機器
blood
cardiac
cardiology
care
closeup
corona virus
coronavirus
covid19
device
diagnosis
digital
display
electronic
equipment
finger
fingertip
hand
health
healthcare
heart
heartbeat
hemoglobin
human heart
level
measure
measurement
medical
medical equipment
medicine
modern
monitor
monitoring
oximeter
oxygen
patient
person
pill
pneumonia
portable
pulse
pulse oximeter
rate
saturation
sensor
technology
tool