Sentence:  Attached to each of these beds is a strong leathern strap, with a <WSD>wristlet</WSD>, for securing the arm of the patient at night. ... The scene in the dormitories for the paralytic and furious was distressing; camisoles, straps, <WSD>wristlets</WSD>, leg and ankle locks everywhere abounded. 
Meaning of the word marked with <WSD> tags:  A handcuff.