Beyond two weeks (up to four weeks) and in ambulant patients, there is some evidence for treatment with plasma exchange, but no evidence for IVIg use.

• 对于尚可行走的格林-巴利综合征患者，以及神经系统症状体征出现已超过2周的格林-巴利综合征患者，有一些证据显示血浆置换疗法有一定疗效；