Non-invasive continuous finger blood pressure measurement (Finapres) closely followed intra-arterial pressure during head-up tilt, with a mean systolic bias of +0.7 mmHg and diastolic of +5.4 mmHg.
Observational (n=8)
Does non-invasive continuous finger blood pressure measurement (Finapres) accurately reflect intra-arterial pressure during prolonged head-up tilt in patients with malignant vasovagal syncope?
Non-invasive continuous finger blood pressure measurement (Finapres) demonstrates acceptable precision and closely tracks intra-arterial pressure changes during diagnostic tilt testing.
Mean Difference: 0.7
Simultaneous intra-radial and non-invasive (Finapres, Ohmeda) blood pressures were compared during prolonged head-up tilt, in eight patients (mean age 49 years) with malignant vasovagal syncope. Twelve tilts were performed, of which eight resulted in vasovagal syncope. The mean bias (difference between Finapres and intra-arterial pressures) for systolic pressure was +0.7 mmHg (standard deviation 11.3 mmHg) and for diastolic pressure was +5.4 mmHg (standard deviation 7 mmHg). The within-tilt precision (standard deviation of the bias) of the non-invasive measurements varied between 2.9-12.4 mmHg (median 4.5 mmHg) for systolic comparisons, and 1.6-8.4 mmHg (median 4.4 mmHg) for diastolic comparisons. In all but one tilt highly significant positive increases in both systolic (median 7.1 mmHg) and diastolic bias (median 8.1 mmHg) occurred on tilt with respect to resting pre-tilt levels. Independent of the absolute level of agreement, the non-invasive measurements followed changes in intra-arterial pressure closely, with 89% of beat-to-beat changes in systolic pressure, and 95% of beat-to-beat changes in diastolic pressure followed to within +/- 2 mmHg. This study suggests that the Finapres is well suited for use during diagnostic tilt testing, demonstrating an acceptable within-tilt precision and closely following pressure changes during vasovagal syncope.
PETERSEN et al. (1995) conducted an observational in Malignant vasovagal syncope (n=8). Non-invasive continuous finger blood pressure measurement (Finapres) vs. Intra-arterial pressure measurement was evaluated on Mean bias (difference between Finapres and intra-arterial pressures) for systolic and diastolic pressure (Mean bias +0.7 mmHg (systolic) and +5.4 mmHg (diastolic)). Non-invasive continuous finger blood pressure measurement (Finapres) closely followed intra-arterial pressure during head-up tilt, with a mean systolic bias of +0.7 mmHg and diastolic of +5.4 mmHg.