1. Patient safety.
2. Minimize noise interference.
3. It is not allowed to turn off the alarm function, unless it is temporarily turned off during rescue.
4. The setting of the alarm range is not a normal range, but a safe range.
Setting the alarm value of the safety range refers to setting the upper and lower limits of the alarm according to the patient's clinical conditions, rather than simply setting it according to the normal value of heart rate, respiration, and blood pressure by a certain increase or decrease, so that it is within the safe range.
