Digital blood pressure monitors typically employ the oscillometric method to measure blood pressure. However, the way each manufacturer analyzes the measurement signals and calculates systolic and diastolic values can differ. This variance in methodology has led to variations in accuracy among blood pressure monitors, which have been observed in several studies.
iHealth boasts extensive experience in designing blood pressure monitors, and our devices have undergone rigorous clinical studies conducted by independent medical centers adhering to the highest international standards, confirming their high accuracy.
Moreover, individual variations play a role in blood pressure measurement. Just as two doctors using stethoscopes may obtain different blood pressure values, different blood pressure monitors may suit individuals differently. Additionally, variations can occur between consecutive measurements due to changing physiological conditions and the influence of secondary factors like discussion, noise, and movement.
Discrepancies in blood pressure measurements could be due to one of many reasons, including differences in how manufacturers analyze measurement signals and differences in environmental and physiological factors. The best way to compare two blood pressure monitors is to obtain readings simultaneously using the same cuff with the help of a "Y tube" or "T tube." Alternatively, taking measurements in the same physical setting within one minute could also minimize the environmental influences.
While using the cuff on your upper arm, please be sure:
- To check that the cuff size matches the circumference of the upper arm;
- To wear the cuff comfortably tight, with the bottom of the cuff about 1/2" above the crease on the inside of the elbow and one finger of space between the cuff and your bare arm;
- Not to roll up your sleeve or wear the cuff over thick clothing;
- To keep the cuff tubing centered on the inside of your arm and aligned with the center of your hand (for the left arm) or your pinky (for the right arm);
- To keep the cuff at the same level as your heart, either by lying flat or positioning your arm on a flat surface;
- To relax for five minutes after sitting down to avoid impact from physical exertion;
- To sit with your feet flat on the floor without crossing your legs (if sitting);
- To remain quiet and still during measurements.
If you have followed the instructions, but the readings are still significantly higher or lower than measurements obtained at medical facilities, your device could be defective. Please send us the order detail to check its warranty status:
- Where and when you purchased the device?
- What is the order number?
- What is the lot number/serial number (SN) of the device?
- What is the recipient’s name, phone number, and shipping address?