Is an electronic blood pressure monitor as reliable as a traditional blood pressure monitor?
Tensioning with manual sphygmomanometers is based on the auscultatory method. This method uses an occlusive cuff (allowing compression of the artery) and a stethoscope (to detect the noises generated during the passage of blood during the deflation of the cuff). There are 5 different phases (called Korotkoff sounds):
I: Appearance of the first sound,
II: Whispering tone,
III: its sharp and sharp,
IV: Weakening of the sound,
V: Disappearance of the sound, Systolic pressure is determined by phase I and diastolic pressure by phase V.
The electronic tensiometers is based on the oscillometric method. This method uses the analysis of oscillations of the arterial wall. When the cuff pressure is higher than the systolic blood pressure, small oscillations due to the shock of the compressed arteries can be sensed. When deflating the cuff, the gradual decrease in pressure in the cuff increases and then decreases the amplitude of these oscillations. The systolic blood pressure corresponds to the beginning of the increase of the amplitude of these oscillations. The diastolic pressure corresponds to the end of the fall in the amplitude of these oscillations.
Electronic tensiometers are reliable . The oscillometric measurement method has been proven and validated for several decades. However, there are some pathologies or some cases (pacemaker carriers, pregnant women, diabetics, people with asymmetric blood pressure, vascular stenosis or liver diseases) should consult the doctor to verify that the blood pressure monitor is well adapted to user.
Should I choose an electronic sphygmomanometer on my arm or wrist?
Each category of sphygmomanometer has its advantages and disadvantages.
The models on the wrist are of reduced sizes; they are easy to transport and convenient to put in place. On the other hand, they require more rigor when taking measurements because care must be taken to position them at the level of the heart so as not to distort the results. A blood pressure monitor placed too high will indicate lower than normal values; a blood pressure monitor placed too low will give higher values. Some models have an integrated position sensor that triggers the measurement when the monitor is in the correct position.
The models on the arm are more bulky and less easy to put in place.
In terms of reliability, except in special cases, both systems (arms and wrist) offer comparable accuracy. The results of one or the other system vary according to individual factors. For example, wrist arteries being very close to the surface and less tissue-covered than in the upper arm, in the case of an obese person, a wrist model is particularly recommended. In cases where both types of sphygmomanometers are suitable (no overweight, no strong arteriosclerosis, good understanding of positioning) if you must often move and take your blood pressure, opt for a model on the wrist . If, on the other hand, you intend to use this blood pressure monitor at home, choose a model on your arm. If in doubt, do not hesitate to ask your doctor for advice.
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