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扳机指(狭窄性腱鞘炎)

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ID: ANH19223chis
医学动画文字记录:前臂含有屈肌,使手指可以弯曲。一种叫做肌腱的长绳状结构,将这些肌肉和手指包括拇指的骨连接起来。每个肌腱都被一个叫做肌腱鞘的组织所环绕。这样,当手指活动时,肌腱就能顺畅地滑动。腱鞘由被称为滑车的组织带固定。它们使肌腱紧靠骨以达到最佳的肌腱功能。当屈肌收缩时,滑车帮助引导肌腱弯曲手指。通常情况下,当手指弯曲和伸展时,肌腱在滑车中平稳滑动。扳机指也被称为扳机拇指或狭窄性腱鞘炎,是指手指底部的滑车发炎肿胀的情况。这使得肌腱更难通过滑车。经年累月,肌腱也会不断肿胀,并在滑车附近形成一个肿块。当弯曲手指时,肌腱肿胀的区域可能会引起一种抓握感或触发感,因为它最初挂在滑车上,然后滑到滑车下面。如果不治疗,肌腱可能肿胀到不能从滑车下面通过。最终,你的手指可能会被卡在弯曲的位置。如果你有扳机指,你可能会有以下一种或多种症状,手指底部手心处有一个柔软的肿块,当你动手指时有一种卡顿,弹响或卡锁的感觉,当你弯曲或伸直手指时疼痛。扳机指的病因尚不清楚,但一些情况会增加患扳机指的风险,包括糖尿病,类风湿关节炎,痛风和反复受伤。用力和反复的抓握也会增加风险。要治疗轻微的扳机指,医生会建议你休息手,避免使其恶化的活动。医生可能会给你开消炎药或注射皮质类固醇来消肿。你可能还需要戴上手指夹板来保持手指伸直。如果非手术治疗不起作用,医生可能会建议你进行外科手术。手术开始前,医生会在你的手掌上做一个小切口。然后切断滑车,使肌腱脱离。在手术结束时,用缝线缝合切口,并用软绷带包扎。要了解更多关于扳机指的信息,请咨询医生。

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