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Inflating one's own cuff does not increase self-recorded blood pressure
D P Veerman1, G A van Montfrans, J M Karemaker
1Department of Internal Medicine, University of Amsterdam, The Netherlands.
Insights
Self-inflating a blood pressure cuff causes a temporary, minor increase in systolic pressure. However, blood pressure readings remain valid for self-monitoring when guidelines are followed.
Area of Science:
- Cardiovascular Physiology
- Medical Device Technology
- Hypertension Management
Background:
- Accurate blood pressure measurement is crucial for diagnosing and managing hypertension.
- Self-monitoring of blood pressure (SMBP) is increasingly common, necessitating validated techniques.
- Concerns exist regarding potential artifacts introduced by the muscular effort of cuff self-inflation.
Purpose of the Study:
- To investigate the impact of muscular activity during blood pressure cuff self-inflation on subsequent blood pressure measurements.
- To determine the validity of self-recorded blood pressure measurements.
- To assess transient blood pressure changes induced by manual cuff inflation.
Main Methods:
- Continuous finger blood pressure monitoring using the Finapres device.
- Simultaneous recording of Korotkoff sounds during cuff inflation and deflation.
- Manual inflation of the blood pressure cuff to 200 mmHg within 5 seconds by participants.
- Controlled deflation rate of 2-3 mmHg/s by the investigator.
Main Results:
- Systolic blood pressure showed a transient peak increase of approximately 12-13 mmHg at the onset of cuff inflation.
- Both systolic and diastolic pressures returned to baseline levels within 5 seconds after deflation began.
- No significant long-term effects on blood pressure were observed due to the inflation process itself.
Conclusions:
- The muscular effort involved in self-inflating a blood pressure cuff causes a temporary and clinically insignificant elevation in blood pressure.
- Self-recorded blood pressure measurements are valid when standard inflation and deflation guidelines are adhered to.
- SMBP using manual cuff inflation is a reliable method for home blood pressure monitoring.
Abstract:
To determine whether the muscular activity required to inflate a blood pressure cuff for self-recording influences the blood pressure at the instant of the subsequent measurement, finger blood pressure was recorded continuously during cuff inflation. Ten normotensive and seven untreated hypertensive subjects used their dominant hands to inflate, in 5 s, an occluding cuff on the same arm up to 200 mmHg. Blood pressure in the middle finger of the other arm was measured continuously by the Finapres device. Korotkoff sounds were determined by a microphone in the arm cuff, and the speed of deflation was kept constant by the investigator at 2-3 mmHg/s. Systolic pressure rose at the onset of inflation, with an average peak of 13 +/- 6 (s.d.) and 12 +/- 8 mmHg above baseline in the normotensive and hypertensive subjects, respectively. Five seconds after the onset of deflation both systolic and diastolic pressures in both groups had returned to baseline levels. Thus, self-inflation of a blood pressure cuff allows a valid measurement of blood pressure provided the recommended guidelines are strictly followed.