Hematopoietic Stem/Progenitor Cells and Engineering: HEMATOPOIETIC STEM/PROGENITOR CELLS (HPC-A) CRYOPRESERVATION PROCESS VALIDATION USING CRYOSTOR CS10 FREEZE MEDIA

Background & Aim: During the COVID-19 pandemic, we performed HPC-A cryopreservation process validation using the CryoStor CS10 freeze media to replace the current 10% DMSO cryoprotectant (Control), which encountered severe backorder. Methods, Results & Conclusion(s): This process validation included phase I, phase II, and follow-up studies. Ten HPC-A collection cell product samples were cryopreserved in the phase I study using CS10 and Control (1:1) post-plasma depletion. Post-thaw viability tests using the 7-AAD method were performed on the cryopreserved samples for parallel comparison. In phase II, each of three patient HPC-A cell products was split evenly into CS10 and Control cryopreservation. The CS10 cryopreserved HPC-A cell products only were used for infusion. The recipients' engraftment outcomes of white blood cells (WBC), granulocytes (ANC), and platelets (Plts) were monitored. Post-thaw viability test was performed on the quality control samples from both groups. In the follow-up study, engraftment outcomes of WBC, ANC, and Plts were evaluated from ten recipients who received the CS10 cryopreserved HPC-A. In the phase I study, the post-thaw viability of the CS10 group was significantly higher than the Control group (p=0.002). All post-thaw viability results were above 60%, the current lab release criteria. In the phase II study, all cryopreserved cell products met cell product release criteria (> 60%). All engraftment results were within our center-established ranges except for the Pt b's platelet engraftment. Three recipients had not had any cell product infusion-related adverse events post infusion. Both CD34 and CD45 post-thaw viability results in the CS10 group were remarkably higher than the Control group, except for the patient c's CD34 viability. In the follow-up study, the total infused cell product volume ranged from 60 ml to 118 ml, and the WBC concentration in the cryopreserved cell products ranged from 134 to 440 (x10

Application of ultrasound-guided peripheral arterial puncture in severe patients with Coronavirus disease 2019 under three-level protection

Objective To explore the application of ultrasound-guided arterial line placement in severe patients with COVID-19. Methods From February to April 2020, we retrospectively collected and analyzed the clinical data of critical patients with COVID-19 with an indwelling peripheral arterial catheter treated by the medical team of Peking Union Medical College Hospital. Patients with ultrasound-guided peripheral arterial catheterization were taken as the study group, while patients whose arterial catheter was placed by traditional palpation were taken as the control group. The puncture condition and complication rate were compared between the two groups. Results A total of 60 severe patients with COVID-19 who met the inclusion and exclusion criteria were enrolled in this study. There were 30 cases in the study group and 30 cases in the control group. In the study group, the success rate of the first catheterization of the peripheral artery (63.3% vs. 26.7%) and the total puncture success rate [(79.43+/- 25.79)% vs. (53.07+/-30.21)%] were higher than those in the control group (all P < 0.05), the puncture times(1.43+/-0.56 vs. 2.50+/-1.28) were less than those of the control group (P < 0.05). The rates of 24-hour disuse (6.7% vs. 30.0%), local hematoma (10.0% vs. 36.7%), occlusion, and tortuous (3.3% vs. 40.0%) in the study group were lower than those in the control group (all P < 0.05). Conclusion Under the three-level protection, ultrasound-guided arterial catheter placement for severe patients with COVID-19 can improve the success rate of catheter placement, reduce puncture times, and reduce the incidence of complications.Copyright © 2021, Peking Union Medical College Hospital. All rights reserved.

A functionalized microwave sensor in a microfluidic platform for rapid detection of SARS-CoV-2

The global COVID-19 pandemic caused by the SARS-CoV-2 has claimed >3.5 million lives and resulted in detrimental social-economic impact. If reliable and rapid test systems were available at home or community level such as drive-by stations, the scope and impact of this tragedy could be largely reduced. Although the vaccine roll out has helped control the pandemic, it is important to develop rapid and accurate testing methods for detection of the SARS-CoV-2 which can be tuned to respond to its variants or similar corona viruses in response to potential outbreaks. In this work, we present a novel method for detection of the SARS-CoV-2 virus based on an antibody functionalized microwave sensor integrated with a microfluidic platform. © 2021 MicroTAS 2021 - 25th International Conference on Miniaturized Systems for Chemistry and Life Sciences. All rights reserved.

Gestational Diabetes during the Pandemic: Screening Methods and Outcomes in First-time GDM

Objective: To study the impact of national recommendations on the method of screening used for GDM during the COVID-19 pandemic, and evaluate differences in maternal and fetal outcomes among women with first-time GDM (ftGDM). Design: A retrospective observational study in a single Tertiary London Hospital. During the pandemic, the RCOG recommended an amended GDM screening protocol to reduce hospital attendance and risk of virus transmission (fasting blood glucose level ≥5.3 and/or HbA1c ≥39 at 28 weeks of gestation). Our Trust did not adopt this due to concerns regarding its sensitivity. We adopt a 2-step approach to universal GDM screening using a 50g glucose challenge test, and refer those screening positive for a full oral glucose tolerance test. Method: Outcomes were reviewed for women with ftGDM delivering a singleton at ≥24 weeks gestation between 01/04/20 -28/ 5/21. Our primary aim was to determine the impact of the change in COVID-19 GDM screening policy, had it been implemented. Our secondary outcomes included GDM management method, maternal and perinatal complications. We excluded women with a booking HbA1c ≥42 (indicative of pre-diabetes) and those who had bariatric surgery. Demographic and outcome data were obtained from electronic databases. Results: 247 women were diagnosed with ftGDM using local screening methods. Only 23 of these women had a HbA1c ≥39 at time of diagnosis and a further 12 had FBG ≥5.3. There was no significant difference in age or ethnicity between the two groups. The locally diagnosed group had a statistically significantly lower booking BMI (P<0.001) and were less likely to require pharmacological management of GDM (P<0.001). There were no significant differences in rates of induction of labour, gestation at delivery, birth weight or any perinatal adverse outcome. However, the women in the Covid-19 GDM screening group were significantly more likely to be delivered by Emergency Caesarean Section (p = 0.03) and have gestational hypertensive disease (p = 0.025). Conclusions: If we had implemented RCOG HbA1c screening, we would have not diagnosed 207 women with GDM, 41% of whom required pharmacological treatment. It is not surprising that women with higher HbA1c values had higher rates of maternal complications, due to the well-established association between maternal hyperglycaemia and adverse obstetric outcomes. As such, it is imperative that more sensitive screening protocols such as the 50g screen are considered in any future pandemics, such that women with GDM can be identified and maternal hyperglycaemia treated to benefit in-utero fetal programming.

Machine learning method to solve the credit decision-making problem of small and medium-sized enterprises

Small and medium-sized enterprises(SMEs) play important roles in our economy. However, the scale of SMEs is relatively small. There is also a lack of pledged assets, which results in a problem of difficulty in borrowing funds. Banks face the problem that how can they determine whether to lend or not when evaluating SMEs credit risk factors, including the strength and reputation, as well as credit strategies, such as loan quota, interest rate and term. In this paper, support vector machine and decision tree method are comprehensively used to learn the enterprises data and evaluate the credit rating of enterprises lacking credit information. A linear optimization model is established based on the bank's principle of maximizing the expected annual profit, and this paper provides the optimal strategy for banks to decide the amount of loans granted to each enterprise. In addition, emergency situation is taken as an example, such as Covid-19 epidemic, by utilizing machine learning method and optimization theory, based on the fact that banks expect to maximize profit, establish an optimization model with wider applicability. And this paper provides credit strategy for banks when facing unexpected environmental emergency. © 2021 SPIE.

Application of ultrasound-guided peripheral arterial puncture in severe patients with Coronavirus disease 2019 under three-level protection

Objective To explore the application of ultrasound-guided arterial line placement in severe patients with COVID-19. Methods From February to April 2020, we retrospectively collected and analyzed the clinical data of critical patients with COVID-19 with an indwelling peripheral arterial catheter treated by the medical team of Peking Union Medical College Hospital. Patients with ultrasound-guided peripheral arterial catheterization were taken as the study group, while patients whose arterial catheter was placed by traditional palpation were taken as the control group. The puncture condition and complication rate were compared between the two groups. Results A total of 60 severe patients with COVID-19 who met the inclusion and exclusion criteria were enrolled in this study. There were 30 cases in the study group and 30 cases in the control group. In the study group, the success rate of the first catheterization of the peripheral artery (63.3% vs. 26.7%) and the total puncture success rate [(79.43± 25.79)% vs. (53.07±30.21)%] were higher than those in the control group (all P < 0.05), the puncture times(1.43±0.56 vs. 2.50±1.28) were less than those of the control group (P < 0.05). The rates of 24-hour disuse (6.7% vs. 30.0%), local hematoma (10.0% vs. 36.7%), occlusion, and tortuous (3.3% vs. 40.0%) in the study group were lower than those in the control group (all P < 0.05). Conclusion Under the three-level protection, ultrasound-guided arterial catheter placement for severe patients with COVID-19 can improve the success rate of catheter placement, reduce puncture times, and reduce the incidence of complications. © 2021, Peking Union Medical College Hospital. All rights reserved.

FEASIBILITY, DELIVERY, AND IMPLEMENTATION OF A REMOTE CRITICAL CARE TRAINING PROGRAM IN CHINA: THE CERTAIN APPROACH

TOPIC: Education, Research, and Quality Improvement TYPE: Original Investigations PURPOSE: To describe the development, implementation, and learner engagement in a longitudinal international remote critical care continuing medical education program in China. METHODS: Based on the Mayo Clinic Checklist for Early Recognition and Treatment of Acute and Illness and iNjury (CERTAIN) program, we designed and delivered a longitudinal 40-week remote coaching program for a community-based teaching hospital in Shandong Province, China. Based on a mixed-methods needs assessment that included learner feedback using an exploratory sequential design and ICU process and outcomes data, we developed a curriculum that included asynchronous, online learning modules with multiple language captions and weekly remote education sessions using a blend of didactic presentations on common critical care syndromes, virtual simulation, journal club, and case-based discussions. Faculty included a diverse group of critical care experts and bilingual facilitators. The program also included clinical research and quality improvement workshops to facilitate implementation of key concepts identified during these activities. Participants completed a survey using a 5 point anchored Likert scale after each educational activity to provide feedback and guide course improvement. RESULTS: Twenty-two Chinese clinicians (18 physicians, 4 nurses) enrolled in this CERTAIN longitudinal program. Learners completed a total of 163 hours (mean 7.4 hr/learner) asynchronous online learning, and to date have completed 23 weekly education sessions (total 28 hours, including an extended virtual simulation experience). Survey response rate was 56%. Learners reported a high rate of overall satisfaction with the course (112, 61% Excellent;55 (30%) Very Good) and specific topic discussions (110,60% Excellent;57, 31% Very Good), with steady improvement over time. Perceived practice relevance was also high (110, 59% Excellent;55,30% Very Good), and this effort has informed ongoing local performance improvement initiatives. CONCLUSIONS: Remote delivery of longitudinal critical care continuing education program in China using asynchronous learning, case-based discussion, and virtual simulation is feasible, associated with a high rate of learner satisfaction, and increases engagement in quality improvement initiatives. This innovative global education initiative offers an important potential solution to strengthen critical care services in remote, resource-limited settings at low cost, especially during the ongoing COVID-19 pandemic. CLINICAL IMPLICATIONS: The World Health Organization has identified remote education programs as a priority to strengthen international critical care services and better meet growing global clinical demand. The best method to effectively deliver continuing medical education to international healthcare providers with unique cultural, organizational, and practice backgrounds is not well defined. DISCLOSURES: no disclosure on file for Wenjuan Cui;No relevant relationships by Yue Dong, source=Web Response Patent/IP rights for a licensed product relationship with Ambient Clinical Analytics Please note: From 2016 Added 05/23/2021 by Ognjen Gajic, source=Web Response, value=Royalty No relevant relationships by Heyi Li, source=Web Response No relevant relationships by Alexander Niven, source=Web Response no disclosure on file for Lujun Qiao;No relevant relationships by Yuqiang Sun, source=Web Response no disclosure on file for Qingzhong Yuan;

An implementation and longitudinal evaluation framework of remote quality improvement initiatives

Objective: Virtual learning experiences have become widely used during the ongoing COVID-19 global crisis. Given its cost-effectiveness, accessibility, and flexibility, remote training experiences are likely to assume a permanent and expanded role in medical education and quality improvement initiatives. However, little is known about how best to measure the effectiveness of remote training interventions. The Checklist for Early Recognition and Treatment of Acute Illness and Injury (CERTAIN) is an established critical care quality improvement program with evidence of improved care processes and patient outcomes in an international quality improvement trial. Our aim was to develop a structured implementation and longitudinal evaluation framework that measures the complex contributors to the impact of this remote training program, including incorporation into processes of care and sustainment over time. Methods: We convened an international topic review group that included individuals with diversity in clinical expertise, nationality, and experience in medical education, quality improvement, implementation science, and research methodology. We recruited individuals with experience designing and participating in various medical remote training programs, including teleconferences, tele-consults, online video/chat platforms, and virtual simulation classrooms. Through a series of facilitated discussions, we directed the group to develop a conceptual framework to guide the development of remote learning programs and accompanying evaluation tools to measure their impact. Results: The review group members included education experts and continuing medical education participants from China and the United States with practice backgrounds in Critical Care, Internal Medicine, Anesthesiology and Emergency Medicine. The group developed a conceptual framework based on the CIPP (context-input-process-product) quality evaluation model. The framework includes three phases: before, during, and after the remote training. The proposed quantitative and qualitative evaluation tools blend the Proctor taxonomy, an expansion of the popular RE-AIM framework used to categorize implementation outcomes, to include early (i.e. acceptability, appropriateness, feasibility), mid (i.e. adoptions, fidelity), and late (i.e. sustainability) stage outcomes to provide a more complete understanding of the implementation process and facilitate generalization of our findings. Elements of the Logic Model were also used to guide the program development process. Conclusions: We propose a dynamic, longitudinal implementation evaluation framework that has sufficient rigor and flexibility to meet the needs of the existing and emerging remote medical training programs in global practice settings. The outcomes from these mixed-methods analyses will provide a robust toolbox to guide the design, delivery, implementation, and sustainment of remote medical educational programs.

Returning to the Office during the COVID-19 Pandemic Recovery: Early Indicators from China

The COVID-19 pandemic forced many people to abruptly shift to remote work in early 2020. But as countries progressed through a recovery from the pandemic, as occurred in China beginning in the spring of 2020, companies went through a process of reopening their offices. People worked in a hybrid mode in which they could decide how to divide their time working from home and in the office. In this research, we explored what are the key factors that shaped employees' decisions. We conducted a survey and interviews with employees in China of a global technology company. The data demonstrated people's work time arrangements between home and office, their experiences when working from home, and their preferred work mode. Through the interviews, we identified people's diverse strategies and reasons behind the decisions of where to work during the hybrid work phase. © 2021 ACM.

Epidemiological and clinical findings of discharge patients infected with the 2019 novel coronavirus (SARS-COV-2) in Changchun, Northeast China: A retrospective cohort study

Introduction: Few previous studies have been well described the details of the clinical and virological course of illness among discharged patients. The study aims to study the epidemiological and clinical features of discharged patients with SARS-CoV-2 infection in Changchun, Northeast China. Materials and methods: We included all discharged patients with SARS-CoV-2 infection from Changchun Infectious Hospital, China, as 9 March 2020. We extracted and collected on data of demographic characteristic, clinical features, chest computed tomography (CT) scan, laboratory result, and treatment from the electronic medical records. Exact epidemiological information was obtained from the investigation of patients or close contacts by investigators of at all levels of the Center for Disease Prevention and Control in Jilin Province. Results: Of the 43 discharged patient retrospective studied, 38 were mild novel coronavirus pneumonia, only one with critical ill case and no health workers were infected. The median age was 41.0 years, and 25 were male. All cases were infected by person-to-person transmission and the median incubation period from exposure to illness onset was 8.0 days. 22 patients had comorbidities. The most common symptoms at illness onset were fever, cough, expectoration, myalgia or fatigue, chest tightness, nasal congestion or sneezing. Median duration of illness onset to hospital admission and discharged was 6.0 days and 22.0 days, the median duration of viral shedding after illness onset was 19.0 days (IQR: 14-22). Conclusion: Patients were imported and cluster cases by person-to-person transmission and relatively mild in Changchun, China. Our findings further confirmed the prolonged viral shedding among patients. © 2021 A. CARBONE Editore. All rights reserved.

Sex differences in patients with covid-19: A retrospective cohort study and meta-analysis

BACKGROUND: Accumulated evidence revealed that male was much more likely to higher severity and fatality by SARS-CoV-2 infection than female patients, but few studies and meta-analyses have evaluated the sex differences of the infection and progression of COVID-19 patients. AIM: We aimed to compare the sex differences of the epidemiological and clinical characteristics in COVID-19 patients;and to perform a meta-analysis evaluating the severe rate, fatality rate, and the sex differences of the infection and disease progression in COVID-19 patients. METHODS: We analyzed clinical data of patients in Changchun Infectious Hospital and Center, Changchun, Northeast China;and searched PubMed, Embase, Web of Science, and Cochrane Library without any language restrictions for published articles that reported the data of sex-disaggregated, number of severe, and death patients on the confirmed diagnosis of adult COVID-19 patients. RESULTS: The pooled severe rate and fatality rate of COVID-19 were 22.7% and 10.7%. Male incidence in the retrospective study was 58.1%, and the pooled incidence in male was 54.7%. CONCLUSION: The pooled severe rate in male and female of COVID-19 was 28.2% and 18.8%, the risky of severe and death was about 1.6folds higher in male compared with female, especially for older patients (> 50 y). © 2020 Zhijun Li, Lina Feng, Wenyu Cui, Jian Zhang, Yingxin Huang, Yunhong Zhao, Fei Teng, Donglin Wu, Bonan Cao, Hui Wang, Liquan Deng, Qiong Yu.

Real-world outcomes in thoracic cancer patients (pts) with severe acute respiratory syndrome coronavirus 2 (COVID-19): Single UK institution experience

Background: Globally, United Kingdom (UK) has the second highest mortality rate from COVID-19. Risk factors include cancer and lung disease;thus thoracic cancer pts are especially vulnerable. Methods: Thoracic cancer pts diagnosed with COVID-19 (PCR, radiological or clinical) at a UK academic centre between March-May 2020 were included. Data were extracted from pts records. Demographics, treatment and outcomes are described. Results: 27 pts were included, 12 (44%) diagnosed by PCR, 4 (15%) radiologically and 11 (41%) clinically. 89% had advanced thoracic malignancies. Symptoms included dyspnoea (52%), cough (67%), fever (59%), fatigue (37%), confusion (22%), diarrhoea (11%), anosmia (7%). 14 (52%) patients were hospitalised (median 6d);4 (15%) required intensive care (ICU), of which 3 died. 10 (37%) pts required oxygen, 4 (14%) required non invasive ventilation. No pts were intubated. Complications included pneumonia (26%), sepsis (11%) and ARDS (7%). 2 pts required home oxygen at discharge. 5 (19%) pts died;all were smokers. Median time from symptom onset to death was 10d (range 3-13). Cancer therapy was delayed or ceased in 11 (41%) patients. [Formula presented] Conclusions: Despite UK patient shielding and risk-minimizing therapy modifications, the immediate morbidity from COVID-19 remains high in thoracic cancer pts. Rates of hospitalisation and treatment interruption were high. Although numbers were small, no deaths occurred in never smokers or pts on single modality therapy. Continued follow up is needed to better understand the direct and indirect impacts of COVID-19 on morbidity and subsequent mortality. Legal entity responsible for the study: The authors. Funding: Has not received any funding. Disclosure: A.R. Minchom: Honoraria (self): Loxo Oncology;Honoraria (self): Janssen Pharmaceuticals;Honoraria (self): Faron Pharmaceuticals;Honoraria (self): Bayer Pharmaceuticals;Honoraria (self): Novartis Oncology;Honoraria (self): Merck Pharmaceuticals. M. Ahmed: Advisory/Consultancy, Research grant/Funding (self): BMS;Research grant/Funding (self): MSD;Speaker Bureau/Expert testimony: AstraZeneca. F. McDonald: Speaker Bureau/Expert testimony: Elekta;Advisory/Consultancy, Speaker Bureau/Expert testimony: Astra Zeneca;Advisory/Consultancy: Accuray;Research grant/Funding (institution): MSD. S. Popat: Advisory/Consultancy: BMS;Advisory/Consultancy: Roche;Advisory/Consultancy: Takeda;Advisory/Consultancy: Astra Zeneca;Advisory/Consultancy: Pfizer;Advisory/Consultancy: MSD;Advisory/Consultancy: EMD Serono;Advisory/Consultancy: Guardant Health;Advisory/Consultancy: Abbvie;Advisory/Consultancy: Boehringer Ingelheim;Advisory/Consultancy: OncLive;Advisory/Consultancy: Medscape;Advisory/Consultancy: Incyte;Advisory/Consultancy: Paradox Pharmaceuticals;Advisory/Consultancy: Eli Lilly. All other authors have declared no conflicts of interest.