Introduction: Due to rapid urbanization, Malaysia is currently undergoing extensive amount of construction activities and significant rise in the construction waste. Improper construction wastes management practices have led to rise in the waste open dumping sites which may significantly affect the environment and public health. This study was undertaken to assess air pollution in such a site and the impact to the respiratory health of children studying in a nearby school. Methods: A comparative cross-sectional study was conducted in Sungai Buloh (exposed) and Kuala Selangor (comparative). Concentration of PM10 was monitored at the open dumping site (n=15), a nearby primary school (n=45) and a comparative primary school (n=12). Parents who gave consent (n=229) answered a questionnaire related to child’s respiratory health whereas their children participated in lung function assessment. Results: Concentration of PM10 at the dumping site, exposed school and comparative school was 0.245±0.048mg/ m3 , 0.270±0.020mg/m3 and 0.051±0.016mg/m3 respectively, with the first two significantly exceeded the 24-hour Malaysian Air Quality Standard (MAQS) for PM10 (0.150mg/m3 ). Besides, PM10 concentration in the exposed school was similar to the dumping site (p>0.05) and many folds higher than the comparative school (p
Introduction: The advancement of technology and an ecological shift in the creative media industry requires manag- ers and TV production workers to adapt to changes to ensure their well-being. Recent development shows a growing concern for the mental, physical and social health of creative media workers that demands a more in-depth inves- tigation. Studies have found that those working in television production are facing long hours of work, poor pay, isolation and insecurity. However, there is little empirical research undertaken on those who work in the Malaysian creative media industry, especially Malay Muslims. Studies of media workers in Malaysia are mostly concerned with news production and the impact of reporting and journalistic challenges. The purpose of this study is to explore how Malay Muslim creative media workers manage and negotiate their mental health and well-being issues. Methods: By employing a phenomenological approach, interviews were conducted with seven participants, exploring their experience in the creative media industry. Results: The study found four emergent themes: (a) passion and commit- ment for creative endeavours, (b) work culture, (c) issue on work-life balance, and (d) role of religion. Discussion: This study is an attempt towards understanding the mental health of those working in the creative and entertainment realms in Malaysia. Based on the findings, implication for practitioners and future studies are discussed.
Introduction: Teachers play a vital role in identifying students with dyslexia. The acquisition of this knowledge will help teachers to classify students who are at risk of dyslexia. The objective of this study is to identify the level of teachers’ knowledge about dyslexia that comprises of its general knowledge, diagnosis, symptoms and treatments. A cross sectional study was done upon 138 preschool teachers. This research was conducted by using ‘Knowledge and Beliefs about Developmental Dyslexia’ questionnaire, which consists of 36 items with 3 Likert scale questions. Findings revealed that the level of general knowledge possessed by the pre-school teachers was relatively different based on the construct even though they have respectively received the Diploma in Early Childhood Education. On the same hand, most of the respondents were found to be having higher understanding on the general knowledge about dyslexia compared to their understanding on the symptoms, diagnosis and the treatments.
Introduction: The objective of the study is to identify the relationship between knowledge and the practice of mental training skill during competitions which requires the athletes to gain control and boost their confidence. The study significantly states that knowledge and the practice of mental training skill during competitions are able to increase the athletes’ ability to control their state of mind and raise their confidence. Methods: 115 students of Malaysian Sport School, Pahang Malaysia participated in the study. One set of Likert scale questionnaire, which consists of five parts is used as the study instrument. The study instrument is based on the Competitive State Anxiety Inventory (CSAI- 2), Test of Performance Strategies (TOPS) and Mental Toughness Questionnaire (MTQ-48). Results: The research findings demonstrate an average level of knowledge on mental training skill with reference to the athletes’ control of their mental state and their confidence. However, the significant relationship between the knowledge and the prac- tice of mental training skill with regards to the athletes’ mind control and confidence during competitions shows a highly positive and moderate relationship. Conclusion: Healthy mental training skill helps improve the athletes’ per- sonality during competition. Apart from prioritising on the physical element in training applied in the competitions, the main elements which become the athletes’ source of mental strength, level of control and confidence are able to overcome the mental challenges.
Introduction: According to PDRM statistic, in average, 100 babies are dumped every year, in Malaysia. The stig-ma of having babies out of wedlock, feeling of desperation and lack of support are some reasons why babies were dumped at the unimaginable places. Even if they were found and saved, these babies will be placed and raised at institutions. This will lead to the negative effects of institutionalisation as they do not receive appropriate adult care and attention which is crucial in developing their potential. OrphanCare Foundation advocates and provides services that ensure babies and children who are in institutions and those whose lives are at risk grow up in the care of a loving family. Methods: OrpahnCare Foundation provides a safe haven for babies that are being abandoned through baby hatch centres, finding a family for these babies through a legal adoption programme, and deinstitutionalisation (DI) i.e. removing all children currently in institutions, to family based care. Results: Since 2010, OrphanCare Foun-dation has saved a total of 369 babies and successfully arranged for the adoption of 221 babies. Forty even children were taken out from institutions and brought home to their families. Conclusion: The best place for a child to grow up is in the love and care of a family. They will receive personalised guidance, support and love that they need to develop to their full potential.
Introduction: Acanthamoeba is an ubiquitous free-living protozoa which causes serious ocular problems. Acanthamoeba keratitis is becoming more prevalent amongst contact lens wearers. The disease can cause loss of vision and blindness if not treated properly. The objective of this research is to study the sensitivity of six Acanthamoeba spp. isolates, of which three were from the clinical isolates (HKL 95, HTH 40 and HS 6) and the remaining three from environmental isolates (TTT 9, TL 3 and SMAL 8) to antimicrobial agents. Methods: The antimicrobial agents chosen for this purpose were polyhexamethylene biguanide (PHMB) and chlorhexidine. Serial dilutions were perfomed for polyhexamethylene biguanide and chlorhexidine. Cyst suspensions from the chosen isolates were exposed to PHMB and chlorhexidine respectively. After 48 hours incubation time at 30°C, each mixture was filtered and filtration membrane was put onto non-nutrient agar laid with Escherichia coli. The agar plates were incubated for three days at 30°C and examined daily until day 14 to detect the presence of Acanthamoeba trophozoites under the inverted microscope. The presence of trophozoites indicated the ineffectiveness of the antimicrobial agents. Results: Both of the antimicrobial agents tested were found to be effective against Acanthamoeba cysts from all the test strains. Polyhexamethylene biguanide gave a minimum cysticidal concentration (MCC) mean value of 2.848 μg/mL while chlorhexidine showed
MCC mean value at a concentration of 3.988 μg/mL. Conlusion: It can be concluded that the Acanthamoeba cysts were sensitive to polyhexamethylene biguanide and chlorhexidine.
Acanthamoeba is a free-living protozoa which causes serious ocular problem. Acanthamoeba keratitis is becoming more prevalent amongst contact lens wearers and it can cause loss of vision and blindness if not treated properly. The objective of this research is to determine the effectiveness of gentamicin against six Acanthamoeba spp. isolates, of which three were clinical isolates (HS 6, HKL 95, HTH 73) and three environmental isolates (SMAL 7, SMAL 8, TTT 9). Cyst suspension from the chosen isolates were exposed to gentamicin. After 48 hours of incubation at temperature of 30°C and 37oC, each mixture was filtered and filtration membrane was put onto non-nutrient agar laid with Escherichia coli. The agar plates were incubated for three days at 30oC and 37oC and the plates were examined daily until day 14 to look for the presence of Acanthamoeba trophozoites under inverted microscope. The presence of trophozoites indicated the ineffectiveness of gentamicin. Gentamicin was found to be effective against Acanthamoeba cysts from all the test strains at both incubation temperatures. The minimum cysticidal concentration (MCC) mean value of gentamicin was 0.193 mg/mL at 30oC and 0.229 mg/mL at 37oC. So, we concluded that gentamicin has cysticidal potential towards Acanthamoeba.
Introduction: Clinical wastes produced by health facilities were considered as scheduled waste listed in the First Scheduled of the Environmental Quality (Scheduled Waste) Regulation 1989. The management of clinical waste in all government hospitals in Sabah were outsourced to private concession company. Until now, there was no research being done in Sabah to evaluate it. Methods: This cross-sectional study was carried out on eight concessionaire com-panies located inside accredited non-specialist government hospitals in West Coast Division & Interior Division of Sabah. Data collected through Clinical Waste Management (CWM) Scores and Questionnaires. CWM scores adopt 5 elements of accreditation standard produced by Malaysian Society Quality in Health (MSQH). Questionnaires were used to collect concessionaire staff’s basic personal data, services and activities related to clinical wastes ac-cording to MSQH standard. Response from questionnaires were used to compare and support result gained from CWM scores. Descriptive analysis was used to analyze the data. Results: Two concessionaire companies got overall CWM scores ranging between 86% - 90%, while the other six companies were above 95%. It happened because both companies gained 81% and 73.3% on Policies and Procedures element. Result from questionnaires answered by 67 concessionaire staffs showed 98% of staffs had attended meeting, 97% had received an orientation, 97% had received training related to clinical wastes, 95% agreed that their work was monitored and no occupational disease and injury recorded between January to April 2019. These result correlate with CWM scores gained under Orga-nization Management element (99.6%), Human Resource Management element (90.1%), Facilities and equipment element (97%) and Safety & Quality Improvement element (100%). Conclusions: All concessionaire companies were implementing excellent clinical waste management in hospitals. CWM scores can be used to rank individual conces-sionaire company and provide pattern of uniformity or non-uniformity of the clinical waste management in Sabah.
With its high fibre content, okara has potentials to be used in bakery products, e.g. par-baked frozen bakery. This study aimed to develop frozen par-baked chapatti (Indian flat bread) through substitution of atta flour with okara flour. Six substitution treatments were applied. Samples were analysed for their physical characteristics, sensory acceptance and nutrient content. Up to 15 % substitution gave no significant effects on samples’ texture and colour. Furthermore, it almost tripled the sample’s fibre content without any detrimental effects on its sensory acceptance. Frozen storage up to eight weeks did not significantly affect samples’ characteristics, thus making this product fea- sible.
Introduction: The incidence of antimicrobial resistance (AMR) has increased worldwide including Malaysia, which may be attributed partly to inappropriate prescribing of antimicrobials. Antimicrobial prescribing form has been introduced to mandate appropriate antimicrobial prescription including documented indication as a key standard of antimicrobial stewardship practice. Hence, this current study aimed to determine the usage and completeness of the designated antimicrobial prescribing form that had been implemented in the General Intensive Care Unit (GICU), Universiti Kebangsaan Malaysia Medical Centre (UKMMC). Methods: This prospective observational study was carried out in GICU UKMMC from 30 August 2018 to 30 November 2018 by convenience sampling. The information that was recorded in the antimicrobial prescribing form was collected by using the designated data collection form. A total of 68 patients were included and 205 antimicrobial prescribing forms were evaluated. Results: There were 100% usage of antimicrobial prescribing forms found in this study. However, only 81 ± 8 % of these forms were completely filled. Indication for the antimicrobial prescription was not filled in 47% of the forms. Almost two thirds of the antimicrobial prescriptions were empirically indicated and one percent de-escalation of antimicrobial therapy was filled in the forms. These prescriptions comprised of 91.7% antibiotics, 7.8% antifungals and 0.5% antivirals. The suspected site of infections were primarily from the lungs (27%), gastrointestinal (16%), blood (16%) and central nervous system (14%). Piperacillin/Tazobactam was the most frequent antibiotic prescribed (21%), followed by third and fourth generation cephalosporins (20%). Conclusion: This study provided an overview of the uptake of the antimicrobial prescribing form implementation and highlighted the requirement for supplementary efforts to maximize the compliance of this form.
Introduction: Hyperphosphatemia is common among hemodialysis patients, often accompanies with unfavourable clinical outcomes. Several factors affect phosphate compliance among hemodialysis patients, with lack of such infor- mation at the local context. Thus, this cross-sectional study aimed to determine the associations of sociodemographic factors, knowledge on optimal control of serum phosphate, perceived social support from family, dietary phospho- rus intake and phosphate compliance among hemodialysis patients. Methods: Structured questionnaire was used to obtain information on socioeconomic factors, knowledge, family social support and dietary phosphorus intakes of hemodialysis patients, with serum phosphate level was used as the surrogate marker for phosphate compliance. Results: A total of 76 patients (Mean age of 52 years old) were recruited. Hyperphosphatemia was prevalent with ap- proximately 60% of the patients failed to achieve the target. Approximately 90% of the patients perceived low level of family social support. Young patients had significant higher serum phosphate compared to their older counterparts (r = -0.297, p =0.009). Serum phosphate was positively correlated with dietary intake of phosphorus, dialysis vintage (r = 0.301, p = 0.006) and comorbidity score (r = 0.325, p = 0.008) while negatively correlated with dialysis dose (r = -0.582, p = 0.002) and family social support (r = -0.263, p = 0.024). Conclusion: The promising role of dietary phosphorus intake in managing hyperphosphatemia deserves further attention. Innovative approaches are needed to promote self-adherence on serum phosphate especially the younger patients. It is imperative to promote family social support in the management of hyperphosphatemia among hemodialysis patients.
Introduction: Cognitive decline and cognitive impairment among older adults is a rising public health concern because of its association with increased risk of dementia, disability and mortality. In Malaysia, early identification of cognitive impairment is uncommon due to lack of understanding of risk profile of the elderly population. The objective of this study was to determine factors associated with cognitive impairment among community-dwell- ing older adults. Methods: This cross-sectional study was conducted among 698 community-dwelling older adults aged 60 years old and above in Klang Valley, Malaysia by using multi-stage sampling to determine the risk factors and predictors of cognitive impairment from a multidimensional approach. Multivariate logistic regression analysis was performed to determine the relationship between socio-demographic characteristics, physical activity, physical functional status and cognitive impairment. Results: Increased of age (OR = 1.056), being female (OR = 2.219) and Indian (OR = 2.722) were the risk factors for cognitive impairment, while years of education (OR = 0.765), physically active (OR = 0.823) and better physical function (OR = 0.843) were significantly associated with decreased risk of cognitive impairment. Marital and nutritional status failed to predict the risk of cognitive impairment. Conclusion: Given the protective effects of physical activity and physical function on the cognitive decline at later age, relevant policymakers should formulate appropriate health education programmes to promote regular physical activity to improve physical and cognitive function among Malaysians across all ages.
Introduction: Recognising the limitations of present dietary assessments method, recent attention had been drawn to image-based food record (IBFR) to assess dietary intake of the population. Thus, the present study aimed to compare nutrient intake assessed using IBFR with 24-hour diet recall (24DR) among nutrition and dietetics student. Method: There were 46 nutrition and dietetic undergraduates participated in the study, and information on the socio-demo- graphic background and acceptability toward IBFR were obtained. Respondents were trained to complete one-day IBFR, and they were interviewed by researchers on the following day for their 24DR. Result: The mean age of respon- dents was 21.4±1.7 years old. The present study revealed that there were significantly higher protein and beta-caro- tene, but lower vitamin C reported by IBFR compared to 24DR. Medium to strong correlations were found between IBFR and 24DR for energy and nutrients intakes. The Bland-Altman analysis demonstrated a good level of agreement between IBFR and 24DR for energy and macronutrients (carbohydrates, protein and fat), respectively. The mean differences between IBFR and 24DR were -36 kcal for total daily energy intake, while mean differences of -12.24g, 0.79g, and 1.52g were reported for carbohydrates protein, and fat, respectively. Moderate level of agreement toward acceptability was demonstrated, and most of them (67.4%) preferred IBFR method. Conclusion: The present study re- vealed that IBFR showed a good level of agreement with 24DR in assessing nutrient intake. However, more extensive works should be considered to improve IBFR in assessing the energy and nutrients intake for the general population.
Introduction: Parents play significant roles in developing the behaviour of their children towards food. However, mothers usually represent the parents of the children in previous studies, while fathers were left out and their con- tribution remained unknown. This study compared paternal and maternal feeding practices and parenting styles between overweight or obese (OW/OB) and normal weight (NW) primary school children. Methods: There were 419 children aged 10 to 11 from four randomly selected national primary schools being screened for their body weight and height. There were 105 children identified as OW/OB and matched with 105 NW children based on sex, age and ethnicity, whose both their parents were then recruited as study subjects. Parents reported their personal body weight and height, and completed a questionnaire on parenting styles and feeding practices. Results: There were 34.9% of children overweight and obese, and more than half of their fathers (66.5%) and mothers (52.5%) were over- weight and obese. Both fathers and mothers of the OW/OB children perceived their children to be slightly heavier, but a majority of them perceived their children’s body weight status less accurately and applied less pressure to eat. Fathers of the OW/OB children were more in the obese category, performed indulgent parenting style, perceived less feeding responsibility and applied less monitoring on their children, but not mothers. Conclusion: There were distinct differences in paternal and maternal feeding practices and parenting styles between OW/OB and NW chil- dren. Researchers should encourage fathers to involve in childhood obesity research instead of focusing on mothers.
Introduction: Literatures suggest that insufficient physical activity as one of the contributors to non-communicable chronic diseases; nevertheless, data on the physical activity level is sparsely reported among individuals practising a vegetarian diet in Malaysia. The current study aims to determine the prevalence of insufficient physical activity and its association with socio-demographic factors, lifestyle factors and body weight status among 273 individuals prac- tising a vegetarian diet in Klang Valley, Malaysia. Methods: A set of self-administered questionnaire was distributed to all vegetarians and their data on physical activity was determined using the Global Physical Activity Questionnaire (GPAQ). Results: The average years of practising vegetarianism was 14.2±9.6 years, and most of the vegetarians were practised ovo-vegetarian diet (44.0%). A majority of them were Chinese (54.9%) and female (64.8%), with an aver- age age of 47.5 ± 13.1 years. The prevalence of overweight and obesity were 27.5% and 8.1%, respectively. Accord- ing to GPAQ, about two in five vegetarians (46.2%) were having insufficient physical activity. Being females, older age, Chinese, married individuals, and those with high total household income level were found to be significantly associated with low physical activity level among Malaysian vegetarians (p
Introduction: Amyloid-β (Aβ) peptides play a key role in the pathogenesis of Alzheimer disease and exert various toxic effects on neurons. Dietary phytochemicals are currently used as an adjuvant therapy to accelerate their therapeutic efficacy. Therefore, the present study was designed to investigate the effect of curcumin and its co-administration with piperine against Aβ42 induced cytotoxicity, fibril aggregation and oxidative damage in SH-SY5Y cells. Methods: The neuroblastoma SH-SY5Y cells were cultured with different treatments of Aβ42, individual curcumin and piperine and combination of curcumin and piperine. Cell viability, Aβ fibril aggregation and oxidative damage such as lipid peroxidation, catalase and glutathione were assessed. The abilities of curcumin and its combination, piperine to scavenge free radicals and to inhibit Aβ aggregation and β-sheeted formation were further assessed. Results: Curcumin and piperine preserves cell viability, which is decreased by Aβ, indicate that curcumin protects Aβ-induced neuronal damage. Under aggregating conditions in vitro, curcumin and piperine inhibited aggregation as well as disaggregated fibrillar Aβ42, indicating favorable stoichiometry for inhibition. Results also showed that curcumin and piperine as a combination was a better Aβ42 aggregation inhibitor than the individual compounds. Curcumin and piperine depresses Aβ-induced up-regulation of neuronal oxidative stress. The ability of these compounds to scavenge free radicals and inhibit the formation of Aβ aggregation are implicated from the results of this study. Conclusion: This combination of curcumin and piperine shows a more protective effect on neuronal oxidative damage when they was added into cultured neurons not later than Aβ, especially prior to Aβ. The curcumin and piperine combination prevents neurons from Aβ-induced oxidative stress, indicating a promising therapeutic in preventive medicine for Alzheimer disease.
Introduction: Diabetes mellitus is a major risk factor for chronic kidney disease (CKD). Thus, making routine screen- ing among the diabetic group is necessary in order to reduce the burden of the disease. As such, various risk pre- diction models including QKidney model have been developed for early detection of CKD. However, the Qkidney model has not been validated in Malaysia. This study aimed to evaluate the performance of QKidney model in pre- dicting a 5-year risk of developing CKD in a cohort of type 2 diabetes mellitus (T2DM) patients in the primary care setting. Methods: A total of 377 T2DM patients attended the primary care clinic at the town of Rawang, aged 30-74 years old, and free of CKD outcomes at baseline were recruited and followed-up for 5 years. Their CKD risk was calculated using the QKidney model. The predictive performance of QKidney model was assessed through discrimi- nation and calibration analyses. Results: At the end of the 5-year follow-up, a total median QKidney score was 3.9% (IQR: 5.9). The median QKidney score of male participants (7.3%) was significantly higher than that of the females (3.0%) (p < 0.001). The QKidney model has a moderate discrimination in which the area under the receiver operat- ing characteristic curve was 0.748, with good calibration (χ2 = 13.039, p = 0.111). Conclusion: It was found that the QKidney model had a moderate discriminative ability with good calibration. When taken together, it was suggested that the QKidney model could be utilized to predict a moderate-to-severe CKD risk in Malaysians with T2DM.
ABSTRACTS FOR INTERNATIONAL HEALTH AND MEDICAL SCIENCES CONFERENCE 2019 (IHMSC 2019). Accelerating Innovations in Translational and Precision Medicine. Held at Taylor’s University Lakeside Campus, Subang Jaya, Selangor, Malaysia. 8-9th March, 2019
Introduction: According to the National Health and Morbidity Survey (NHMS) 2015, 47.7% of the Malaysian population are either obese or overweight. The increased obesity prevalence has caused major health problems including cardiovascular diseases and diabetes. Although several anti-obesity drugs have been developed, they are limited due to adverse side effects. Previous studies demonstrated that xanthorrhizol (XNT) reduced the levels of serum free fatty acid and triglyceride in vivo, but the detailed anti-obesity activities and its related mechanisms are yet to be reported. Thus, this study aims to evaluate its abilities to inhibit adipocyte hyperplasia and hypertrophy employing 3T3-L1 adipocytes.
Methods: Statistical significance was established by one-way ANOVA, where p < 0.05 was considered statistically significant.
Results: In this study, the IC50 value of XNT (98.3% purity) from Curcuma xanthorrhiza Roxb. in 3T3-L1 adipocytes was 35 ± 0.24 μg/mL. The loss of cell viability was due to 20.01 ± 2.77% of early apoptosis and 24.13 ± 2.03% of late apoptosis. XNT elicited apoptosis via up-regulation of caspase-3 and cleaved PARP-1 protein expression for 4.09-fold and 3.12-fold, respectively. Moreover, XNT decreased adipocyte differentiation for 36.13 ± 3.64% and reduced GPDH activity to 52.26 ± 4.36%. The underlying mechanism was due to impaired expression of PPARγ to 0.36-fold and FAS to 0.38-fold, respectively. On the other hand, XNT increased glycerol release by 45.37 ± 6.08% compared to control. During lipolysis, XNT up-regulated the leptin protein for 2.08-fold but down-regulated the protein level of insulin to 0.36-fold. These results indicated that XNT reduced the volume of adipocytes through modulation of leptin and insulin.
Conclusion: To conclude, XNT exerted its anti-obesity mechanisms by suppression of adipocyte hyperplasia through induction of apoptosis and inhibition of adipogenesis whilst reduction of adipocyte hypertrophy through stimulation of lipolysis. Thus, XNT could be developed as a potential anti-obesity agent in the future.
Introduction: Constipation is affecting a quarter of human population at any one time in all age groups. However, a proper gamma scintigraphic study of whole GI transit is rarely performed in Malaysia due to the lack of suitable radiopharmaceutical. Hence, this study was taken to develop a suitable radiotracer formulation for gamma scintigraphy study of whole gastric-intestinal transit. Methods: The biocompatible polystyrene (PS) incorporated with 152Sm2O3 (5%, w/v) will be used to synthesize the radiotracer. The 152Sm-labelled PS particles was neutron activated to 153Sm in a nuclear reactor for 5 minutes. Characterization of the physicochemical properties, gamma spectrometry and in-vitro radiolabeling studies in simulated gastric fluid (SGF) and simulated intestinal fluid (SIF) were carried out to study the properties and stability of the radiotracer before and after neutron activation. Results: Scanning electron microscope (SEM) and particle size analysis showed that size, shape and surface morphology of the particles remained after neutron activation. The synthesized 153Sm-labelled PS radiotracer (100 mg) particles achieved an activity of 3.7 MBq after 46 hrs. As indicated by the gamma spectrometry result, there is no long half-life radioimpuirties present in the samples. The 153Sm-labelled PS particles achieved radiolabeling efficiency of more than 95% in both SGF and SIF over 72 hrs. Conclusions: A 153Sm-labelled radiotracer particles formulation has been successfully developed from biocompatible PS. The proposed formulation has the advantage of cheaper, easier to be produced and reduced radiation exposure to staff. Further studies are required to validate the in-vivo performance of 153Sm-labelled formulation for assessing GI motility and transit in clinical use.
Introduction: Cancer has become a major economic and societal burden. The National Cancer Registry of Malaysia (NCR) estimates that one in four Malaysian (1:4) will develop cancer by the age of 75. This project aims to develop a prototype named “Laser ablation needle” for tissue cauterization and percutaneous hyperthermia cancer therapy. Our ultimate goal is to develop a highly flexible, operator-friendly and cost-effective laser ablation needle for tissue cauterization and hyperthermia cancer therapy, hence to improve the overall cancer survival rate and quality of life among the cancer patient population. Methods: The laser ablation needle is a closed loop opto-electronic control system, consists of a 2 mm Fiber Bragg Grating (FBG) – optical fiber temperature sensor, a laser driven hot needle and a micro-controller. Based on real-time temperature input from the FBG sensor, the micro-controller can perform a dynamic PID control on laser intensity for a safe hyperthermia treatment. In the fabrication, a medical grade optical fiber with a diameter of 800 μm was used for laser delivery. The optical fiber was embedded inside a biocompatible resin-made needle and connected to a 450 nm high power blue laser diode. The FBG temperature sensor was incorporated in the needle for real-time temperature monitoring and control. Focal hyperthermia produced by the laser-driven hot needle was conducted on ex-vivo bovine liver. Results: The rise in temperature was recorded by increasing laser power. The temperature profile was obtained at each depth. Irreversible thermal denaturation during irradiation was captured. Conclusion: These preliminary results suggest that this technique can be applied safely and effectively for cancer treatment. The developed prototype comprised of the diode laser showed that it can deliver its energy via simple optical fiber. This laser is cheaper and much smaller than the conventional high power lasers used in other studies.