The quality of an image generated by a scanning electron microscope is dependent on secondary emission, which is a strong function of surface condition. Thus, empirical formulae and available databases are unable to take into account actual metrology conditions. This paper introduces a simple and reliable measurement technique to measure secondary electron yield (delta) and backscattered electron yield (eta) that is suitable for in-situ measurements on a specimen immediately prior to imaging. The reliability of this technique is validated on a number of homogenous surfaces. The measured electron yields are shown to be within the range of published data and the calculated signal-to-noise ratio compares favourably with that estimated from the image.
The aim of this study was to investigate the attitudes and desire of Malaysian patients for information about anaesthesia and compare the result to that of other similar studies in other countries namely Scotland, Canada, Australia and denMark. Two hundred and forty patients undergoing elective surgery were asked to complete a preoperative quentionnaire examining their desire for information relating to anaesthesia. As in all countries compared, most Malaysian patients were interested to know the time they could start to mobilize from the bed and the time to commence normal oral intake postoperatively. Information related to postoperative pain and pain relief was also highly desired. However, patients showed less interest towards information about perioperative anaesthetic or surgical procedures and drug used. Unlike Australian patients, the Malaysian patients showed less interest about perioperative complications. As in other countries, patients under the age of 50 years had a greater desire for information than those who were older. However there was no difference in desire for information between male and female patients. Patients who have had previous anaesthesia would ask more information compared to those who had none.
We report a case of a 13-year-old girl with an osteosarcoma of the right humerus, which had been diagnosed as an aneurysmal bone cyst at our institution. She underwent curettage and bone grafting of the lesion, which resulted in implantation metastasis of the tumour to the ilium. She died 15 months after presentation owing to pulmonary metastases. This report highlights the possibility of metastasis occurring by direct implantation to a graft donor site. We strongly recommend that a biopsy be performed in cases of presumed benign lesions before proceeding with the definitive surgery.
Phenothiazines have been associated with various ocular adverse effects, in particular cataract and corneal deposits. Several effects are vision threatening. Awareness of these effects, in particular by Psychiatrists and Ophthalmologist, is essential for prompt diagnosis and appropriate treatment. We report two patients presented to us with corneal deposits and lenticular opacities following long term use of Phenothiazines.
The removal of broken implanted intramedullary nails secondary to re-fracture or non-union is challenging. In 12 cases a simple and safe method has been used to remove broken implants.
From March 1986 to June 1992, 100 primary total knee arthroplasties were done in 69 patients. The demographic data and complications were analysed in these 69 patients. The first 50 knees with a minimal follow-up of one year (range 1-6 years) were analysed in more detail according to the International Knee Society Rating System. Detailed radiological evaluation was also carried out to assess positioning of the components. There were 79 knees with osteoarthritis, 20 knees with rheumatoid arthritis and one with Systemic Lupus Erythromatosus (SLE). The knee score was poor in all knees pre-operatively. Post-operatively 78% had good to excellent score and the other 22% had fair knee score. However the functional score remained poor in 50% of the knees. Ideal tibio-femoral alignment was obtained in 68% of the knees. Twenty four percent of the knees had 0.4 degrees of varus and eight percent had 10-12 degrees valgus. Complication rate was low with 1% of infection (one knee). Overall early results were satisfactory.
Study site; University Hospital Kuala Lumpur (University Malaya Medical Centre)
Postoperative deep-vein thrombosis (DVT) is believed to be rare in Asians. We studied 88 consecutive patients in Malaysia who had operations for fracture of the proximal femur or for total hip or knee replacement. No patient had prophylaxis against DVT; bilateral ascending venography was performed between six and ten days after operation. A total of 55 patients (62.5%) showed venographic evidence of DVT. The prevalence was greatest after total knee replacement (76.5%), less after total hip replacement (64.3%) and smallest in the fracture group (50%). One patient developed symptomatic pulmonary embolism. In contrast to other reports from Asia, we found an incidence of postoperative DVT which is similar to that reported in Western populations. This suggests that the present practice of withholding routine prophylaxis against thromboembolism in Asian patients undergoing high-risk orthopaedic procedures should be reconsidered.
With the increase in the number of orthopaedic surgeons and the aggressive marketing by manufacturing companies, high technology orthopaedic surgery is being more frequently carried out in Malaysia. Post-operative sepsis complicating this type of surgery can have disastrous consequences. No data is available in this country on the incidence of post-operative infection in Orthopaedic Surgery. The aim of this study was to determine the incidence of post-operative infection. A retrospective survey of 703 patients undergoing elective Orthopaedic Surgery in the year 1991 was carried out. We found an overall post-operative infection rate of 6.8% and a deep infection rate of 3.3%. This figure of 3.3% is higher than the internationally accepted figure of less than 2%. A need for ongoing surveillance and concerned effort to reduce the infection rate is stressed.
A 31 year old Chinese man developed the nephrotic syndrome, and wasfound to have some of the clinical features of renal vein thrombosis such as a rapid deterioration in renal function and great variability in proteinuria. Radiological studies confirmed the diagnosis of bilateral renal vein thrombosis. The clinical features and pathogenesis of renal vein thrombosis are discussed.
There is evidence to show that paraquat poisoning is alarmingly common in Malaysia. This paper reviews 30 cases of paraquat poisoning seen at the General Hospital, Kuala Lumpur from 1978 to 1979 inclusive. Preventive measures and management are discussed. It is felt that tighter legislation to control its use in agriculture should be implemented now.
226 peritoneal dialyses were performed on 100 patients. 28 patients presented with acute renal failure. Uraemia was the most frequent indication for dialysis. Peritonitis was an important complication and Acinetobacter species accounted for 51.5% of the positive cultures. Other complications included poor dialysate drainage and hypokalemia. Mortality was mainly due to causes unrelated to peritoneal dialysis.
We describe the design and management of a 35 mm slide database using a menu-driven dBASE III PLUS programme and a microcomputer in a large department of pathology that also caters for the individual pathologist. Existing systems described in the literature are geared towards slides of general medicine and do not address the needs of the individual pathologist. A total of 11,481 slides in the Department of Pathology, Faculty of Medicine, University of Malaya, were filed into a single database with each record representing one slide. Nine fields which comprised the slide accession number, reference number, slide category, SNOMED codes, and a description of the slide in natural language, seemed adequate for slide definition. The menu-driven programme had functions which included the abilities to add, delete, edit and back-up records, and to search for desired slides. Although slides may be searched for in various fields, we found that searches using natural language alone were both comprehensive and efficient, provided a standard format of description was adhered to and data entries scrutinized carefully for errors. We believe therefore, that for the pathologist working alone, coded language fields are not absolutely necessary, as manual coding and additional data entry can be time consuming. As expected, for databases larger than 10,000 slides, a 80286 microprocessor-based microcomputer was more efficient. We are of the opinion that a system such as ours is very useful for a large department of pathology or the individual pathologist to file and retrieve 35 mm slides.
Rhinosporidiosis is a chronic granulomatous disease of the mucous membrane, predominantly of the nose and nasopharynx. It is uncommon in Malaysia but has been seen in immigrant workers from endemic areas like India and Sri Lanka. A case seen in Johor is reported here to highlight the need of awareness among clinicians at a time where there is increasing numbers of immigrant workers in our country. The causative organism of this disease is Rhinosporidium seeberi, which is found in stagnant waters. Sporangia and endospores of R. seeberi are seen in the granulomatous polypoidal lesions. The patients commonly present with epistaxis and nasal blockage. Complete excision is the treatment of choice for this disease. Recurrences are common despite anti-microbial treatment.
Reviewing selected policy responses in Asia and South America, this paper draws pragmatic lessons for developing countries to better address the COVID-19 pandemic. It argues that not acting quickly and adequately incurs much higher costs. So-called 'best practices', while useful, may be inappropriate, especially if not complemented by effective and suitable socio-economic measures. Public understanding, support and cooperation, not harsh and selective enforcement of draconian measures, are critical for successful implementation of containment strategies. This requires inclusive and transparent policy-making, and well-coordinated and accountable government actions that build and maintain trust between citizens and government. In short, addressing the pandemic crisis needs 'all of government' and 'whole of society' approaches under credible leadership.
The PleurX catheter was developed to facilitate long-term intermittent drainage of malignant pleural effusion or ascites. For palliation, it is important that the process of insertion is safe and that this catheter remains complicationfree so as to improve end-of-life quality. We show that this catheter can be safely inserted and discuss methods to reduce infection, which was the most common complication. Our article hopes to enlighten clinicians, patients and their caregivers of this device as a treatment option in palliative patients. Proper case selection and caregiver training are essential in ensuring a successful outcome.
In Malaysia, induced termination of pregnancy is legal, if a registered medical practitioner is the one who terminates the pregnancy, and is acting in good faith without the risk to the life or injury to the mental health of the pregnant woman; in the event that continuation of the pregnancy is greater than the risk if the pregnancy is terminated. This case report highlights the approach of motivational interviewing in evoking a change of the behaviour of a patient wishing termination of pregnancy for psychosocial reasons.
Background: The provision of safe abortion services upholds the realization of justice in sexual and reproductive health. Many state-level studies in India have identified poor availability of abortion services in the public sector and negative attitudes toward abortion among health providers, as potential barriers to access. Materials and Methods: A cross-sectional study was done to document the availability and utilization of medical termination of pregnancy (MTP or abortion) services and to assess public sector health providers' attitudes towards safe abortion. It was carried out in a representative district of West Bengal, using a facility checklist and a validated attitude scale. Results: Only 11 of 42 public health facilities had both trained doctors and equipment to provide MTP services. Twelve facilities provided MTP services, of which only three urban-based secondary-level facilities provided second trimester MTPs. There were female providers in just 2 of the 12 MTP-providing facilities. Among the 64 health providers interviewed, 40% were trained to provide MTP. According to the attitude scale, 38% had a negative attitude toward the provision of safe abortion services. There was no statistically significant association between attitudes of health providers and provision of MTP. However, there appeared to be a subtle process of gatekeeping in operation, such as making MTP conditional on acceptance of contraception, requiring the husband's consent, and so on. Conclusions: The study shows the poor availability of abortion services in public sector facilities in a district of West Bengal, although all public health facilities from the primary health center level upwards are authorized to provide abortion services.
Juvenile dermatomyositis (JDM) is a systemic autoimmune condition with myopathy. Gastrointestinal and pulmonary manifestations are rare presentation of JDM. Gastrointestinal perforation incidence in JDM is associated with vasculopathy and ischaemia. There are only few reported case of management of JDM with gastrointestinal complication. Management of such condition is challenging. We present a 21-year-old man with spontaneous descending colon perforation undergoing Hartmann's procedure. He subsequently presented with recurrent retroperitoneal abscess at five and 30 months following the initial presentation which was treated with percutaneous drainage. A high index of suspicion is necessary in JDM patients presenting with acute abdomen.
In this study parallel scales were constructed to use to measure the levels of HIV-related stigma towards people living with HIV (PLHIV) in populations with different backgrounds in Sabah. The study also explored the components of stigma within the population. We found that there were three principle components of HIV related stigma: “Interpersonal distancing,” “Shame and blame,” and “Positive opinions about PLHIV”. The scales constructed showed adequate internal consistency (Cronbach’s Alpha of 0.69 to 0.85) in all samples. The medical students and people with more knowledge about HIV had significantly lower levels of all three factors of personal stigma. Regarding HIV-related knowledge, the non-medical university students and the rural community group were found to have poor knowledge of HIV transmission and prevention. This scale can be used by researchers or public health officials who wish to study HIV related stigma or to evaluate the impact of stigma interventions in the local context.
Study site: Universiti Malaysia Sabah; Rural Medical Education Centre, Sikuati, Kudat, Sabah, Malaysia