ObjectiveTo explore the effect of closed-loop group nursing model on the makeshift intensive care unit (ICU) in a hospital specialized for coronavirus disease 2019 (COVID-19).MethodsSeveral fever wards had been shifted into ICUs and ran by the first medical team from Sichuan Province from January 30th to March 19th, 2020. Closed-loop group nursing model was utilized. The nursing model activated the nurses in management by empowerment and nursing group establishment. To ensure standard of care, measures were carried out in this model, namely, improving the physical work environment, nurse training, optimizing composition of nursing manpower, fine and standardized management of medical resources, “double-chain” medical supply system, “3S” management on first aid kit, protecting patient safety and dignity, and developing emergency nursing workforce deployment plan.ResultsThe implementation of closed-loop group nursing model showed good results in treating severe to critically ill COVID-19 patients regardless of shortages in nursing workforce and facilities. The rescue work was carried out successfully in the makeshift ICUs. All the nurses showed great teamwork and were really involved in the management of the wards. ConclusionsAs the current ICUs were not adequate for the increasing number of critically ill patients during the epidemic, it was unavoidable to transform other wards into ICUs. Closed-loop group nursing model was utilized to break the hierarchy. As a result, all nurses were empowered to participate in nursing management and their potential was fully inspired. Furthermore, this working model presented a clear working framework in multidisciplinary teamwork in a limited time, which also provided patients with dignity and safety.
Objective To establish a safe, effective, and economic feeder-free culture system which is suitable for the culture of human parthenogenetic embryonic stem cells (hPESCs) in vitro. Methods hPESCs were cultured with mTeSRTMl medium (control group) and human foreskin fibroblasts-conditional medium (hFFs-CM) (experimental group). The growth status of hPESCs in both feeder-free culture systems were observed with inverted microscope. Alkaline phosphatase (ALP) analysis and karyotype analysis were used to study the biological characteristics of hPESCs. The expression of hPESCs pluripotent marker Oct-4 was analyzed by RT-PCR. Differentiation experiment in vivo and in vitro was applied to observe the differentiation potential of hPESCs into three germ layers. Results hPESCs had regular morphology with difficulty in differentiation in both culture systems. No obvious difference was observed in morphology and expansion speed of hPESCs between 2 groups. After subcultured for 15 passages in vitro, hPESCs in 2 groups could maintain normal female diploid karyotype 46, XX and pluripotency. The expression of Oct-4 mRNA was positive in 2 groups. hPESCs in 2 groups could form embryonic body in differentiation experiment in vitro and could develop into teratomas containing three germ layers in nude mice. Conclusion Feeder-free culture system of hFFs-CM can sustain the growth of hPESCs and keep hPESCs undifferentiated state for long. A feeder-free culture system of hPESCs is successfully established, which can support the growth of hPESCs, reduce the contamination from animals, decrease the cost of culture, and satisfy the clinical large-scale application.