In the past, scientists has been using animal model to observe di-rect effect on lung injury by injecting hydrochloric acid ( HC1) to whole lung of animals, but very few studies were found to study on ad-vance lung injury.

• 以往国内外学者多研究给动物双肺内注入盐酸引起的直接肺损伤，却少见研究误吸后出现的继发性肺损伤。