MyMedR

Treatment of chronic urticaria with thyroxine in an euthyroid patient with thyroglobulin and microsomal antibodies

Koh CK, Hew FL, Chiu CL

Ann Acad Med Singap, 2000 Jul;29(4):528-30.

INTRODUCTION: The association of chronic urticaria and thyroid autoimmunity is not well recognised and the potential use of thyroxine in the treatment of chronic urticaria in patients with thyroid autoimmunity is even less well known.

CLINICAL PICTURE: We report a case of chronic urticaria in an euthyroid patient with evidence of significantly elevated levels of thyroglobulin and microsomal antibodies.

TREATMENT AND OUTCOME: Treatment with thyroxine has brought about clinical remission of the chronic urticaria but no change in the thyroid antibody levels could be demonstrated.

CONCLUSION: Patients with chronic urticaria should be screened for evidence of thyroid autoimmunity. A closely monitored trial of thyroxine therapy for those who have thyroid autoimmunity can be rewarding.

Effect of rocuronium compared with succinylcholine on intraocular pressure during rapid sequence induction of anaesthesia

Chiu CL, Jaais F, Wang CY

Br J Anaesth, 1999 May;82(5):757-60.

PMID: 10536557

We have compared the effect of rocuronium and succinylcholine on intraocular pressure (IOP) during rapid sequence induction of anaesthesia using propofol and fentanyl, in a randomized double-blind study. We studied 30 adult patients, allocated to one of two groups. Anaesthesia was induced with fentanyl 2 micrograms kg-1 and propofol until loss of verbal response. This was followed by succinylcholine 1.5 mg kg-1 (group S; n = 15) or rocuronium 0.9 mg kg-1 (group R; n = 15). Laryngoscopy was performed 60 s later. IOP, mean arterial pressure (MAP) and heart rate (HR) were measured before induction, immediately before intubation and every minute after intubation for 5 min. A Keeler Pulsair air impulse tonometer was used to measure IOP and the mean of two readings obtained in the right eye at each measurement time was recorded. Intubating conditions were evaluated according to a simple scoring system. IOP in the succinylcholine group was significantly greater than that in the rocuronium group (mean 21.6 (SEM 1.4) mm Hg vs 13.3 (1.4) mm Hg; P < 0.001). Intubating conditions were equally good in both groups. We conclude that with rapid sequence induction of anaesthesia using propofol and fentanyl, rocuronium did not cause as great an increase in IOP as succinylcholine and may be an alternative in open eye injury cases.

The effect of prophylactic metaraminol on systemic hypotension caused by induction of anaesthesia with propofol in patients over 55 years old

Chiu CL, Tew GP, Wang CY

Anaesthesia, 2001 Sep;56(9):893-7.

PMID: 11531679

We conducted a double-blind, randomised, placebo-controlled study evaluating the efficacy of prophylactic metaraminol for preventing propofol-induced hypotension. Thirty patients aged 55-75 years undergoing general anaesthesia were randomly allocated to receive either metaraminol 0.5 mg or saline before administration of fentanyl 1 microg.kg(-1) and propofol 2 mg.kg(-1). Induction of anaesthesia was associated with a decrease in mean and systolic arterial pressure in both groups (p = 0.0001). However, there was no significant difference between the two groups. These results show that prophylactic use of metaraminol 0.5 mg does not prevent the decrease in blood pressure following fentanyl and propofol induction in older patients.

Fulltext Effect of exposure to dust on lung function of cement factory workers

Noor H, Yap CL, Zolkepli O, Faridah M

Med J Malaysia, 2000 Mar;55(1):51-7.

PMID: 11072491 MyJurnal

Exposure to Portland cement dust has long been associated with the prevalence of respiratory symptoms and varying degrees of airway obstruction in man. Apart from respiratory diseases, it was also found to be the cause of lung and laryngeal cancer, gastrointestinal tumours and also dermatitis. This study was done to investigate the effect of dust exposure on ventilatory lung function of Portland cement factory workers in Rawang, Selangor. Spirometry tests of 62 male workers (exposed to total dust concentration of 10,180 micrograms/m3 and PM10 of 8049 micrograms/m3) and 70 subjects from UPM (exposed to mean total dust of 192 micrograms/m3 and PM10 of 177 micrograms/m3--controls) revealed significant differences in spirometry values between the groups. The workers showed i) significantly lower FEV1% and FEF25-75%, and higher FMFT, ii) reduced FEV1% with increasing level of dust exposure and iii) higher prevalence of respiratory symptoms. Therefore, we suggest that exposure to dust in the cement factory leads to higher incidence of respiratory symptoms and impaired lung function.

Fulltext Radical resection for naso-lacrimal duct tumour

Vickers PG, Shue CL, Ahmad H

Med J Malaysia, 1999 Jun;54(2):277-9.

PMID: 10972044

Naso-lacrimal duct tumours are uncommon and present with epiphora and swelling. Since the naso-lacrimal duct is embedded in bone for the majority of its anatomical length, the late presentation of proptosis is due to orbital extension of the tumour. Radical surgical treatment is necessary to establish clear margins and facilitate reconstruction.

Physical properties of Malaysian cocoa butter as affected by addition of milkfat and cocoa butter equivalent

Sabariah S, Ali AR, Chong CL

Int J Food Sci Nutr, 1998 May;49(3):211-8.

PMID: 10616663

Commercial samples of Malaysian cocoa butter (MCB), anhydrous milkfat (AMF), high melting fraction milkfat42 (HMF42) and cocoa butter equivalent (CBE) were blended in binary and ternary blends. All the fats were then evaluated for their solid fat content, thermal analyses and polymorphic stability. MCB possessed the highest solid followed by CBE, HMF42 and AMF. Data on thermal analyses showed that eutectic interaction was more noticeable when AMF and HMF42 were present in the MCB and CBE system. Moreover, X-ray diffraction patterns also showed that AMF and HMF42 exhibit the presence of beta' polymorph while MCB and CBE exhibit beta polymorph.

Ovarian failure in oral cyclophosphamide treatment for systemic lupus erythematosus

Wang CL, Wang F, Bosco JJ

Lupus, 1995 Feb;4(1):11-4.

PMID: 7767332 DOI: 10.1177/096120339500400103

Ninety-two women with systemic lupus erythematosus treated with oral cyclophosphamide were studied to ascertain the prevalence and the factors associated with ovarian dysfunction. Menstrual disturbance during treatment occurred in 55% of patients: 36% had amenorrhoea and 19% had oligomenorrhoea. Sustained oligomenorrhoea occurred in 12% patients. Permanent amenorrhoea (> 12 months) after cessation of oral cyclophosphamide occurred in 27% of patients. Hormonal studies in these patients were consistent with ovarian failure. Older age at initiation of treatment and high cumulative dose of cyclophosphamide were found to be associated with this outcome. There was a trend towards linear relationship between the age of initiation of cyclophosphamide therapy and frequency of amenorrhoea. A statistically significant association between amenorrhoea and cumulative dose of cyclophosphamide after adjustment for age was found whereas no such association was linked to the duration of treatment. Fourteen of the 23 women who wished to become pregnant after cessation of treatment conceived resulting in 20 live births and two abortions.

Comparative analysis of NS3 sequences of temporally separated dengue 3 virus strains isolated from southeast Asia

Chow VT, Seah CL, Chan YC

Intervirology, 1994;37(5):252-8.

PMID: 7698880

By a combination of PCR and direct-cycle sequencing using consensus primers, we analyzed approximately 400-bp fragments within the NS3 genes of twenty-one dengue virus type 3 strains isolated from five neighboring Southeast Asian countries at different time intervals from 1956 to 1992. The majority of base disparities were silent mutations, with few predicted amino acid substitutions, thus emphasizing the strict conservation of the NS3 gene. Phylogenetic trees constructed on the basis of these nucleotide differences revealed distinct but related clusters of strains from the Philippines, Indonesia, and strains from Singapore and Malaysia of the 1970s and early 1980s, while the Thai cluster was relatively more distant. This genetic relationship was compatible with that proposed by other workers who have studied other dengue 3 virus genes such as E, M and prM. However, we observed that the more recent, epidemic-associated dengue 3 strains from Singapore and Malaysia of the late 1980s and early 1990s were more closely related to the Thai cluster, implying their evolution from the latter, and emphasizing the importance of viral spread via increasing travel within the Southeast Asian area and elsewhere. Nucleotide sequence analysis of the NS3 genes of dengue viruses can serve to advance the understanding of the epidemiology and evolution of these viruses.

Genetic variation among Malaysian isolates of Salmonella typhi as detected by ribosomal RNA gene restriction patterns

Pang T, Altwegg M, Martinetti G, Koh CL, Puthucheary S

Microbiol. Immunol., 1992;36(5):539-43.

PMID: 1513268

Genetic variation among Malaysian isolates of Salmonella typhi was determined by analysis of ribosomal RNA gene restriction patterns. Of the 20 isolates analyzed, eight different pattern combinations were detected. The amount of variation observed was also dependent upon the restriction endonuclease used; PstI produced more different patterns than did SmaI. The results suggested that disease activity was due to a number of different clones circulating simultaneously rather than a single strain. Further implications of the data are discussed.

ras gene mutations in Malaysian leukemia patients

Chin IY, Koh CL, Bosco JJ

Acta Haematol., 1992;87(1-2):107-8.

PMID: 1585764

Molecular epidemiology of Malaysian dengue 2 viruses isolated over twenty-five years (1968-1993)

Fong MY, Koh CL, Lam SK

Res. Virol., 1998 Nov-Dec;149(6):457-64.

PMID: 9923022

The limited sequencing approach was used to study the molecular epidemiology of 24 Malaysian dengue 2 viruses which were isolated between 1968 and 1993. The sequences of a 240-nucleotide-long region across the envelope/non-structural 1 protein (E/NS1) gene junction of the isolates were determined and analysed. Alignment and comparison of the nucleotide and deduced amino acid sequences of the isolates revealed that nucleotide changes occurred mostly at the third position of a particular codon and were of the transition (AG, CU) type. Five nucleotide changes resulted in amino acid substitutions. Pairwise comparisons of the nucleotide sequences gave divergence values ranging from 0 to 9.2%. At the amino acid level, the divergence ranged between 0 and 3.8%. Based on the 6% divergence as the cut-off point for genotypic classification, the isolates were grouped into two genotypes, I and II. Comparison of the nucleotide sequences of the Malaysian dengue isolates with those of the dengue viruses of other regions of the world revealed that members of genotypes I and II were closely related to viruses from the Indian Ocean and Western Pacific regions, respectively.

Systemic lupus erythematosus in Malaysia: a study of 539 patients and comparison of prevalence and disease expression in different racial and gender groups

Wang F, Wang CL, Tan CT, Manivasagar M

Lupus, 1997;6(3):248-53.

PMID: 9104731 DOI: 10.1177/096120339700600306

The aims of this study were to examine the clinical and laboratory features of Malaysian patients with systemic lupus erythematosus (SLE) and to identify any difference in disease expression between the different genders and among the three major ethnic groups of Malaysia. Retrospective analysis of all patients with SLE admitted to and followed-up at University Hospital Kuala Lumpur from 1974-90 was undertaken. Ethnic Chinese had the highest prevalence of SLE compared to other ethnic groups. There was a high incidence of renal disease, 74% of patient had significant proteinuria and half of these had associated nephrotic syndrome. Indian patients had significantly less incidence of skin manifestation compared to other racial groups. No difference in disease expression was detected between the ethnic Chinese and Indians and between the male and female patients. The overall 5 y and 10 y survival rates were 82% and 70% respectively. Indian patients had the poorest survival rates. Survival rates are similar among the Chinese and Malay patients. Our findings are in broad agreement with those previously reported.

Fulltext Bladder outflow obstruction masquerading as pelviureteric junction (PUJ) obstruction

Teh CL, Lei CC, Khairullah A

Med J Malaysia, 1996 Mar;51(1):156-8.

PMID: 10968001

We report a case of bladder outflow obstruction presenting with upper tract dilatation mistaken initially as pelviureteric junction (PUJ) obstruction. The lower tract obstruction ought to be dealt with first before upper tract obstruction is assessed because the renal pelvic pressure is significantly affected by vesical filling and high bladder pressure.

Fulltext Breakpoint cluster region (BCR) gene rearrangement studies in chronic myeloid and acute lymphoblastic leukemias

Chin YM, Bosco JJ, Koh CL

Med J Malaysia, 1992 Jun;47(2):110-3.

PMID: 1494330

Deoxyribonucleic acid (DNA) of twenty chronic myeloid leukemia (CML) and thirty acute lymphoblastic leukemia (ALL) patients were analysed by Southern hybridization. The DNA was digested with BglII and hybridized with a 4.5-kilobase (kb) ph1/bcr-3 DNA probe. All the 20 CML patients showed gene rearrangement within a 5.8-kb segment (the major breakpoint cluster region, M-bcr) of the breakpoint cluster region (bcr) gene of chromosome 22, indicating the presence of the Philadelphia chromosome. M-bcr rearrangement at the bcr gene of chromosome twenty-two was not detected in all the thirty ALL patients (nine adults and twenty-one children) and two normal controls.

Fulltext Acute appendicitis presenting as melaena

Tham KC, Kok CL, Hein T

Med J Malaysia, 1992 Jun;47(2):154.

PMID: 1494337

Fulltext Endotracheal tube ignition during CO2 laser surgery of the larynx

Chiu CL, Khanijow V, Ong G, Delilkan AE

Med J Malaysia, 1997 Mar;52(1):82-3.

PMID: 10968058

We report a case of endotracheal tube fire occurring during CO2 laser surgery of the larynx. The ignition of an endotracheal tube was thought to be caused by laser penetration of an unprotected portion of the tube during resection of vocal cord tumour. Fire hazard is inevitable when a laser is used in the path of combustible gases and in the presence of flammable objects. We discuss the methods of prevention that were used.

Fulltext Western impressions of the Hong Kong health care system

Bennett CL, Pei GK, Ultmann JE

West. J. Med., 1996 Jul-Aug;165(1-2):37-42.

PMID: 8855683

Hong Kong, Taiwan, Singapore, and Malaysia are initiating health care reform to meet the changing demands of populations with improved socioeconomic status and access to modern technologies and who are living longer than in previous generations. Hong Kong, in particular, is facing a unique set of circumstances as its people prepare for the transition in 1997 from a British colony to a Special Administrative Region of China. While spending only 4% of its gross domestic product on health care, it has a large and regulated public hospital system for most inpatient medical care and a separate, loosely regulated private health care system for most outpatient medical care. In 1993 the Secretary for Health and Welfare of Hong Kong initiated a year-long process to debate the pros and cons of 5 fundamental programs for health care reform. After a year of open consultation, options were chosen. We describe the Hong Kong health care system, the fundamental changes that have been adopted, and lessons for reformers in the United States.

Plasmid incidence rate and conjugative chloramphenicol and tetracycline resistance plasmids in Malaysian isolates of Salmonella typhi

Phipps M, Pang T, Koh CL, Puthucheary S

Microbiol. Immunol., 1991;35(2):157-61.

PMID: 1886492

Seven (6.1%) of 115 strains of Salmonella typhi isolated from Malaysian patients harbored a single large plasmid of 71 to 166 mD. Two of the seven plasmid-bearing strains were resistant to chloramphenicol (Cm) and tetracycline (Tc) and they transferred Cm and Tc resistance traits to Escherichia coli K12 at frequencies from 1.6 x 10(-7) to 1.9 x 10(-6). Agarose gel electrophoresis provided evidence that the resistance traits were cotransferred on a conjugative plasmid. The significance and importance of these results are discussed.

Plasmid profiles of Neisseria gonorrhoeae in Peninsular Malaysia

Kalaimathee KK, Koh CL, Ngeow YF

Microbiol. Immunol., 1985;29(10):921-6.

PMID: 3935906

The plasmid profiles of 160 strains of Neisseria gonorrhoeae isolated in Peninsular Malaysia, comprising 80 penicillinase-producing (PPNG) and 80 non-penicillinase-producing (non-PPNG) isolates, were determined. The 80 PPNG isolates were divided into two plasmid groups. All of them harbored two common plasmid species, a 4.4 megadalton (Md) R plasmid previously associated with beta-lactamase production in PPNG strains from the Far East and a 2.6 Md multicopy plasmid of unknown function. In addition to these two plasmids, 60 (75%) PPNG isolates also carried a large 24.5 Md conjugative plasmid. In contrast, the 80 non-PPNG strains were divided into three plasmid groups. All of them possessed the 2.6 Md cryptic plasmid, and 35 (44%) isolates also harbored the 24.5 Md transfer plasmid. Besides these two plasmids, one non-PPNG isolate carried an additional 7.8 Md cryptic plasmid.

Fulltext Nucleotide and encoded amino acid sequences of the membrane protein precursor and the membrane protein genes of three dengue-2 viruses isolated in Malaysia from patients with dengue haemorrhagic fever, dengue shock syndrome or dengue fever

Samuel S, Koh CL, Pang T, Lam SK

Nucleic Acids Res, 1990 Apr 11;18(7):1905.

PMID: 2336374 DOI: 10.1093/nar/18.7.1905

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