The content of preventive nursing activities in Newman medical care system model.

Answer: ① Primary preventive health care. When the system adapted to the nursing object does not respond to the pressure source, the nursing staff mainly implements nursing by controlling or changing the pressure source. For example, it can reduce the invasion possibility and intensity of stressors, and also strengthen the function of strain defense, such as educating patients on diet, sleep and decompression. The purpose of primary prevention is to maintain the stability of people as a system and promote and protect people's health. ② Secondary prevention and health care. It is suitable for people whose dynamic balance is destroyed and when the stressor appears symptoms or signs after crossing the normal defense line. The key point of nursing is to help patients find and treat early. The purpose of secondary prevention is to obtain the stability of people as a system. ③ Three-level preventive health care. The normal structure and energy source suitable for human body are destroyed. The key point of nursing is to help the nursing objects recover and rebuild their functions, and to prevent further damage from stressors. The purpose of tertiary prevention is to maintain the stability of people as a system.