To fill out the blood pressure record, fill in all the numbers on the monitor screen for systolic and diastolic pressure. - Systolic = systolic pressure = maximum pressure, - Diastolic = diastolic pressure = minimum pressure. Calculate your average: - Systolic average > add up all systolic measurements and divide by 18, - Diastolic average > add up all the diastolic measurements and divide by 18. If in doubt, your doctor will perform this average.