Medicine Blood Bank & Transfusion Therapy 76f0ee5a Which of the following is not done before ABG? A Allen test B Heparin to rinse the syring C Flexion of wrist D Poking the aery at 45 degrees angle High-Yield Explanation Done Before ABG Allen test: integrity of palmer arch. Heparin: to rinse the syringe Poking the aery at 45-degree angle. Extend wrist joint: Radial Aery tent.