Medical devices mainly belong to Class 44 trademarks, which mainly include medical services; veterinary services; human or animal health and beauty services; agricultural, horticultural and forestry services

The categories are as follows:

[4401]Medical services

[4402]Health and beauty services

[4403]Providing services to animals

[4404]Agricultural and horticultural services

[4405]Single service

Medical device trademarks are also found in Class 5 and Class 10. If you want to do brand protection, I suggest you learn about several categories.