MIT engineers created a thread-like robot that can glide through the brain’s blood vessels and could deliver clot-reducing drugs to treat strokes or aneurysms. The robotic thread could offer an alternative to open brain surgery, and it could be controlled by surgeons outside of the operating room.

from https://www.engadget.com/2019/08/29/mit-robotic-thread-brain-surgery/
https://o.aolcdn.com/images/dims?quality=85&image_uri=https%3A%2F%2Fo.aolcdn.com%2Fimages%2Fdims%3Fcrop%3D639%252C399%252C0%252C0%26quality%3D85%26format%3Djpg%26resize%3D1600%252C1000%26image_uri%3Dhttps%253A%252F%252Fs.yimg.com%252Fos%252Fcreatr-uploaded-images%252F2019-08%252F156f28c0-ca7d-11e9-9d6d-e15830b73b64%26client%3Da1acac3e1b3290917d92%26signature%3D0dcfb23666d8fba4181803a247ab1cadad2b4900&client=amp-blogside-v2&signature=8adab5a17c23607a3d197e7671fdfb5d227b4c7f