<p>TRUE METRIX Control Solutions are available in levels 1, 2, and 3. The solutions are designed to be used with the TRUE METRIX System (meter and blood glucose test strips). </p><p><strong>Recommended use:</strong></p><ul><li>Before using the system to perform a blood test</li><li>When opening a new vial of strips</li><li>If blood results seem unusually high or low based on patients symptoms and condition</li><li>If strip vial has been left open and exposed to extreme heat, cold, or humidity</li><li>Whenever a check on the performance of the system is needed</li><li>If meter damage is suspected (meter dropped, crushed, wet, etc.) </li></ul>