A fistula is essential for dialysis. This is created surgically by joining a vein to an artery in the area of the wrist. Impure blood is first drawn from the fistula on the patient's wrist, passed through the dialyser machine and clean blood is returned to the patient. Fistula surgery costs between Rs. 7,000/- to Rs. 10,000/-, which is beyond what many patients can afford. Upto June 2010, TANKER has sponsored free fistula surgeries for 70 underprivileged patients.