Displaying all 11 publications

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  1. Tan YL, Voon HY, Ngeh N
    Med J Malaysia, 2018 06;73(3):170-171.
    PMID: 29962501
    We report the peculiar case of a patient who consumed raw rice daily and had iron-deficiency anaemia secondary to menorrhagia with underlying polycystic ovarian syndrome. A 32-year-old lady of Asian descent presented with symptoms of fatigue, lethargy and prolonged, irregular periods for the last two months. There was noticeable increase in body weight, male pattern alopecia and facial acne. In addition, she experienced sudden, unexplained predilection towards consumption of raw rice (up to 300- 400g/day). The patient was treated with oral iron and cyclical progestin. After three weeks, her haemoglobin improved and her ryzophagia subsided. Gynaecologists should be vigilant of pica, which can occur outside of the context of pregnancy and also poses potential health risks including tooth attrition, electrolyte imbalance, intestinal obstruction and poisoning.
  2. Tan LN, Mariappa G, Voon HY, Suharjono H
    Med J Malaysia, 2017 12;72(6):380-381.
    PMID: 29308782 MyJurnal
    Severe sepsis with multi-organ failure is associated with a high mortality rate. This case report highlights the challenges and modalities available in the management of a lady with refractory shock and disseminated intravascular coagulation (DIC) due to toxic shock syndrome (TSS) from genital tract sepsis. Early surgical intervention to remove the source of infection, the use of recombinant activated factor VII to treat intractable disseminated intravascular coagulation and intravenous immunoglobulin to neutralise the circulating exotoxins, have been employed and shown to drastically improve outcomes.
  3. Voon HY, Wong AT, Ting ML, Suharjono H
    Med J Malaysia, 2015 Aug;70(4):224-7.
    PMID: 26358018 MyJurnal
    BACKGROUND: The Cervical Ripening Balloon (CRB) is a novel mechanical method for induction of labour (IOL), reducing the risks of hyperstimulation associated with pharmacological methods. However, there remains a paucity of literature on its application in high risk mothers, who have an elevated risk of uterine rupture, namely those with previous scars and grandmultiparity.

    METHODOLOGY: A retrospective study on IOL using the CRB in women with previous caesarean section or grandmultiparity between January 2014 and March 2015. All cases were identified from the Sarawak General Hospital CRB request registry. Individual admission notes were traced and data extracted using a standardised proforma.

    RESULTS: The overall success rate of vaginal delivery after IOL was 50%, although this increases to about two-thirds when sub analysis was performed in women with previous tested scars and the unscarred, grandmultiparous woman. There was a significant change in Bishop score prior to insertion and after removal of the CRB. The Bishop score increased by a score of 3.2 (95% CI 2.8-3.6), which was statistically significant (p<0.01) and occurred across both subgroups, not limited to the grandmultipara. There were no cases of hyperstimulation but one case of intrapartum fever and scar dehiscence each (1.4%). Notably, there were two cases of change in lie/presentation after CRB insertion.

    CONCLUSION: CRB adds to the obstetricians' armamentarium and appears to provide a reasonable alternative for the IOL in women at high risk of uterine rupture. Rates of hyperstimulation, maternal infection and scar dehiscence are low and hence appeals to the user.

  4. Voon HY, Amin R, Kok JL, Tan KS
    Fetal Diagn Ther, 2018;43(1):77-80.
    PMID: 28796996 DOI: 10.1159/000479105
    We illustrate a case of giant placental chorioangioma presenting at 20 weeks of gestation. Subsequent monitoring revealed enlargement of the lesion, associated with fetal anemia and cardiac failure, prompting in utero intervention. Amnioreduction followed by percutaneous embolization of the tumour with enbucrilate:Lipiodol Ultra-Fluid™ at a dilution of 1:5 was successfully performed. No repeat intervention or additional supportive measures were required throughout pregnancy and the baby was delivered at 36 weeks of gestation, following spontaneous labour. Due to prolonged neonatal jaundice, further investigations were undertaken, demonstrating subacute right portal vein thrombosis. Other previously reported causes of neonatal portal vein thrombosis such as umbilical vein thrombosis, neonatal umbilical vein catheterization, thrombophilia and sepsis were excluded. There was resolution of the thrombus by 6 months of life. A brief discussion of measures to minimize the risk of such an event and the long-term outcomes of neonatal portal vein thrombosis was included. Whilst the simplicity and efficacy of the procedure has been demonstrated in a handful of patients, judgment on its safety is best deferred. Counselling should be comprehensive, as even rare complications can result in significant postnatal morbidity.
  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. Voon HY, Suharjono HN, Shafie AA, Bujang MA
    Taiwan J Obstet Gynecol, 2018 Jun;57(3):332-339.
    PMID: 29880160 DOI: 10.1016/j.tjog.2018.04.002
    OBJECTIVE: Postpartum hemorrhage remains the leading cause of maternal mortality in developing countries and a significant proportion of these cases are attributable to uterine atony. In contrast to the advances made in the treatment of postpartum hemorrhage, there has been few novel prophylactic agents. This study was undertaken to analyze the effectiveness of carbetocin compared to oxytocin for the prevention of postpartum hemorrhage, in the context of cesarean deliveries.

    MATERIALS AND METHODS: Major electronic databases were searched for randomized-controlled trials comparing carbetocin with oxytocin. Only trials involving cesarean deliveries were included. Non-randomized trials, non-cesarean deliveries, studies which did not directly compare carbetocin to oxytocin and studies which did not analyze the intended outcomes were excluded. Outcomes analysed were postpartum hemorrhage, additional use of uterotonic and transfusion requirement.

    RESULTS: Seven studies involving 2012 patients were included in the meta-analysis. There was a significant reduction in the rates of postpartum hemorrhage (RR 0.79; 95% CI 0.66 to 0.94; p = 0.009), use of additional uterotonics (RR 0.57; 95% CI 0.49 to 0.65; p 

  7. Voon HY, Leong MS, Li CW, Bujang A, Suharjono H
    Med J Malaysia, 2017 10;72(5):259-263.
    PMID: 29197879 MyJurnal
    BACKGROUND: In the course of managing preterm labour, increasing trends of total white cell count raises concern for the obstetrician, suggesting a possible underlying infectious aetiology. Although mild leukocytosis is expected in pregnancy, the patterns of increment after corticosteroid administration are not well described beyond animal models and in a small number of human studies.

    METHODS: Seventy-three consecutive patients who required antenatal corticosteroids for either preterm labour or prelabour caesarean section were recruited and given a standard course of 12mg dexamethasone phosphate, twelve hours apart. Venous blood samples were taken before administration, at six hours and 36 hours after the first dose of dexamethasone.

    RESULTS: The total white count trend was 10.31±2.62 at baseline, 11.44±3.05 at six hours and 12.20±3.49 at 36 hours. Neutrophil-lymphocyte ratio was 3.60±1.31, 8.73±3.63 and 3.24±1.49 respectively, reflecting relative neutrophilia and lymphopenia which normalised by 36 hours.

    CONCLUSION: In contrast to previous studies, we found only a slight increment in total white cell count of about 10%. The marginal changes described in our study would not normally raise any clinical concern, although vigilance should be exercised if higher levels were observed.

  8. Voon HY, Shafie AA, Bujang MA, Suharjono HN
    J Obstet Gynaecol Res, 2018 Jan;44(1):109-116.
    PMID: 29027315 DOI: 10.1111/jog.13486
    AIM: To evaluate the cost effectiveness of carbetocin compared to oxytocin when used as prophylaxis against post-partum hemorrhage (PPH) during cesarean deliveries.

    METHODS: A systematic review of the literature was performed to identify randomized controlled trials that compared the use of carbetocin to oxytocin in the context of cesarean deliveries. Cost effectiveness analysis was then performed using secondary data from the perspective of a maternity unit within the Malaysian Ministry of Health, over a 24 h time period.

    RESULTS: Seven randomized controlled trials with over 2000 patients comparing carbetocin with oxytocin during cesarean section were identified. The use of carbetocin in our center, which has an average of 3000 cesarean deliveries annually, would have prevented 108 episodes of PPH, 104 episodes of transfusion and reduced the need for additional uterotonics in 455 patients. The incremental cost effectiveness ratio of carbetocin for averting an episode of PPH was US$278.70.

    CONCLUSION: Reduction in retreatment, staffing requirements, transfusion and potential medication errors mitigates the higher index cost of carbetocin. From a pharmacoeconomic perspective, in the context of cesarean section, carbetocin was cost effective as prophylaxis against PPH. Ultimately, the relative value placed on the outcomes above and the individual unit's resources would influence the choice of uterotonic.

  9. Voon HY, Pow JY, Tan LN, Suharjono HN, Teo WS
    BMC Pregnancy Childbirth, 2019 Jul 11;19(1):240.
    PMID: 31296180 DOI: 10.1186/s12884-019-2373-9
    BACKGROUND: Ragged placental membranes is a distinct entity from retained placenta and not uncommonly reported in midwifery texts. Although the incidence of postpartum endometritis is merely 1-5% after vaginal births, it remains the most common source of puerperal sepsis, contributing up to 15% of maternal mortality in low income countries. Geographically-remote centres in Malaysia prophylactically administer antibiotics for women with ragged placental membranes after vaginal birth, extrapolating evidence from retained placenta. We sought to clarify the rationale in continuing such practices.

    METHODS: This was an open-label, prospective, multicentre, randomized trial. Three hospitals where the current protocol was to administer prophylactic amoxycillin-clavulanic acid served as the sites of recruitment. Women who delivered vaginally beyond 24+ 0 weeks of gestation with ragged membranes were invited to participate in the trial and randomized into prophylaxis or expectant management with medical advice by blocks of 10, at a 1:1 ratio. A medication adherence diary was provided and patients followed up at 2 weeks and 6 weeks postpartum.

    RESULTS: A total of 6569 women gave birth vaginally in three centres during the trial period, of which 10.9% had ragged membranes. The incidence of endometritis was not significantly raised in women with or without prophylaxis (0.90% vs 0.29%; p = 0.60). All cases of endometritis presented within the first 2 weeks and preventive use of antibiotics did not ameliorate the severity of endometritis since rates of ICU admission, surgical evacuation and transfusion were comparable.

    CONCLUSION: Preventive use of antibiotics after vaginal delivery in women with ragged placental membranes did not result in a reduction of endometritis. Educating women on the signs and symptoms of endometritis would suffice. Based on the reported incidence of ragged membranes, a change in practice would result in 1500 less prescriptions of antibiotics per annum in these three centres.

    TRIAL REGISTRATION: NCT03459599 (Retrospectively registered on 9 March 2018).

  10. Voon HY, Chai MC, Hii LY, Amin R, Suharjono HN
    J Obstet Gynaecol, 2018 May;38(4):493-497.
    PMID: 29433369 DOI: 10.1080/01443615.2017.1389867
    Strategies to prevent mortality from obstetric venous thromboembolism begin with identification, risk stratification and subsequently, implementation of prophylactic measures. We sought to identify the burden of pharmacologic thromboprophylaxis in postpartum women, including the main clinical indications and its uptake in a multireligious population, with Islam as the official religion. A total of 2514 deliveries between 1st January to 31st December 2016, across three centres in Malaysia were reviewed retrospectively from hospital-based registries. 770 (30.62%) patients fulfilled the criteria for thromboprophylaxis based on the revised 2015 criteria proposed by the Royal College of Obstetricians and Gynaecologists. A combination of age, parity, BMI, caesarean section and preterm births were the main indications. One out of the five patients who delivered vaginally required thromboprophylaxis. In our setting with a sizable Muslim population, low molecular weight heparin was the thromboprophylaxis of choice in more than two-third of the patients. The information obtained from this study allows better local resource planning. Impact statement What is already known on this subject: Risk factors for venous thromboembolism in pregnancy and puerperium are largely drawn from registries due to the rarity of the index event. Up to 7% of women require antenatal thromboprophylaxis based on the criteria proposed by the Royal College of Obstetrician and Gynaecologists in 2009. What do the results of this study add: Using the RCOG guideline revised in 2015, a significant proportion of women delivering vaginally would require postnatal thromboprophylaxis based on age, parity and BMI. When either age or parity, both with relatively low odds ratio for thrombosis were omitted, a substantial proportion of women would not achieve the threshold for prophylaxis. Despite a sizable Muslim population in the country, the uptake of low molecular weight heparin was relatively high. What are the implications of these findings for clinical practice and/or future research: Cost-benefit studies should consider the adjusted odds ratio of individual indications on a VTE event. While uptake and acceptability is high, prospective studies on medication adherence is equally pertinent.
  11. Kajdy A, Sys D, Pokropek A, Shaw SW, Chang TY, Calda P, et al.
    Int J Gynaecol Obstet, 2023 Jan;160(1):167-186.
    PMID: 35932096 DOI: 10.1002/ijgo.14388
    OBJECTIVE: To assess risk factors for anxiety and depression among pregnant women during the COVID-19 pandemic using Mind-COVID, a prospective cross-sectional study that compares outcomes in middle-income economies and high-income economies.

    METHODS: A total of 7102 pregnant women from 12 high-income economies and nine middle-income economies were included. The web-based survey used two standardized instruments, General Anxiety Disorder-7 (GAD-7) and Patient Health Questionnaire-9 (PHQ-9).

    RESULT: Pregnant women in high-income economies reported higher PHQ-9 (0.18 standard deviation [SD], P 

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