TECHNICAL NOTE: Continuous non‐invasive measurement of mean blood pressure in fingers by volume‐clamp and differential oscillometric method

Jagomägi, K.; Talts, J.; Raamat, Rein; Länsimies, Esko

doi:10.1111/j.1475-097x.1996.tb01020.x

Cited by 31 publications

(15 citation statements)

References 11 publications

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“…This can occur as a result of pulse wave re ection in the nger arterial system. During the speci c tests such as single deep breathing or the cold stress test, the oscillometric method-based nger mean blood pressure tended to be overestimated [15].…”

Section: Discussionmentioning

confidence: 99%

Digital envelope detector for blood pressure measurement using an oscillometric method

Lee

Kim

Yoon

2002

Journal of Medical Engineering & Technology

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Blood pressure measurement in the finger artery offers some advantages compared with that in the brachial artery. However, volume oscillometric signals obtained from finger artery measurement are often influenced by motion artefact due to respiration, speaking, involuntary or voluntary movement, etc. In this paper, we developed a digital envelope detector to detect the maximum oscillation criterion in blood pressure measurement for the first time. The digital envelope detector is robust to noise signals generated by motion artefact and filters out the carrier frequency efficiently. To verify the feasibility of our method, we measured blood pressure for eight subjects using our developed system. The results were compared with the auscultation method. In the case of using a digital envelope detector, we could reduce the mean difference error and standard deviation by 30-40%. Our proposed digital envelope detector is a useful tool to improve the accuracy of blood pressure measurement in finger artery.

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Section: Discussionmentioning

confidence: 99%

Digital envelope detector for blood pressure measurement using an oscillometric method

Lee

Kim

Yoon

2002

Journal of Medical Engineering & Technology

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“…Our earlier studies (Jagomägi et al. , 1996, 2001) have shown that the finger mean blood pressure changes at rest or during light physical exercise were similarly tracked by the two blood pressure monitors (Finapres and UT9201).…”

Section: Methodsmentioning

confidence: 97%

“…Beat‐to‐beat finger volumetric pulses were measured by the UT9201 physiograph. Being originally constructed for finger mean blood pressure measurement (Reeben & Epler, 1983; Jagomägi et al. , 1996, 2001; Raamat et al.…”

Section: Methodsmentioning

confidence: 99%

Recording of dynamic arterial compliance changes during hand elevation

Jagomägi

Raamat

Talts

et al. 2005

Clin Physio Funct Imaging

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Finger arterial compliance has been studied on the beat-to-beat basis by using the digital arterial pressure and volume waveforms and performing measurements at zero transmural pressure during arm elevation in 11 volunteers. Continuous non-invasive finger blood pressure was measured by applying the Finapres monitor and the finger volume pulses were recorded by the UT9201 physiograph by using the photoplethysmographic principle of registration. Estimation of the beat-to-beat finger arterial compliance is based on (i) the recorded volume and pressure wave amplitudes (Vpulse and Ppulse) and (ii) on the calculation of the slope of the pressure-volume relationship from the first derivatives dV/dt and dP/dt of the recorded volume and pressure pulses near the point of the maximum slope. The results of the study demonstrate that the applied two methods similarly (correlation coefficient r = 0.97) describe the changes of the beat-to-beat compliance during hand elevation test. At the same time the second estimate was 18% higher than the first one (P = 0.003).

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“…The last procedure was conditioned by difficulties in the synchronization of data series obtained by the two devices and has been proved in our previous studies [16,17].…”

Section: Signal Processing and Data Analysismentioning

confidence: 99%

Simultaneous application of differential servo-oscillometry and volume-clamp plethysmography for continuous non-invasive recording of the finger blood pressure response to a hand postural change

Raamat

Talts

Jagomägi

et al. 2006

Journal of Medical Engineering & Technology

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Continuous blood pressure recordings obtained by the volume-clamp method (Finapres 2300 BP monitor, Ohmeda, USA) were compared with measurements made by using the modified oscillometric method (UT9201 beat-to-beat monitor, University of Tartu, Estonia) in normal subjects during a hand postural change. Changes in the local blood pressure were induced in 11 healthy volunteers by passive elevation of the hand by 40 cm and lowering it again after one minute. We did not reveal a statistically significant difference between the group-averaged responses of the oscillometric finger mean blood pressure measurement device and those of Finapres during this test. The difference UT9201 minus Finapres equalled -1.3 +/- 3.1 mm Hg (p = 0.15). Blood pressure responses were similarly tracked by both beat-to-beat finger blood pressure monitors despite the considerable variability in the shape of the subjects' individual responses.

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TECHNICAL NOTE: Continuous non‐invasive measurement of mean blood pressure in fingers by volume‐clamp and differential oscillometric method

Cited by 31 publications

References 11 publications

Digital envelope detector for blood pressure measurement using an oscillometric method

Digital envelope detector for blood pressure measurement using an oscillometric method

Recording of dynamic arterial compliance changes during hand elevation

Simultaneous application of differential servo-oscillometry and volume-clamp plethysmography for continuous non-invasive recording of the finger blood pressure response to a hand postural change

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