Abstract: An arm support for use in a medical procedure, comprises an arm support strap and a hand support. The arm support strap comprises a first end that is configured to pass around the arm of a patient and secure to a region of the arm support strap, a support region for supporting an arm of the patient, and a second end configured to pass across the torso of the patient to be secured so as to support the arm securely against a side of the torso in a position substantially co-planar with the torso. The hand support comprises a first region adapted to secure the hand support to the arm support strap, and a second region adapted to engage with a hand of the patient for securing an associated forearm of the patient in a supinated, externally rotated position. The support is for use in radial access procedures, securing the patient's wrist in a dorsiflexed position.