A few hours before the terminal stage of gastric cancer, it is mainly manifested in the gradual weakening of patient’s vital signs until failure, focusing on the respiratory system and cardiovascular system. Patients often show symptoms such as rapid acceleration of respiratory rate, above 30 times/min, shallow amplitude, weakening of respiratory air volume, jaw breathing and difficulty in breathing. Patients are extremely debilitated and relatively unresponsive, often in a state of drowsiness, lethargy, or even coma. The heart rate is accelerated and can reach more than 120 times/minute, with irregular heart rhythm, extremely weak pulse, unstable and gradually decreasing blood pressure, and even shock, which cannot be measured. In short, several hours before the terminal stage of gastric cancer, all systems of the body are often in a state of failure, especially the respiratory and cardiovascular systems, which should be paid special attention once they appear, and the patient often appears the end of life and death is very likely.