Displaying publications 1 - 20 of 38 in total

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  1. 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.

  2. Lo TS, Jaili SB, Ibrahim R
    Taiwan J Obstet Gynecol, 2017 Aug;56(4):534-537.
    PMID: 28805613 DOI: 10.1016/j.tjog.2016.10.004
    OBJECTIVE: Urethral diverticulum is uncommon, therefore appropriate evaluation, preoperative planning and counseling must be done in order to make correct diagnosis and prevent complications.

    MATERIALS AND METHODS: A case of anterior vaginal wall mass was treated elsewhere by a gynecologist as periurethral cyst abscess; incision and drainage were done but a symptom of pus discharge was observed after 2 weeks. Therefore, exploration, cyst wall excision and primary closure were done though histopathological examination surprisingly confirmed the presence of urethral tissue suggestive of diverticulum.

    RESULTS: Subsequently, she developed persistent urinary leakage along with urethrovaginal fistula for which they again performed pervaginal multilayer closure. Patient was later referred to us with recurrent urethrovaginal fistula. We performed posterior urethral fistulectomy with anterior vaginal wall flap and multilayer closure. Three years follow up reveals complete recovery.

    CONCLUSION: Even urethral diverticulum is a rare condition, should be kept in mind as early diagnosis and management.

  3. Lo TS, Tan YL, Cortes EF, Pue LB, Wu PY, Al-Kharabsheh A
    J Minim Invasive Gynecol, 2015 Jan;22(1):50-6.
    PMID: 25017520 DOI: 10.1016/j.jmig.2014.07.002
    To study the surgical and functional outcomes of single-incision mesh surgery for treatment of advanced pelvic organ prolapse (POP).
  4. Lo TS, Pue LB, Tan YL, Hsieh WC, Kao CC, Uy-Patrimonio MC
    Int Urogynecol J, 2019 07;30(7):1163-1172.
    PMID: 30008078 DOI: 10.1007/s00192-018-3691-6
    INTRODUCTION AND HYPOTHESIS: Our primary objective is to determine the presence of SUI at 6-12 months after surgery. The secondary objective is to determine the objective and subjective outcomes of POP.

    METHODS: A retrospective study conducted between February 2015 and July 2016 at Chang Gung Memorial Hospital. The subjects had had symptomatic anterior or apical prolapse with stage III or IV and undergone pelvic reconstructive surgery using Uphold™ LITE. Patients completed a 3-day voiding diary, urodynamic study, real-time ultrasonography and validated quality-of-life questionnaires at baseline and 12-month follow-up. Primary outcome was the absence of USI. Secondary outcomes included the objective cure rate of POP, ≤ stage 1 at the anterior/apical vaginal wall, and the subjective cure rate, negative feedback to POPDI-6.

    RESULTS: Ninety-five women were eligible. Six were excluded because of incomplete data. The postoperative de novo USI and SUI were 22.7 and 19.7%, respectively. There was significant improvement of USI in patients who had MUS insertion (93.8%) and bladder outlet obstruction (96.7%). The objective and subjective cure rate for prolapse was 95.5 and 94.3%, respectively. POP-Q measurements pre- and postoperatively were significantly improved at all points except for Gh and Pb. There was a significant difference in the distance between the bladder neck to the distal end of the mesh during straining both at both the postoperative 3rd month and 1 year.

    CONCLUSIONS: Uphold™ mesh has a 20% incidence of de novo USI with acceptable objective and subjective cure rates at 1 year postoperatively. The de novo USI rate was high but not bothersome enough to require surgery.

  5. 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.

  6. 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
  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 

  8. Lo TS, Tan YL, Cortes EF, Wu PY, Pue LB, Al-Kharabsheh A
    Aust N Z J Obstet Gynaecol, 2015 Jun;55(3):284-90.
    PMID: 26044791 DOI: 10.1111/ajo.12340
    The Food and Drug Administration has recently highlighted an increase in reported complications associated with the use of transvaginal mesh.
  9. 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.
  10. Lo TS, Chua S, Kao CC, Uy-Patrimonio MC, Ibrahim R, Tan YL
    J Minim Invasive Gynecol, 2018 Jan;25(1):116-123.
    PMID: 28826955 DOI: 10.1016/j.jmig.2017.08.647
    STUDY OBJECTIVE: To evaluate the effectiveness and safety of the MiniArc single-incision sling in the treatment of urodynamic stress incontinence (USI) through 5 years.

    DESIGN: Retrospective observational study (Canadian Task Force classification II-2).

    SETTING: Tertiary referral center.

    PATIENTS: Eighty-five patients with USI without needing concurrent procedures who underwent anti-incontinence surgery using the MiniArc SIMS from February 2010 to December 2011.

    INTERVENTIONS: Anti-incontinence surgery.

    MEASUREMENTS AND MAIN RESULTS: Objective cure was defined as no demonstrable leakage of urine on the cough stress test and 1-hour pad test weight <2 g. Subjective cure was based on negative response to Urinary Distress Inventory question 3, no leakage on coughing, sneezing, or laughing. Most patients were postmenopausal, overweight, and multiparous. Postoperative USI significantly improved (p 

  11. Lo TS, Jaili S, Tan YL, Wu PY
    Int Urogynecol J, 2016 Nov;27(11):1653-1659.
    PMID: 27085545
    INTRODUCTION AND HYPOTHESIS: We hypothesized that transobturator tape (TOT) is safe and efficacious for the treatment of urodynamic stress incontinence in the long term.

    METHODS: We conducted a prospective study of patients with confirmed urodynamic stress incontinence (USI) who underwent a Monarc(TM) TOT procedure in a tertiary center between February 2006 and March 2009 without other concurrent surgical procedures. Urodynamics were conducted at 1 and 3 years postoperatively. Subjective evaluation included Incontinence Impact Questionnaire (IIQ-7), Urinary Distress Inventory Questionnaire (UDI-6), and Pelvic Organ Prolapse/Urinary Incontinence Sexual Questionnaire (PISQ-12). Objective cure was defined as no urinary leakage demonstrable on provocative filling cystometry and/ or 1-h pad test of <2 g. Subjective cure was based on a negative response to question 3 in UDI-6. Paired-samples t test, chi-square, and Fisher exact tests were applied; p 

  12. Lo TS, Ng KL, Lin YH, Hsieh WC, Kao CC, Tan YL
    Int Urogynecol J, 2021 May 18.
    PMID: 34003308 DOI: 10.1007/s00192-021-04757-3
    INTRODUCTION AND HYPOTHESIS: Our primary objective was to study outcomes of patients with intrinsic sphincter deficiency (ISD) following mid-urethral slings (MUS) at 1-year. Our secondary objective was to delineate factors affecting success in these patients.

    METHODS: Six hundred eighty-eight patients who had MUS between January 2004 and April 2017 were reviewed retrospectively; 48 women were preoperatively diagnosed with ISD. All completed urodynamic studies and validated quality-of-life (QOL) questionnaires at baseline and 1 year. Primary outcomes were objective and subjective cure of stress incontinence, defined as no involuntary urine leakage during filling cystometry and 1-h pad test < 2 g and negative response to Urogenital Distress Inventory-6 Question 3. Ultrasound was performed to determine tape position, urethral mobility and kinking at 1 year.

    RESULTS: Women with ISD had significantly lower objective and subjective cure rates of 52.1% and 47.9%, respectively, compared to an overall of 88.2% and 85.9%. QOL scores significantly improved in those with successful surgeries. The sling type did not make a difference. Multivariate logistic regression identified reduced urethral mobility [OR 2.11 (1.24-3.75)], lower maximum urethral closure pressure (MUCP) [OR 1.61 (1.05-3.41)] and tape position [OR 3.12 (1.41-8.71)] to be associated with higher odds of failed slings for women with ISD.

    CONCLUSIONS: Although there are good overall success in women undergoing MUS, those with ISD have significantly lower cure rates at 1 year. Factors related to failure include reduced urethral mobility, low MUCP and relative tape position further away from the bladder neck. Optimal management of patients with ISD and reduced urethral mobility remains challenging.

  13. 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).
  14. Lo TS, Pue LB, Hung TH, Wu PY, Tan YL
    J Obstet Gynaecol Res, 2015 Jul;41(7):1099-107.
    PMID: 25808989 DOI: 10.1111/jog.12678
    To evaluate and compare the long-term outcome of sacrospinous ligament fixation (SSF) in combination with various other compartment defect native tissue repairs with hysterectomy or hysteropexy.
  15. Lo TS, Al-Kharabsheh AM, Pue LB, Ng KL, Huang TX
    J Urol, 2020 10;204(4):787-792.
    PMID: 32898974 DOI: 10.1097/JU.0000000000001085
    PURPOSE: We evaluated mid urethral sling outcomes in overweight and obese patients compared to normal weight patients and identified risk factors for failure in this population.

    MATERIALS AND METHODS: Records of 688 women between January 2004 and July 2017 were retrospectively reviewed. Patients received urodynamic studies, 1-hour pad test, Urogenital Distress Inventory-6 and Incontinence Impact Questionnaire-7, and were divided into normal weight, overweight and obese. Objective cure at 1 year was defined as no involuntary urine leakage during filling cystometry and pad test less than 2 gm. Subjective cure was established by negative response to question 3 on Urogenital Distress Inventory-6. McNemar's test, chi-square test, Mann-Whitney U and Fisher's exact test were used for paired categorical variables. Independent samples t-tests and paired t-test were used for continuous parametric variables. Multivariate logistic regression was used to identify risk factors for failure.

    RESULTS: Objective and subjective cure in normal, overweight and obese patients was 91.4% and 89.1%, 87.5% and 86%, and 76% and 70.1%, respectively. There was no difference in surgical complications. Obese patients had worse quality of life scores preoperatively and postoperatively. Risk factors in obese patients with failed mid urethral sling included 66 years old or older (OR 2.02, 1.56-3.98), menopause (OR 4.21, 1.21-14.22), previous prolapse surgery (OR 4.57, 2.36-8.52), diabetes (OR 2.79, 1.61-5.99) and intrinsic sphincter deficiency (OR 5.06, 3.08-9.64).

    CONCLUSIONS: Obese women with mid urethral sling had lower objective and subjective cure at 1 year and worse quality of life scores compared to normal and overweight women. Risk factors for failure include age, diabetes, menopause, previous prolapse surgery and intrinsic sphincter deficiency.

  16. Lo TS, Shailaja N, Tan YL, Wu MP, Chua S, Roy KW
    Int Urogynecol J, 2020 04;31(4):717-726.
    PMID: 31832716 DOI: 10.1007/s00192-019-04171-w
    INTRODUCTION AND HYPOTHESIS: To study the surgical outcomes and risk factors for failure of three types of mid urethral slings(MUS) surgeries in elderly and old age women with urodynamic stress incontinence(USI).

    METHODS: Three different types of MUS surgeries [single incision sling(SIS), trans-obturator tape(TOT), retro-public mid-urethral sling-tension-free vagina tape (TVT)]were performed among three age groups of women (young <64 yr, elderly 65-74 yr and old >75 yr) with USI. They were followed up for 1 year.

    RESULTS: Complete postoperative data was available for 688 women. After 1 year, overall objective cure rate was 88.2% and subjective cure rate was 85.9%. Among the young, elderly, and old age women objective cure rates were 91.0%, 80.6%, 66.7% and subjective cure rates were 89.2%, 77.6%, 58.3% respectively. Urodynamic parameters demonstrated flow rate, higher post-void bladder residual, smaller cystometric capacity, and lower maximum urethral closure pressure were significantly lower among old and elderly group. Subjectively, urinary distress inventory-6 (UDI-6) and incontinence impact questionnaire-7(IIQ-7) improved significantly in all groups with significant changes from baseline only in older women. Intrinsic sphincter deficiency(ISD) was found to be significantly associated with failure in older women. Other preoperative comorbidities were equally distributed among all the three age groups. The operative time, perioperative complications, and length of hospital stay showed no difference between the study groups.

    CONCLUSIONS: MUS surgery is safe for the young and aging patients with USI and demostrated significant improvement in its outcomes, but objective and subjective cure rates decreases with age. ISD was also found to be significantly associated with failure.

  17. Lo TS, Tan YL, Pue LB, Chua S, Wu MP, Hsieh WC
    Int Urogynecol J, 2020 09;31(9):1949-1957.
    PMID: 32006069 DOI: 10.1007/s00192-019-04213-3
    INTRODUCTION AND HYPOTHESIS: Mixed urinary incontinence (MUI) is defined as symptomatic complaint of involuntary leakage associated with urgency and also with exertion, effort, sneezing or coughing. The paucity of research, especially on the surgical management of MUI, limits its best management.

    METHODS: This is a retrospective study to determine the outcomes of mixed urinary incontinence after mid-urethral sling surgery with two groups, urodynamic stress incontinence (USI) with urgency and urodynamic mixed urinary incontinence (MUI-UD; USI and detrusor overactivity [DO]).

    RESULTS: Ninety women (USI + urgency group) with preoperative USI and urgency and no demonstrable DO/DOI attained an objective cure of 82.2%, whereas the remaining 67 (MUI-UD group) women with both USI and DO/DOI were reported to have an objective cure of only 55.2%. Subjective cures were 81.1% and 53.7% respectively. The type of incontinence surgery does not affect postoperative outcomes in either of the groups. Demographic factors identified to have a significant negative effect on cure rates were postmenopausal status (p = 0.005), prior hysterectomy (p = 0.028), pre-operative smaller blafdder capacity (p = 0.001), and a larger volume of pre-operative pad test (p = 0.028). A lower mid-urethral closure pressure (MUCP) was significant with post-operative failure of treatment with MUI-UD group (68.8 ± 36.2 cmH2O vs 51.9 ± 24.7 cmH2O; p = 0.033).

    CONCLUSIONS: Although there is evidence for a good cure of the stress component of MUI, urodynamic investigation with its findings prior to management of MUI could have greater implications for selective patient centered counseling. Presence of DO or DOI on urodynamics resulted in poorer objective and subjective outcomes.

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