Cytometry by time-of-flight (CyTOF) is an innovative single-cell analysis technique combining with mass spectrometry principles and flow cytometry. In recent years, CyTOF has been widely used in the study of leukemia treatment for its advantages of multi-parameter, high-throughput, compensation without calculation and diversified data analysis. It can accurately determine intracellular element contents and analyze the changes of unique phenotype and complex signaling pathways of leukemia cells at the single-cell level, to study the mechanism of action of anti-leukemia drugs, discover the potential therapeutic targets of leukemia, assess the therapeutic response and deeply understand the mechanism of leukemia relapse and drug resistance. This article reviews the research progress of CyTOF principle, characteristics, advantages and its application in leukemia treatment.

Objective:To explore the professional care need of the disabled aged post stroke in 5 general hospitals in Shanghai so as to provide a basis for developing the home care service, formulating and implementing the scientific and practicable policy of home care service in Shanghai.Methods:From May 2019 to October 2019, this study selected 301 disabled elderly patients post stroke planning to level hospital and return home in Neurology Department from 5 general hospitals in Shanghai as subjects by convenience sampling. All of patients were investigated with the General Information Scale and the Professional Care Demand Tool for Stroke Survivors Lived in Community. The t-test, one-way ANOVA and multiple linear regression were used to analyze the influencing factors of care needs. Results:The total average score of the professional care need for the disabled aged post stroke was (3.46±0.83) . The top 5 items of care need included the disease recurrence prevention knowledge, getting the care and help from family members, blood pressure monitoring, use methods, attention and adverse reactions of common drugs, explaining disease related knowledge. There were statistical differences in the scores of professional care need among the professional care need of the disabled aged post stroke with different genders, family caregivers, disease types, duration of stroke, other chronic disease and degree of disability ( P<0.05) . The demand of patients who were female, took nursing workers or nannies as caregivers, were with cerebral hemorrhage, stroke duration>1 to 6 months, combined with diabetes and severe disability for professional care need was urgent. Multiple linear regression analysis showed that the influencing factors of professional care need of the disabled aged post stroke were genders (β'=0.117, t=2.327, P=0.021) and degrees of disability (β'=0.496, t=9.706, P<0.001) . Conclusions:The disabled aged post stroke in Shanghai has the high level of the professional care need. Related departments should accelerate the perfection and implementation of home care policy, and provide targeted nursing service based on the most urgent needs.