what happens when a vein blows
Save. A blown vein is essentially an injury to a vein due to the insertion of an IV. This often takes place when the needle goes in too deep, puncturing the vein on both sides, Not only can this cause the vein to become unviable, but may also prompt leakage of both blood and any fluids administered through the IV.reating the Blown Vein. For relatively minor injuries to the vein, or those caught as soon as they happen, use your hands to compress the blood vessel. It's the most effective form of treatment by far. By placing pressure on the area, you minimize blood loss and reduce inflammation.