R. Raamat et al., Continuous mean arterial pressure measurement in the fingers: the influence of local arm cooling, MED BIO E C, 39(5), 2001, pp. 584-589
Two different methods were studied for non-invasive beat-to-beat finger mea
n arterial pressure (MAP) measurement in 14 healthy volunteers during local
arm cooling to 17 degreesC. Fingertip skin blood flow was recorded by a la
ser Doppler instrument. The difference between the oscillometric beat-to-be
at blood pressure measurement device (UT9201) and volume clamp monitor (Fin
apres) before cooling was -1.5 +/-1.1 mmHg, and, although statistically sig
nificant, (p <0.01), this difference cannot be considered clinically meanin
gful. The results obtained using the two devices during arm cooling showed
a systematic disagreement in the continuously recorded MAP. After a 30s per
iod of cooling, the group-averaged difference of UT9201 minus Finapres, cal
culated as change from the baseline, reached (mean SD) 8.8 +/-6.3 mmHg (sta
tistically significant, p <0.01).