In today’s fast-paced world, we’re all focused on retaining numbers. We’re expected to remember telephone numbers, ATM pin numbers, social security numbers, the birthdays of loved ones, and so forth. For law enforcement officers, it’s a major aspect of the job to remember an extensive list of police codes when responding to an incident. But how many can recall the results from their last blood pressure test or their glucose and cholesterol levels? These unique numbers are vital too, and knowing what they mean and why physicians perform such tests can potentially make the difference between life and death.