These miniature robots would function like their full-size equivalents with their own sensors, and propulsion systems and could perform small tasks like delivering chemotherapy 1000 times more powerful than using drugs and would not cause as many side-effects to patients like the current treatments do.

https://getreferralmd.com/2015/02/the-10-biggest-innovations-in-health-care-technology-in-2015/

The range of medical technologies used in nonclinical environments runs the gamut in complexity from simple materials used for administering first aid to sophisticated devices used for delivering advanced medical treatment, and in size from tiny wireless devices to massive machines. Some medical devices have been used in the home for many years; other devices are just beginning to migrate there; and emergent technologies present new opportunities for health care management in the home. While some of these devices were explicitly designed for use outside formal health care settings by professional home health caregivers as well as the general public, many devices were not. Consequently, many human factors challenges must be addressed to render these technologies, devices, and systems safe, usable, and effective for use in environments beyond the institution and for use by the much more varied population of users in these environments. This chapter discusses standalone medical devices used in home health care.

Surgeons have used a robot to operate inside the eye and restore sight - in a world first.

The robot was developed by a Dutch company, a spin-out of Eindhoven University of Technology. 

Oxford's John Radcliffe Hospital used it, controlled via a joystick, to take away a membrane one hundredth of a millimetre thick. The robot which helps surgery is common, but until now had never been used inside the eye.