PhantomAR: gamified mixed reality system for alleviating phantom limb pain in upper limb amputees-design, implementation, and clinical usability evaluation.

Only eight amputees used the system, and there was no control group, so the pain drop cannot be compared with usual care or mirror therapy. The result came from one session, so it says nothing about long-term pain relief or repeated use. Pain and embodiment ratings were self-reported, so they could be influenced by subjective bias. Pain responses were variable: two patients reported increased pain during use. The study cannot tell whether the effect came from the virtual arm, the game, movement, haptic feedback, or the sensors. The HoloLens 2 field of view could limit immersion, especially when users move outside the central vision area. The system was tested only in transradial amputees, so it does not show what would happen for upper-arm amputees. The paper does not report dropouts.

The supplied text does not include a conflicts-of-interest declaration; the publication types note non-U.S. government research support.

Do not read the 58% pain reduction as proof that the virtual arm alone works. The session also included a HoloLens headset, a Myo armband, inertial sensors, haptic feedback, and game-like scenes, and the study had no control group.