Ask AI: write a method for drawing blood in steps to be used for ELISA in steps

1. Gather necessary supplies: gloves, tourniquet, syringe, collection tube, alcohol swabs 2. Prepare the patient for the draw: explain the procedure and secure their consent, secure the patient's arm and apply the tourniquet 3. Cleanse the patient's skin with an alcohol swab 4. Insert the needle into the vein at an angle of 15–30° and draw up the required amount of blood 5. Remove the syringe from the vein and apply pressure to the puncture site with a dry gauze 6. Place the syringe into a collection tube, ensuring the collection tube is tightly capped with the tube stopper 7. Label the collection tube with the patient's name, date and time of blood drawn 8. Place the collection tube into a centrifuge and spin at 2000-3000 RPM for 10 minutes 9. Discard the red blood cells and use the serum or plasma for ELISA assay