家兔眼原发性冲击伤的实验研究

Experimental studies of Primary Blast Injuries in Rabbit Eyes

用ＢＳＴ－Ⅲ型生物激波管，研究了白毛家兔在眼部局部暴露致伤的条件下，眼原发性冲击伤的特点。冲击波正压在１１００ｋＰａ（３．８ｍｓ）以上，可造成眼球破裂、眼球脱出或下陷，眼眶骨折甚至死亡等严重损伤；６００ｋＰａ（１１ｍｓ）的冲击波易引起结膜破裂、房水混浊等；２３０ｋＰａ（１７ｍｓ）的冲击波作用后，伤情轻微。实验表明：结膜水肿、瞳孔缩小、眼压下降以及视网膜破裂水肿，是兔眼冲击伤的主要临床表现。

With model-Ⅲ blast shock tube ,the primary eye blast injuries of albino rabbits were studied with the eyes straight-on and locally exposed to the shock waves. The results showed that a more intensive overpres-sure (1100 KPa ,38ms) might cause severe ocular injuries such as ophthalmorrhexis,proptosis or enophthal-mos, orbital fracture or even death;a moderate overpressure (660 kPa,11ms)resulted in conjunctival split,the aqueous turbidity, etc; and a weakened one (230 kPa, 17ms)only caused slight ocular injure. The study has proved that the main symptoms of eye blast injure are conjunctival congestion and edema, pupil contrac-tion, decrease ofintraocular pressure and retinal rupture and edema;