Everyone is related to "rescue", because everyone will inevitably have some emergencies, even accidents. Even if you are not sick or injured, sometimes you will encounter unexpected anxiety scenes in the natural environment of work and life and on the way to vacation and travel, and you need to lend a helping hand. Therefore, learning some first aid knowledge is really a key and interesting thing.

Learn common first aid knowledge, and master basic first aid skills and simple medical care methods. It is convenient to take reasonable first-aid measures with the kindness of saving lives when an emergency happens. "Saving a life is better than building a seven-level pagoda" may be reflected here.

Basic contents of unarmed cardiopulmonary resuscitation

The most basic purpose of rescue is to save people, and the sudden stop of heart rate and inspiration is a serious life-threatening thing in an instant. Many reasons can cause heart rate and respiratory arrest, but in daily life, death from critical heart disease is more common, and other critical diseases such as electric shock accident, falling into the water and poisoning.

The way to save heart rate and respiratory arrest is hands-free cardiopulmonary resuscitation.

The key practical significance of pupillary reflex

The pupils of both eyes, also called "pupils", are located in the center of the black eyeball. When everything is normal, the pupil of the eye is a big circle (except cataract, glaucoma and keratitis). When you encounter strong light (the flashlight suddenly shines directly on the pupil and you can see the reflection of the pupil), it can quickly become smaller, and then slowly return to its original appearance later.

When the patient suffers from head injury, cerebral hemorrhage or severe drug poisoning, the pupil can be reduced to the size of a needle or expanded to the edge of the black eyeball, which is slow or slow to respond to the light source. Sometimes due to brain edema or brain hernia, the pupils are one big and one small. The change of pupil reminds the serious consequences of brain diseases. During the treatment, doctors often observe the changes of pupils, because they can see whether the condition is getting better or worse.

The pupil of the patient gradually became larger and fixed, and the light reflection subsided, indicating that the patient had fallen into a "clinical death situation".

The average patient's heart stopped for more than 6 minutes, and he was confused about the expectation of rescue.