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DynaPulse Pathway Non-invasive Blood pressure and Hemodynamic Profile Measurement

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Tips For An Accurate Blood Pressure Measurement

  • The cuff must be the correct size for the patient's upper arm. Using a too-small size (undersized) or over-tightened cuff will result with higher readings on blood pressures, and a too-big size (over-sized) cuff will produced a lower reading. Since a regular cuff is designed for a normal cylindrical-shape upper-arm, for people with large and/or cone-shape upper arm, even larger fluctuations, 10-20 mmHg, in blood pressure measurements can occur, especially when using an undersized cuff. In such case, some published studies suggested that blood pressures, systolic and diastolic, might be obtained by putting the cuff around the lower-arm with its level raised to the same height of the heart.

  • Make sure that the cuff is not wrapped around the arm too tightly. The cuff should be snug around the arm when there is no air in the cuff.

  • Patients should rest and relax for at least 5 minutes before their blood pressure is measured.

  • Take two or three measurements each time and record the results. Do not rely on a single measurement. A common practice at doctor's office normally will take 3 measurements and using the 2nd and 3rd reading as reference or average. The first reading, which may be taken while the patient is not quite rested and/or the arm is not quite relaxed, therefore a higher reading in systolic may be resulted.

  • Set the measuring high range at 160 mmHg (default), or 10 to 20 mmHg above an estimated or past-reference systolic in case of high blood pressure, and low-range at 50 mmHg (default) or 5-10 mmHg below an estimated or past-reference diastolic point. An optimal setting of ranges will provide the best measuring conditions for obtaining an accurate DynaPulse blood pressures and arterial waveforms.

  • Adjust the air release time to 25-35 seconds for comfort and best measuring conditions for DynaPulse blood pressure and waveform measurements. Less than 20 seconds or longer than 50 seconds may give larger fluctuation, greater than 5 mmHg, in systolic measurement. When air release time is too long, it's uncomfortable and may create additional motion artifacts during the blood pressure measurement.

  • When taking repeated measurements, deflate the cuff and elevate the arm. Allow 1-3 minutes between measurements to ensure normal circulation is restored.

  • The patient should remain relaxed and remain motionless during each blood pressure measure measurement. Repeat a measurement when the patient has coughed, sneezed, or has taken a deep breath since these can alter a person's blood pressure.

  • Readings should be taken before the patient has eaten.

  • A rolled-up sleeve may constrict blood flow through the arm. Putting all or part of the cuff on top of a sleeve of thin material will not affect the DynaPulse measurement.

  • Blood pressure may be higher after exercise, after drinking coffee, tea, or any caffeinated beverage. Eating, or while when under emotional or physical stress will affect readings as well. In general, any circumstance leading to an increase in heart rate tends to cause blood pressure to rise.

  • DynaPulse uses a single tube cuff identical to a clinical used D-ring cuff. In any application, please make sure the tube is properly placed and is not kinked. Non-D ring type cuffs may also work with a DynaPulse unit.

  • Always save blood pressure data for future reference.