Butcher Kenneth, Laidlaw John
Department of Neurosciences, Royal Melbourne Hospital, Melbourne, Australia.
J Clin Neurosci. 2003 Mar;10(2):158-67. doi: 10.1016/s0967-5868(02)00324-7.
Primary intracerebral haemorrhage (ICH) refers to spontaneous bleeding from intraparenchymal vessels. It accounts for 10-20% of all strokes, with higher incidence rates amongst African and Asian populations. The major risk factors are hypertension and age. In addition to focal neurological findings, patients may present with symptoms of elevated intracranial pressure. The diagnosis of ICH can only be made through neuro-imaging. A CT scan is presently standard, although MRI is increasingly important in the evaluation of acute cerebrovascular disease. A significant proportion of intracerebral haematomas expand in the first hours post-ictus and this is often associated with clinical worsening. There is evidence that the peri-haematomal region is compromised in ICH. This tissue is oedematous, although the precise pathogenesis is controversial. An association between elevated arterial pressure and haematoma expansion has been reported. Although current guidelines recommend conservative management of arterial pressure in ICH, an acute blood pressure lowering trial is overdue. ICH is associated with a high early mortality rate, although a significant number of survivors make a functional recovery. Current medical management is primarily aimed at prevention of complications including pneumonia and peripheral venous thromboembolism. Elevated intracranial pressure may be treated medically or surgically. Although the latter definitively lowers elevated intracranial pressure, the optimal patient selection criteria are not clear. Aggressive treatment of hypertension is essential in the primary and secondary prevention of ICH.
原发性脑出血(ICH)是指脑实质内血管的自发性出血。它占所有中风的10%-20%,在非洲和亚洲人群中的发病率较高。主要危险因素是高血压和年龄。除了局灶性神经学表现外,患者可能还会出现颅内压升高的症状。ICH的诊断只能通过神经影像学检查来确定。目前,CT扫描是标准检查方法,不过MRI在急性脑血管疾病的评估中越来越重要。相当一部分脑内血肿在发病后的最初几个小时内会扩大,这通常与临床病情恶化有关。有证据表明,ICH患者血肿周围区域会受到损害。该组织存在水肿,但其确切发病机制仍存在争议。有报道称动脉压升高与血肿扩大之间存在关联。尽管目前的指南建议对ICH患者的血压进行保守管理,但早就应该进行急性降压试验了。ICH与早期高死亡率相关,不过仍有相当数量的幸存者实现了功能恢复。目前的药物治疗主要旨在预防包括肺炎和外周静脉血栓栓塞在内的并发症。颅内压升高可通过药物或手术治疗。虽然手术确实能降低升高的颅内压,但最佳的患者选择标准尚不清楚。积极治疗高血压对于ICH的一级和二级预防至关重要。