Cannulae; implants consisting of artificial materials; medical and surgical catheters; protective guards for catheters; catheters incorporating filters; surgical implants comprised of artificial materials; catheters; physiological measuring apparatus for medical use; catheters for surgical use; medical implants; apparatus for use in medicine in the drainage of incisions; pumps for medical purposes; subcutaneous valves for implantation; catheters for medical use; cardiovascular catheters; shunts for use in the blood circulatory system; instruments for cardiac stimulation; implantable pacemakers; tubing for use with catheters; catheter skin anchor instruments; medical implants made of artificial materials; drainage tubes for medical purposes; medical infusion pumps; implanted prosthesis; neurosurgical adaptors; artificial orthopaedic implants; cardiovascular pumps; cardiovascular instruments; hydrocephalus valves; silicone prosthetic implants; prosthetics and artificial implants; medical instruments; biodegradable implants; artificial implants; valves for use in medical infusion instruments; intracardiac catheter; pipes for surgical applications; valves for the treatment of hydrocephalus; medical tubing; prosthetic implant instruments; heart pacemakers