Vascular surgery is needed when a patient has vascular disease that can be treated by nonsurgical treatments, minimally invasive (keyhole) techniques, or open surgical procedures. The main purpose of vascular surgery is to treat vascular diseases, which are diseases of the arteries and veins. Arterial disease is a condition in which blood clots, arteriosclerosis, aneurysms and other vascular conditions cause symptoms or complications or are at risk of doing so. Venous disease affect the veins, and can also cause symptoms or complications. The treatment of acute deep vein thrombosis without complications is not undertaken by vascular surgeons, but is managed by other specialists. Service At Barnsley Hospital Vascular out-patient clinics and day-case varicose veins treatment is undertaken locally at Barnsley Hospital by staff from the Sheffield Vascular Institute, based at the Northern General Hospital. Most specialised investigations and all in-patient vascular procedures are undertaken in Sheffield. Patients with varicose veins will usually have their clinical assessment and a venous duplex scan done at a one-stop clinic appointment in Barnsley and would be offered treatment if appropriate. A small proportion of patients would need specialised tests of treatment in Sheffield. Varicose veins are treated by conventional open surgery or minimally invasive endovenous/Laser surgery in Barnsley, and no longer have to travel to Sheffield for Laser treatment as was the case in the past. In-patients under the care of other specialists in Barnsley are reviewed by the visiting vascular surgeons, or might be transferred to Sheffield as required.