Browse publications by year: 2024

  1. Saimon JA, Salim ET, Amin MH, Fakhri MA, Azzahrani AS, Ali ABM, et al.
    Sci Rep, 2024 Nov 15;14(1):28192.
    PMID: 39548127 DOI: 10.1038/s41598-024-73360-5
    This study successfully synthesized high-performance photodetectors based on Ag-WO3 core-shell heterostructures using a simple and economical two-step pulsed laser ablation in water method and has investigated the electrical characteristics of the Ag@WO3 nanocomposite heterojunction. The Hall effect tests indicate that the synthesized Ag@WO3 exhibits n-type conduction with a Hall mobility of 1.25 × 103 cm2V-1S-1. Dark current-voltage properties indicated that the created heterojunctions displayed rectification capabilities, with the highest rectification factor of around 1.71 seen at a 5 V bias. A photodetector's responsivity reveals the existence of two response peaks, which are situated in the ultraviolet and visible region. The photodetector demonstrates a rapid response time of less than 100 ms. The detectivity values for wavelengths of 350 nm and 490 nm were 35 × 1013 Jones and 28 × 1013 Jones, respectively. The n-Ag-WO3/n-Si photodetector achieved a maximum EQE of 11.5% in the ultraviolet wavelength when subjected to 3 V and illuminated with 350 nm (26 mW/cm2) light. The devices demonstrate rapid switching behavior with a rise time of 0.32 s and a fall time of 0.33 s. The time-dependent light response of a photodetector under illumination at 26 mW/cm2 is seen at a bias of 3 V. The light exhibits a rise and decay duration of 15 s, while the photocurrent gain is measured at 9µA. The photocurrent of devices exhibited a positive correlation with the incoming light intensity, suggesting that the junction has the potential to function as a photo detector.
  2. Banga A, Iqbal N, Ikram A, Innab N, Alluhaidan AS, ElZaghmouri BM, et al.
    Sci Rep, 2024 Nov 15;14(1):28205.
    PMID: 39548161 DOI: 10.1038/s41598-024-77927-0
    In the contemporary landscape of smart cities, ensuring the security and confidentiality of transmitted data has become paramount. The proliferation of Internet of Things (IoT) devices, mobile communication platforms, and wireless sensor networks has magnified the need for robust cryptographic solutions to safeguard sensitive information from malicious adversaries. In response to these challenges, we introduce ChessCrypt-a novel approach to enhancing wireless communication security through the development of a new S-Box algorithm inspired by the nonlinear movement patterns of chess pieces. ChessCrypt leverages the dynamic and unpredictable nature of chess piece movements, namely knights, kings, and bishops, to introduce a high degree of nonlinearity and confusion into the encryption process. By incorporating elements of randomness and unpredictability, our proposed S-Box algorithm offers robust protection against a wide range of cyber threats, including eavesdropping, data interception, and cryptographic attacks. We demonstrate the effectiveness and resilience of ChessCrypt through rigorous testing and analysis, showcasing its superiority over traditional cryptographic methods in enhancing the security of wireless communication networks. Our results underscore the significance of ChessCrypt as a promising solution for fortifying wireless communication security in an increasingly interconnected world of ours.
  3. Hong X, Lee JC, Qian B, Yu M, Li Q, You P
    Sci Rep, 2024 Nov 15;14(1):28199.
    PMID: 39548244 DOI: 10.1038/s41598-024-79819-9
    Graphene oxide (GO) has achieved significant progress in the material behaviour of cement-based materials. However, research on its structural behaviour in high-strength lightweight concrete (HSLWC) structures is limited, which restricts its engineering applications. This study focused on investigating the effects of low contents of GO on the shear behaviour of HSLWC beams. A total of four HSLWC beams with GO contents of 0, 0.01, 0.03 and 0.05% (by weight of cement) were designed to observe failure modes, load‒deformation curves, shear capacities, crack behaviour and load‒strain curves under four-point loading by a 300 kN servo loading device. The results revealed that all the beams exhibited shear compression failure. GO improved the shear capacity of the HSLWC beams, and this strengthening effect increased with increase in GO content. When the content of GO was 0.05%, the ultimate load of the beam reached a maximum, which was 39.2% greater than that of the control beam. GO can endow the HSLWC beams with a certain degree of ductility. In addition, a modified JGJ 12-2006 model was proposed to predict the shear capacity of HSLWC beams containing different GO contents on the basis of a comparison of typical models. This study can provide exploratory engineering practice for evaluating and designing GO-reinforced HSLWC structures.
  4. Bansal S, Jain A, Kumar S, Kumar A, Kumar PR, Prakash K, et al.
    Sci Rep, 2024 Nov 15;14(1):28230.
    PMID: 39548271 DOI: 10.1038/s41598-024-79727-y
    This research explores the design of an infrared (IR) photodetector using mercury cadmium telluride (Hg1-xCdxTe). It proposes two- and three-dimensional homojunction models based on p+-Hg0.7783Cd0.2217Te/n--Hg0.7783Cd0.2217Te, focusing on applications in the long-wavelength infrared range. The photodetector's performance is analyzed using Silvaco ATLAS TCAD software and compared with analytical calculations based on drift-diffusion, tunneling, and Chu's approximation techniques. Optimized for operation at 10.6 μm wavelength under liquid nitrogen temperature, the proposed photodetector demonstrates promising optoelectronic characteristics including the dark current density of 0.20 mA/cm2, photocurrent density of 4.98 A/cm2, and photocurrent density-to-dark current density ratio of 2.46 × 104, a 3-dB cut-off frequency of 104 GHz, a rise time of 0.8 ps, quantum efficiency of 58.30 %, peak photocurrent responsivity of 4.98 A/W, specific detectivity of 3.96 × 1011 cmHz1/2/W, and noise equivalent power of 2.52 × 10-16 W/Hz1/2 indicating its potential for low-noise, high-frequency and fast-switching applications. The study also incorporates machine learning regression models to validate simulation results and provide a predictive framework for performance optimization, evaluating these models using various statistical metrics. This comprehensive approach demonstrates the synergy between advanced materials science and computational techniques in developing next-generation optoelectronic devices. By combining theoretical modeling, simulation, and machine learning, the research highlights the potential to accelerate progress in IR detection technology and enhance device performance and efficiency. This multidisciplinary methodology could serve as a model for future studies in optoelectronics, illustrating how advanced materials and computational methods can be utilized to enhance device capabilities.
  5. Tan JYC, Ng SY, Chan HK, Wong PM, Mohamed Zabidi H, Abu Hassan MR
    J Cardiol, 2024 Dec;84(6):362-365.
    PMID: 38852775 DOI: 10.1016/j.jjcc.2024.06.001
    BACKGROUND: Children with intravenous immunoglobulin (IVIG) resistant Kawasaki disease (KD) are at higher risk of developing coronary artery (CA) aneurysm. Early identification of high-risk patients using a predictive tool would allow for earlier interventions to prevent cardiac complications.

    METHODS: Children with KD who were admitted to five selected hospitals in Malaysia between 2008 and 2018 and received 2 g/kg of IVIG within 10 days from the onset of illness were included. Predictors of IVIG resistance in KD were determined using multiple logistic regression analysis. An optimal cut-off point was set using receiver operative characteristic curve and a final multiple logistic regression analysis was performed entering these cut-off points. A new scoring system was constructed.

    RESULTS: A total of 276 patients were included. IVIG resistance occurred in 9.1 % of them. Total bilirubin [OR 7.37; 95 % CI (2.18, 24.83)], male sex [OR 0.34; 95 % CI (0.10, 1.19)], C-reactive protein (CRP) [OR 0.17; 95 % CI (0.02, 1.38)] and neutrophils [OR 0.25; 95 % CI (0.05, 1.21)] were found to be significant predictors for IVIG resistance. The findings led to the development of a new predictive tool called the Hibiscus score, which scored 1 point each for neutrophils ≥60 %, CRP ≥80 mg/L, and male sex, while total bilirubin ≥9.4 μmol/L scored 2 points. A cut-off point of ≥4 with this prediction score yielded a sensitivity of 78.9 % and specificity of 80.5 %, with area under the curve of 0.835 [95 % CI (0.752, 0.919)]. CA aneurysms occurred in 6.7 % of IVIG responders and 32 % of IVIG-resistant children (p 

    MeSH terms: Bilirubin/blood; C-Reactive Protein/analysis; Child; Child, Preschool; Coronary Aneurysm/etiology; Coronary Aneurysm/prevention & control; Drug Resistance*; Female; Humans; Immunologic Factors/therapeutic use; Infant; Malaysia; Male; Predictive Value of Tests; Retrospective Studies; ROC Curve
  6. Lee SY, Chan CYW, Chiu CK, Chung WH, Hasan MS, Kwan MK
    Eur Spine J, 2024 Oct;33(10):3806-3813.
    PMID: 38861024 DOI: 10.1007/s00586-024-08352-0
    PURPOSE: To report the efficiency of OT utilisation and perioperative outcomes with a dedicated spine team approach in AIS patients who underwent posterior spinal fusion (PSF) surgeries in a consecutive case operation list.

    METHODS: Three AIS patients operated in a day (8:00 AM-8:00 PM) by a dedicated spine team were recruited between 2021 and 2022. The dedicated team comprised of three senior spine consultants who operated using a dual attending surgeon strategy, an anaesthetic consultant, dedicated surgical scrub nurses, anaesthesiology nurses, radiographers, and neuromonitoring technicians. Patients were categorised according to the sequence of operation list of the day (Case 1, Case 2, and Case 3). OT efficiency was represented by OT time in five stages (preoperative time, operative time, postoperative time, total OT time, and turnover time). OT time and perioperative outcomes were compared.

    RESULTS: 102 cases were analysed. On average, Case 1 began at 8:38 AM whereas Case 3 ended by 5:54 PM. OT efficiency was consistent throughout the day of operation with comparable OT time in all five stages between groups (p > 0.05). The mean turnover time was 15.1 ± 13.5 min and the mean operative time was 123.0 ± 28.1 min. Intraoperative arterial blood gas (ABG) parameters were maintained in an optimal range. The complication rate was 2.0% (N = 2/102).

    CONCLUSION: Consistent OT efficiency was demonstrated with a dedicated spine team approach. Despite performing three AIS cases in a consecutive case operation list, patients' safety was not compromised as perioperative outcomes between groups were comparable.

    MeSH terms: Adolescent; Female; Humans; Male; Operating Rooms*; Patient Care Team; Operative Time
  7. Tong WT, Seth A, Ng MPE, Tong SC, Lau A, Chen TY, et al.
    Asia Pac J Public Health, 2024 Nov;36(8):676-688.
    PMID: 38869052 DOI: 10.1177/10105395241258530
    This rapid review aimed to present a comprehensive overview of barriers, facilitators, and effective interventions that promote vaccination uptake by older adults in the Asia-Pacific region. Rapid review methodology was applied, using two databases (PubMed, Embase). Articles were included if studies were conducted in Australia, Singapore, Indonesia, and the Philippines; included human population ≥50 years of age, and was published from 2016 to August 2022. Related articles were not found from Indonesia and Philippines. A total of 23 articles met the inclusion criteria, with 19 reporting on barriers and facilitators, whereas, four articles reported effective interventions to promote vaccination uptake. Among the 19 studies that identified barriers and facilitators to vaccination uptake, the more common factors were social influences (n = 8/19), perceived benefits of vaccine (n = 7/19), and perceived vaccine safety (n = 6/19). Interventions that focused on supporting clinicians were found to be effective in leading them to recommend vaccinations among older adults, such as creating awareness on the low baseline vaccination rates among older adults, provision of structured health assessment, and nurse reminders. More studies are needed to ascertain the barriers and facilitators to uptake, as well as to identify effective interventions influencing vaccine uptake among older adults in the Asia-Pacific region.
    MeSH terms: Aged; Australia; Humans; Indonesia; Middle Aged; Patient Acceptance of Health Care/psychology; Patient Acceptance of Health Care/statistics & numerical data; Philippines; Singapore
  8. Zambrano-Monserrate MA, Subramaniam Y, Adnan N, Bergougui B, Adebayo TS
    Environ Pollut, 2024 Dec 01;362:124940.
    PMID: 39265769 DOI: 10.1016/j.envpol.2024.124940
    This paper analyzes the dynamic impact of economic, social, and governance factors on PM2.5 concentrations in 89 countries from 2006 to 2019. Using the GMM-PVAR approach and Impulse-Response Functions, we examine how shocks to specific variables affect PM2.5 concentrations over a 10-year period. Our findings reveal that the influence of these factors on PM2.5 levels varies over time. For example, a shock in urbanization has no effect on PM2.5 concentrations in the first year, but in the second year, pollution increases significantly. In the third period, PM2.5 levels decrease, but they rise again in the fourth period, albeit not significantly. By the fifth period, pollution decreases until a new equilibrium is reached in the sixth period. Additionally, a shock in financial development, government effectiveness, industrialization, trade openness, or GDP has no effect on PM2.5 concentrations in the initial period. However, during the second period, air pollution decreases, followed by an increase in the third period and a decrease again in the fourth period. These dynamic patterns highlight the need for environmental policies that consider the evaluation time horizon. Our analysis is supplemented by the Granger causality test, guiding specific policy recommendations based on our findings.
    MeSH terms: Urbanization; Environmental Policy
  9. Kho BP, Ho HT, Tan SY, Chee FS, Kow FT, Ooi S, et al.
    Int J Pharm Pract, 2024 Nov 14;32(6):507-514.
    PMID: 39270638 DOI: 10.1093/ijpp/riae050
    OBJECTIVES: This research aimed to determine postpartum females' self-reported adherence to and experience with short-term thromboprophylaxis using enoxaparin injection, after counselling by pharmacists. It also sought to assess their knowledge of thromboprophylaxis, injection techniques, and confidence in self-injecting.

    METHODS: This prospective cohort study was conducted at a public tertiary hospital in Malaysia from March to June 2023. Self-injection-naïve postpartum females who were initiated on thromboprophylaxis and counselled by a pharmacist were conveniently sampled. Knowledge regarding thromboprophylaxis, injection readiness, and technique were assessed one day after the counselling session. A telephonic interview was conducted at the end of the 10-day therapy to determine adherence and adverse effects experienced.

    KEY FINDINGS: A total of 259 subjects were successfully followed up, with 87.6% (n = 227) adherent to the therapy. Nonadherence was predominantly due to forgetfulness; four had their treatment withheld due to bleeding. One-third of subjects experienced localised pain and bruising. Subjects answered a median of 5/7 knowledge questions and recalled a median of 8/10 injection steps correctly, with those who read the information leaflet provided after counselling scoring significantly higher (P = .02). The majority declared moderate confidence in their ability to self-inject. Subjects who intended to self-inject (P < .01) and were more confident (P = .02) demonstrated better injection technique.

    CONCLUSIONS: Postpartum females counselled by pharmacists largely adhered to short-term enoxaparin for thromboprophylaxis. The impact of the counselling session may be enhanced by addressing their psychological readiness to self-inject, awareness of adverse effects identification, mitigation, and management, as well as setting reminders to prevent forgetfulness to inject.

    MeSH terms: Adult; Female; Humans; Health Knowledge, Attitudes, Practice; Malaysia; Patient Education as Topic; Pharmacists*; Prospective Studies; Cohort Studies; Postpartum Period*; Young Adult
  10. Sharuddin SSN, Abdullah SRS, Hasan HA, Othman AR, Ismail N'
    Sci Total Environ, 2024 Dec 01;954:176189.
    PMID: 39277001 DOI: 10.1016/j.scitotenv.2024.176189
    Almost over ten years, environmental experts have concentrated on implementing risk-based management strategies for the remediation of sites contaminated with total petroleum hydrocarbons (TPHs), which can potentially have detrimental ecological impacts. Phytoremediation widely recognized as a green technology a plant-based and economically efficient technology, emerges as a promising method to offer an alternative to existing treatment technologies in TPH contaminated ecosystems. The utilization of Scirpus grossus, a perennial plant, has been proposed as a practical, safe, and cost-effective method for remediating soil contaminated with petroleum hydrocarbons. This study aimed to evaluate the efficacy of S. grossus in removing total petroleum hydrocarbons (TPH) in real crude-oil sludge. Employing a batch phytoremediation system with S. grossus, the experiment was conducted in crates within a greenhouse, maintaining ambient temperatures (30 °C-35 °C) for a duration of 28 days. Each crate was populated with 9-month-old plants of uniform size, initially cultivated in the greenhouse before being transplanted into crates containing 100 % crude-oil sludge with an initial TPH concentration of 37,554 mg/kg for the treatment phase. TPH removal rates were assessed after 14, 21, and 28 days of exposure, resulting in removal rates of 67 %, 74 %, and 75 %, respectively. The highest concentration of rhizobacteria recorded in both sample (with contaminants and without contaminants) were 5.56 × 104 and 5.72 × 104 CFU/mL respectively. Furthermore, TPH extraction from both stems and roots of S. grossus was analysed, revealing the highest TPH concentration of 15,319 mg/kg and about 8000 mg/kg of TPH at day 28 by roots and stem sample respectively. In conclusion, S. grossus demonstrated substantial potential in effectively mitigating the toxicity of TPH in real crude-oil sludge contamination scenarios.
    MeSH terms: Biodegradation, Environmental*; Hydrocarbons/analysis; Hydrocarbons/metabolism; Sewage/microbiology; Cyperaceae; Petroleum Pollution
  11. Badaruddin IA, Othman H, Wan Shuaib WMA, Che Yusof MZ, Othman S, Anuar Ali MN, et al.
    Asia Pac J Public Health, 2024 Nov;36(8):806-809.
    PMID: 39318114 DOI: 10.1177/10105395241282621
  12. Taylor-Blair HC, Siu ACW, Haysom-McDowell A, Kokkinis S, Bani Saeid A, Chellappan DK, et al.
    Sci Total Environ, 2024 Dec 01;954:176413.
    PMID: 39322084 DOI: 10.1016/j.scitotenv.2024.176413
    Inhalation of particulate matter (PM), one of the many components of air pollution, is associated with the development and exacerbation of chronic respiratory diseases, such as chronic obstructive pulmonary disease (COPD). COPD is one of the leading causes of global mortality and morbidity, with a paucity of therapeutic options and a significant contributor to global health expenditure. This review aims to provide a mechanistic understanding of the cellular and molecular pathways that lead to the development of COPD following chronic PM exposure. Our review describes how the inhalation of PM can lead to lung parenchymal destruction and cellular senescence due to chronic pulmonary inflammation and oxidative stress. Following inhalation of PM, significant increases in a range of pro-inflammatory cytokines, mediated by the nuclear factor kappa B pathway are reported. This review also highlights how the inhalation of PM can lead to deleterious chronic oxidative stress persisting in the lung post-exposure. Furthermore, our work summarises how PM inhalation can lead to airway remodelling, with increases in pro-fibrotic cytokines and collagen deposition, typical of COPD. This paper also accentuates the interconnection and possible synergism between the pathophysiological mechanisms leading to COPD. Our work emphasises the serious health consequences of PM exposure on respiratory health. Elucidation of the cellular and molecular mechanisms can provide insight into possible therapeutic options. Finally, this review should serve as a stark reminder of the need for genuine action on air pollution to decrease the associated health burden on our growing global population.
    MeSH terms: Humans; Cytokines/metabolism; Oxidative Stress*; Inhalation Exposure/adverse effects; Particulate Matter*
  13. Spooner R, Bird JM, Irigoras Izagirre N, Clemente R, Fernandez Fueyo E, Budworth G, et al.
    Psychophysiology, 2024 Dec;61(12):e14689.
    PMID: 39323015 DOI: 10.1111/psyp.14689
    Previous evidence suggests males and females differ with respect to interoception-the processing of internal bodily signals-with males typically outperforming females on tasks of interoceptive accuracy. However, interpretation of existing evidence in the cardiac domain is hindered by the limitations of existing tools. In this investigation, we pooled data from several samples to examine sex differences in cardiac interoceptive accuracy on the phase adjustment task, a new measure that overcomes several limitations of the existing tools. In a sample of 266 individuals, we observed that females outperformed males, indicative of better cardiac interoceptive accuracy, but had lower confidence than males. These results held after controlling for sex differences in demographic, physiological and engagement factors. Importantly, these results were specific to the measure of cardiac interoceptive accuracy. No sex differences were observed for individuals who completed the structurally identical screener task, although a similar pattern of results was observed in relation to confidence. These surprising data suggest the presence of a female advantage for cardiac interoceptive accuracy and potential differences in interoceptive awareness (metacognition). Possible reasons for mixed results in the literature, as well as implications for theory and future research, are discussed.
    MeSH terms: Metacognition/physiology; Adolescent; Adult; Female; Humans; Male; Sex Characteristics*; Young Adult
  14. Liang J, Abdullah ALB, Li Y, Wang H, Xiong S, Han M
    Sci Total Environ, 2024 Dec 01;954:176530.
    PMID: 39332714 DOI: 10.1016/j.scitotenv.2024.176530
    With the widespread use of plastic products, microplastics and nanoplastics have emerged as prevalent pollutants in coastal aquatic ecosystems. Parasesarma pictum, a common estuarine crab species, was selected as a model organism. P. pictum was exposed to polystyrene (PS) particles of sizes 80 nm (80PS), 500 nm (500PS), and 1000 nm (1000PS), as well as to clean seawater (CK) for 21 days. Histological and fluorescent staining results showed that PS particles of all three sizes induced hepatopancreatic nuclear pyknosis, cell junction damage, and necrosis. The degree of damage was observed as 1000PS > 80PS > 500PS. Transcriptomic analysis revealed that major differentially expressed genes (DEGs) were associated with cellular processes, membrane components, and catalytic activity. The respiratory chain disruptions and immune exhaustion induced by 1000PS were notably stronger than those by 80PS and 500PS. Additionally, necrosis caused hepatopancreas injury in P. pictum rather than apoptosis or autophagy after long-term PS particle exposure. Furthermore, PS particles of all three sizes inhibited innate immunity, while the complement pathway was not significantly affected in the 80PS group. This study elucidated potential distinctions in how plastic particles of varying sizes (nanoplastics, microplastics, and micro/nanoplastics) impact P. pictum, providing a reference for toxicological mechanism research on microplastics and nanoplastics in aquatic organisms. Future research should focus on exploring long-term effects and potential mitigation strategies for microplastics and nanoplastics of more types and a wider range of particle size pollution in aquatic environments.
    MeSH terms: Animals; Particle Size*; Nanoparticles/toxicity
  15. Khaw WF, Chan YM, Alias N, Tan L, Nasaruddin NH, Tham SW, et al.
    Asia Pac J Public Health, 2024 Nov;36(8):746-752.
    PMID: 39342425 DOI: 10.1177/10105395241283108
    The relationship between socioeconomic status (SES) and health outcomes has garnered significant attention. However, there is a limited amount of research exploring the association between SES and the risk of metabolic syndrome in Malaysian adults. This study aimed to determine the association between SES and risk of hypertension, diabetes and obesity. By using data from the National Health and Morbidity Survey (NHMS), SES was derived through principal component analysis involving six variables. Two different SES components were identified and labeled as "social status" and "wealth status." Among the participants, 36% were diagnosed with hypertension, 18% with obesity, and 21% with diabetes. Adults with high wealth and social status showed a significantly increased risk of obesity. Meanwhile, high social status was significantly associated with a reduction in the risk of hypertension and diabetes. A comprehensive understanding of the associations between SES and noncommunicable diseases could facilitate initiatives that promote healthy lifestyle behaviors, thereby enhancing the holistic well-being of Malaysians.
    MeSH terms: Adult; Aged; Female; Health Surveys*; Humans; Malaysia/epidemiology; Male; Middle Aged; Risk Factors; Social Class*; Young Adult
  16. Mohd Hatta H, Musa KI, Mohd Fuzi NMH, Moraga P
    Asia Pac J Public Health, 2024 Nov;36(8):738-745.
    PMID: 39344715 DOI: 10.1177/10105395241286118
    Leptospirosis and enteric fever are prevalent tropical acute bacterial febrile illnesses in Kelantan, Malaysia, that exhibit overlapping features and shared transmission dynamics, yet their spatial relationship remains understudied. This study aimed to analyze their spatial distribution, investigating potential interactions and intersecting patterns. A total of 212 laboratory-confirmed cases of enteric fever and 1106 of leptospirosis between 2016 and 2022, were retrieved from the national e-Notifikasi registry. Point pattern analysis revealed clustering of both diseases in the northern region, but leptospirosis was predominant in the south, exhibiting higher spatial risk. Seven co-infection cases were identified in overlapping hotspot areas. Spatial dependence between the diseases was identified within 4 km distance on average, with varying patterns over time and regions. Recognizing spatial dependence has implications for accurate diagnosis, timely intervention, and tailored public health strategies. The findings underscore the need for multi-disease interventions to address shared risk factors and co-infections in similar geographical contexts.
    MeSH terms: Adolescent; Adult; Aged; Child; Child, Preschool; Female; Humans; Infant; Malaysia/epidemiology; Male; Middle Aged; Registries*; Disease Notification/statistics & numerical data; Young Adult; Spatial Analysis
  17. Kafle S, Jha N, Bhandary S, Ravi Shankar P
    JNMA J Nepal Med Assoc, 2024 Jun 30;62(275):427-432.
    PMID: 39369416 DOI: 10.31729/jnma.8651
    INTRODUCTION: Counterfeit medicines are a significant problem globally. In a developing country like Nepal, community pharmacists play an important role in dispensing medicines. The study was done to assess community pharmacists' perceived prevalence, awareness and attitude towards counterfeit medicines in Kathmandu valley.  Methods: A cross-sectional study design was used. Data was collected conveniently from Kathmandu, Bhaktapur, and Lalitpur districts in March 2022 after obtaining ethical clearance from Nepal Health Research Council (reference no. 2200) and taking written informed consent from Community Pharmacists.  Results: Among the 343 pharmacists who participated, 250 (72.89%) were from Kathmandu, 57 (16.62%) were from Lalitpur, and 36 (10.50%) from Bhaktapur. Most 252 (73.47%) were aged between 20 to 30 years, 222 (64.72%) were male, 239 (69.68%) had done a Diploma in Pharmacy, 201 (58.60%) had working experience of more than 5 years and 342 (99.71%) had done their education in Nepal. Their median perceived prevalence of counterfeit drugs was 10.00% but only 2.30% had clear knowledge of such practice. 332 (96.79%) believed that actions should be taken against community pharmacists dispensing counterfeit drugs, 325 (94.75%) believed that pharmacists who dispense counterfeit medicines are unprofessional; 338 (98.54%) stated that there should be strong law against counterfeit medicine sales.

    CONCLUSIONS: Median perceived prevalence of counterfeit medicines was 10.00% but only 2.30% were aware of counterfeit medicine dispensing. Out of 343 pharmacists, 332 (96.79%) mentioned that  action should be taken against those pharmacists knowingly dispensing counterfeit medicines and 338 (98.54%) stated that there should be strong law against counterfeit medicines.

    MeSH terms: Adult; Attitude of Health Personnel; Community Pharmacy Services/standards; Cross-Sectional Studies; Female; Humans; Health Knowledge, Attitudes, Practice*; Male; Middle Aged; Nepal; Surveys and Questionnaires; Prevalence; Young Adult; Counterfeit Drugs*
  18. Ho JJ, Kidman AM, Chua B, Chang G, Fiander M, Davis PG
    Cochrane Database Syst Rev, 2024 Oct 11;10(10):CD000143.
    PMID: 39392114 DOI: 10.1002/14651858.CD000143.pub2
    BACKGROUND: Preterm infants who are extubated following a period of invasive ventilation via an endotracheal tube are at risk of developing respiratory failure, leading to reintubation. This may be due to apnoea, respiratory acidosis, or hypoxia. Historically, preterm infants were extubated to head box oxygen or low-flow nasal cannulae. Support with non-invasive pressure might help improve rates of successful extubation in preterm infants by stabilising the upper airway, improving lung function, and reducing apnoea. This is an update of a review first published in 1997 and last updated in 2003.

    OBJECTIVES: To determine whether nasal continuous positive airway pressure (NCPAP), applied immediately after extubation of preterm infants, reduces the incidence of extubation failure and the need for additional ventilatory support, without clinically important adverse events.

    SEARCH METHODS: We searched CENTRAL, MEDLINE, Embase, and trial registries on 22 September 2023 using a revised strategy. We searched conference abstracts and the reference lists of included studies and relevant systematic reviews.

    SELECTION CRITERIA: Eligible trials employed random or quasi-random allocation of preterm infants undergoing extubation. Eligible comparisons were NCPAP (delivered by any device and interface) versus head box oxygen, extubation to room air, or any other form of low-pressure supplemental oxygen. We grouped the comparators under the term no continuous positive airway pressure (no CPAP).

    DATA COLLECTION AND ANALYSIS: Two review authors independently assessed the risk of bias and extracted data from the included studies. Where studies were sufficiently similar, we performed a meta-analysis, calculating risk ratios (RRs) with their 95% confidence intervals (CIs) for dichotomous data. For the primary outcomes that showed an effect, we calculated the number needed to treat for an additional beneficial outcome (NNTB). We used the GRADE approach to assess the certainty of the evidence for clinically important outcomes.

    MAIN RESULTS: We included nine trials (with 726 infants) in the quantitative synthesis of this updated review. Eight studies were conducted in high-income countries between 1982 and 2005. One study was conducted in Chile, which was classified as upper-middle income at the time of the study. All studies used head box oxygen in the control arm. Risk of bias was generally low. However, due to the inherent nature of the intervention, no studies incorporated blinding. Consequently, the neonatal intensive care unit staff were aware of the assigned group for each infant, and we judged all studies at high risk of performance bias. However, we assessed blinding of the outcome assessor (detection bias) as low risk for seven studies because they used objective criteria to define both primary outcomes. NCPAP compared with no CPAP may reduce the risk of extubation failure (RR 0.62, 95% CI 0.51 to 0.76; risk difference (RD) -0.17, 95% -0.23 to -0.10; NNTB 6, 95% CI 4 to 10; I2 = 55%; 9 studies, 726 infants; low-certainty evidence) and endotracheal reintubation (RR 0.79, 95% 0.64 to 0.98; RD -0.07, 95% CI -0.14 to -0.01; NNTB 15, 95% CI 8 to 100; I2 = 65%; 9 studies; 726 infants; very low-certainty evidence), though the evidence for endotracheal reintubation is very uncertain. NCPAP compared with no CPAP may have little or no effect on bronchopulmonary dysplasia, but the evidence is very uncertain (RR 0.89, 95% CI 0.47 to 1.68; RD -0.03, 95% CI -0.22 to 0.15; 1 study, 92 infants; very low-certainty evidence). No study reported neurodevelopmental outcomes.

    AUTHORS' CONCLUSIONS: NCPAP may be more effective than no CPAP in preventing extubation failure in preterm infants if applied immediately after extubation from invasive mechanical ventilation. We are uncertain whether it can reduce the risk of reintubation or bronchopulmonary dysplasia. We have no information on long-term neurodevelopmental outcomes. Although there is only low-certainty evidence for the effectiveness of NCPAP immediately after extubation in preterm infants, we consider there is no need for further research on this intervention, which has become standard practice.

    MeSH terms: Humans; Infant, Newborn; Infant, Premature*; Intubation, Intratracheal; Oxygen Inhalation Therapy/methods; Respiratory Distress Syndrome, Newborn/prevention & control; Respiratory Distress Syndrome, Newborn/therapy; Ventilator Weaning/methods; Bias (Epidemiology); Randomized Controlled Trials as Topic; Airway Extubation*
  19. Elsayed N
    Int J Pharm, 2024 Dec 05;666:124819.
    PMID: 39424084 DOI: 10.1016/j.ijpharm.2024.124819
    Lung inflammation involves the activation of immune cells and inflammatory mediators in response to injury and infection. When inflammation persists, fibroblasts, which are resident lung cells, become activated, leading to pulmonary fibrosis (PF), abnormal wound healing, and long-term damage to the alveolar epithelium. This persistent inflammation and fibrosis can also elevate the risk of lung cancer, emphasizing the need for innovative treatments. Current therapies, such as inhaled corticosteroids (ICS) and chemotherapy, have significant limitations. Although conventional nanoparticles (NPs) provide a promising avenue for treating lung disorders, they have limited selectivity and stability. Polyethylene glycol (PEG) grafting can prevent NP aggregation and phagocytosis, thus prolonging their circulation time. When combined with targeting ligands, PEGylated NPs can deliver drugs precisely to specific cells or tissues. Moreover, pH-sensitive NPs offer the advantage of selective drug delivery to inflammatory or tumor-acidic environments, reducing side effects. These NPs can change their size, shape, or surface charge in response to pH variations, improving drug delivery efficiency. This review examines the techniques of PEGylation, the polymers used in pH-sensitive NPs, and their therapeutic applications for lung inflammation, fibrosis, and cancer. By harnessing innovative NP technologies, researchers can develop effective therapies for respiratory conditions, addressing unmet medical needs and enhancing patient outcomes.
    MeSH terms: Animals; Humans; Hydrogen-Ion Concentration; Lung Diseases/drug therapy; Lung Neoplasms/drug therapy; Gene Transfer Techniques; Nanoparticles*
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