Displaying publications 1 - 20 of 27 in total

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  1. Lo TS, Pue LB, Tan YL, Wu PY
    Int Urogynecol J, 2016 Jun;27(6):923-31.
    PMID: 26700103 DOI: 10.1007/s00192-015-2912-5
    INTRODUCTION AND HYPOTHESIS: To study the outcomes following repeat midurethral sling (MUS) surgery in patients with persistent or recurrent stress urinary incontinence after failure of primary MUS surgery and risk factors for surgical failure.

    METHODS: The medical records of 24 patients who underwent repeat MUS surgery at a single tertiary center from January 2004 to February 2014 were reviewed. The types of MUS used for the repeat surgey were transobturator, retropubic and single incision slings. Objective cure was defined as no demonstrable involuntary leakage of urine during increased abdominal pressure in the absence of a detrusor contraction observed during filling cystometry, and subjective cure was defined as a negative response to Urogenital Distress Inventory six (UDI-6) question 3 during follow-up between 6 months and 1 year postoperatively. The change in the inclination angle between the urethra and pubic axis was measured with introital ultrasonography and the cotton swab test performed.

    RESULTS: The objective and subjective cure rates were 79.2 % and 75 %, respectively. There were no differences in demographics between the patients with failure of surgery and those with successful surgery. Significant independent risk factors for failure of repeat MUS surgery were a change in cotton swab angle at rest and straining of <30° (OR 4.6, 95 % CI 2.5 - 7.9°), a change in inclination angle of <30° (OR 4.6, 95 % CI 2.5 - 7.9°), intrinsic sphincter deficiency (OR 3.4, 95 % CI 1.8 - 6.1) and a mean urethral closure pressure of <60 cm H2O (OR 2.9, 95 % CI 1.5 - 4.5). In one patient the bladder was perforated.

    CONCLUSIONS: Repeat MUS surgery is safe and has a good short-term success rate, both objectively and subjectively, with independent risk factors for failure related to bladder neck hypomobility and poor urethral function.

  2. 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.
  3. Pue LB, Lo TS, Wu PY, Tan YL
    J Obstet Gynaecol Res, 2014 Feb;40(2):611-3.
    PMID: 24245849 DOI: 10.1111/jog.12174
    Abdominal sacrocolpopexy is a well-established procedure for the reconstruction of apical support in pelvic organ prolapse. Its long-term efficacy is well known; however, it is also associated with higher perioperative morbidity when compared with the less invasive transvaginal approach. Long-term risk of bowel-related complication from abdominal sacrocolpopexy is rare, but can be significant as it is often serious and requires major surgical intervention. Here we highlight an unusual case of strangulated small bowel (in this instance complicated with sepsis secondary to peritonitis), 14 years after an abdominal sacrocolpopexy procedure. This example amplifies the need for proper preoperative counseling; also, life-long follow-up is necessary for patients undergoing this procedure.
  4. 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 

  5. Tan YL, Suharjono H, Lau NL, Voon HY
    Med J Malaysia, 2016 Jun;71(3):111-6.
    PMID: 27495883
    The contemporary obstetrician is increasingly put to the test by rising numbers of pregnancies with morbidly adherent placenta. This study illustrates our experience with prophylactic bilateral internal iliac artery occlusion as part of its management.
  6. 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).
  7. Lo TS, Tan YL, Wu PY, Cortes EF, Pue LB, Al-Kharabsheh A
    PMID: 25265496 DOI: 10.1016/j.ejogrb.2014.09.015
    To evaluate the ultrasound morphology and its clinical outcome among women who had undergone Miniarc™ vs Monarc™ in the treatment of stress urinary incontinence (SUI).
  8. 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
  9. 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).
  10. 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.

  11. 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.
  12. 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.
  13. 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.

  14. 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.

  15. 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.

  16. Lo TS, Pue LB, Tan YL, Long CY, Lin YH, Wu PY
    Taiwan J Obstet Gynecol, 2016 Aug;55(4):519-24.
    PMID: 27590375 DOI: 10.1016/j.tjog.2015.12.019
    OBJECTIVE: Voiding dysfunction following a midurethral sling procedure is still a relevant consequence that can affect patients' quality of life. Various invasive methods have been described to manage this problem. We hypothesize that we if we could diagnose the condition early using noninvasive tools, we would be able to offer appropriate effective management. We sought to study the effectiveness of attaching a tension-releasing suture on a single-incision sling (SIS) tape as a prophylactic measure for the treatment of immediate postoperative voiding dysfunctions, and secondarily, to evaluate the objective and subjective cure rates of the treatment for stress urinary incontinence.

    MATERIALS AND METHODS: It is a prospective observational study. A tension-releasing suture was prepared by appending a polyglactin suture to one end of the MiniArc sling tip fiber, which could be used to manipulate the sling tip when postoperative voiding dysfunction was identified. Primary outcome measure was the number of patients requiring tension-releasing suture manipulation to treat postoperative voiding dysfunctions successfully.

    RESULTS: Twelve of the 131 (9.2%) patients who underwent SIS procedure for urodynamic stress incontinence surgery required tension-releasing suture manipulation due to voiding dysfunction during the immediate postoperative period with a good outcome. Postoperative overall objective and subjective cure rates were 90.5% and 88.9% (126 available patients at 1-year follow up, mean 19.2 ± 8.0 months), respectively. The subanalysis of the objective and subjective cure rates of the group with tension-releasing suture manipulation were 91.7% (11/12) and 91.7% (11/12), and those of the group without tension-releasing suture manipulation were 90.4% (103/114) and 88.6% (101/114), respectively, at 1-year follow up.

    CONCLUSION: Tension-releasing suture is effective in the management of immediate postoperative voiding dysfunction in an SIS procedure. SIS operation has good short-term objective and subjective cure rates for female urodynamic stress incontinence.

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