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Dyslipidaemia is associated with chronic low-grade inflammation and immune dysfunction, but the immunological effects of dietary phytosterols in humans remain unclear. We conducted a secondary analysis of an outcome-assessor-blinded, randomised controlled feeding trial to evaluate the effects of a high-phytosterol (HPS) diet, using phytosterol-enriched corn–wheat germ blended oil (CWGO), compared with a low-phytosterol (LPS) diet using peanut oil, on systemic inflammatory markers, humoural immune markers and peripheral blood lymphocyte subsets in Chinese adults with dyslipidaemia. After a 2-week run-in period, 104 participants were randomised to the HPS group (n 52) or the LPS group (n 52) for 12 weeks. In intention-to-treat analyses, the HPS group had a higher CD4+:CD8+ ratio at 12 weeks than the LPS group (adjusted mean difference: 0·561; 95 % CI 0·060, 1·063; P = 0·03) and a lower CD8+ T-cell count (adjusted mean difference: −116·315 cells/μl; 95 % CI −215·781, –16·849; P = 0·02). No significant between-group differences were observed for systemic inflammatory markers, humoral immune markers or most other lymphocyte subset outcomes. In per-protocol analyses, the difference in CD4+:CD8+ ratio remained significant, whereas the reduction in CD8+ T-cell count was attenuated. These exploratory findings suggest that a 12-week phytosterol-enriched CWGO intervention may be associated with changes in T-cell subset balance in adults with dyslipidaemia, although the results should be interpreted cautiously given the exploratory nature of this secondary analysis.
Parking in narrow spaces presents significant challenges, often resulting in deviations between vehicle’s final parking state (FPS) and normal FPS. These deviations can cause partial intrusion into the target parking spots, increasing the risk of collisions in the parking process and potentially making the parking spots unusable. To address these issues, this paper proposes an optimization method for both the parking path and FPS in narrow and non-ideal vertical parking scenarios. Initially, a partition-based calculation method for the minimum distance between the vehicle and obstacles (DBVO) was developed to quantitatively assess the impact of intrusion on parking safety. Following this, a predefined geometric set of clothoids is used to smooth curvature discontinuities in the parking path, and a four-phase parking path pattern is devised. Subsequently, a preferred method for parking manners is proposed by analyzing the effects of parking direction and maneuvers on spatial requirements. Finally, a two-step parking path optimization method is presented with the framework integrating both online and offline calculations, using the minimum DBVO field and a predefined path pattern. Comparative experiments demonstrate that this method could enhance the proportion of available intrusion scenarios, increase the success rate of effective path acquisition, and improve the overall quality of parking paths.
An experimental study was conducted to investigate the characteristics of unsteady oblique shock trains in a constant-area rectangular duct under an asymmetric incoming boundary layer. High-speed schlieren techniques and high-frequency pressure measurements were utilised in this study. The results indicate that the oblique shock train mainstream leans significantly towards the thin-boundary-layer side. Under downstream periodic excitation, the shock train moves periodically, and its shape changes during the movement. This phenomenon occurs to match the downstream pressure by altering the relative Mach number in front of the shock train, with the average pressure rise slope along the thick-boundary-layer side changing periodically. Additionally, unlike a normal shock train, the pressure rise distribution along the thick-boundary-layer side is nearly linear, and the correlation coefficients between the transducers on this side and the most downstream transducer are higher than those on the thin-boundary-layer side. Due to differences in flow structure and pressure rise distribution, the existing amplitude prediction model proposed by Xiong et al. (J. Fluid Mech. vol. 846, 2018, pp. 240–262) for the unsteady normal shock train is no longer applicable to the unsteady oblique shock train. Therefore, a new prediction model is derived and verified by experiments. Moreover, it is found that using only the downstream pressure transducer information on the thick-boundary-layer side can effectively predict the amplitude of the shock-train motion. Combined with the prediction model, a novel method is proposed to estimate the amplitude of the shock-train motion conveniently.
In traumatic mass casualty incidents (MCIs), accurate triage is essential for prioritizing care and managing resources effectively. This study assesses the accuracy of the START (Simple Triage and Rapid Treatment) method across different responder variables, including occupation, experience, gender, and unit. Additionally, it compares the accuracy rates for each triage category and the time spent. The study further evaluates the execution rate of critical interventions, such as hemorrhage control and airway opening, which are essential steps within the START method.
Methods:
This study utilized AI-generated realistic images of injured patients to create a high-fidelity simulation environment. Participants included physicians, nurses, and emergency medical technicians (EMTs) with varying levels of experience (<2 years, 2-5 years, >5 years) and from different units (emergency department, non emergency, and fire stations). During the simulation, evaluators interacted face-to-face with participants, acting as standardized patients (SPs) to support the triage decision-making process. Participants assessed 30 simulated patients within a 30-minute timeframe, making triage color judgments based on START criteria. Bleeding control materials and nasopharyngeal airways were provided for simulated interventions.
Results:
On average, participants correctly assessed 28.04 cases, achieving a mean accuracy rate of 93.71%. The average time spent on triage was 845.28 seconds. Triage accuracy by color category was as follows: green (94%), yellow (96%), red (89%), and black (100%). Analysis by occupation and experience indicated that experienced participants and those in emergency-related roles performed more accurately, particularly in the red and black categories.
Conclusion:
This study highlights variability in START triage accuracy based on responder occupation and experience. The use of AI-generated injury images facilitated realistic training, suggesting that such simulations could enhance competency in triage skills, especially in hemorrhage and airway management. Enhanced training for responders from non-emergency units or with limited experience may lead to more consistent triage accuracy and improved MCI response.
Hualien County, stretching 137.5 kilometers, is characterized by mountainous terrain that complicates external transportation. Medical resources are mainly concentrated in northern Hualien, and disaster relief efforts face huge challenges. To this end, the Hualien Health Bureau established the Hualien Disaster Medical Assistance Team (DMAT) and developed the mobile application system iDMAT. The team collaborates closely with the Fire Department and receives logistical support from the NGO Tzu Chi Foundation to ensure swift and effective rescue operations.
Methods:
1. Inter-agency Collaboration: Hualien DMAT is composed of medical and administrative staff from eight hospitals and works jointly with the Fire Department. EMTs arrive at the disaster scene first, setting up casualty collection points in cold zones. Hualien DMAT’s advance team then joined them to enhance patient care. Tzu Chi Foundation maintains logistics. 2. DMAT Advance Team: This team consists of one physician, two nurses, and two administrative staff members. They can quickly reach the disaster scene and initiate preliminary rescue actions, meeting the flexible needs of multi-site disasters. 3. iDMAT Development: DMAT members use the iDMAT APP to log disaster assessments and patient information in real-time. By scanning patient wristband QR codes, teams track triage, treatment, and transfer progress. All data is uploaded to the cloud, ensuring information accuracy and continuity.
Results:
During the 2021 Taroko train accident, the 2022 Taitung earthquake, and the 2024 Hualien 0403 earthquake, the DMAT advance team swiftly conducted on-site assessments, reporting directly to the Health Bureau via iDMAT. This real-time data sharing enables disaster relief decisions to be made promptly, while hospitals receive patient updates in advance, greatly enhancing treatment efficiency.
Conclusion:
Hualien’s integrated model of inter-agency collaboration and iDMAT application reduces response times and ensures continuous patient care, alleviating healthcare provider burdens. This model effectively improves disaster response capability and highlights the value of real-time information management in disaster relief.
Effective disaster medical response hinges on timely data management and efficient resource allocation. The Hualien Disaster Medical Assistance Team (DMAT) in Taiwan functions as a mobile emergency department during disasters, integrating resources from health bureaus, emergency centers, hospitals, and private organizations. Previous disaster responses revealed significant challenges in data capture and real-time management; reliance on frequent calls and messages led to information errors, overburdened medical staff, and diminished rescue efficiency.
Methods:
To address these issues, Hualien DMAT developed the iDMAT system, a digital platform designed to simplify medical record keeping and data management during disaster response. The user operates the application downloaded on the mobile phone. Feedback and operational data from users have been collected during exercises since 2023 and during the Hualien earthquake on April 3, 2024.
Results:
Implementation of the iDMAT system significantly improved operational efficiency. The team members reduced the average medical record completion time from 5.89 minutes (paper-based) to 2.68 minutes, achieving a 45% reduction. Approximately 78.57% of records were completed within 2–3 minutes. Data integration time decreased dramatically from 35.91 minutes to 6.80 minutes, with 70% of cases integrated within 3 minutes—a fivefold increase in efficiency.
Conclusion:
By providing accurate and timely data to government agencies, the iDMAT system enhanced on-site medical care and resource allocation, facilitating rapid decision-making and resource deployment. These improvements led to better patient outcomes and reduced mortality during disasters. The system is scalable to other out-of-hospital care scenarios, such as major accidents and large-scale events. Future developments include integrating international standards like FHIR to promote cross-border collaboration and establishing a seamless care continuum among hospitals, fire departments, and ambulances.
Direct numerical simulations with two-way coupled Lagrangian tracking are carried out to study the bubble preferential concentration and the flow field modification. Simulations are conducted in an upward vertical turbulent channel driven by a constant pressure gradient, corresponding to a friction Reynolds number $Re_{\tau 0}=180$. Micro-sized bubbles with diameters ranging from 0.72 to 1.43 wall units are considered. Competition between lift force and wall-lift force in the wall-normal direction leads to significant near-wall bubble accumulation and directly results in distinct preferential concentration patterns across the channel. Below (above) the peak concentration height, the wall-lift (lift) force dominates, driving bubbles to accumulate in regions of high-speed sweep (low-speed ejection) events. In the vicinity of the wall, the wall-normal lift force exhibits a strong correlation with the local streamwise flow velocity, further reinforcing the preferential concentration of bubbles in high-speed regions. Additionally, bubbles show a strong preference for the low-enstrophy and high-dissipation nodal topologies. Furthermore, small bubbles primarily accumulate in the vicinity of the wall, reducing the work done on the flow and leading to a decrease in bulk velocity and turbulence statistics. In contrast, the turbulence statistics of large bubbles are nearly identical to those of the unladen flow. The impact of large bubbles on the flow field primarily manifests as an effective increase in the mean pressure gradient. These findings demonstrate that bubbles in the upward vertical channel flow exhibit strong preferential concentration behaviours, whereas their ability to modulate turbulence remains limited.
The impact of inter-hospital transfer before endovascular thrombectomy (EVT) on short-term outcomes has been reported, but its effect on long-term outcomes remains unclear. We examined long-term clinical outcomes after EVT, stratified by whether patients underwent inter-hospital transfer.
Methods:
We conducted a population-based cohort study using linked administrative data from Ontario, Canada (2017–2023). We included all community-dwelling residents hospitalized with acute ischemic stroke who received EVT. Inter-hospital transfer was defined as any transfer from a non-comprehensive stroke center (CSC) to a CSC before EVT. The primary outcome was all-cause mortality at maximum follow-up, assessed using propensity score-weighted hazard ratios.
Results:
Of 68523 ischemic stroke patients, 5394 (7.9%) underwent EVT, with 42.9% transferred before EVT. Direct-to-CSC patients were older, had higher rates of atrial fibrillation and dyslipidemia and were more likely to reside in urban areas. Propensity score-weighted analysis comparing transferred versus direct-to-CSC patients showed no difference in all-cause mortality, but the hazard ratio varied over time, violating the proportional hazards assumption. Transfer was associated with higher early mortality than direct-to-CSC, which declined over time, with mortality lower after 6.3 months, remaining below 1 over prolonged follow-up out to 34.6 months. Transferred patients were more likely to be admitted to long-term care (aHR 1.17, 95% CI: 1.03–1.33), but there was no significant difference in recurrent stroke.
Conclusions:
Nearly half of EVT patients underwent inter-hospital transfer, which showed a time-varying association with all-cause mortality, with early risk that attenuated after 6.3 months and reversed over time.
This study aimed to develop a disaster triage training program designed to enhance knowledge, skills, and resilience for disasters among nurses.
Method
A randomized controlled trial was conducted at two government hospitals in Indonesia. One hundred and eight nurses were randomly assigned in equal numbers to the experimental and control groups. The experimental group received a 4-hour triage training focused on mass casualty incidents. Disaster triage knowledge, skills, and resilience were assessed at three time points: before, immediately after, and 1 month following the intervention. Generalized Estimating Equations were used to evaluate the effectiveness of the training program.
Results
The results of this study revealed that nurses in the experimental group showed significantly greater improvements in disaster triage knowledge, skills, and resilience compared to those in the control group at 2 post-test time points. In addition, feedback from trained nurses emphasized its relevance to local disaster scenarios, such as earthquakes and floods, and highlighted the value of hands-on practice and easily accessible learning materials.
Conclusions
The study demonstrates that disaster triage training can effectively enhance nurses’ preparedness for disasters. It is recommended that health care institutions integrate disaster-related content into regular on-the-job training programs for nurses and assess its effectiveness.
Magnetohydrodynamic turbulence with Hall effects is ubiquitous in heliophysics and plasma physics. Direct numerical simulations reveal that, when the forcing scale is comparable to the ion inertial scale, the Hall effects induce remarkable cross-helicity. It then suppresses the cascade efficiency, leading to the accumulation of large-scale magnetic energy and helicity. The process is accompanied by the disruption of current sheets through the entrainment by vortex tubes or the excitation of whistler waves. Using the solar wind data from the Parker Solar Probe, the numerical findings are separately confirmed. These findings provide new insights into the emergence of large-scale solar wind turbulence driven by helical fields and Hall effects.
Patients with stroke or transient ischemic attack (TIA) are at high early risk of mortality and morbidity. Current risk prediction tools focus on patients after hospital discharge but not on those surviving to outpatient follow-up. We examined whether demographic and medical history data could predict 1-year stroke recurrence and mortality, among those discharged alive and event-free for 90 days after stroke and 1 day after TIA.
Methods:
Data were obtained from the Ontario Stroke Registry (13,848 stroke and 13,059 TIA patients) and linked to administrative databases. Two-thirds of each cohort were used for model derivation and one-third for validation. Multivariable regression models were used to predict stroke recurrence and all-cause mortality.
Results:
There were 238 (2.71%) recurrent strokes in the ischemic stroke and 298 (3.44%) in the TIA cohorts at one year. Increasing age and previous stroke/TIA were associated with an increased risk of recurrent stroke in both cohorts. A higher modified Rankin Scale and diabetes were associated with an increased risk of recurrent stroke in the stroke cohort and heart failure, smoking and discharge location in the TIA cohort. Time-dependent areas under the curve were modest, 0.59 (0.54–0.64) and 0.59 (0.55–0.64) for the stroke and TIA validation cohorts, respectively. C-statistics from derivation and validation cohorts for mortality ranged from 0.74–0.78.
Conclusion:
The predictive accuracy of the models was quite low after accounting for several risk factors. Additional risk factors associated with stroke recurrence for people seen in outpatient stroke clinics, and innovative approaches to individualized secondary prevention are needed.
Transoral robotic surgery has gained much recognition in the surgical management of obstructive sleep apnoea, allowing for improved surgical access and precise dissection around the narrow surgical field. However, it is associated with a steeper learning curve and may give rise to significant morbidity especially amongst less experienced surgeons.
Methods
Through a comprehensive literature search, this review summarises patient selection for transoral robotic surgery as well as peri-operative considerations and management.
Results
Apart from technical mastery, successful transoral robotic surgery require for the surgeon to be proficient with navigating the entire care continuum beginning with patient selection to management of post-operative complications.
Conclusion
Transoral robotic surgery remains a promising tool for surgical treatment of patients with obstructive sleep apnoea. This review provides an overview of the surgical application of transoral robotic surgery in obstructive sleep apnoea, together with practical guidance for the sleep surgeon.
CD33 has been implicated in the pathogenesis of Alzheimer’s disease primarily through its role in inhibiting the clearance of beta-amyloid (Aβ). However, genetic studies yield mixed results and it is unclear whether the impact of CD33 is specific to Alzheimer’s disease or related to broader neurodegenerative processes. Interestingly, CD33 has also been shown to interact with the hepatitis B (HBV) and C viruses (HCV).
Aims
This study aims to investigate the effects of CD33 single-nucleotide polymorphisms (SNPs) on cognitive functions across diverse populations, including healthy controls, individuals with chronic HBV or HCV and those diagnosed with Parkinson’s disease.
Method
We genotyped CD33 SNPs in 563 participants using the Affymetrix platform. Participants’ cognitive functions were cross-sectionally assessed using a neuropsychological test battery spanning six domains.
Results
Our analysis revealed that CD33 SNP variations had no significant cognitive impact on healthy individuals or Parkinson’s disease patients. However, chronic HBV and HCV patients exhibited significant cognitive differences, particularly in memory, related to CD33 SNP genotypes. Moderation analysis indicated a heightened influence of CD33 SNPs on cognitive functions in chronic HBV and HCV individuals. Our data also suggest that inflammation severity may modulate the cognitive effects in hepatitis patients with specific CD33 SNPs.
Conclusions
This study highlights the importance of CD33 SNPs in cognitive outcomes, emphasising their role in the context of chronic viral hepatitis. It contributes to understanding the cognitive profiles influenced by CD33 SNPs and posits CD33’s potential contribution to neurodegenerative disease progression, potentially intensified by HBV/HCV-induced inflammation.
Background: Association between age, frailty, and the receipt of thrombectomy for acute ischemic stroke is not well understood. Methods: We conducted a population-based retrospective cohort study of adults hospitalized with an ischemic stroke between 2018 and 2022 in Ontario, Canada. In sex-stratified models, we studied whether frailty (based on hospital-based frailty index: mild, moderate and severe) modified the association between age and thrombectomy by using interaction terms in multivariable modified Poisson regression models. Results: Among 59,346 patients (median age 75 years, 47.0% female) with ischemic stroke 4,454 (7.5%) received thrombectomy, with no sex differences in this treatment. In both sexes, increasing age was associated with decreased use of thrombectomy (adjusted risk ratio [aRR] for every 5-year increase, female = 0.91; 0.89-0.92; male = 0.92; 0.90-0.94). Frailty was not associated with thrombectomy in females (aRR high vs. low frailty = 0.86; 0.68-1.10) or males (aRR high vs. low frailty = 1.10; 0.87-1.39). Furthermore, the interaction between age and frailty was not significant for either sex. Conclusions: Frailty was not associated with thrombectomy in either sex, and it did not modify the association between age and thrombectomy, suggesting a greater role of chronological age compared to frailty in thrombectomy decisions in ischemic stroke patients.
Background: Stroke survivors have a higher risk of depression and suicide, but how hospitalization for major depression modifies the risk of suicide after stroke is not well-known. Methods: We conducted a population-based matched cohort study of adults hospitalized with first-ever stroke between 2008 to 2017 matched 1:1 to the general Ontario population on age, sex, neighbourhood-level income, rurality, and comorbidities. Patients with major depression or deliberate self-harm prior to index event were excluded from both groups. We used cause-specific proportional hazards models to evaluate the association between stroke and suicide (defined as self-harm or death by suicide) and used an interaction term to assess effect modification of depression on stroke-suicide association. Results: We included 64,719 matched pairs of patients with stroke and without (45.5% female, mean age 71.4 years). Compared to matched controls, stroke survivors had a higher rate of suicide (11.1 vs. 3.2, HR 2.87 [2.35-3.51]). Depression was associated with a higher rate of suicide in both groups (HR 13.8 [8.82-21.61]). The interaction between stroke and depression was not significant (Pstroke*depression = 0.51). Conclusions: Hospitalization for depression does not modify the rate of suicide after stroke, suggesting the need to better understand the pathways leading to suicide after stroke.
The cumulative effects of long-term exposure to pandemic-related stressors and the severity of social restrictions may have been important determinants of mental distress in the time of COVID-19.
Aim
This study aimed to investigate mental health among a cohort of Chinese university students over a 28-month period, focusing on the effects of lockdown type.
Methods
Depression, anxiety, stress and fear of COVID-19 infection were measured ten times among 188 Chinese students (females 77.7%, meanage = 19.8, s.d.age = 0.97), every 3 months: from prior to the emergence of COVID-19 in November 2019 (T1) to March 2022 (T10).
Results
Initially depression, anxiety and stress dipped from T1 to T2, followed by a sudden increase at T3 and a slow upward rise over the remainder of the study period (T3 to T10). When locked down at university, participants showed greater mental distress compared with both home lockdown (d = 0.35–0.48) and a no-lockdown comparison period (d = 0.28–0.40). Conversely, home lockdown was associated with less anxiety and stress (d = 0.19 and 0.21, respectively), but not with depression (d = 0.13) compared with a no-lockdown period.
Conclusions
This study highlights the cumulative effects of exposure to COVID-19 stressors over time. It also suggests that the way in which a lockdown is carried out can impact the well-being of those involved. Some forms of lockdown appear to pose a greater threat to mental health than others.
Stroke clinical registries are critical for systems planning, quality improvement, advocacy and informing policy. We describe the methodology and evolution of the Registry of the Canadian Stroke Network/Ontario Stroke Registry in Canada.
Methods:
At the launch of the registry in 2001, trained coordinators prospectively identified patients with acute stroke or transient ischemic attack (TIA) at comprehensive stroke centers across Canada and obtained consent for registry participation and follow-up interviews. From 2003 onward, patients were identified from administrative databases, and consent was waived for data collection on a sample of eligible patients across all hospitals in Ontario and in one site in Nova Scotia. In the most recent data collection cycle, consecutive eligible patients were included across Ontario, but patients with TIA and those seen in the emergency department without admission were excluded.
Results:
Between 2001 and 2013, the registry included 110,088 patients. Only 1,237 patients had follow-up interviews, but administrative data linkages allowed for indefinite follow-up of deaths and other measures of health services utilization. After a hiatus, the registry resumed data collection in 2019, with 13,828 charts abstracted to date with a focus on intracranial vascular imaging, identification of intracranial occlusions and treatment with thrombectomy.
Conclusion:
The Registry of the Canadian Stroke Network/Ontario Stroke Registry is a large population-based clinical database that has evolved throughout the last two decades to meet contemporary stroke needs. Registry data have been used to monitor stroke quality of care and conduct outcomes research to inform policy.
Acute stroke treatments are highly time-sensitive, with geographical disparities affecting access to care. This study examined the impact of driving distance to the nearest comprehensive stroke center (CSC) and rurality on the use of thrombectomy or thrombolysis in Ontario, Canada.
Methods:
This retrospective cohort study used administrative data to identify adults hospitalized with acute ischemic stroke between 2017 and 2022. Driving time from patients’ residences to the nearest CSC was calculated using the Ontario Road Network File and postal codes. Rurality was categorized using postal codes. Multivariable logistic regression, adjusted for baseline differences, estimated the association between driving distance and treatment with thrombectomy (primary outcome) or thrombolysis (secondary outcome). Driving time was modeled as a continuous variable using restricted cubic splines.
Results:
Data from 57,678 patients (median age 74 years, IQR 64–83) were analyzed. Increased driving time was negatively associated with thrombectomy in a nonlinear fashion. Patients living 120 minutes from a CSC were 20% less likely to receive thrombectomy (adjusted odds ratio [aOR] 0.80, 95% CI 0.62–1.04), and those 240 minutes away were 60% less likely (aOR 0.41, 95% CI 0.28–0.60). Driving time did not affect thrombolysis rates, even at 240 minutes (aOR 1.0, 95% CI 0.70–1.42). Thrombectomy use was similar in medium urban areas (aOR 0.80, 95% CI 0.56–1.16) and small towns (aOR 0.78, 95% CI 0.57–1.06) compared to large urban areas.
Conclusion:
Thrombolysis access is equitable across Ontario, but thrombectomy access decreases with increased driving distance to CSCs. A multifaceted approach, combining healthcare policy innovation and infrastructure development, is necessary for equitable thrombectomy delivery.