Try this on yourself, and let me know the results in the comments! 😷 How the Allen Test is Performed The healthcare provider applies firm pressure to both the radial artery (thumb side) and the ulnar artery (pinky side) at the wrist. The patient opening closes their fist to drain the blood. The provider releases pressure on the ulnar artery only, while keeping the radial artery compressed. 👉 Interpreting Results: ✅ Positive (Normal): hand flushes back to its normal pink color within 5 to 15 seconds. This indicates the ulnar artery provides enough collateral blood flow to keep the hand healthy if the radial artery is blocked. 🚨 Negative (Abnormal): The hand remains pale for longer than 15 seconds. This suggests inadequate collateral circulation, and the radial artery should not be used for a planned procedure. 😷 Comment NEWSLETTER for more similar health information, and I will send you a link to my free weekly newsletter 🗞️ #allentest #vascular #newsletter