颌面问高速投射物伤区软组织感染特点的实验观察

用初速１５００ｍ／ｓ，重１．０３ｇ钢珠致伤６只狗颌面部，伤后６，１２，２４ｈ取距伤道壁不同距离的肌肉组织做需氧及厌氧菌培养，实验发现，颌面高速投射物伤区，距伤道壁０．５ｃｍ以内的软组织，伤后６ｈ开始出现细菌感染，随致伤时间延长。

The experimental observation on characteristics of soft tissues infection in maxillofacial region wounded by high velocity missile]

In this experimental study, maxillofacial regions of dogs were wounded by steel spheres, which weight 1.03 g at a mean primary velocity of 1500 m/s. Aerobe and anaerobe bacteria in the muscles of different interval from wound track edge were cultured at different time after wound. The results showed that there was bacteria infection in the soft tissues between 0 and 0.5 cm from wound track edge in 6 hours after wound. The quantity of bacteria obviously increased following time prolonging, on the contrary, it was much lower than threshold value of bacteria infection within 24 hours. The experimental results suggested that there was obvious bacteria infection in the soft tissues within 0.5 cm distance from wound track edge in maxillofacial firearm wound region. During the debridement removing soft tissues within 0.5 cm distance from wound track edge, the infection of wound region could be controlled. Using effective antibiotics is an important measure of controlling infection of wound after debridement.