Displaying publications 1 - 20 of 99 in total

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  1. Lew YS, Lim SK
    Med J Malaysia, 1998 Sep;53(3):227-31.
    PMID: 10968158
    An approach to cannulate right internal jugular vein in neutral head position is described for situations where head rotation and extension are contraindicated. Venous puncture was made immediately lateral to the carotid artery at the level of cricoid cartilage and directed caudad. In 40 patients studied, the right internal jugular vein of 97.5% of the patients were successfully located by the finder needle. The mean (SE) number of puncture attempts to locate the vein was 1.3 (0.1) per patient. In 72.5% (29 patients), the veins were located exactly at the predicted point after the first attempt. However the overall success rate for cannulation by the angiocath cannula was 87.5% and short term complication rate was 5.0%. We conclude this technique is a reliable, safe alternative for central venous access, especially in patients where cervical spine movement is contraindicated or restricted.
  2. Lim SK, Lew YS
    Med J Malaysia, 1997 Jun;52(2):151-4.
    PMID: 10968073
    The first two years anaesthetic experience of paediatric day care surgery is reviewed. Four hundred and three patients underwent 447 general surgical procedures. The mean age of the patients was 5.4 years with the youngest being 5 months old. The commonest procedures performed were herniotomy, circumcision, correction of hydrocoele and orchidopexy. The overall postoperative admission rare was 2.5%. No major complications were seen. Anaesthesia for paediatric day care surgery is safe provided patients are carefully selected and evaluated, appropriate anaesthetic management instituted and proper discharge criteria adhered to.
  3. Lim SK, Fadhilah T, Ibtisan I
    Paediatr Anaesth, 1998;8(4):337-40.
    PMID: 9672933
    Congenital laryngotracheo-oesophageal cleft is a rare anomaly which presents a challenge to the anaesthetists because of the potential problems of establishing and maintaining an airway. We report the anaesthetic management of a one-month old baby with complete or type IV laryngotracheo-oesophageal presenting for the repair of the defect. The management of the precarious airway is presented and the various techniques of managing the airway are reviewed.
  4. Lim SK, Loh SP
    Med J Malaysia, 1997 Mar;52(1):64-9.
    PMID: 10968055
    Blood glucose concentration was measured in 100 children immediately before and during surgery. These children were randomly assigned to receive either lactated Ringer's (LR) solution or 5% dextrose in lactated Ringer's (5%D/LR) intraoperatively as maintenance and replacement fluids. Blood samples were taken immediately after induction of anaesthesia and at 1/2, 1, 1.5, 2 and subsequent hours. Blood glucose concentration was assayed by a reflectance meter. None of the patients was noted to be hypoglycaemic pre- and intraoperatively. Intraoperative blood glucose concentration increased significantly (p < 0.05) from preoperative levels for both groups of children but the increase in those that received 5%D/LR was significantly greater (p < 0.05) than those who received LR. The number of children who were hyperglycaemic during surgery was also greater in those who received 5% dextrose in lactated Ringer's as their intraoperative fluid. These data suggest that lactated Ringer's alone is a safe and appropriate fluid for intraoperative fluid therapy in children.
  5. Lim SK, Elegbe EO
    Med J Malaysia, 1991 Dec;46(4):349-55.
    PMID: 1840444
    The effectiveness of sodium citrate as a prophylaxis against acid aspiration syndrome was studied in 3 groups of obstetric patients. Group I was the control group which consisted of 20 patients in established labour who were not likely to require caesarean section. No antacid had been given to these patients. Group II consisted of 20 patients who underwent elective caesarean section, while Group III consisted of another 20 patients who underwent emergency caesarean section. Group II and III were given 30ml of 0.3M sodium citrate as soon as they arrived in the operation theatre. The gastric content was aspirated after the induction of anaesthesia and at the end of surgery just before extubation. The volume was measured and a sample sent for pH analysis. Sodium citrate was found to increase the gastric pH significantly in both Group II and III patients when compared with Group I patients who underwent emergency caesarean section. We conclude that 30ml of 0.3M sodium citrate is effective in increasing gastric pH though it tends to be associated with an increase in gastric volume.
  6. Lim SK, Tan SY
    JUMMEC, 2007;10(2):51-56.
    MyJurnal
    Systemic lupus erythematosus (SLE) is one of the commonest systemic autoimmune diseases that can present with variable clinical manifestations. Intravenous Immunoglobulin (IVIG) has been used as a salvage therapy for severe lupus with encouraging results though there is yet randomised trial to support the usage. This report highlights the efficacy and safety of high dose IVIG in SLE patients with multi-organ involvement particularly lupus nephritis. We also reviewed the literature on the usage of IVIG for lupus nephritis. However, more studies are needed to further clarify the optimal therapeutic dosage and regime for IVIG and to identify the group of patients who might benefit the most from this expensive therapy.
  7. Lim SK, Elegbe EO
    Singapore Med J, 1992 Dec;33(6):608-10.
    PMID: 1488672
    The efficacy of a single oral dose of 0.3M of sodium citrate alone as a prophylaxis against acid aspiration syndrome in obstetric patients undergoing LSCS (elective and emergency) was compared with that of intravenous ranitidine. One group of patients was given 30 ml of 0.3M sodium citrate orally just before the induction of anaesthesia while the other group was given 50mg of ranitidine intravenously together with the 30ml of 0.3M sodium citrate. This was done for both the elective and the emergency groups of patients. There was no significant difference in the mean pH of the gastric aspirate obtained from those given sodium citrate alone and those given sodium citrate and ranitidine in either the elective or the emergency group. However, in the emergency group, those who were given sodium citrate alone tend to have a larger volume of gastric aspiration when compared with those given ranitidine together with the sodium citrate. There were significantly more patients with gastric aspirates of more than 25ml in the emergency group to which sodium citrate alone was given. It would appear that supplementing an intravenous dose of ranitidine with the oral dose of sodium citrate is useful in emergency LSCS as a prophylaxis against acid aspiration syndrome.
  8. Lim SK, Khoo BY
    Oncol Lett, 2021 Nov;22(5):785.
    PMID: 34594426 DOI: 10.3892/ol.2021.13046
    There has been increased interest in using stem cells for regenerative medicine and cancer therapy in the past decade. Mesenchymal stem cells (MSCs) are among the most studied stem cells due to their unique characteristics, such as self-renewal and developmental potency to differentiate into numerous cell types. MSC use has fewer ethical challenges compared with other types of stem cells. Although a number of studies have reported the beneficial effects of MSC-based therapies in treating various diseases, their contribution to cancer therapy remains controversial. The behaviour of MSCs is determined by the interaction between intrinsic transcriptional genes and extrinsic environmental factors. Numerous studies continue to emerge, as there is no denying the potential of MSCs to treat a wide variety of human afflictions. Therefore, the present review article provided an overview of MSCs and their differences compared with embryonic stem cells, and described the molecular mechanisms involved in maintaining their stemness. In addition, the article examined the therapeutic application of stem cells in the field of cancer. The present article also discussed the current divergent roles of MSCs in cancer therapy and the future potential in this field.
  9. Lim SK, Lee SWH
    PLoS One, 2024;19(3):e0296067.
    PMID: 38446815 DOI: 10.1371/journal.pone.0296067
    INTRODUCTION: Chronic kidney disease (CKD) is a global health concern which results in significant economic burden. Despite this, treatment options are limited. Recently, dapagliflozin has been reported have benefits in people with CKD. This study aimed to evaluate the cost-effectiveness of dapagliflozin as an add-on to standard of care (SoC) in people with CKD in Malaysia.

    METHODS: A Markov model was adapted to estimate the economic and clinical benefits of dapagliflozin in people with Stage 2 to 5 CKD. The cost-effectiveness was performed based upon data from the Dapagliflozin and Prevention of Adverse Outcomes in Chronic Kidney Disease (DAPA-CKD) trial supplemented with local costs and utility data whenever possible.

    RESULTS: In Malaysia, dapagliflozin in combination with SoC was the dominant intervention compared to SoC alone (RM 81,814 versus RM 85,464; USD19,762 vs USD20,644). Adding dapagliflozin to SoC in people with CKD increased life expectancy by 0.46 years and increased quality-adjusted life years (QALY) by 0.41 in comparison with SoC alone (10.01 vs. 9.55 years, 8.76 vs. 8.35 QALYs). This translates to a saving of RM8,894 (USD2,148) with every QALY gained. The benefits were due to the delay in CKD progression, resulting in lower costs of dialysis and renal transplantation. Results were robust to variations in assumptions over disease management costs as well as subgroup of population that would be treated and below the accepted willingness-to-pay thresholds of RM 46,000/QALY.

    CONCLUSION: The use of dapagliflozin was projected to improved life expectancy and quality of life among people with CKD, with a saving RM8,894 (USD2,148) for every quality-adjusted life-year gained and RM7,898 (USD1,908) saving for every life year gained.

  10. Norsidah AM, Lim SK, Ibtisan I, Misiran K
    Med J Malaysia, 1996 Dec;51(4):420-5.
    PMID: 10968028
    Anaesthesia for the separation of conjoined twins requires a well-prepared, multidisciplinary team. Each patient for surgery is different and the extent of organ sharing and coexisting anomalies must be determined before surgery so that problems can be anticipated. We report our experience of the anaesthetic management for the separation of six sets of conjoined twins. Anaesthesia and surgery were prolonged, massive blood loss and transfusion, hypothermia, electrolyte imbalance and infection being the main perioperative problems encountered.
  11. Lim SK, Lim WL, Elegbe EO
    West Afr J Med, 1996 Oct-Dec;15(4):186-9.
    PMID: 9020593
    30 patients who received electroconvulsive therapy were anaesthetized with either Propofol or Methohexitone in a randomized cross-over study. Recovery times were shorter in those who received Propofol. The decrease in diastolic pressure after induction was greater with Propofol than with Methohexitone. There was a greater increase in the blood pressure after the electroconvulsive therapy in those who received Methohexitone. The duration of convulsion was similar for both agents.
  12. Lim SK, Lim JK, Yoon IK
    Infect Chemother, 2017 Jun;49(2):91-100.
    PMID: 28681575 DOI: 10.3947/ic.2017.49.2.91
    Zika virus (ZIKV) was first isolated in Asia from mosquitoes from Malaysia in 1966. However, the incidence of Zika and Zika-related neurological complications in Asia is not well known. The few studies of Zika in Asia have been inconsistent in pointing to likely transmission levels, with some studies suggesting substantial transmission and others not. Interpretation of existing epidemiological and public health data from Asia is constrained by the non-specific symptomatology of Zika, the high proportion of subclinical ZIKV infections, relatively low viremia, and the lack of accurate serological assays. Here, we update the status of Zika cases from countries in Asia, and highlight some key knowledge gaps. In particular, accurate determinations of the incidence of Zika-related congenital Zika syndrome should be a priority for Zika research in Asia. Additional information will be critical to make informed strategies for the prevention and control of this global public health threat.
  13. Teh YM, Mualif SA, Lim SK
    Int J Biochem Cell Biol, 2022 02;143:106153.
    PMID: 34974186 DOI: 10.1016/j.biocel.2021.106153
    As part of the glomerular filtration membrane, podocyte is terminally differentiated, structurally unique, and highly specialized in maintaining kidney function. Proteinuria caused by podocyte injury (foot process effacement) is the clinical symptom of various kidney diseases (CKD), including nephrotic syndrome. Podocyte autophagy has become a powerful therapeutic strategy target in ameliorating podocyte injury. Autophagy is known to be associated significantly with sirtuin-1, proteinuria, and podocyte injury. Various key findings in podocyte autophagy were reported in the past ten years, such as the role of endoplasmic reticulum (ER) stress in podocyte autophagy impairment, podocyte autophagy-related gene, essential roles of the signaling pathways: Mammalian Target of Rapamycin (mTOR)/ Phosphoinositide 3-kinase (PI3k)/ serine/threonine kinase 1 (Akt) in podocyte autophagy. These significant factors caused podocyte injury associated with autophagy impairment. Sirtuin-1 was reported to have a vital key role in mTOR signaling, 5'AMP-activated protein kinase (AMPK) regulation, autophagy activation, and various critical pathways associated with podocyte's function and health; it has potential value to podocyte injury pathogenesis investigation. From these findings, podocyte autophagy has become an attractive therapeutic strategy to ameliorate podocyte injury, and this review will provide an in-depth review on therapeutic targets he podocyte autophagy.
  14. Huri HZ, Lim LP, Lim SK
    Drug Des Devel Ther, 2015;9:4355-71.
    PMID: 26300627 DOI: 10.2147/DDDT.S85676
    BACKGROUND: Good glycemic control can delay the progression of kidney diseases in type 2 diabetes mellitus (T2DM) patients with renal complications. To date, the association between antidiabetic agents and glycemic control in this specific patient population is not well established.

    PURPOSE: This study aimed to identify antidiabetic regimens as well as other factors that associated with glycemic control in T2DM patients with different stages of chronic kidney disease (CKD).

    PATIENTS AND METHODS: This retrospective, cross-sectional study involved 242 T2DM inpatients and outpatients with renal complications from January 2009 to March 2014 and was conducted in a tertiary teaching hospital in Malaysia. Glycated hemoglobin (A1C) was used as main parameter to assess patients' glycemic status. Patients were classified to have good (A1C <7%) or poor glycemic control (A1C ≥7%) based on the recommendations of the American Diabetes Association.

    RESULTS: Majority of the patients presented with CKD stage 4 (43.4%). Approximately 55.4% of patients were categorized to have poor glycemic control. Insulin (57.9%) was the most commonly prescribed antidiabetic medication, followed by sulfonylureas (43%). Of all antidiabetic regimens, sulfonylureas monotherapy (P<0.001), insulin therapy (P=0.005), and combination of biguanides with insulin (P=0.038) were found to be significantly associated with glycemic control. Other factors including duration of T2DM (P=0.004), comorbidities such as anemia (P=0.024) and retinopathy (P=0.033), concurrent medications such as erythropoietin therapy (P=0.047), α-blockers (P=0.033), and antigouts (P=0.003) were also correlated with A1C.

    CONCLUSION: Identification of factors that are associated with glycemic control is important to help in optimization of glucose control in T2DM patients with renal complication.

  15. Chai HC, Chua KH, Lim SK, Phipps ME
    J Immunol Res, 2014;2014:529167.
    PMID: 24741605 DOI: 10.1155/2014/529167
    Polymorphisms in genes involved in toll-like receptor/interferon signalling pathways have been reported previously to be associated with SLE in many populations. This study aimed to investigate the role of seven single nucleotide polymorphisms within TNFAIP3, STAT4, and IRF5, which are involved in upstream and downstream pathways of type I interferon production, in SLE in the South East Asian populations. Genotyping of 360 Malaysian SLE patients and 430 normal healthy individuals revealed that minor alleles of STAT4 rs7574865 and rs10168266 were associated with elevated risk of SLE in the Chinese and Malay patients, respectively (P = 0.028, odds ratio (OR) = 1.42; P = 0.035, OR = 1.80, respectively). Polymorphisms in TNFAIP3 and IRF5 did not show significant associations with SLE in any of the ethnicities. Combined analysis of the Malays, Chinese, and Indians for each SNP indicated that STAT4 rs10168266 was significantly associated with the Malaysian SLE as a whole (P = 0.014; OR = 1.435). The meta-analysis of STAT4 rs10168266, which combined the data of other studies and this study, further confirmed its importance as the risk factor for SLE by having pooled OR of 1.559 and P value of <0.001.
    Study site: University of Malaya Medical Centre (UMMC), Kuala Lumpur, Malaysia
  16. Lim SK, Kung AW, Sompongse S, Soontrapa S, Tsai KS
    Curr Med Res Opin, 2008 Jan;24(1):99-106.
    PMID: 18028585
    OBJECTIVE: To review data on the prevalence of vitamin D inadequacy and its causes in postmenopausal women in Eastern Asia.

    RESEARCH DESIGN AND METHOD: Data were obtained from the published biomedical literature as well as abstracts and posters presented at scientific meetings. Using MEDLINE, EMBASE and BIOSIS databases (to July 2007), epidemiological studies were identified using the search terms: 'human', 'vitamin D', 'vitamin D deficiency', 'vitamin D inadequacy', 'vitamin D insufficiency' and 'hypovitaminosis D', 'osteomalacia' and 'osteoporosis'. Additional references were also identified from the bibliographies of published articles.

    RESULTS: The prevalence of vitamin D inadequacy in studies of postmenopausal women (ambulatory or with osteoporosis or related musculoskeletal disorders) in Eastern Asia ranged from 0 to 92%, depending on the cut-off level of serum 25-hydroxycholecalciferol [25(OH)D] that was applied (range < or =6-35 ng/mL [< or = 15-87 nmol/L]). One large international study found that 71% of postmenopausal women with osteoporosis in Eastern Asia had vitamin D inadequacy, defined as serum levels of 25(OH)D < 30 ng/mL (75 nmol/L). Prevalence rates using this cut-off level were 47% in Thailand, 49% in Malaysia, 90% in Japan and 92% in South Korea. High prevalences of vitamin D inadequacy were evident in two studies using a lower 25(OH)D level cut-off value of < 12 ng/mL (30 nmol/L) - 21% in China and 57% in South Korea. Dietary deficiency and inadequate exposure or reactivity to sunlight (due to lifestyle choices, cultural customs and/or aging) were identified as important risk factors for vitamin D inadequacy.

    CONCLUSIONS: Non-uniform, epidemiological studies indicate a high prevalence of vitamin D inadequacy in postmenopausal women in Eastern Asia. Recommended remedial approaches are education campaigns and broad-based provision of vitamin D supplementation.

  17. Lakhwani MN, Yeoh KCB, Gooi BH, Lim SK
    Med J Malaysia, 2003 Aug;58(3):420-8.
    PMID: 14750383
    A prospective study of all infrarenal abdominal aortic aneurysm (AAA) repairs both as electives and emergencies in Penang between January 1997 to December 2000 is presented. The objectives of the study were to determine the age, gender, racial distribution of the patients, the incidence, and risk factors and to summarize treatments undertaken and discuss the outcome. Among the races, the Malays were the most common presenting with infrarenal AAA. The mean age of patients operated was 68.5 years. Males were more commonly affected compared to females (12:1). Most infrarenal AAA repairs were performed as emergency operations, 33 cases (61.1%) compared to electives, 21 cases (38.9%). Total survival was 70.3% (elective 85.7%; emergency 57.6%). Mortality rate was 31.5% and the primary reason is the lack of operating time available for urgent operation and for treatment of concurrent disease states. Mycotic aneurysm with its triad of abdominal pain, fever and abdominal mass resulted in a significantly higher mortality (46.6%). Ninety six percent of the infrarenal AAA had transverse diameter greater than 6 cm. Morphologically 90.7% were fusiform AAA rather than saccular aneurysm (9.3%). Pulmonary complications (35.2%) were more common than cardiac complications (11.1%) possibly related to the urgent nature of the operation, smoking or history of pulmonary tuberculosis. Bleeding (14.8%) was the most common cause of mortality in ruptured mycotic infrarenal AAA.
  18. Sakhor W, Teoh TC, Yusof R, Lim SK, Razif MFM
    Trop Biomed, 2020 Sep 01;37(3):609-625.
    PMID: 33612776 DOI: 10.47665/tb.37.3.609
    The hepatitis C virus (HCV) consists of eight genotypes and 90 subtypes, with genotype (GT) 3 being the second most common globally and is linked to higher incidences of steatosis and rapid development of fibrosis and cirrhosis. The NS3/4A serine protease, a heterodimer complex of two HCV non-structural proteins, is an effective target for pharmaceutical intervention due to its essential roles in processing HCV polyproteins and inhibiting innate immunity. This study combines structure-based virtual screening (SBVS) of predefined compound libraries, pharmacokinetic prediction (ADME/T) and in vitro evaluation to identify potential low molecular weight (<500 Dalton) inhibitors of the NS3/4A serine protease (GT3). In silico screening of ZINC and PubChem libraries yielded five selected compounds as potential candidates. Dose-dependent inhibition of the NS3/4A serine protease and HCV replication in HuH-7.5 cells revealed that compound A (PubChem ID No. 16672637) exhibited inhibition towards HCV GT3 with an IC50 of 106.7µM and EC50 of 25.8µM, respectively. Thus, compound A may be developed as a potent, low molecular weight drug against the HCV NS3/4A serine protease of GT3.
  19. Lim SK, Othman R, Yusof R, Heh CH
    Chem Biol Drug Des, 2021 01;97(1):28-40.
    PMID: 32657543 DOI: 10.1111/cbdd.13756
    Structure-based virtual screening (SBVS) has served as a popular strategy for rational drug discovery. In this study, we aimed to discover novel benzopyran-based inhibitors that targeted the NS3 enzymes (NS3/4A protease and NS3 helicase) of HCV G3 using a combination of in silico and in vitro approaches. With the aid of SBVS, six novel compounds were discovered to inhibit HCV G3 NS3/4A protease and two phytochemicals (ellagic acid and myricetin) were identified as dual-target inhibitors that inhibited both NS3/4A protease and NS3 helicase in vitro (IC50  = 40.37 ± 5.47 nm and 6.58 ± 0.99 µm, respectively). Inhibitory activities against the replication of HCV G3 replicons were further assessed in a cell-based system with four compounds showed dose-dependent inhibition. Compound P8 was determined to be the most potent compound from the cell-based assay with an EC50 of 19.05 µm. The dual-target inhibitor, ellagic acid, was determined as the second most potent (EC50  = 32.37 µm) and the most selective in its inhibitory activity against the replication of HCV replicons, without severely affecting the viability of the host cells (selectivity index > 6.18).
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