0 1 Patients who have just finished surgery and need emergency observation or whose condition is relatively critical and unstable will enter the ICU, so entering the ICU means that the patient has arrived in do or die.

02 ICU patients will be divided into three levels according to the severity of their illness, the first level monitoring is intensive care patients, the second level monitoring is patients who are sick and may be fatal after surgery, and the third level monitoring is patients whose condition tends to be stable. Three-level differentiation can also be used as a differentiation of disease severity.

Patients who need to enter the intensive care unit generally have serious heart failure, renal failure, myocardial infarction, brain stem infarction or bleeding, sepsis, respiratory failure and other life-threatening patients.

In principle, ICU patients are not allowed to be accompanied by their families, but relatives are allowed to visit. Visiting hours should generally be arranged after a nap, and each visit should not exceed 2 hours.