Displaying publications 1 - 20 of 41 in total

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  1. Lo TS, Tan YL, Khanuengkitkong S, Dass AK, Cortes EF, Wu PY
    J Minim Invasive Gynecol, 2014 Sep-Oct;21(5):753-61.
    PMID: 24607796 DOI: 10.1016/j.jmig.2014.02.013
    STUDY OBJECTIVE: To assess the morphologic features of anterior armed transobturator collagen-coated polypropylene mesh and its clinical outcomes in pelvic reconstructive surgery to treat pelvic organ prolapse.
    DESIGN: Evidence obtained from several timed series with intervention (Canadian Task Force classification II-3).
    SETTING: Chang Gung Memorial Hospital, Taoyuan, Taiwan, China.
    PATIENTS: Between April 2010 and October 2012, 70 patients underwent surgery to treat symptomatic pelvic organ prolapse, stage III/IV according to the POP-Q (Pelvic Organ Quantification System).
    INTERVENTION: Anterior armed transobturator collagen-coated mesh.
    MEASUREMENT AND MAIN RESULTS: Morphologic findings and clinical outcome were measured. Morphologic features were assessed via 2-dimensional introital ultrasonography and Doppler studies. Clinical outcome was measured via subjective and objective outcome. Objective outcome was assessed via the 9-point site-specific staging method of the International Continence Society Pelvic Organ Prolapse Quantification before the operation and at 1-year postoperative follow-up. Subjective outcome was based on 4 validated questionnaires: the 6-item UDI-6 (Urogenital Distress Inventory), the 7-item IIQ-7 (Incontinence Impact Questionnaire), the 6-item POPDI-6 (Pelvic Organ Prolapse Distress Inventory 6), and the 12-item PISQ-12 (Pelvic Organ Prolapse/Urinary Incontinence Sexual Questionnaire), at baseline and at 12 months after the operation. Data were obtained for 65 patients who underwent the combined surgery and were able to comply with follow-up for >1 year. Ultrasound studies reveal that mesh length tends to shorten and decrease in thickness over the 1-year follow-up. Vagina thickness also was reduced. Neovascularization through the mesh was observed in <8.5% of patients in the first month and at 1 year, and was evident in approximately 83%. The mesh exposure rate was 6.4%. The recorded objective cure was 90.8% (59 of 65 patients), and subjective cure was 89.2% (58 of 65 patients) at mean (SD) follow-up of 19.40 (10.98) months. At 2 years, UDI-6, IIQ-7, and POPDI-6 scores were all significantly decreased (p < .001), whereas the PISQ-12 score was significantly increased (p = .01).
    CONCLUSIONS: Ultrasound features suggest that the degeneration of collagen barrier may be longer than expected and that integration of collagen-coated mesh could occur up to 1 year. A substantially good clinical outcome was noted.
    KEYWORDS: Anterior vaginal mesh; Collagen-coated mesh; Morphology; Outcome; Pelvic organ prolapse
    Matched MeSH terms: Surgical Mesh*
  2. Vaiyapuri GR, Han HC, Lee LC, Tseng LA, Wong HF
    Int Urogynecol J, 2011 Jul;22(7):869-77.
    PMID: 21479713 DOI: 10.1007/s00192-011-1400-9
    INTRODUCTION AND HYPOTHESIS: This retrospective study reports the 1-year outcome in women who underwent mesh-augmented Prolift surgery performed from 2006 to 2008. There were a total of 254 patients, with 128, 106 and 20 patients receiving total, anterior and posterior Prolift, respectively.

    METHODS: Incidence of thigh pain was lower in 2008 compared to 2006 and 2007 (p < 0.0001). The percentage of patients requiring blood transfusions (p = 0.09), duration of IDC ≥ 7 days (p = 0.27), wound dehiscence and re-operation rate were lower in 2008 in contrast to 2006 and 2007 (p = 0.43). Only 209 patients (82.3%) were available for review at 1 year. There were two (1.0%) cases of recurrent vault prolapse.

    RESULTS: The subjective and objective cure rates at 1 year after this mesh implant surgery in 2006, 2007 and 2008 were 92.1% and 92.1%; 97.0% and 92.4% and 100% and 97%, respectively. The mesh erosion rate was remarkably lower in 2008 as compared to 2007 and 2006 (p < 0.001).

    CONCLUSIONS: This synthetic mesh-augmented implant surgery is effective and safe, and surgical outcome appears related to the learning curve of the surgeon.

    Matched MeSH terms: Surgical Mesh*
  3. Siow SL, Tee SC, Wong CM
    J Med Case Rep, 2015;9:49.
    PMID: 25890166 DOI: 10.1186/s13256-015-0519-6
    Paraesophageal hernia with intrathoracic mesentericoaxial type of gastric volvulus is a rare clinical entity. The rotation occurs because of the idiopathic relaxation of the gastric ligaments and ascent of the stomach adjacent to the oesophagus through the hiatus defect, while the gastroesophageal junction remains in the abdomen. The open approach remains the gold standard therapy for most patients. Here we report the case of a patient with such a condition who underwent a successful laparoscopic surgery. A literature search revealed that this is the first case report from Southeast Asia.
    Matched MeSH terms: Surgical Mesh
  4. Lo TS, Lin YH, Yusoff FM, Chu HC, Hsieh WC, Uy-Patrimonio MC
    Sci Rep, 2016 12 19;6:38960.
    PMID: 27991501 DOI: 10.1038/srep38960
    Our aim is to study the inflammatory response towards the collagen-coated and non-coated polypropylene meshes in rats and the urodynamic investigation post-operatively. Forty-two female Sprague Dawley were divided into 7 groups of 6 rats; Control, Day 7 and 30 for Sham, Avaulta Plus (MPC), Perigee (MP). UDS were taken at days 7 and 30. Mesh with the vagina and bladder wall was removed and sent for immunohistochemical examination. Results showed intense inflammatory reaction on day 7 in the study groups which decreased on day 30. IL-1, TNF-α, MMP-2 and CD31 were observed to decrease from day 7 to day 30. NGF was almost normal on day 30 in all groups. UDS showed no difference in voiding pressure. Both Study and Sham groups had shorter voiding interval (VI) on day 7 but significantly lower in MPC. VI had significantly increased on day 30 in all groups. Voided volume was significantly lower in the mesh groups even when an increase was seen on day 30. In conclusion, the higher levels of IL-1, TNF-α and MMP-2 in collagen-coated polypropylene mesh imply greater inflammation than the non-coated polypropylene mesh. Mesh implantation can lead to shorter voiding interval and smaller bladder capacity.
    Matched MeSH terms: Surgical Mesh*
  5. Lo TS, Ibrahim R, Karim NB, Nawawi EA, Uy-Patrimonio MC
    Taiwan J Obstet Gynecol, 2018 Apr;57(2):311-314.
    PMID: 29673679 DOI: 10.1016/j.tjog.2018.02.023
    OBJECTIVE: To evaluate the outcome of transvaginal mesh surgery as a management of recurrent pelvic organ prolapse, in patients previously treated with sacrocolpopexy.

    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.

    Matched MeSH terms: Surgical Mesh*
  6. Lo TS, Al-Kharabsheh AM, Tan YL, Pue LB, Hsieh WC, Uy-Patrimonio MC
    Taiwan J Obstet Gynecol, 2017 Dec;56(6):793-800.
    PMID: 29241922 DOI: 10.1016/j.tjog.2017.10.016
    OBJECTIVE: To compare the clinical efficacy, recurrence, complications and quality of life changes 3 years after Elevate-A/single incision mesh surgery anterior apical (SIM A) and sacrospinous ligament fixation (SSF) in the management of pelvic organ prolapse (POP).

    MATERIALS AND METHODS: A prospective cohort study, 139 women, underwent transvaginal surgery for anterior and/or apical POP > stage 2, 69 patients had SIM A and 70 patients had SSF. The objective cure was defined as POP ≤ stage 1 anterior, apical according to POP-Q. Subjective cure is patient's negative feedback to question 2 and 3 of pelvic organ prolapse distress inventory 6 (POPDI-6). Patient's satisfaction was reported using validated quality of life questionnaires. Multi-channel urodynamic study was used to report any voiding problems related to the prolapse surgery 6 months after surgery.

    RESULTS: 119 patients completed a minimum of 3 years follow-up. 89.8% is the overall prolapse correction success rate for SIM A and 73.3% for SSF group (p = 0.020), and 96.6% versus 73.4% at the anterior vaginal compartment respectively (p ≤ 0.001). Statistically significant difference was noticed in apical compartment with 98.3% with SIM A and 85.0% with SSF (p = 0.009). The subjective success rate, 86.4% in the SIM A and 70.0% in the SSF arm (p = 0.030) was significantly noted. Only, Pelvic Organ Prolapse Distress Inventory-6 (POPDI-6) showed significant improvement. Operation time and intra-operative blood loss tend to be more with SIM A.

    CONCLUSION: SIM A has better 3 years objective and subjective cure rate than SSF in the anterior and/or apical compartment prolapse.

    Matched MeSH terms: Surgical Mesh*
  7. Lo TS, Lin YH, Chu HC, Cortes EF, Pue LB, Tan YL, et al.
    J Obstet Gynaecol Res, 2017 Jan;43(1):173-178.
    PMID: 27762470 DOI: 10.1111/jog.13158
    AIM: By investigating the association of urodynamics and urogenital nerve growth factor (NGF) levels in vaginal mesh surgery, we may be able to associate the likelihood of postoperative lower urinary tract symptoms developing as a result of synthetic mesh implanted for pelvic floor reconstructive surgery.

    METHODS: Thirty-eight female Sprague-Dawley rats were divided into three groups: mesh, sham (no mesh), and control. Urodynamic study and NGF analysis of the urogenital tissues were done and results were compared among all groups. The urodynamic studies of the mesh and sham groups were further divided into the 4th and 10th days. A P-value mesh and sham groups when compared to the control. The mesh group showed a larger area of inflammation as compared to the sham. The NGF levels increased significantly in the mesh and sham groups on the 4th and 10th days when compared to the control (P < 0.001, P < 0.001, respectively). Both the mesh and sham groups had shorter voiding interval and lower voiding volume on days 4 and 10 when compared to the control group (P mesh group than the sham group.

    CONCLUSION: A higher level of NGF in the early days post-transvaginal mesh implantation is associated with a shorter voiding interval and a smaller bladder capacity, which represents abnormal lower urinary tract symptoms following transvaginal mesh implantation.

    Matched MeSH terms: Surgical Mesh*
  8. Lo TS, Yusoff FM, Kao CC, Jaili S, Uy Patrimonio MC
    Taiwan J Obstet Gynecol, 2017 Jun;56(3):346-352.
    PMID: 28600046 DOI: 10.1016/j.tjog.2017.04.015
    OBJECTIVE: Transvaginal mesh anterior-posterior (TVM-AP) provides better cure rates in the surgical treatment of vaginal cuff eversion than anterior transvaginal mesh combined with sacrospinous ligament fixation (TVM-A). We determine the outcomes after TVM-A and TVM-AP surgeries in advanced vaginal cuff prolapse.

    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.

    Matched MeSH terms: Surgical Mesh*
  9. Wong PS, Tan GP
    Med J Malaysia, 2000 Dec;55(4):516-9.
    PMID: 11221168
    We report two cases of large chest wall primary chondrosarcoma, one of the sternum and the other of the lateral chest wall. Both were treated by radical resection and reconstruction using marlex mesh and methyl methacrylate "sandwich" prosthesis and pedicled latissiumus dorsi flap.
    Matched MeSH terms: Surgical Mesh
  10. Murali G, Amran M, Fediuk R, Vatin N, Raman SN, Maithreyi G, et al.
    Materials (Basel), 2020 Dec 11;13(24).
    PMID: 33322254 DOI: 10.3390/ma13245648
    Ferrocement panels, while offering various benefits, do not cover instances of low and moderated velocity impact. To address this problem and to enhance the impact strength against low-velocity impact, a fibrous ferrocement panel is proposed and investigated. This study aims to assess the flexural and low-velocity impact response of simply supported ferrocement panels reinforced with expanded wire mesh (EWM) and steel fibers. The experimental program covered 12 different ferrocement panel prototypes and was tested against a three-point flexural load and falling mass impact test. The ferrocement panel system comprises mortar reinforced with 1% and 2% dosage of steel fibers and an EWM arranged in 1, 2, and 3 layers. For mortar preparation, a water-cement (w/c) ratio of 0.4 was maintained and all panels were cured in water for 28 days. The primary endpoints of the investigation are first crack and ultimate load capacity, deflection corresponding to first crack and ultimate load, ductility index, flexural strength, crack width at ultimate load, a number of impacts needed to induce crack commencement and failure, ductility ratio, and failure mode. The finding revealed that the three-layers of EWM inclusion and steel fibers resulted in an additional impact resistance improvement at cracking and failure stages of ferrocement panels. With superior ultimate load capacity, flexural strength, crack resistance, impact resistance, and ductile response, as witnessed in the experiment program, ferrocement panel can be a positive choice for many construction applications subjected to repeated low-velocity impacts.
    Matched MeSH terms: Surgical Mesh
  11. Abdul Azam F', Razak Z, Md Radzi MKF, Muhamad N, Che Haron CH, Sulong AB
    Polymers (Basel), 2020 Sep 13;12(9).
    PMID: 32933225 DOI: 10.3390/polym12092083
    The incorporation of kenaf fiber fillers into a polymer matrix has been pronounced in the past few decades. In this study, the effect of multiwalled carbon nanotubes (MWCNTs) with a short kenaf fiber (20 mesh) with polypropylene (PP) added was investigated. The melt blending process was performed using an internal mixer to produce polymer composites with different filler contents, while the suitability of this melt composite for the injection molding process was evaluated. Thermogravimetric analysis (TGA) was carried out to investigate the thermal stability of the raw materials. Rheological analyses were conducted by varying the temperature, load factor, and filler content. The results demonstrate a non-Newtonian pseudoplastic behavior in all samples with changed kenaf fillers (10 to 40 wt %) and MWCNT contents (1 to 4 wt %), which confirm the suitability of the feedstock for the injection molding process. The addition of MWCNTs had an immense effect on the viscosity and an enormous reduction in the feedstock flow behavior. The main contribution of this work is the comprehensive observation of the rheological characteristics of newly produced short PP/kenaf composites that were altered after MWCNT additions. This study also presented an adverse effect on the composites containing MWCNTs, indicating a hydrophilic property with improved water absorption stability and the low flammability effect of PP/kenaf/MWCNT composites. This PP/kenaf/MWCNT green composite produced through the injection molding technique has great potential to be used as car components in the automotive industry.
    Matched MeSH terms: Surgical Mesh
  12. Siow SL, Wong CM, Hardin M, Sohail M
    J Med Case Rep, 2016 Jan 18;10:11.
    PMID: 26781191 DOI: 10.1186/s13256-015-0780-8
    Traumatic diaphragmatic rupture and traumatic abdominal wall hernia are two well-described but rare clinical entities associated with blunt thoracoabdominal injuries. To the best of our knowledge, the combination of these two clinical entities as a result of a motor vehicle accident has not been previously reported.
    Matched MeSH terms: Surgical Mesh*
  13. Sath S
    Malays Orthop J, 2020 Nov;14(3):184-187.
    PMID: 33403084 DOI: 10.5704/MOJ.2011.031
    Complications in the form of esophageal injury, tracheal injury, injury to carotids, implant failure, loosening of screws, etc do occur after anterior cervical surgeries. Although intra-operative esophageal injuries are as such rare, there have been few reports of delayed esophageal perforation as well after anterior cervical surgeries. We report a very rare case of migration of missing screw from anterior cervical plate after anterior cervical corpectomy and plating, which had ultimately migrated down to colon and had to be removed via colonoscopy. Along with removal of migrated screw from colon, revision of failed anterior cervical surgery was done wherein plate and screws were removed with mesh cage left in-situ as it was snug-fit while pharyngeophageal perforation was explored and was found to be spontaneously healing, with addition of posterior Bohlman's interspinous wiring for added stability. Migration of screw from the anterior cervical plate into the colon although very rare, should be always kept in mind and its potentially serious complications. We also conclude that particular attention should be given to elderly people with poor bony quality who have high chances of implant failure, along with attention to proper cage size, screw position and proper locking of the screw to further lessen the chances of implant failure.
    Matched MeSH terms: Surgical Mesh
  14. Lo TS, Tan YL, Cortes EF, Lin YH, Wu PY, Pue LB
    Aust N Z J Obstet Gynaecol, 2015 Dec;55(6):593-600.
    PMID: 26299981 DOI: 10.1111/ajo.12397
    To clinically and sonographically evaluate the influence of anterior vaginal mesh (AVM) surgery with concomitant mid-urethral sling surgery (MUS) for stress urinary incontinence (SUI).
    Matched MeSH terms: Surgical Mesh*
  15. Lo TS, Cortes EFM, Wu PY, Tan YL, Al-Kharabsheh A, Pue LB
    Eur J Obstet Gynecol Reprod Biol, 2016 Mar;198:138-144.
    PMID: 26849040 DOI: 10.1016/j.ejogrb.2016.01.004
    OBJECTIVE: To evaluate the sonologic and clinical outcome of collagen coated (CC) versus non-collagen coated (NC) anterior vaginal mesh (AVM) for pelvic organ prolapse (POP) surgery.

    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.

    Matched MeSH terms: Surgical Mesh*
  16. Awaiz A, Rahman F, Hossain MB, Yunus RM, Khan S, Memon B, et al.
    Hernia, 2015 Dec;19(6):1027-9.
    PMID: 26496998 DOI: 10.1007/s10029-015-1432-z
    Matched MeSH terms: Surgical Mesh*
  17. Hassan MA, Yunus RM, Khan S, Memon MA
    World J Surg, 2021 10;45(10):3080-3091.
    PMID: 34279690 DOI: 10.1007/s00268-021-06238-6
    BACKGROUND: With many different operative techniques in use to reduce the incidence of incisional hernias (IH) following a midline laparotomy, there is no consensus among the clinicians on the efficacy and safety of any particular repair technique. This meta-analysis compares the prophylactic onlay mesh repair (POMR) and primary suture repair (PSR) for the incidence of IH.

    METHODS: A meta-analysis and systematic review of MEDLINE, PubMed Central (via PubMed), Embase (via Ovid), SCOPUS, ScienceDirect, Google Scholar, SCI and Cochrane Library databases were undertaken. Seven randomized controlled trials assessing the outcomes of PSR and POMR were analyzed in accordance with the PRISMA statement. The risk of bias was assessed using the Rob2 tool.

    RESULTS: According to the pooled analysis, POMR significantly reduced the incidence of IH compared to the PSR (OR 5.82 [95% CI 2.69, 12.58] P 

    Matched MeSH terms: Surgical Mesh
  18. Premnath N, Lo HL, Cheong YT, Manjit S
    Med J Malaysia, 2002 Sep;57(3):368-70.
    PMID: 12440279
    Removal of the whole sternum for malignant tumours results in a large defect, causing severe deformity and possible paradoxical movements of the chest wall. The reconstruction of the resultant large defect of the chest wall is often complex and difficult. Commonly used materials include rib autograft, steel strus acrylic plate and various synthetic meshes such as Goretex or Marlex mesh, with a myocutaneous flap for coverage. A case of a 48-year-old man with sternal chondrosarcoma successfully treated with thoracoplasty using acrylic plate-marlex mesh combination following near total resection of sternum is reported.
    Matched MeSH terms: Surgical Mesh*
  19. Rengarajoo J, Harun RH, Royan SJ, Kohir S, Mamat MR
    Ann R Coll Surg Engl, 2022 Jul;104(7):556.
    PMID: 35174718 DOI: 10.1308/rcsann.2021.0299
    Matched MeSH terms: Surgical Mesh
  20. Tan YL, Lo TS, Khanuengkitkong S, Krishna Dass A
    Taiwan J Obstet Gynecol, 2014 Sep;53(3):348-54.
    PMID: 25286789 DOI: 10.1016/j.tjog.2013.08.004
    The objective of this study was to estimate the association of vaginal sacrospinous ligament fixation with anterior-transobturator mesh repair surgery for advanced pelvic organ prolapse in patients of two different age groups.
    Matched MeSH terms: Surgical Mesh*
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