[Specific features of cerebral blood flow changes after surgical removal of chiasmatic-sellar region tumors using data of transcranial duplex sonography].
Aim of the study was to discover specific features of linear blood velocity in early postoperative period in patients with tumors of chiasmatic-sellar region. Measurement of linear blood velocity using transcranial duplex sonography was performed in 294 patients with tumors of hypothalamo-hypophyseal area (149 suprasellar pituitary adenomas, 145 endosuprasellar, hypophyseal and ventricular craniopharyngiomas). It was found that vasospasm of different severity was present in 62% cases after surgical removal of chiasmatic-sellar region tumors. This "primary vasospasm" was associated with intraoperative damage to a vessel. Delayed angiospasm was caused by subarachnoid hemorrhage into basal cisterns due to hyperactivation of neuroendocrine systems of adenohypophysis and aldosterone. Persistent vasospasm with linear blood velocity over 200 cm/s results in irreversible ischemic damage of subcortical and hypothalamic structures.
Madorskiĭ
S V
SV
Parfenov
A L
AL
Voronina
I A
IA
Shovikova
O A
OA
Safin
A M
AM
D000236:Adenoma / Q000601:surgery*; D002560:Cerebrovascular Circulation / Q000502:physiology*; D003397:Craniopharyngioma / Q000601:surgery*; D006801:Humans; D019635:Neurosurgical Procedures / Q000009:adverse effects / Q000379:methods; D010911:Pituitary Neoplasms / Q000601:surgery*; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology; D017585:Ultrasonography, Doppler, Transcranial; D020301:Vasospasm, Intracranial / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology