动静脉畸形切除术后动脉停滞的病理生理学评估
Pathophysiologic assessment of stagnating arteries after removal of arteriovenous malformations.
作者信息
Miyasaka Y, Yada K, Ohwada T, Kitahara T, Kurata A, Irikura K
机构信息
Department of Neurosurgery, Kitasato University School of Medicine, Kanagawa, Japan.
出版信息
AJNR Am J Neuroradiol. 1993 Jan-Feb;14(1):15-8.
PURPOSE
To assess the hemodynamics and pathophysiology of stagnating arteries after removal of arteriovenous malformations (AVMs).
SUBJECTS
50 patients with supratentorial pial AVMs underwent pre- and postoperative angiographic studies.
RESULTS
The following characteristics were found to correlate with stagnating arteries: 1) advanced patient age, 2) large AVM size, 3) markedly dilated feeders, 4) early postoperative angiograms, and 5) delayed restoration of feeding artery diameter.
CONCLUSIONS
The rate of blood flow in the former feeding arteries, expressed as v x pi x r2 (v = mean velocity, r = vessel radius), suddenly decreases after removal of AVMs. When dilatation persists postoperatively in these arteries the flow velocity decreases and stagnation takes place. Delayed postoperative restoration of feeding artery diameter may be caused by a decrease of elasticity due to long-standing hemodynamic stresses, and by increased postoperative vascular resistance of these arteries.
目的
评估动静脉畸形（AVM）切除术后停滞动脉的血流动力学及病理生理学变化。
对象
50例幕上软膜AVM患者接受了术前和术后血管造影研究。
结果
发现以下特征与停滞动脉相关：1）患者年龄较大；2）AVM体积较大；3）供血动脉明显扩张；4）术后早期血管造影；5）供血动脉直径恢复延迟。
结论
切除AVM后，以前供血动脉中的血流速度（表示为v×π×r²，v =平均速度，r =血管半径）突然降低。如果这些动脉术后持续扩张，血流速度会降低并发生停滞。术后供血动脉直径恢复延迟可能是由于长期血流动力学压力导致弹性降低，以及这些动脉术后血管阻力增加所致。
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