氩激光对兔脑组织作用的实验研究

本研究讨论了相等能量密度的、非聚焦的氩激光作用于兔脑组织后所产生的急、慢性反应。分别在26只兔脑皮层上作定点连续照射6s,在照射后的30min,24h、15天和30天后的兔脑标本,组织学上现发有明显界缘的气化中心,其平均深度为2mm,宽度为3mm,其外依次为凝固、坏死和水肿带,宽度不超过1mm。周围脑组织的热反应也是很小的。30天后见有胶质细胞增生修复创伤。

EXPERIMENTAL STUDY ON EFFECTS OF ARGON LASER ON CEREBRUM TISSUE IN RABBITS

This study describes the acute and chronic responses of brain tissue to injury by nonfocused argon (Ar) laser beam with equal power density.Cortices of 26 rabbits were exposed to laser pulses for 6 s and examined 0.5 hour, 24 hours, half a month and 1 month after injury respectively.Histologically, all brain tissues were sharply demarcated by hemispheroidal defects with a vaporized center surrounded by a zone of coagulation, necrosis and edema.The depth of this vaporized center is 2 mm, and the width is 3mm.The width of the zone of coagulation, necrosis and edema was less than 1 mm.The thermal damage caused by the argon Laser beam was minimal in the surrounding tissue.One Month after injury, a core of coagulation and necrsis surrounded by mild fibrillary gliosis was observed.