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Video: Research: Blood Pressure May Differ When Measured On Different Parts Of The Body
Research: blood pressure may differ when measured on different parts of the body
A patient's blood pressure level has a huge impact on the decisions doctors make. This indicator may be especially important for patients in intensive care and intensive care units.
Photo: CC0 Public Domain
It turns out that blood pressure readings can be very different when measured on different parts of the body. The new data has been published in Scientific Reports.
“Our patients in the neurological intensive care unit may require very tight pressure maintenance,” Kathrina B. Siaron of Northwestern University Medical Center, study co-author, said in a press release.
Blood pressure has been measured by almost one method for over a hundred years. It is well known that this indicator can be very different for the same person at different times. Nevertheless, it is generally accepted that when measuring the pressure on different parts of the body of one patient, the difference in its indicators will be small.
In the study, the scientists included 80 people aged about 53 years. These were patients in the intensive care unit who were undergoing treatment for stroke, brain tumors and various neurological pathologies.
Pressure measurements were taken first on the shoulders and then on the forearms - simultaneously from both sides. In addition, in 29 patients, sensors for invasive pressure measurement were permanently installed in large vessels.
The average difference in systolic (upper) blood pressure from different sides was 8 millimeters of mercury (mm Hg) for the shoulders and 13 for the forearms. Similar indicators for diastolic (lower) pressure were 5 and 6. Scientists have indicated that in some cases the difference reached 15 mm Hg. Art.
In some patients, the difference between blood pressure readings measured at different sites could be 40 mm Hg. Art., scientists write. This difference can significantly affect the treatment a patient receives.
“If we measure the pressure on one arm, the patient may appear to be in good health, but the readings on the other arm may indicate a crisis,” says Professor DaiWai M. Olson, co-author of the study.
Among the possible reasons for such "jumps" in pressure, scientists call the patient's posture, anatomical features, the impact of existing diseases. Perhaps research into this problem will lead to a new protocol for measuring blood pressure.