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  1. 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.

  2. 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.

  3. Lo TS, Shailaja N, Hsieh WC, Uy-Patrimonio MC, Yusoff FM, Ibrahim R
    Int Urogynecol J, 2017 Apr;28(4):575-582.
    PMID: 27647467 DOI: 10.1007/s00192-016-3144-z
    INTRODUCTION AND HYPOTHESIS: The objective of this study was to identify the predictors of postoperative voiding dysfunction in women following extensive vaginal pelvic reconstructive surgery.

    METHODS: We enrolled 1,425 women who had pelvic organ prolapse of POP-Q stage III or IV and had undergone vaginal pelvic reconstructive surgery with or without transvaginal mesh insertion from January 2006 to December 2014. All subjects were required to complete a 72-h voiding diary, and the IIQ-7, UDI-6, POPDI-6 and PISQ-12 questionnaires. Urodynamic study was performed preoperatively and postoperatively.

    RESULTS: Of the 1,425 women, 54 were excluded due to incomplete data, and 1,017 of the remaining 1,371 (74.2 %) had transvaginal mesh surgery and 247 (18 %) had concurrent midurethral sling insertion. Of 380 women (27.7 %) with preoperative voiding dysfunction, 37 (9.7 %) continued to have voiding dysfunction postoperatively. Of the remaining 991 women (72.3 %) with normal preoperative voiding function, 11 (1.1 %) developed de novo voiding dysfunction postoperatively. The overall incidence of postoperative voiding dysfunction was 3.5 % (48/1,371). Those with concurrent midurethral sling insertion were at higher risk of developing voiding dysfunction postoperatively (OR 3.12, 95 % CI 1.79 - 5.46, p 

  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.
  5. 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.

  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.

  7. Lo TS, Harun F, Alzabedi A, Chiung HK, Jhang LS, Hsieh WC
    J Minim Invasive Gynecol, 2024 Feb;31(2):102-109.
    PMID: 37952873 DOI: 10.1016/j.jmig.2023.11.003
    STUDY OBJECTIVE: To determine the outcome of voiding function 1 year after pelvic reconstructive surgery (PRS) in women with bladder outlet obstruction (BOO).

    DESIGN: Retrospective cohort study.

    SETTING: Tertiary referral hospital.

    PATIENTS: A total of 1894 women underwent PRS for advanced pelvic organ prolapse (POP) stages 3 to 4 with urodynamic findings of BOO.

    INTERVENTIONS: PRS.

    MEASUREMENTS: The primary outcome measured was the resumption of normal voiding function, defined clinically with multichannel urodynamic testing at 1 year postoperatively. The secondary outcomes were to identify the different risk factors for persistence voiding dysfunction (VD) 1 year after PRS.

    MAIN RESULTS: A total of 431 women with Pelvic Organ Prolapse Quantification stages 3 and 4, urodynamic study of maximum urinary flow rate ≤15 mL/s, and detrusor pressure at maximum flow ≥20 cm H2O were included. Resumption of normal voiding function was found in 91% (n = 392 of 431), whereas 9% (n = 39 of 431) remained to have VD 1 year postoperatively. Those with persistent VD, 20.5% (n = 8 of 39) remained having urodynamic diagnosis of BOO. Univariate and multivariate logistic regression revealed factors associated with postoperative VD were pre-operative maximal cystometric capacity ≥500 mL and postvoid residual volume ≥200 mL.

    CONCLUSION: VD may persist in women with BOO after PRS, particularly in those with preoperative maximal cystometric capacity of >500 mL and postvoid residual volume >200 mL.

  8. Lo TS, Harun F, Chua S, Shen YH, Tan YL, Hsieh WC
    J Formos Med Assoc, 2024 Mar;123(3):331-339.
    PMID: 37996329 DOI: 10.1016/j.jfma.2023.11.003
    BACKGROUND AND PURPOSE: We present this current study to complement with mesh inlays plausible benefits (UPHOLD-LITE System) on available long-term study amidst FDA's concern on mesh complications. This study aims to assess the medium-term outcomes of UPHOLD-LITE system for treatment of advanced pelvic organ prolapse (POP) and its complications, and lower urinary tract symptoms.

    METHODS: This is a retrospective case series of 53 months follow-up of 123 consecutive patients who underwent UPHOLD-LITE system. Objective outcome measures the anatomical correction of prolapse with POP-Q ≤ Stage 1. Subjective outcome was patient's feedback to questions 2 and 3 of POPDI-6. Secondary outcome measures the quality of life, presence of lower urinary tract symptoms and complications. Quality of life is assessed by validated questionnaires on Urogenital Distress Inventory 6 (UDI-6), Incontinence Impact Questionnaire 7 (IIQ-7), Pelvic Organ Prolapse Distress Inventory 6 (POPDI-6), and Pelvic Organ Prolapse/Urinary Incontinence Sexual Function Questionnaire 12 (PISQ-12) at 1 and 3 years post-operatively.

    RESULTS: Objective outcome at 1 and 3 years was at 96.7 % and 95.4 % respectively. The subjective cure was 95.1 % and 91.6 %. Five-year cumulative cure rate maintained at 87.2 %. Secondary outcomes observed improvement on UDI-6, IIQ-7, POPDI-6 and PISQ-12 postoperatively. Bladder outlet obstruction improved while de novo urodynamic stress incontinence (USI) increased slightly post surgically. Mesh erosion rate was 0.8 %.

    CONCLUSION: The UPHOLD-LITE system demonstrated good medium term anatomical correction of apical and anterior prolapse, with good subjective cure and improved quality of life. Whilst complication rate was low, slight increase in de novo USI was observed.

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