锂

这项试验检测血液中锂的含量。锂是一种用来治疗躁狂抑郁症的药物。躁郁症是一种以周期性的抑郁和躁狂为特点的精神状态。这个周期短则几天或是几周，长则几个月或几年。在抑郁发作期，患者可能会感到伤心、绝望，无生活意义，失去日常活动的兴趣。他们也许很疲惫但难以入睡，有体重减轻或增加的经历，难以集中思想，并有自杀倾向。在躁狂发作期，患者可能有欣快，易怒，精力旺盛且有感觉夸大，缺乏判断力却参与危险的行为。有时患者会混合发作躁狂症和抑郁症。躁郁症可发生于成人和儿童。

        锂被用于稳定躁郁症患者的情绪，有时也用于其他药物治疗无效的抑郁症患者。坚持服用锂几周甚至几个月可影响个人的情绪，因此必须调整好药物的剂量，直至血液中的锂浓度达到稳定浓度。达到稳定浓度的实际剂量因人而异，并可能受到患者年龄、健康状况和其他正在服用的药物的影响。锂水平必须保持在一个狭窄的治疗范围内。剂量太小，药物治疗不会有效；剂量太大，病人会出现锂中毒的相关症状，如恶心、呕吐、腹泻、意识混乱和震颤。极高水平的锂可能会导致昏迷，痉挛甚至死亡。

采集手臂静脉血。

无需检测前准备。

Child and Adolescent Bipolar Foundation
Depression and Related Affective Disorders Association
National Alliance for the Mentally Ill
National Institute of Mental Health
Bipolar Brain: Lithium
NHS (UK): Guidelines for the Management of Patients on Lithium (PDF)

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