Background Shock is a state of cellular and tissue hypoxia caused by reduced oxygen delivery or increased oxygen consumption. We tend to use the patients systolic blood pressure (SBP) as our main diagnostic test for shock as it is readily available and simple to assess. Therefore, patients with a SBP of 90 mmHg or less are considered to be in shock until proven otherwise. Caution should be noted for special populations such as pediatrics, geriatrics or hypertensive patients who have …