Donning and doffing
Most patients found that the device was relatively easy to put on. From a therapist’s perspective, only one therapist mentioned difficulties, specifically in the connection process of the elbow brace to the flange: sometimes the robot seemed to be in a slightly incorrect position. The large range of donning times of the HoloLens, from 10 to 151 s, reflects connection issues that were apparent in some cases. Despite this, the therapists valued the concept of the human-machine interface and perceived the donning and doffing times as acceptable. Particularly, the magnetic fixture of the elbow brace showed to be practicable in a clinical context, as it allows to don the brace in any comfortable position before attaching it to the robot. It also ensures a fast and easy disconnection from the robot. Regarding the donning and doffing times, this is supported by the results of Oliveira et al. [