Key result
Backrest elevation of 30 degrees caused a significantly greater temporary reduction in blood pressure compared to 0 degrees (-15.3 mmHg vs -3.0 mmHg, p<0.01), whereas headrest elevation had no significant effect.
Why the study?
To examine the effect of combining head/neck and back bed elevation on blood pressure fluctuations during bed gatch elevation.
Does the degree of headrest and backrest elevation affect orthostatic blood pressure fluctuation in healthy adults?
RCT (n=10)
Randomized crossover
No
Does the degree of headrest and backrest elevation affect orthostatic blood pressure fluctuation in healthy adults?
Absolute Event Rate: -15.3% vs -3%
p-value: p=<0.01
Elevating a bed's backrest to 50° induces a significantly greater temporary blood pressure drop than a 30° elevation, whereas adding a 20° headrest elevation to a 30° backrest elevation does not exacerbate blood pressure fluctuations.
Backrest elevation may warrant BP monitoring to mitigate transient hypotension; extends RCT evidence on positional orthostatic effects in adults.
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Murata et al. (2019) conducted an RCT in Healthy volunteers (n=10). Backrest elevation of 30° vs. Backrest elevation of 0° was evaluated on Temporary blood pressure reduction (mmHg) (p=<0.01). Backrest elevation of 30 degrees caused a significantly greater temporary reduction in blood pressure compared to 0 degrees (-15.3 mmHg vs -3.0 mmHg, p<0.01), whereas headrest elevation had no significant effect.
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