| Device, galvanic skin response measurement2 groups | 33 | 2 |
| Electrical tumor treatment fields / Electrical tumor treatment fields for non-small cell lung cancer2 groups | 22 | 2 |
| Standard polysomnograph with electroencephalograph2 groups | 66 | 2 |
| Stimulator, carotid sinus nerve2 groups | 37 | 2 |
| Stimulator, electrical, implanted, for parkinsonian symptoms / Stimulator, electrical, implanted, for essential tremor3 groups | 38 | 3 |
| Stimulator, muscle, powered5 groups | 113 | 5 |
| Stimulator, nerve terminus, totally implanted for chronic intractable post-amputation pain of the lower limb3 groups | 47 | 3 |