Cardiopulmonary function reflects the ability to tolerate surgery and recovery after surgery. It is a routine preoperative test. Here are some 7 ways to judge your cardiopulmonary function at home. A. Stair climbing test If you can ascend to the third floor in one breath at a slow pace and do not feel obvious shortness of breath and chest tightness, your heart has good cardiopulmonary function. Second, the blood pressure check diastolic blood pressure and systolic blood pressure ratio is normal for about 50%, if lower than 25%, or higher than 75%, it means that the cardiorespiratory function is poor. Third, blood pressure and pulse rate calculation systolic blood pressure plus the sum of diastolic blood pressure, and then multiplied by the number of pulses per minute, if the product is within 13,000-20,000, then the cardiopulmonary function is good. Fourth, blood pressure, pulse rate and activity test normal blood pressure and pulse rate when sleeping, sit up faster in 30-40 seconds, if the drop is less than 1.4 kPa, the pulse rate is accelerated 10-20 times per minute, indicating good cardiopulmonary function. On the contrary, the blood pressure drops more than 1.4 kPa, pulse accelerates more than 20 times per minute, and even nausea, vomiting, dizziness, cold sweat and other phenomena, indicating that the heart and lung function is very poor. Fifth, the gas test distance of about a foot lit a match, vigorously breathe, can extinguish the flame is good cardiorespiratory function. Sixth, a small amount of exercise test running in place for a while, the pulse rate increases to 100-120 times per minute, stop the activity, if the pulse rate returns to normal in 5-6 minutes, the heart and lung function is normal. Seven, breath-holding test deep inhalation after holding the breath, can hold the breath for 30 seconds to show good cardiorespiratory function, can hold the breath for more than 20 seconds is also good.