Surgical apparatus and instruments for treating cardiovascular disease; medical apparatus and instruments for treating cardiovascular disease; artificial prosthetic vascular grafts; knitted polyester vascular grafts; stents; prostheses; vascular prostheses; vascular prostheses with flared outflow; vascular prostheses with customisable outflow; woven synthetic stent grafts; expanded polytetrafluoroethylene (ePTFE) vascular grafts; surgical implants comprising prosthetic materials; suture mater...