士兵在战争或训练中不可避免会遇到各种危险,当手臂或者脚受伤之后通常的做法是注射凝血剂并进行包扎减少该部位血液流动达到止血愈合效果;但是当伤口出现在颈部、肩部等部位止血就变得异常困难,为此美国约翰霍普金斯大学的学生研究出了新的止血方法,通过在伤口注入可硬化泡沫,能够迅速在伤口上形成屏障, It is inevitable for soldiers to encounter various dangers in war or training. After the arm or foot is injured, it is common practice to inject coagulant and bandage to reduce the blood flow in the area to achieve the hemostasis healing effect. However, when the wound appears on the neck and shoulders Department and other parts of the hemostasis becomes very difficult, so the United States Johns Hopkins students developed a new method of hemostasis by injecting a hardenable foam in the wound, the wound can quickly form a barrier,