The ultrastructural pathological characteristics and dynamic changes of brain vessel after subarachnoid hemorrhage in experimental rabbits
- VernacularTitle:兔实验性蛛网膜下腔出血后脑血管超微结构的病理特征与动态变化
- Author:
Jinning SONG
;
Qi LIANG
;
Ming ZHANG
;
Wuling CHEN
- Publication Type:Journal Article
- Keywords:
subarachnoid hemorrhage;
pathological change;
ultrastructure;
delayed cerebral vasospasm
- From:
Journal of Xi'an Jiaotong University(Medical Sciences)
1982;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To discuss the ultrastructural pathological characteristics and dynamic changes of brain vessel after subarachnoid hemorrhage(SAH),and the mechanism of these changes in delayed cerebral vasospasm.Methods SAH model was made by infusing blood twice into the cistern magna of Japanese rabbits.The animals were divided randomly into SAH group,saline group,puncture group and blank group,at 1 h,3 d,5 d,7 d and 10 d after the first infusion the animals were perfused and basilar artery was harvested.Ultrastructural changes were observed under light microscope and electron microscope.Results Under the light microscope,the vessel wall became thick,the vessel cavity became narrow,the endothelia cells became swollen,vacuoles could be found in the chromatin,inner elastic membrane became reductus and broke.Under the electron microscope,the close connection between the endothelial cells disappeared,the membrane of the cells fell off,and the mitochondria became swollen,vacuoles could be seen,the chromatin became concentrated,heterochromatin could be seen,smooth muscle became deformed,chromatin became uneven, myofilament had derangement and fragmentation and dissolved,vacuolus could be seen in the kytoplasm,mitochondrion became swollen.The structural change of basilar artery under the light microscope got similar to that under the electron microscope;slight change was observed right after 1 h of SAH,significant change was observed at 3 d,and most obvious change was observed between 5 d and 7 d.Conclusion Ultrastructural changes were observed in the basilar artery after SAH,and significant dynamic changes were observed in the progress.The damage of endothelia cells may be the important factors which cause delayed cerebral vasospasm.
