METHOD: A panel of 13 hernia experts participated in the consensus discussion and manuscript development. A comprehensive literature review was conducted using PubMed, Embase, and Google Scholar to identify relevant articles and formulate statements. Consensus was assessed using a modified three-step Delphi method, with an acceptance level of > 80%.
RESULTS: In phase 1 of consensus development, 11 statements were reviewed, with 9 reaching consensus and 1 facing disagreement. Five additional statements were introduced based on expert input. Phase 2 reviewed all 16 statements, with one failing to reach consensus. In phase 3, an online reassessment of the revised version of the failed statement in the previous round was conducted via Microsoft Forms, leading to consensus on all 16 statements.
CONCLUSION: SFM offers significant advantages over conventional sutured meshes in IH repair. However, further research and multicenter trials are recommended to refine surgical protocols. Based on expert recommendations, SFM may be preferred in IH repair, and structured training can enhance its adoption, improving patient outcomes.
MATERIALS AND METHODS: Acellular meshes were engineered using liquid collagen. They underwent in vitro, mechanical and bench testing by surgeons. Sixty-nine male New Zealand rabbits were used to refine the design. The final prototype based on the TissueSpan patented technology was then implanted again in a 2 cm long urethral defect in 9 rabbits and in a 4 cm long defect in 6 dogs.
RESULTS: The TissueSpan technology platform allows for the manufacturing of tubular and rectangular meshes in different diameters and thicknesses. The tubular mesh acted as physical conduit to gap the urethral defect with a patent urethra demonstrated after 1month in both animal models. The mesh was absorbed within 1-3months. Spontaneous urothelial coverage of the mesh and smooth muscle cell migration into the surgical area was demonstrated even in a 4 cm long urethral defect. A first in man clinical trial was subsequently initiated.
CONCLUSION: The acellular mesh may have the potential to be an off-the-shelf product for substitution urethroplasty. Its mechanical properties allow surgeons to easily create a physical conduit while its material properties favor tissue remodeling. A large-scale clinical trial is still required to further confirm the safety, performance, and patient benefit of this new medical device.
MATERIALS AND METHODS: Eighteen wistar rats were made into incisional hernia models and divided into three groups of FOP, FOP-PPM, and CM at the 14th day. After each group underwent hernia repair, abdominal wall samples were taken to examine the expression of qPCR VEGF, COL3A1, COL1A1, and COL1A2 at the 21st day.
RESULTS: There were no significant different in the gene expression of VEGF, COL3A1, COL1A1, COL1A2 and COL1A1/COL3A1 ratio between FOP, FOP-PPM and CM group (p-value >0.05). In addition, non-significant result also found at the comparative analysis between FOP-PPM and MC groups.
CONCLUSIONS: FOP can give the similar result as CM for defect closure surgery in incisional hernia, either when combined with PPM or as a single option. However, further clinical study is needed to support this animal study.
PURPOSE: The purpose of this simulation study was to establish a reference percentage value that can be used to effectively reduce the size and polygons of the 3D mesh without drastically affecting the dimensions of the prosthesis itself.
MATERIAL AND METHODS: Fifteen different maxillary palatal defects were simulated on a dental cast and scanned to create 3D casts. Digital bulbs were fabricated from the casts. Conventional bulbs for the defects were fabricated, scanned, and compared with the digital bulb to serve as a control. The polygon parameters of digital bulbs were then reduced by different percentages (75%, 50%, 25%, 10%, 5%, and 1% of the original mesh) which created a total of 105 meshes across 7 mesh groups. The reduced mesh files were compared individually with the original design in an open-source point cloud comparison software program. The parameters of comparison used in this study were Hausdorff distance (HD), Dice similarity coefficient (DSC), and volume.
RESULTS: The reduction in file size was directly proportional to the amount of mesh reduction. There were minute yet insignificant differences in volume (P>.05) across all mesh groups, with significant differences (Pmesh) was effectively carried out on simulated casts without substantially affecting the amount of similarity in volume and geometry.
MATERIALS AND METHODS: An auricular prosthesis, a complete denture, and anterior and posterior crowns were constructed using conventional methods and laser scanned to create computerized 3D meshes. The meshes were optimized independently by four computer-aided design software (Meshmixer, Meshlab, Blender, and SculptGL) to 100%, 90%, 75%, 50%, and 25% levels of original file size. Upon optimization, the following parameters were virtually evaluated and compared; mesh vertices, file size, mesh surface area (SA), mesh volume (V), interpoint discrepancies (geometric similarity based on virtual point overlapping), and spatial similarity (volumetric similarity based on shape overlapping). The influence of software and optimization on surface area and volume of each prosthesis was evaluated independently using multiple linear regression.
RESULTS: There were clear observable differences in vertices, file size, surface area, and volume. The choice of software significantly influenced the overall virtual parameters of auricular prosthesis [SA: F(4,15) = 12.93, R2 = 0.67, p < 0.001. V: F(4,15) = 9.33, R2 = 0.64, p < 0.001] and complete denture [SA: F(4,15) = 10.81, R2 = 0.67, p < 0.001. V: F(4,15) = 3.50, R2 = 0.34, p = 0.030] across optimization levels. Interpoint discrepancies were however limited to <0.1mm and volumetric similarity was >97%.
CONCLUSION: Open-source mesh optimization of smaller dental prostheses in this study produced minimal loss of geometric and volumetric details. SculptGL models were most influenced by the amount of optimization performed.
STUDY DESIGN: The study is a prospective observational study which included 122 patients who had symptomatic POP stage III and IV. AvaultaPlus™ (collagen coated, CC group) was compared to Perigee™ (non collagen coated, NC group). Introital ultrasound morphology, measure of neovascularization by color Doppler and clinical outcomes were assessed. Student t test was used for comparison of pre- and post-operation continuous data (p value of <0.05).
RESULTS: A total of 110 (CC group=50, NC group=60) women completed the study. A woman in the CC group developed ureteral injury. Both groups had comparable morphologic and clinical outcomes however, the onset of changes in mesh thickness and neovascularization occurred earlier in the NC group (1 month) compared to the CC group (6 months to 1 year).
CONCLUSION: CC group was comparable to the NC group in terms of erosion rate, ultrasound and clinical assessment. Collagen coating may induce delayed inflammatory response however may also delay tissue integration. The onset of changes in mesh thickness and neovascularization may give us an insight toward utilization of collagen coated mesh for host-tissue integration.
CASE REPORT: A series of three patients who developed recurrent pelvic organ prolapse more than 9 years after sacrocolpopexy. A 50-year-old and two 77-year-old patients who presented with recurrent pelvic organ prolapse at 9, 15 and 17 years, respectively after the primary abdominal sacrocolpopexy were managed by transvaginal mesh surgery.
CONCLUSION: Management of recurrent pelvic organ prolapse using transvaginal mesh would be an option for patients treated previously by sacrocolpopexy.
MATERIALS AND METHODS: The charts of 796 women who underwent pelvic organ prolapse (POP) surgery from July 2006 to January 2012 in Chang Gung Memorial Hospitals were reviewed. We included women who presented with advanced cuff eversion and treated with TVM surgery. Data were analysed after three years post-surgery. Descriptive statistics were used for demographic and perioperative data. The paired-samples t test was used for comparison of preoperative and postoperative continuous data. The outcomes measured were objective cure (POP-Q stage ≤ 1) and subjective cure (negative response to question 2 and 3 on POPDI-6).
RESULTS: A total of 97 patients was analysed. 61 patients had TVM-A and 36 patients had TVM-AP insertion. Mean follow-up was 52 months. The objective cure rate for TVM-AP was significantly higher than TVM-A, 94.4% versus 80.3%. TVM-AP also showed a higher subjective cure rate (91.7%) though there was no significant difference from TVM-A (p = 0.260). The mesh extrusion rate was low at 3.1% with no major complications seen. In TVM-A the blood loss was lesser and the operation time was shorter.
CONCLUSION: TVM-AP showed better objective cure rate than TVM-A at 52 months. However, TVM-A is less invasive in comparison with an acceptably good cure rates.
METHODS: A retrospective review was conducted on 99 women who underwent Surelift System surgery for advanced POP Stage III and IV between July 2018 to January 2020. Objective evaluation included Pelvic Organ Prolapse Quantification (POP-Q), multichannel urodynamic (UDS), and introital 2D ultrasonographic measurement. Subjective evaluation uses validated questionnaires of Incontinence Impact Questionnaire-7(IIQ-7), Urogenital Distress Inventory-6(UDI-6), Pelvic Organ Prolapse Distress Inventory 6(POPDI-6), Colorectal Anal Distress Inventory-8(CRADI-8) and Pelvic organ prolapse/ Urinary Incontinence Sexual Questionnaire (PISQ-12). Outcomes were examined at 3 months, yearly and at 3 years postoperative. Secondary outcome included de novo or persistent urodynamic stress incontinence (USI) and surgical complications.
RESULTS: Eighty-five women were included in the final analysis. At 3 years postoperative, the objective cure rate was 94.1 % and subjective cure rate of 91.8 %. Ultrasonography revealed initial mesh elongation and thickening at first year, resolving by the third year, while the distance between the bladder neck and mesh remained stable. Significant improvement in POP-Q components (Aa,Ba,C,Ap,Bp and TVL of p mesh exposure requiring excision in 4.7 % of patients, and one intraoperative bladder injury corrected promptly.
CONCLUSION: The Surelift System TVM demonstrates safety and efficacy in treating advanced anterior-apical POP, achieving high cure rates, secured mesh placement, and minimal complications at 3 years post-operative.