Male, 12 years old, drop down from 3 meters high. Ass and left ribs touch the ground at first. In addition to the pain of the injured area, he can walk. Hospital physical examination: HR: 84...

Male, 12 years old, drop down from 3 meters high. Ass and left ribs touch the ground at first. In addition to the pain of the injured area, he can walk.

Hospital physical examination:

• HR: 84 beats/min, BP: 108/80mmHg,


• Chest X-ray: normal

Question:

1. Which shock does this patient have? What is your diagnosis basis?


2. Why does the body can maintain the BP at a normal level at the first time?