Exploring the Development of a Canadian Frostbite Care Network and the Future of Frostbite Care in Canada Using a Qualitative Approach.

INTRODUCTION: The Canadian Frostbite Collaborative project is exploring frostbite patient care needs and current practices in Canada to inform the development of a Canadian frostbite care network (CFCN) as a national quality improvement initiative. METHODS: Using a quantitative and qualitative approach, this study aimed to define the landscape of current frostbite practices, challenges, and interest in future work. RESULTS: Current frostbite care practices were initially assessed through semistructured phone interviews of Canadian healthcare providers. Canadian healthcare providers managing frostbite in a range of health disciplines and contexts then participated in focus group sessions discussing the potential roles and opportunities as well as potential challenges in developing a CFCN. Roles and opportunities for a network in advancing frostbite care included facilitating research, educating stakeholders, facilitating collaboration, standardizing care, and advocating for frostbite care. Challenges identified in frostbite care and network development included managing resources, navigating the Canadian healthcare system, overcoming low numbers, and communicating with policymakers and frontline providers. CONCLUSIONS: Formalizing a CFCN may provide important opportunities and support in overcoming critical barriers to providing high-quality frostbite care across Canada.

3D-Printed Personal Protective Face Shields During the COVID-19 Pandemic: A Survey of Canadian Frontline Workers.

Background During the coronavirus disease 2019 pandemic, three-dimensional (3D) printing was utilized to rapidly produce face shields for frontline workers in response to an acute shortage of personal protective equipment (PPE). In this study, we examine the perceived utility and performance of 3D-printed (3DP) face shields through a survey of frontline workers in Ontario, Canada. Methodology Frontline workers who received community-produced 3DP face shields from the Canadian initiative "3DPPE GTHA" (March-December 2020) were invited to participate in the study. The survey response rate was 54.3%. Of 63 respondents, 39 were patient-facing and 24 were community-facing frontline workers. Participants were asked to rate performance measures in 10 categories on a five-point Likert scale. Data were categorized by organization and frontline worker type, and a t-test was used to determine statistically significant differences among subgroups. Results The mean preference for 3DP face shields among respondents was 3.2 out of 5 (95% confidence interval [CI]: 2.1-4.3). Community-facing respondents reported significantly greater overall utility scores for 3DP face shields (3.58, 95% CI: 3.38-3.79) compared to respondents working in a patient-facing profession (2.95, 95% CI: 2.77-3.13; p < 0.05). However, no differences were reported in portability and compatibility with other PPE. Respondents from organizations with large service volumes reported significantly lower overall utility scores (2.67, 95% CI: 2.44-2.89) than respondents in organizations with smaller service volumes (3.45, 95% CI: 3.28-3.62; p < 0.05). Conclusions Community-facing frontline workers and those from smaller service volume organizations endorse higher utility for 3DP face shields than patient-facing frontline workers. Despite this, frontline workers generally rate 3DP face shields positively. 3DP face shields are a viable option for personal and community use and can be used to supplement supply in a community setting.

Cold agglutinin disease and COVID-19 requiring therapeutic plasma exchange.

A 70-year-old man with known cold autoimmune haemolytic anaemia was referred to the emergency department with increased shortness of breath on exertion. He had been confirmed positive for non-variant COVID-19 infection 1 week earlier based on nasopharyngeal swab PCR assay. CT thorax demonstrated diffuse patchy bilateral ground glass opacities, consistent with COVID-19 pneumonia. Bloodwork demonstrated severe cold agglutinin mediated haemolytic anaemia. To help stabilise the patient, he was transferred to a tertiary care hospital for urgent therapeutic plasma exchange. Key supportive therapy included folic acid supplementation, ensuring the patient was kept warm and warmed infusions including transfusions via the apheresis machine. The patient made a good recovery following plasma exchange, and his haemoglobin levels remained stable by discharge.

Optimization of community-led 3D printing for the production of protective face shields.

BACKGROUND: As the healthcare system faced an acute shortage of personal protective equipment (PPE) during the COVID-19 pandemic, the use of 3D printing technologies became an innovative method of increasing production capacity to meet this acute need. Due to the emergence of a large number of 3D printed face shield designs and community-led PPE printing initiatives, this case study examines the methods and design best optimized for community printers who may not have the resources or experience to conduct such a thorough analysis. CASE PRESENTATION: We present the optimization of the production of 3D printed face shields by community 3D printers, as part of an initiative aimed at producing PPE for healthcare workers. The face shield frames were manufactured using the 3DVerkstan design and were coupled with an acetate sheet to assemble a complete face shield. Rigorous quality assurance and decontamination protocols ensured community-printed PPE was satisfactory for healthcare use. CONCLUSION: Additive manufacturing is a promising method of producing adequate face shields for frontline health workers because of its versatility and quick up-start time. The optimization of stacking and sanitization protocols allowed 3D printing to feasibly supplement formal public health responses in the face of a global pandemic.

Poll Everywhere to Encourage Learner Satisfaction and Participation in Internal Medicine Fellowship Didactics.

Active learning improves self-reported engagement and satisfaction in medical education. Audience response systems are one mechanism of encouraging participation, especially in a setting in which learners in varying educational levels are present. Three fellowships participated in this educational quality improvement project where Poll Everywhere® was incorporated into didactics. Attendees were invited to complete a 4-question retrospective pre-post satisfaction survey. Incorporation of the Poll Everywhere® audience response system resulted in a shift in more favorable satisfaction scores and self-perceived attentiveness compared to the pre-intervention responses.

Differential Mechanisms of Septic Human Pulmonary Microvascular Endothelial Cell Barrier Dysfunction Depending on the Presence of Neutrophils.

Sepsis is characterized by injury of pulmonary microvascular endothelial cells (PMVEC) leading to barrier dysfunction. Multiple mechanisms promote septic PMVEC barrier dysfunction, including interaction with circulating leukocytes and PMVEC apoptotic death. Our previous work demonstrated a strong correlation between septic neutrophil (PMN)-dependent PMVEC apoptosis and pulmonary microvascular albumin leak in septic mice in vivo; however, this remains uncertain in human PMVEC. Thus, we hypothesize that human PMVEC apoptosis is required for loss of PMVEC barrier function under septic conditions in vitro. To assess this hypothesis, human PMVECs cultured alone or in coculture with PMN were stimulated with PBS or cytomix (equimolar interferon γ, tumor necrosis factor α, and interleukin 1ß) in the absence or presence of a pan-caspase inhibitor, Q-VD, or specific caspase inhibitors. PMVEC barrier function was assessed by transendothelial electrical resistance (TEER), as well as fluoroisothiocyanate-labeled dextran and Evans blue-labeled albumin flux across PMVEC monolayers. PMVEC apoptosis was identified by (1) loss of cell membrane polarity (Annexin V), (2) caspase activation (FLICA), and (3) DNA fragmentation [terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL)]. Septic stimulation of human PMVECs cultured alone resulted in loss of barrier function (decreased TEER and increased macromolecular flux) associated with increased apoptosis (increased Annexin V, FLICA, and TUNEL staining). In addition, treatment of septic PMVEC cultured alone with Q-VD decreased PMVEC apoptosis and prevented septic PMVEC barrier dysfunction. In septic PMN-PMVEC cocultures, there was greater trans-PMVEC macromolecular flux (both dextran and albumin) vs. PMVEC cultured alone. PMN presence also augmented septic PMVEC caspase activation (FLICA staining) vs. PMVEC cultured alone but did not affect septic PMVEC apoptosis. Importantly, pan-caspase inhibition (Q-VD treatment) completely attenuated septic PMN-dependent PMVEC barrier dysfunction. Moreover, inhibition of caspase 3, 8, or 9 in PMN-PMVEC cocultures also reduced septic PMVEC barrier dysfunction whereas inhibition of caspase 1 had no effect. Our data demonstrate that human PMVEC barrier dysfunction under septic conditions in vitro (cytomix stimulation) is clearly caspase-dependent, but the mechanism differs depending on the presence of PMN. In isolated PMVEC, apoptosis contributes to septic barrier dysfunction, whereas PMN presence enhances caspase-dependent septic PMVEC barrier dysfunction independently of PMVEC apoptosis.

Development of an anti-HIV vaccine eliciting broadly neutralizing antibodies.

The extreme HIV diversity posts a great challenge on development of an effective anti-HIV vaccine. To solve this problem, it is crucial to discover an appropriate immunogens and strategies that are able to prevent the transmission of the diverse viruses that are circulating in the world. Even though there have been a number of broadly neutralizing anti-HIV antibodies (bNAbs) been discovered in recent years, induction of such antibodies to date has only been observed in HIV-1 infection. Here, in this mini review, we review the progress in development of HIV vaccine in eliciting broad immune response, especially production of bNAbs, discuss possible strategies, such as polyvalent sequential vaccination, that facilitates B cell maturation leading to bNAb response.

Fractal topology of gene promoter networks at phase transitions.

Much is known regarding the structure and logic of genetic regulatory networks. Less understood is the contextual organization of promoter signals used during transcription initiation, the most pivotal stage during gene expression. Here we show that promoter networks organize spontaneously at a dimension between the 1-dimension of the DNA and 3-dimension of the cell. Network methods were used to visualize the global structure of E. coli sigma (sigma) recognition footprints using published promoter sequences (RegulonDB). Footprints were rendered as networks with weighted edges representing bp-sharing between promoters (nodes). Serial thresholding revealed phase transitions at positions predicted by percolation theory, and nuclei denoting short steps through promoter space with geometrically constrained linkages. The network nuclei are fractals, a power-law organization not yet described for promoters. Genome-wide promoter abundance also scaled as a power-law. We propose a general model for the development of a fractal nucleus in a transcriptional grammar.

Morbidity pattern and utilization of a primary health care center in a low socioeconomic area of Karachi.

OBJECTIVE: To identify the morbidity pattern according to age, gender and seasonal variation using the ICD coding and the utilization of Primary Health Care (PHC) center services in a demographically defined community. METHODS: The data collected from 2001-2003 was analyzed using the International Classification of Diseases-10 (ICD-10) coding for identifying the morbidity patterns presenting at the PHC Center. The age and gender distribution of the patients and the seasonal variation of few diseases were noted. Only the residents of the area visiting the center for preventive or curative services were included. A structured performa was designed to enter the age, gender, disease and ICD codes. The faculty was trained for using the coding system. RESULTS: A total of 13,519 patients visited the PHC during three-year period. On an average, 376 patients were seen during a month with male to female ratio of 1:2. The most common diseases presented belong to the respiratory system, followed by infections or parasitic infestations and diseases of the reproductive system. The women presented for first visit of antenatal check up were 960 out of 4614 women of reproductive age group. Among the adult population, 391 (6%) presented with hypertension, 64 (1%) were Type 2 diabetics and 86 (1.3%) were asthmatics. The paediatric population analysis showed that 918 (13%) had upper respiratory infections and 1339 (19%) had diarrhoea. CONCLUSION: Problem oriented medical records from health centers, computerized in a uniform standardized way, can give extensive information about the content and burden of health problems in family practice and presumably public health.

Knowledge of students regarding hepatitis and HIV/AIDS of a private medical university in Karachi.

OBJECTIVE: To determine and assess the level of awareness among students of a private medical college regarding HIV/AIDS, Hepatitis B and C. METHODS: A survey was conducted to assess the awareness of medical students on HIV/AIDS, hepatitis B and C. They were asked to fulfill a pre-tested structured questionnaire. The variables accessed were their knowledge of disease regarding etiology, mode of transmission, and prevention. RESULTS: A total of 267 students participated, with 117 (43.8%) students from pre-clinical years and 150 (56.2%) from the clinical years. The male female ratio was 1:2, mean age of respondents was 21 +/- 1.5 years. Majority of the students (98%) agreed that an infected person is a major source of transmitting these infections. Almost all (95%) students knew that blood transfusion was an important source of transmitting these infections. Wearing gloves (87%) and safe disposal of sharps waste (98%) were known by the students to be the ways to protect against these infections. A significant difference was noted on comparing the knowledge between preclinical and clinical students regarding medical / surgical procedures causing these infections (p<0.001) and also regarding the ways to protect against these diseases (p=0.001). CONCLUSION: There is a lack of awareness among the medical students entering into the profession. It is the need of the hour to emphasize on practicing universal precautions. In addition, some preventive measures should be taken by the management of the universities and medical students to avoid the occurrence of these problems.

Improving vaccination status of children under five through health education.

OBJECTIVE: To improve awareness and knowledge of mothers regarding vaccine preventable diseases and the immunization status of children under five through health education messages by medical students, at Gulshane-Sikanderabad, a squatter settlement adjacent to Ziauddin Medical University, Karachi. METHODS: The undergraduate medical students' visit families in the squatter settlement. This study compared the effect of intervention by medical students on vaccination status of children under five in the intervention households versus those without intervention. A baseline study was done in 1998 and a follow-up study was done after four years to assess the differences in knowledge and practices of mothers regarding immunization. RESULTS: A total of 110 houses from block I and 207 houses from block V were selected. An increase of 22% (52% vs 30%) in block-I (p = 0.003) and 19% (32% vs 13%) increase in block V was seen in the utilization of PHC Center for vaccination (p = 0.001). Mothers' knowledge regarding the age when first vaccine is administered to the child, increased in the follow-up from 60% to 76.5% (p < 0.01) in block I and from 50% to 62% in block V. The immunization status increased significantly in block I from 46.5% to 75% after the intervention (p < 0.005), no significant difference could be seen in block V (p = 0.16). In the follow-up survey a significant difference was seen in the vaccination status between the two blocks (p = 0.001). CONCLUSION: The health education messages significantly increased the vaccination status of children under 5 in the intervention area.