Displaying publications 1 - 20 of 2981 in total

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  1. Banga Singh KK, Ojha SC, Deris ZZ, Rahman RA
    Z Gesundh Wiss, 2011 Jun;19(3):231-236.
    PMID: 21654922
    AIMS: In Malaysia, Shigella spp. is the third most common bacterial agent responsible for childhood diarrhoea. This study was conducted to determine the prevalence and antimicrobial susceptibility patterns of Shigella spp. isolated from patients admitted to the Hospital Universiti Sains Malaysia from January 2001 to December 2009. SUBJECTS AND METHODS: A hospital-based retrospective study was used. Stool samples from patients were cultured using a standard culture method. Shigella spp. isolates were identified by biochemical and serological methods, and the antimicrobial susceptibility pattern was evaluated using the Kirby-Bauer disc-diffusion method. RESULTS: A total of 138 Shigella spp. were isolated from a total of 14,830 routine stool specimens, yielding an isolation rate of 0.93% that corresponded to 9.99% of the 1,381 bacterial pathogens isolated. Of these isolates, S. sonnei was the predominant species, followed by S. flexneri and S. boydii. Seasonal variation was noticed, and no significant differences were detected in the demographic data for S. flexneri and S. sonnei. The susceptibility of all isolated Shigella strains was tested against seven antibiotics. Ceftriaxone (99.1%), ciprofloxacin (98.4%), and nalidixic acid (93.8%) were effective against the Shigella strains, whereas tetracycline and trimethoprim-sulfamethoxazole exhibited high frequencies of resistance (58.4% and 53.8%, respectively). CONCLUSION: This study is important for public health education aimed at reducing the morbidity and mortality associated with Shigella spp. infection. Our results also will be helpful for paediatricians and microbiologists in the selection of appropriate antibiotics for the management of diarrhoea.
    Matched MeSH terms: Retrospective Studies
  2. Ngow H, Teh LK, Langmia IM, Lee WL, Harun R, Ismail R, et al.
    Xenobiotica, 2008 Jun;38(6):641-51.
    PMID: 18570163 DOI: 10.1080/00498250801999087
    1. A retrospective study was conducted to explore the importance of CYP2C9 genotyping for the initiation and maintenance therapy of warfarin in clinical practice. A total of 191 patients on warfarin therapy in a local hospital were recruited after written informed consent. Their medical records were reviewed and no intervention of warfarin dose was performed. 2. A total of 5 ml of blood were taken from each subject for DNA extraction and identification of 1, 2, 3 and 4 CYP2C9 alleles, using a nested-allele-specific-multiplex-polymerase chain reaction (PCR). Half the patients were Malays and the remaining were Chinese. 3. Two genotypes were detected; 93.2% had CYP2C9 1/1 and 6.8% were CYP2C9 1/3. Warfarin doses were higher in patients with CYP2C91/1. Patients with the 1/3 genotype experienced a higher rate of serious and life-threatening bleeding; 15.4 versus 6.2 per 100 patients per 6 months. 4. The observation clearly highlights the inadequacy of the current dosing regimens and the need to move toward a more individualized approach to warfarin therapy. Prospective clinical studies are now being conducted to assess dosing algorithms that incorporate the contribution of the genotype to allow the individualization of warfarin dose.
    Matched MeSH terms: Retrospective Studies
  3. Habib MA, Ibrahim F, Mohktar MS, Kamaruzzaman SB, Rahmat K, Lim KS
    World Neurosurg, 2016 Apr;88:576-585.
    PMID: 26548833 DOI: 10.1016/j.wneu.2015.10.096
    BACKGROUND: Electroencephalography source imaging (ESI) is a promising tool for localizing the cortical sources of both ictal and interictal epileptic activities. Many studies have shown the clinical usefulness of interictal ESI, but very few have investigated the utility of ictal ESI. The aim of this article is to examine the clinical usefulness of ictal ESI for epileptic focus localization in patients with refractory focal epilepsy, especially extratemporal lobe epilepsy.

    METHODS: Both ictal and interictal ESI were performed by the use of patient-specific realistic forward models and 3 different linear distributed inverse models. Lateralization as well as concordance between ESI-estimated focuses and single-photon emission computed tomography (SPECT) focuses were assessed.

    RESULTS: All the ESI focuses (both ictal and interictal) were found lateralized to the same hemisphere as ictal SPECT focuses. Lateralization results also were in agreement with the lesion sides as visualized on magnetic resonance imaging. Ictal ESI results, obtained from the best-performing inverse model, were fully concordant with the same cortical lobe as SPECT focuses, whereas the corresponding concordance rate is 87.50% in case of interictal ESI.

    CONCLUSIONS: Our findings show that ictal ESI gives fully lateralized and highly concordant results with ictal SPECT and may provide a cost-effective substitute for ictal SPECT.

    Matched MeSH terms: Retrospective Studies
  4. Wong HM, Woo XL, Goh CH, Chee PHC, Adenan AH, Tan PCS, et al.
    World Neurosurg, 2022 01;157:e276-e285.
    PMID: 34648987 DOI: 10.1016/j.wneu.2021.10.074
    BACKGROUND: Burr hole drainage is the criterion standard treatment for chronic subdural hematoma (CSDH), a common neurosurgical condition. However, apart from the surgical technique, the method of anesthesia also has a significant impact on postoperative patient outcome. Currently, there are limited studies comparing the use of local anesthesia with sedation (LA sedation) versus general anesthesia (GA) in the drainage of CSDH. The objective of this study was to compare the morbidity and mortality outcomes of using LA sedation versus GA in CSDH burr hole drainage.

    METHODS: This retrospective study presents a total of 257 operations in 243 patients from 2 hospitals. A total of 130 cases were operated under LA sedation in hospital 1 and 127 cases under GA in hospital 2. Patient demographics and presenting features were similar at baseline.

    RESULTS: Values are shown as LA sedation versus GA. Postoperatively, most patients recovered well in both groups with Glasgow Outcome Scale scores of 4-5 (96.2% vs. 88.2%, respectively). The postoperative morbidity was significantly increased by an odds ratio of 5.44 in the GA group compared with the LA sedation group (P = 0.005). The mortality was also significantly higher in the GA group (n = 5, 3.9%) than the LA sedation group (n = 0, 0.0%; P = 0.028). The CSDH recurrence rate was 4.6% in the LA sedation group versus 6.3% in the GA group. No intraoperative conversion from LA sedation to GA was reported.

    CONCLUSIONS: This study demonstrates that CSDH drainage under LA sedation is safe and efficacious, with a significantly lower risk of postoperative mortality and morbidity when compared with GA.

    Matched MeSH terms: Retrospective Studies
  5. Renninger M, Fahmy O, Schubert T, Schmid MA, Hassan F, Stenzl A, et al.
    World J Urol, 2020 Feb;38(2):397-406.
    PMID: 31030231 DOI: 10.1007/s00345-019-02780-0
    PURPOSE: To investigate whether hexaminolevulinate-based (HAL) bladder tumor resection (TURBT) impacts on outcomes of patients with primary non-muscle-invasive bladder cancer (NMIBC) who were eventually treated with radical cystectomy (RC).

    METHODS: A total of 131 consecutive patients exhibiting NMIBC at primary diagnosis were retrospectively investigated whether they had undergone any HAL-guided TURBT prior to RC. Uni- and multivariable analyses were used to evaluate the impact of HAL-TURBT on cancer-specific (CSS) and overall survival (OS). The median follow-up was 38 months (IQR 13-56).

    RESULTS: Of the 131 patients, 69 (52.7%) were managed with HAL- and 62 (47.3%) with white light (WL)-TURBT only prior to RC. HAL-TURBT was associated with a higher number of TURBTs prior to RC (p = 0.002) and administration of intravesical chemotherapy (p = 0.043). A trend towards a higher rate of tumor-associated immune cell infiltrates in RC specimens (p = 0.07) and a lower utilization rate of post-operative systemic chemotherapy (p = 0.10) was noted for patients who were treated with HAL-TURBT. The 5-year CSS/OS was 90.9%/74.5% for the HAL-group and 73.8%/55.8% for the WL-group (p = 0.042/0.038). In multivariable analysis, lymph node tumor involvement (p = 0.007), positive surgical margins (p = 0.001) and performance of WL-TURBT only (p = 0.040) were independent predictors for cancer-specific death.

    CONCLUSIONS: The present data suggest that the resection of NMIBC under HAL exerts a beneficial impact on outcomes of patients who will need to undergo RC during their course of disease. This finding may be due to improved risk stratification as the resection under HAL may allow more patients to be treated timely and adequately.

    Matched MeSH terms: Retrospective Studies
  6. Giulioni C, Castellani D, Somani BK, Chew BH, Tailly T, Keat WOL, et al.
    World J Urol, 2023 May;41(5):1407-1413.
    PMID: 36930255 DOI: 10.1007/s00345-023-04363-6
    PURPOSE: To evaluate the perioperative outcomes of retrograde intra-renal surgery (RIRS) for lower pole stones (LPS) and factors affecting stone-free rate (SFR).

    METHODS: Data from 20 centers were retrospectively reviewed. Inclusion criteria were adult patients, normal renal anatomy, and LPS. Exclusion criteria were bilateral surgery, concomitant surgery for ureteral stones. SFR was defined as a single residual fragment (RF) ≤ 2 mm and evaluated 3-months after surgery. A multivariable logistic regression analysis was performed to assess factors associated with RF. Statistical significance was set at p value 

    Matched MeSH terms: Retrospective Studies
  7. Pan KL, Chan WH, Ong GB, Premsenthil S, Zulkarnaen M, Norlida D, et al.
    World J Surg Oncol, 2012;10:105.
    PMID: 22681750 DOI: 10.1186/1477-7819-10-105
    Tumor prostheses currently give the best short- and medium-term results for limb-salvage reconstruction procedures in the treatment of bone tumors. However, in developing countries, the cost of a tumor prosthesis is beyond the reach of much of the population. We report the use of autoclaved tumor-bearing bone in 10 patients, as an affordable alternative to the use of prostheses.
    Matched MeSH terms: Retrospective Studies
  8. Lai HW, Chang YL, Chandrachamnong K, See MH, Huang HI, Lin SL, et al.
    World J Surg Oncol, 2023 Jul 26;21(1):222.
    PMID: 37491239 DOI: 10.1186/s12957-023-03107-5
    BACKGROUND: The current study aims to evaluate the nipple and skin sensation following nipple-sparing mastectomy (NSM) and identify patient-, surgical-, or treatment-related factors affecting nipple or skin sensation in this cohort.

    METHODS: Patients who received NSM with postoperative nipple and skin sensation test evaluation at a single institution over the past 10 years were retrospectively retrieved from a prospectively collected breast cancer surgery database.

    RESULTS: A total of 460 NSM procedures were included in this current study, with the mean age of 48.3 ± 9.1. Three-hundred eighty-three (83.3%) patients had breast reconstructions. One-hundred seventy-four (37.8%) received conventional NSM (C-NSM), 195 (42.4%) endoscopic-assisted NSM (E-NSM), and 91 (19.8%) robotic-assisted NSM (R-NSM) procedures. For nipple sensation assessment, 15 (3.3%) were grade 0, 83 (18.2%) grade I, 229 (49.7%) grade II, and 133 (28.9%) grade III (normal sensation), respectively, with mean grade score of 2.1 ± 0.7. The preserved (grade III) nipple sensation rate was 36.2% (63/174) in the C-NSM group, 26.7% (52/195) in the E-NSM group, and 19.7% (18/91) in the R-NSM group (P = 0.06). The "time since surgery to last evaluation" was significantly longer in the C-NSM group (45.6 ± 34 months) or E-NSM group (44.7 ± 35.8 months) as compared to R-NSM group (31.8 ± 16 months, P  60 months vs. ≦ 12 months: nipple odds ratio (OR) = 5.75, P 

    Matched MeSH terms: Retrospective Studies
  9. Tiong V, Rozita AM, Taib NA, Yip CH, Ng CH
    World J Surg, 2014 Sep;38(9):2288-96.
    PMID: 24700093 DOI: 10.1007/s00268-014-2542-y
    Breast cancer is increasingly reported in young premenopausal women in Asia. Adjuvant chemotherapy improves survival; however, it has a unique consequence of ovarian failure in premenopausal patients.
    Matched MeSH terms: Retrospective Studies
  10. Leow JJ, Lim VW, Lingam P, Go KT, Teo LT
    World J Surg, 2014 Jul;38(7):1694-8.
    PMID: 24510246 DOI: 10.1007/s00268-014-2459-5
    Ethnic disparities in trauma mortality outcomes have been demonstrated in the United States according to the US National Trauma Data Bank. The aim of this study was to determine the effect of race/ethnicity on trauma mortality in Singapore.
    Matched MeSH terms: Retrospective Studies
  11. Yip CH, Taib NA, Choo WY, Rampal S, Thong MK, Teo SH
    World J Surg, 2009 Oct;33(10):2077-81.
    PMID: 19649760 DOI: 10.1007/s00268-009-0146-8
    Mutations in BRCA1 and BRCA2 confer an increased risk to breast and other cancers, but to date there have only been limited numbers of studies of BRCA1- and BRCA2-associated cancers among Asians. Malaysia is a multiracial country with three main races: Malays, Chinese, Indians. We determined whether tumor pathologic features and clinical features differ in patients with and without BRCA mutations in this Asian population.
    Matched MeSH terms: Retrospective Studies
  12. Yip CH, Taib NA, Tan GH, Ng KL, Yoong BK, Choo WY
    World J Surg, 2009 Jan;33(1):54-7.
    PMID: 18958521 DOI: 10.1007/s00268-008-9782-7
    Axillary nodal status is one of the most important prognostic factors in breast cancer. In the present study we used it to determine the predictors of axillary lymph node metastases in breast cancer and to determine if there is a group of patients in whom minimal axillary surgery is indicated.
    Matched MeSH terms: Retrospective Studies
  13. Agarwal G, Pradeep PV, Aggarwal V, Yip CH, Cheung PS
    World J Surg, 2007 May;31(5):1031-40.
    PMID: 17387549
    Breast cancer is the leading cause of cancer-related deaths in Asia, and in recent years is emerging as the commonest female malignancy in the developing Asian countries, overtaking cancer of the uterine cervix. There have been no studies objectively comparing data and facts relating to breast cancer in the developed, newly developed, and developing Asian countries thus far.
    Matched MeSH terms: Retrospective Studies
  14. Wong M, Isa SH, Zahiah M, Azmi KN
    World J Surg, 2007 Mar;31(3):586-92.
    PMID: 17322973
    This study assessed the sensitivities of preoperative localisation modalities such as computed tomography (CT), magnetic resonance imaging (MRI), arteriography and arterial stimulation venous sampling (ASVS) using serum insulin and C-peptide gradients to intraoperative techniques in localising insulin-secreting tumours in our institution.
    Matched MeSH terms: Retrospective Studies
  15. Huei TJ, Lip HTC, Hong LC, Fang CZ, Ann CS, Rou LH, et al.
    World J Surg, 2022 03;46(3):497-503.
    PMID: 35013777 DOI: 10.1007/s00268-021-06408-6
    BACKGROUND: Acute care surgery is an important component of health care in the developed nations. However, in Malaysia, acute care surgery is yet to be recognized as a specific subspecialty service. Due to high demands of limited ICU beds, some patients have to be ventilated in the wards. This study aims to describe the outcomes of acute surgical patients that required mechanical ventilation.

    METHODS: This is a retrospective review of all mechanically ventilated surgical patients in the wards, in a tertiary hospital, in 2020. Sixty-two patients out of 116 patients ventilated in surgical wards fulfilled the inclusion criteria. Demography, surgical diagnosis and procedures and physiologic, biochemical and survival data were analyzed to explore the outcomes and predictors of mortality.

    RESULTS: Twenty-two out of 62 patients eventually gained ICU admission. Mean time from intubation to ICU entry and mean length of ICU stay were 48 h (0 to 312) and 10 days (1 to 33), respectively. Survival for patients admitted to ICU compared to ventilation in the acute surgery wards was 54.5% (12/22) vs 17.5% (7/40). Thirty-four patients underwent surgery, and the majority were bowel-related emergency operations. SAPS2 score validation revealed AUC of 0.701. More than half of patients with mortality risk 

    Matched MeSH terms: Retrospective Studies
  16. Diana K, Teh MS, Islam T, Lim WL, Beh ZY, Taib NAM
    World J Surg, 2023 Mar;47(3):564-572.
    PMID: 36599951 DOI: 10.1007/s00268-022-06881-7
    INTRODUCTION: Regional analgesia techniques have been increasingly used for post-operative pain management following mastectomy. We aim to evaluate analgesic benefits of pectoral nerve (PECS2) block incorporated as part of the enhanced recovery after surgery (ERAS) protocol in patients undergoing mastectomy in University Malaya Medical Centre, Malaysia.

    MATERIAL AND METHODS: A single centre, cohort study evaluating 335 women who have undergone unilateral mastectomy between January 2017 and March 2020 in Malaysia. Regional anaesthesia were given pre-operatively via ultrasound guided pectoral and intercostal nerves block (PECSII).

    RESULTS: Utilization of regional anaesthesia increased from 11% in 2017 to 43% in 2020. Types and duration of surgeries were comparable. Opiod consumption was 3 mg lower in those who had PECS2 block ((27 [24-30] mg), in comparison with those who received general anaesthesia only (30 [26-34] mg), p 

    Matched MeSH terms: Retrospective Studies
  17. Lee CJ, Lai LL, See MH, Velayuthan RD, Doon YK, Lim PE, et al.
    World J Surg, 2023 Nov;47(11):2743-2752.
    PMID: 37491402 DOI: 10.1007/s00268-023-07108-z
    BACKGROUND: In recent years, the increase in antibiotics usage locally has led to a worrying emergence of multi-drug resistant organisms (MDRO), with the Malaysian prevalence rate of methicillin-resistant Staphylococcus aureus (MRSA) ranging from 17.2 to 28.1% between 1999 and 2017. A study has shown that 7% of all non-lactational breast abscesses are caused by MRSA. Although aspiration offers less morbidities compared to surgical drainage, about 20% of women infected by MRSA who initially underwent aspiration subsequently require surgical drainage. This study is conducted to determine the link between aetiology, antimicrobial resistance pattern and treatment modalities of breast abscesses.

    METHODS: Retrospective study of reviewing microbiology specimens of breast abscess patients treated at Universiti Malaya Medical Centre from 2015 to 2020. Data collected from microbiology database and electronic medical records were analysed using SPSS V21.

    RESULT: A total of 210 specimens from 153 patients were analysed. One-fifth (19.5%) of the specimens isolated were MDRO. Lactational associated infections had the largest proportion of MDR in comparison to non-lactational and secondary infections (38.5%, 21.7%, 25.7%, respectively; p = 0.23). Staphylococcus epidermidis recorded the highest number of MDR (n = 12) followed by S. aureus (n = 8). Adjusted by aetiological groups, the presence of MDRO is linked to failure of single aspirations (p = 0.554) and significantly doubled the risk of undergoing surgical drainage for resolution (p = 0.041).

    CONCLUSION: MDR in breast abscess should be recognised as an increasing healthcare burden due to a paradigm shift of MDRO and a rise of resistance cases among lactational associated infection that were vulnerable to undergo surgical incision and drainage for resolution.

    Matched MeSH terms: Retrospective Studies
  18. Low CS, Ho JJ, Nallusamy R
    World J Pediatr, 2016 Nov;12(4):450-454.
    PMID: 27286688 DOI: 10.1007/s12519-016-0037-7
    BACKGROUND: Most of the evidence on early feeding of preterm infants was derived from high income settings, it is equally important to evaluate whether it can be successfully implemented into less resourced settings. This study aimed to compare growth and feeding of preterm infants before and after the introduction of a new aggressive feeding policy in Penang Hospital, a tertiary referral hospital in a middle income country.

    METHODS: The new aggressive feeding policy was developed mainly from Cochrane review evidence, using early parenteral and enteral nutrition with standardized breastfeeding counselling aimed at empowering mothers to provide early expressed milk. A total of 80 preterm babies (34 weeks and below) discharged from NICU were included (40 pre- and 40 post-intervention). Pre and post-intervention data were compared. The primary outcome was growth at day 7, 14, 21 and at discharge and secondary outcomes were time to full oral feeding, breastfeeding rates, and adverse events.

    RESULTS: Complete data were available for all babies to discharge. One baby was discharged prior to day 14 and 10 babies before day 21, so growth data for these babies were unavailable. Baseline data were similar in the two groups. There was no significant weight difference at 7, 14, 21 days and at discharge. More post-intervention babies were breastfed at discharge than pre-intervention babies (21 vs. 8, P=0.005). Nosocomial infection (11 vs. 4, P=0.045), and blood transfusion were significantly lower in the postintervention babies than in the pre-intervention babies (31 vs. 13, P=0.01). The post-intervention babies were more likely to achieve shorter median days (interquartile range) to full oral feeding [11 (6) days vs. 13 (11) days, P=0.058] and with lower number affecting necrotising enterocolitis (0 vs. 5, P=0.055).

    CONCLUSION: Early aggressive parenteral nutrition and early provision of mother's milk did not result in improved growth as evidenced by weight gain at discharge. However we found more breastfeeding babies, lower nosocomial infection and transfusion rates. Our findings suggest that implementing a more aggressive feeding policy supported by high level scientific evidence is able to improve important outcomes.
    Matched MeSH terms: Retrospective Studies
  19. Alenezi SA, Dannoon SF, Alnafisi NS, Asa'ad SM, Osman MM, Elgazzar AH
    World J Nucl Med, 2020 01 14;19(1):41-46.
    PMID: 32190021 DOI: 10.4103/wjnm.WJNM_16_19
    The aim of this study is to investigate the relationship between brown adipose tissue (BAT) activation and myocardial fluorine-18-fluorodeoxyglucose ([18F] FDG) uptake in terms of intensity and patterns. The patients were divided into two groups as follows: BAT and control groups. The BAT group consists of 34 cases that showed BAT uptake. The control group, with no BAT uptake, included 68 patients who were matched for body mass index, gender, and season. The scans were retrospectively reviewed by two nuclear medicine physicians who visually evaluated the intensity of myocardial [18F] FDG uptake. The myocardial [18F] FDG uptake was visually classified into the following three patterns: diffuse, heterogeneous, and focal. The regions of activated BAT distribution were noted. The mean myocardial [18F] FDG uptake was 2.50 ± 0.75 for the BAT group and 2.13 ± 0.88 for the control group with a statistically significant difference (P = 0.031). The myocardial [18F] FDG uptake pattern was similar in the BAT and control groups with the diffuse pattern being the most common, followed by the heterogeneous and less commonly focal. In the BAT group, the anatomical distribution of BAT was mainly in supraclavicular, paravertebral, and axillary and to a lesser extent in cervical regions. BAT group had a significantly higher intensity of [18F] FDG myocardial uptake compared to that of the control group. The presence of activated BAT did not affect the pattern of myocardial uptake. Knowledge of these findings may help in understanding the variability of myocardial [18F] FDG uptake and consequently in avoiding misinterpretation of cardiac findings in positron-emission tomography/computed tomography studies.
    Matched MeSH terms: Retrospective Studies
  20. Yusoff AR, Razak MM, Yoong BK, Vijeyasingam R, Siti ZM
    World J Gastroenterol, 2012 Feb 7;18(5):458-65.
    PMID: 22346252 DOI: 10.3748/wjg.v18.i5.458
    To investigate the clinical features and survival of patients treated for cholangiocarcinoma in our institution and to analyze the factors affecting their survival.
    Matched MeSH terms: Retrospective Studies
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