Displaying publications 1 - 20 of 92 in total

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  1. Tan HM, Cheung HS
    Med J Malaysia, 1990 Jun;45(2):118-22.
    PMID: 2152015
    Sixty eight consecutive cases of percutaneous renal surgery, percutaneous nephrolithotripsy (PCNL), were performed on 64 patients (male-41, female-23) at the Subang Jaya Medical Centre from April 1988 to July 1989. All the cases were done as a one stage procedure. Fifty eight stones were large renal or staghorn and ten were ureteric. Thirty cases (41%) were stone free after PCNL alone. Thirty eight cases had residual fragments needing extracorporeal shockwave lithotripsy (ESWL). Mean operating time was 109.6 +/- 36.0 minutes. Mean hospital stay was 4.5 +/- 1.8 days. At three months follow-up, 86% of the cases were stone free. The remaining had residual sand (less than 3mm). Minor complications occurred in six patients. None required major surgical intervention post PCNL.
    Matched MeSH terms: Kidney Calculi/surgery*; Kidney Calculi/therapy; Ureteral Calculi/surgery*; Ureteral Calculi/therapy
  2. Tan HM, Cheung HS
    Med J Malaysia, 1990 Jun;45(2):113-7.
    PMID: 2152014
    Three hundred and ninety five cases in 358 consecutive patients (male-232, female-126) with renal and ureteric stones were treated with extracorporeal shockwave lithotripsy (ESWL) from March to November 1988. They either had ESWL alone, or in combination with stone manipulation or debulking percutaneous nephrolithotripsy (PCNL). Seventy five percent of the stones were found in the pelvicalyceal system and 25% in the ureter. Seventy-six percent of the stones were less than 25mm size. Two hundred and ninety (79%) cases were followed up to three months. Two hundred and forty nine (85.9%) cases were stone free and 36 (12.4%) had residual sand less than 3mm size. Five (1.7%) cases failed to fragment with ESWL monotherapy and were salvaged by either percutaneous or ureteroscopic intervention. None of the cases required any open surgery intervention.
    Matched MeSH terms: Kidney Calculi/therapy*; Ureteral Calculi/therapy*
  3. Highet HC
    Matched MeSH terms: Calculi
  4. Jasim Mohammed M, Ibrahim RW, Ahmad MZ
    Saudi J Biol Sci, 2017 Mar;24(3):737-740.
    PMID: 28386204 DOI: 10.1016/j.sjbs.2017.01.050
    In this paper, we consider a low initial population model. Our aim is to study the periodicity computation of this model by using neutral differential equations, which are recognized in various studies including biology. We generalize the neutral Rayleigh equation for the third-order by exploiting the model of fractional calculus, in particular the Riemann-Liouville differential operator. We establish the existence and uniqueness of a periodic computational outcome. The technique depends on the continuation theorem of the coincidence degree theory. Besides, an example is presented to demonstrate the finding.
    Matched MeSH terms: Calculi
  5. Law YXT, Shen L, Khor VWS, Chen W, Chen WJK, Durai P, et al.
    Int J Urol, 2022 Dec;29(12):1488-1496.
    PMID: 36070249 DOI: 10.1111/iju.15023
    OBJECTIVES: To identify predictive factors for the development of sepsis/septic shock postdecompression of calculi-related ureteric obstruction using the Sequential Organ Failure Assessment (SOFA) score and to compare clinical outcomes and odd risk ratios of patients developing sepsis/septic shock following the insertion of percutaneous nephrostomy (PCN) versus insertion of retrograde ureteral stenting (RUS).

    METHODS: Clinico-epidemiological data of patients who underwent PCN and/or RUS in two institutions for calculi-related ureteric obstruction were retrospectively collected from January 2014 to December 2020.

    RESULTS: 537 patients (244 patients in PCN group, 293 patients in RUS group) from both institutions were eligible for analysis based on inclusion and exclusion criteria. Patients with PCN were generally older, had poorer Eastern Cooperative Oncology Group status, and larger obstructive ureteral calculi compared to patients with RUS. Patients with PCN had longer durations of fever, the persistence of elevated total white cell and creatinine, and longer hospitalization stays compared with patients who had undergone RUS. RUS up-front has more unsuccessful interventions compared with PCN. There were no significant differences in the change in SOFA score postintervention between the two interventions. In multivariate analysis, the higher temperature just prior to the intervention (adjusted odds ratio [OR]: 2.039, p = 0.003) and Cardiovascular SOFA score of 1 (adjusted OR:4.037, p = 0.012) were significant independent prognostic factors for the development of septic shock postdecompression of ureteral obstruction.

    CONCLUSIONS: Our study reveals that both interventions have similar overall risk of urosepsis, septic shock and mortality rate. Despite a marginally higher risk of failure, RUS should be considered in patients with lower procedural risk. Patients going for PCN should be counseled for a longer stay. Post-HDU/-ICU monitoring, inotrope support postdecompression should be considered for patients with elevated temperature within 1 h preintervention and cardiovascular SOFA score of 1.

    Matched MeSH terms: Ureteral Calculi*
  6. Hong YH, Dublin N, Razack AH, Mohd MA, Husain R
    Urology, 2012 Sep;80(3):529-34.
    PMID: 22578827 DOI: 10.1016/j.urology.2012.02.053
    To investigate the urinary metabolic excretion pattern among local stone formers given the great differences in the intrinsic and extrinsic risk factors as well as the urinary metabolic excretions compared with other populations.
    Matched MeSH terms: Urinary Calculi/metabolism; Urinary Calculi/urine*
  7. Mahamooth Z
    Med J Malaysia, 1987 Sep;42(3):191-5.
    PMID: 3506643
    Retrograde ureteroscopy, using the 12.5 French Storsz Perez-Castro Ellendt operating ureteroscope provides excellent visual access to the whole of the ureteric lumen in most instances. A total of 41 ureteroscopies were performed on a similar number of patients over a period of 12 months since April 1986. Majority of them were for ureteric calculi. Success rate for patients with ureteric calculi below the pelvic brim was 77.4%. A lower success was noted for calculi above the pelvic brim (50%). Retrograde ureteroscopy will eventually make blind basketing of lower ureteric stones an unnecessarily risky procedure and perhaps even obsolete. Ureterolithotomy nevertheless will still have a place in the management of stones that cannot be extracted either due to acute bullous oedema of the ureteric mucosa or in previously explored rigid non-yielding ureters not suitable for ureteroscopy.
    Matched MeSH terms: Ureteral Calculi/diagnosis; Ureteral Calculi/therapy*
  8. Park J, Lee SB, Cho SY, Jeong CW, Son H, Park YH, et al.
    Urol J, 2016 Aug 25;13(4):2759-64.
    PMID: 27576882
    PURPOSE: To evaluate the utility and safety of laparoendoscopic single-site surgery (LESS) in comparison with conventional laparoscopic (CL) surgery for the treatment of upper urinary tract stones.

    MATERIAL AND METHODS: Between June 2011 and May 2012, 20 patients with upper urinary tract stones were included in this prospective randomized study. The patients were assigned into the LESS group or CL group in a one-on-one manner using a random table. The clinical parameters were evaluated in the immediate postoperative period, and the stone clearance rate was evaluated via non-contrast computer tomography at one month postoperatively.

    RESULTS: There were no significant differences in patient demographics or preoperative stone sizes between the two groups. The perioperative parameters, including operative time, estimated blood loss, postoperative pain scores, length of hospital stay, and changes in renal function, were comparable. No transfusions or open conversions were required in either group. The incidence of residual stones was lower in the LESS group (1 case) than in the CL group (2 cases). However, this difference was not statistically significant.

    CONCLUSIONS: For large and impacted upper ureteral stones, the effectiveness and safety of LESS were equivalent to those of CL. Further randomized control trials with larger sample sizes are needed to strengthen the conclusions of this study.&nbsp.

    Matched MeSH terms: Kidney Calculi/surgery*; Ureteral Calculi/surgery*
  9. Muhamad S, Sowtali SN, Arifin SRM, Islah MAR, Mohd Shukri NA
    J Hum Nutr Diet, 2023 Oct;36(5):2060-2072.
    PMID: 37515409 DOI: 10.1111/jhn.13215
    BACKGROUND: Dietary habit is one of the most important methods to prevent and treat urinary stones. However, only limited evidence of the experiences of dietary management among urinary stone patients in Malaysia is available. This study aimed to explore participants' current dietary practices after the diagnosis of urinary stones and to identify the factors that facilitate their dietary changes.

    METHODS: A qualitative study with purposive sampling was conducted using face-to-face semistructured interviews. A total of 20 participants from a tertiary general hospital in Kuantan, Malaysia, were recruited in this study. Data were analysed using framework analysis.

    RESULTS: Two themes emerged from the analysis. The first theme explained the changes in the dietary practice of the participants postdiagnosis. The second theme revealed that the participants' dietary changes were greatly influenced by personal factors and external support from professionals, family and peers.

    CONCLUSIONS: Urinary stone patients highlighted the fear of complications, self-determination and knowledge of nutrition as the main drivers of their dietary change postdiagnosis. Emphasising proper nutritional care by assessing and evaluating dietary self-management among patients can facilitate effective self-care in stone prevention management.

    Matched MeSH terms: Urinary Calculi*
  10. Taguchi K, Cho SY, Ng AC, Usawachintachit M, Tan YK, Deng YL, et al.
    Int J Urol, 2019 07;26(7):688-709.
    PMID: 31016804 DOI: 10.1111/iju.13957
    The Urological Association of Asia, consisting of 25 member associations and one affiliated member since its foundation in 1990, has planned to develop Asian guidelines for all urological fields. The field of stone diseases is the third of its guideline projects. Because of the different climates, and social, economic and ethnic environments, the clinical practice for urinary stone diseases widely varies among the Asian countries. The committee members of the Urological Association of Asia on the clinical guidelines for urinary stone disease carried out a surveillance study to better understand the diversity of the treatment strategy among different regions and subsequent systematic literature review through PubMed and MEDLINE database between 1966 and 2017. Levels of evidence and grades of recommendation for each management were decided according to the relevant strategy. Each clinical question and answer were thoroughly reviewed and discussed by all committee members and their colleagues, with suggestions from expert representatives of the American Urological Association and European Association of Urology. However, we focused on the pragmatic care of patients and our own evidence throughout Asia, which included recent surgical trends, such as miniaturized percutaneous nephrolithotomy and endoscopic combined intrarenal surgery. This guideline covers all fields of stone diseases, from etiology to recurrence prevention. Here, we present a short summary of the first version of the guideline - consisting 43 clinical questions - and overview its key practical issues.
    Matched MeSH terms: Urinary Calculi/diagnosis*; Urinary Calculi/drug therapy; Urinary Calculi/prevention & control; Urinary Calculi/surgery*
  11. Sharma S, Manchanda V, Gupta R
    Malays J Pathol, 2013 Dec;35(2):181-3.
    PMID: 24362482
    Testicular microlithiasis (TM) is a rare benign condition with presence of multiple small microcalcifications in the seminiferous tubules. Though the aetiology is unknown, TM has been described in association with a variety of urological conditions. We report the clinico-pathological features of a 12-year-old male child who underwent orchidectomy for undescended testis. Histopathological examination of the excised testis showed multiple small intratubular calcifications without any evidence of testicular neoplasia. TM is an unusual phenomenon that should be kept in mind while evaluating testicular biopsies. Though it behaves in a benign manner in most of the cases, patients with positive family history of testicular cancer should be followed-up for testicular tumour.
    Matched MeSH terms: Calculi/complications*; Calculi/pathology*
  12. Kodama H, Ohno Y
    Hinyokika Kiyo, 1989 Jun;35(6):923-34.
    PMID: 2678977
    In this paper, urolithiasis is remarked from the standpoint of descriptive epidemiology, which examines the frequency distribution of a given disease in a population in terms of time, place and personal characteristics with an aim of identifying risk factors or some clues to the etiology. Some descriptive epidemiological features of urolithiasis are summarized. Prevalence rate is around 4% (4-15% in males and 4-8% in females), and incidence rate varies from area to area: 53.2 per 100,000 population in 1975 in Japan, 364 in 1976 in Malaysia, and 540 in 1979 in West Germany. Prevalence and/or incidence rates have, in general, increased in the developed countries since World War II and in the developing countries as well, where upward trends are quite analogous to the trends observed in the nineteenth century in Europe. Recurrence rate, which is much higher in males than in females, ranges from 31% to 75%, depending on the follow-up periods. In the industrialized countries, upper urinary (renal and ureteral) stones account for more than 90% of total stones, which are ordinarily calcium complexes in composition. More common in the developing countries are lower urinary (bladder and urethral) stones, frequently composed of magnesium ammonium phosphate, which indicates a close association with urinary tract infections. Variations in frequency are evident by season and by region within a country. Age and sex differentials in urinary stone formers are substantial: more common in males 30-40 years old in the industrialized countries and in children under 10 years old in the developing countries. Racial differentials are also noted; blacks appear to suffer less frequently than whites. Stone formers experience more frequent episodes of stone formation in their family members, particularly father and brothers, than non-stone formers. These findings on racial differentials and family preponderance suggest the possible relevance of genetic factors in stone formation. Stone formers are more likely to be occupationally sedentary and socially affluent. This observation and differentials by age and sex suggest the probable relevance of lifestyle and environmental factors in stone formation. Epidemiological factors incriminated for stone formation will be discussed in a separate paper.
    Matched MeSH terms: Urinary Calculi/genetics; Urinary Calculi/epidemiology*
  13. Mariappan P, Loong CW
    J Urol, 2004 Mar;171(3):1233.
    PMID: 14767310
    Matched MeSH terms: Urinary Bladder Calculi/complications*; Urinary Bladder Calculi/surgery*
  14. Win T
    Singapore Med J, 1994 Aug;35(4):414-5.
    PMID: 7899907
    This is a case report of a 56-year-old Malay male presenting with a giant urethral calculus. The stone measuring 70 X 50 X 40 mm and weighing 45 g was impacted in the posterior urethra. The giant urethral calculus was removed successfully through external urethrotomy.
    Matched MeSH terms: Urinary Calculi/diagnosis*; Urinary Calculi/surgery
  15. Lee SW, Chaiyakunapruk N, Chong HY, Liong ML
    BJU Int, 2015 Aug;116(2):252-64.
    PMID: 25381743 DOI: 10.1111/bju.12983
    To compare the effectiveness of various treatments used for lower pole renal calculi.
    Matched MeSH terms: Kidney Calculi/surgery*
  16. Salinawati B, Hing EY, Fam XI, Zulfiqar MA
    Med J Malaysia, 2015 Aug;70(4):238-42.
    PMID: 26358021 MyJurnal
    AIM: To determine the (i) sensitivity and specificity of ultrasound (USG) in the detection of urinary tract calculi, (ii) size of renal calculi detected on USG, and (iii) size of renal calculi not seen on USG but detected on computed tomography urogram (CTU).
    METHODS: A total of 201 patients' USG and CTU were compared retrospectively for the presence of calculi. Sensitivity, specificity, accuracy, positive predictive value and negative predictive value of USG were calculated with CTU as the gold standard.
    RESULTS: From the 201 sets of data collected, 59 calculi were detected on both USG and CTU. The sensitivity and specificity of renal calculi detection on USG were 53% and 85% respectively. The mean size of the renal calculus detected on USG was 7.6 mm ± 4.1 mm and the mean size of the renal calculus not visualised on USG but detected on CTU was 4 mm ± 2.4 mm. The sensitivity and specificity of ureteric calculi detection on USG were 12% and 97% respectively. The sensitivity and specificity of urinary bladder calculi detection on USG were 20% and 100% respectively.
    CONCLUSION: This study showed that the accuracy of US in detecting renal, ureteric and urinary bladder calculi were 67%, 80% and 98% respectively.
    Study site: Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur
    Matched MeSH terms: Kidney Calculi*
  17. Ram S, Siar CH, Ismail SM, Prepageran N
    PMID: 15243480
    Tonsilloliths are very rare concretions found in the tonsillar crypt. They are usually single and unilateral, but occasionally may be multiple or bilateral. Small concretions in the tonsils are common, but well formed giant unilateral or bilateral tonsilloliths are extremely uncommon. Only two cases of bilateral tonsilloliths have so far been reported in the literature. A case of unilateral tonsillolith, mimicking bilateral tonsilloliths taken with the orthopantogram (OPT) in a 57-year-old Malaysian Indian female with squamous cell carcinoma of the oral cavity is described. Although the OPT is a reliable and standard panoramic X-ray unit used in dentistry, superimposition of a lesion involving one side of the jaw creates a pseudo or ghost image on the contralateral side leading to a misdiagnosis of bilateral lesions. This report highlights that tonsilloliths, though rare, should be considered in the differential diagnosis of radiopaque masses involving the mandibular ramus, and that investigations such as CT scan or MRI may be required to differentiate pseudo or ghost images from true bilateral pathologies.
    Matched MeSH terms: Calculi/pathology*
  18. Goh LC, Chitra BK, Shaariyah MM, Ng WS
    BMJ Case Rep, 2016 Oct 28;2016.
    PMID: 27793872 DOI: 10.1136/bcr-2016-217514
    Sialolithiasis is among the most common disease affecting the major salivary glands whereby the submandibular gland or its duct is affected in the majority of cases. We report a case of the surgical removal of a giant sialolith along with the submandibular gland using the transcervical approach and its clinical outcome.
    Matched MeSH terms: Salivary Gland Calculi/surgery*
  19. Lim KG, Edward RH, McAll GLG, Thaung M, Wahad NA, Arimainayagam G
    Singapore Med J, 1988 Aug;29(4):353-6.
    PMID: 3249962
    216 patients were found to have had surgery for urinary calculi In a retrospective analysis of surgical records of the two general hospitals in Kelantan over a two year period. Excluding 11 patients from Terengganu and 2 patients resident in Kelantan for less than 1 year, this amounts to an annual incidence for calculus surgery of 10 per 100,000 residents per year. Lower urinary tract (LT) calculi (143) were more common than upper urinary tract (UT) calculi (71). There was an overwhelming majority of males among patients operated on for LT calculi (ratio of males:females = 1.2:1). The mean age of patients with UT calculi was 44 years, while that of LT calculi was 51 years.
    Matched MeSH terms: Urinary Calculi/surgery*
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