Continuous non-invasive blood pressure monitoring using the Finapres device faithfully reproduced intra-arterial patterns, with median differences of at most 7 mmHg during the Valsalva manoeuvre.
Observational (n=15)
Does the Finapres continuous non-invasive blood pressure monitoring device reliably reproduce intra-arterial blood pressure measurements in hypertensive and normotensive subjects?
The Finapres device provides a reliable non-invasive alternative to intra-arterial blood pressure monitoring, faithfully reproducing pressure patterns during both rest and Valsalva maneuvers.
Because of the inherent risks of intra-arterial blood pressure monitoring a new non-invasive device, Finapres, which measures blood pressure continuously in the finger, was evaluated in 14 hypertensive and one normotensive subject. Brachial intra-arterial and finger pressures were compared during a control period and a subsequent Valsalva manoeuvre. Visually, blood pressures measured by Finapres faithfully reproduced the intra-arterial recordings in all subjects. From each pressure signal beat to beat systolic, diastolic, and mean blood pressure values and their differences were obtained and the time course of the response and its characteristic features were analysed. During the control period the Finapres measurements were lower than intra-arterial systolic, mean, and diastolic pressures (mean(SD) 1(9.6), 9(6.8), and 4(6.1) mmHg respectively). During the response to the Valsalva manoeuvre the brachial-finger pressure differences showed limited deviation from those during the control period; median differences were at most 6 mmHg occurring late during the intrathoracic strain period and 7 mmHg during the post-release blood pressure overshoot. In general, the Finapres device reproduced intra-arterial patterns faithfully. This device appears to offer a reliable alternative to intra-arterial blood pressure monitoring.
Imholz et al. (1988) conducted an observational in Hypertension (n=15). Finapres device vs. Brachial intra-arterial blood pressure monitoring was evaluated on Blood pressure measurement differences between Finapres and intra-arterial recordings. Continuous non-invasive blood pressure monitoring using the Finapres device faithfully reproduced intra-arterial patterns, with median differences of at most 7 mmHg during the Valsalva manoeuvre.