% (1/150 operations) within a median 30.0 months (range, 2 to 60 months) of postoperative follow-up. Bilateral hernia was associated with significantly longer operating time compared to left or right unilateral hernia (median (min-max) 50.0 (34.0-140.0) vs. 40.0 (23-80) and 40.0 (25.0-130.0) min, p<0.01 and p<0.001, respectively). Operating time was positively correlated both with patient age (r=0.240, p=0.017) and BMI (r=0.205, p=0.044).

Conclusion

In conclusion, our findings indicate that laparoscopic TEP inguinal hernia repair with use of the partially absorbable meshes enables a favorable postoperative outcome with minimal early and late postoperative complications and 0.67% recurrence rate over a 5-year period.

Surface treatment of artificial implants with hybrid nanolayers: results of antibacterial tests, leachates and scanning electron microscope analysis

Purpose

The aim of this study was to evaluate the antibacterial efficacy of surface-treated hernia implants modified by a hybrid nanolayer with incorporated Ag, Cu, and Zn cations using the sol-gel method.

Methods

The materials (polypropylene, polyester, and polyvinylidene difluoride) were activated by vacuum plasma treatment or UV C radiation, then modified and tested for bacterial strains of Escherichia coli (gram-negative) and Staphylococcus aureus (gram-positive). The AATCC 100 (2019) method for quantitative and the ISO 20645 agar plate propagation method for qualitative evaluation of microbiological efficacy were used. The gradual release of incorporated ions was monitored over time in simulated body fluids (blood plasma, peritoneal fluid) and physiological saline using an inductively coupled plasma mass spectrometer. The thickness and the homogeneity of the layers were measured for individual random samples with scanning electron microscope analysis (SEMA) and evaluated with an elemental analysis.

Results

Qualitative and quantitative microbiological tests clearly show the great suitability of vacuum plasma and UV C with sol AD30 (dilution 1:1) surface treatment of the implants. The absolute concentration of Ag, Cu, and Zn cations in leachates was very low. SEMA showed a high degree of homogeneity of the layer and only very rare nanocracks by all tested materials appear after mechanical stress.

Conclusion

This study confirms that surface treatment of meshes using the sol-gel method significantly increases the antibacterial properties. The nanolayers are sufficiently mechanically resistant and stable and pose no threat to health.

Retroperitoneal totally endoscopic prosthetic repair of lumbar hernia

Lumbar hernia is a rare lateral abdominal wall hernia. Various surgical repair strategies have been recorded, but there is currently no unified standard. A Chinese surgeon recently revealed a novel technique for treating primary lumbar hernia called retroperitoneal totally endoscopic prosthetic repair (R-TEP). We have made a further exploration of this method and successfully used it in the treatment of secondary lumbar hernia. We successfully performed R-TEP on three patients with lumbar hernias. All patients were female with an average age of 64 years (51-71 years). Two patients each had a primary upper lumbar hernia, while one patient had a secondary lumbar hernia. With a mean operative time of 77 min (60-105 min), all operations were performed successfully. The average visual analogue scale (VAS) was 1.3 points (1-2 points) on the second day following surgery. The mean postoperative hospital stay was 2.3 days (2-3 days). No postoperative complications occurred. During a mean follow-up period of 19 months (10-24 months), there was no recurrence of the hernia, chronic pain or mesh infection. Therefore, R-TEP is safe and effective for both primary and secondary lumbar hernia. Anti-adhesive coated meshes are not required, making this a cost-effective procedure that is worthy of recommendation.