To institute forced diuresis as in case of poisoning. Sites - Medial cubital vein or Saphenous vein over the ankle. The selected vein is made more prominent by applying a tourniquet proximal to it. The selected site is cleaned and prepared with savlon, ether and iodine-spirit. It is draped with sterile cloth.
Local anaesthesia is infiltrated on and around the vein.
The incision is made at right angle to long axis of the vein. The subcutaneous tissue is dissected and muscle fibres are seperated to visualise the vein. Two threads are passed below the vein. Two ends of each threads are approximated with artery forceps. The vascular structure is confirmed to be vein by Non-obliteration of the radial pulse on lifting the loops of thread containing the artery.