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Reactivity of cerebral arteries after subarachnoid hemorrhage in rats after phosphoramidon administered

机译:磷酰胺治疗大鼠蛛网膜下腔出血后脑动脉的反应性

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The aim of the study was to quantify cerebral vasospasm in rats after subarachnoid hemorrhage (SAH) by morphometric examination of basilar artery and to evaluate the influence of Phosphoramidon on basilar artery constriction. The rat cisterna magna (CM) was cannulated and after 7 days SAH was developed by administration of 100 μl autologic, non-heparinized blood to the CM. The sham subarachnoid hemorrhage was developed by intracisternal administration of 100 μl of artificial cerebrospinal fluid. After 60 min and after 24 h Phosphoramidon was injected into the CM in a dose of 40 nmol diluted in 50 μl of cerebrospinal fluid. After perfusion, the brain was removed from the skull and histological preparations of the basilar artery were made. The internal diameter and wall thickness of basilar arteries were measured by interactive morphometric method. The most severe vasospasm was found in rats after SAH and the administration of Phosphoramidon in the late phase after SAH caused the dilatation of the basilar artery. The presence of numerous infiltrations composed of neutrophils and macrophages correlated with advanced vasospasm (index of constriction 5 times lower than normal), suggesting the role of other factors participating in the late phase of vasospasms after SAH.
机译:本研究的目的是通过形态学检查基底动脉的形态来量化蛛网膜下腔出血(SAH)后大鼠的脑血管痉挛,并评估磷酰胺对基底动脉收缩的影响。给大鼠大水罐(CM)插管,并在7天后通过向CM施用100μl非肝素化自体血液形成SAH。假性蛛网膜下腔出血是通过脑池内施用100μl人工脑脊液而发生的。 60分钟后和24小时后,将磷酰胺以40 nmol的剂量注射到CM中,稀释在50μl脑脊液中。灌注后,将大脑从颅骨中取出,并制备了基底动脉的组织学制剂。交互式形态计量学方法测量了基底动脉的内径和壁厚。在SAH后大鼠中发现最严重的血管痉挛,在SAH引起基底动脉扩张后的后期服用磷酰胺。由中性粒细胞和巨噬细胞组成的大量浸润与晚期血管痉挛相关(收缩指数比正常低5倍),提示其他因素参与了SAH晚期血管痉挛的作用。

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