The hand is normally supplied by blood from the ulnar and<unk>  arteries. The arteries undergo anastomosis in the hand. Thus, if the blood supply from one of the arteries is cut off, the other artery can supply adequate blood to the hand.  A minority of people lack this dual blood supply.<unk> 's<unk>  or oximetry/plethysmography should be performed before the procedure to confirm that there is sufficient blood flow in the ulnar artery should there be loss of patency in the<unk>  artery due to either thrombosis or spasm which can result in gangrenous finger or had loss.
Radial catheterization allen's test
Ottawa ankle rules
Posterior drawer test
Peripheral arterial disease CT
Anderson-Darling test
Deep vein thrombosis marder score
Peripheral arterial disease ultrasound
Shock physical examination