Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Normal
Insert the needle into the vial whilst upright and do not inject air into it, flip upside down and draw. Assuming you stick to 23-25g pins.
We use essential cookies to make this site work, and optional cookies to enhance your experience.
See further information and configure your preferences