颅内压降低系指一侧卧位腰椎穿刺测压低于0.70kPa，临床常有头痛、头昏、恶心、呕吐、疲倦乏力和精神障碍等表现。
结果：先期积水腹腔分流术后颅内压降低，术后无肿瘤复发及粘连再次出现脑积水。
Results: Transcranial pressure was decompressed after pre peritoneal shunt, which can prevent recurrent accretion and hydrocephalus.
结论颅骨缺损的病理状态下，颅内压高低与颅骨缺损面积有关，颅内压降低可能是导致颅骨缺损综合征的重要原因。
Conclusion Under skull defect state the intracranial pressure has relations with skull defect area. The decrease of intracranial pressure may be an important cause leading to skull defect syndrome.
意识水平降低是颅内压增高的一个临床征象，而不是治疗的预期结果。
A decreasing level of consciousness is a classic sign of increased intracranial pressure, not an expected outcome of therapy.
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