Noninvasive Measurement of the Volume Elastic Modulus in Finger Arteries Using Photoelectric Plethysmography

Shimazu, Hideaki; Yamakoshi, Ken-ichi; Kamiya, Akira

doi:10.1109/tbme.1986.325906

Cited by 38 publications

(22 citation statements)

References 6 publications

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“…Furthermore, ΔV b /V b is referred to as double‐normalized pulse volume (DNPV) in (3). For further details of the derivation of these measures, see our previous reports (Sawada et al., 2001; Shimazu, Yamakoshi & Kamiya, 1986; Tanaka et al., 2000).…”

Section: Methodsmentioning

confidence: 99%

Evaluation of pre‐operative anxiety and propofol‐induced sedation using newly proposed indices of finger vascular tone

et al. 2002

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This study examined estimates of finger vascular tone, obtained from photoplethysmography. Normalized and double-normalized pulse volume (NPV and DNPV), blood volume (BV), and pulse volume (PV) were obtained in 2 male and 7 female middle-aged patients at an outpatient office 1-3 days before an operation and in the operating room before and after anesthesia by propofol. There was a preoperative decrease in NPV, and the propofol injection yielded a moderate increase in BV. The latter seemed to contribute to a decrease in DNPV. A partial correlation controlling for body mass index was observed between the change in NPV and the dose of propofol; a larger reduction in NPV before anesthesia compared with the control condition was accompanied by the need for a greater infusion of propofol for sedation. In conclusion, among the measures examined, NPV appears to be the best indicator of heightened arteriolar vascular tone.

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Section: Methodsmentioning

confidence: 99%

Evaluation of pre‐operative anxiety and propofol‐induced sedation using newly proposed indices of finger vascular tone

et al. 2002

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“…As one example, a linear dependence of changes in absorbance [lns t as] on concentrations of oxygenated or deoxygenated haemoglobin has been demonstrated in rat brain in situ (Hazeki and Tamura 1988). As another, a volume change ratio in the arterial bed in the ®nger has been determined by an application of Lambert-Beer's law, and subsequently a noninvasive measurement of the volume elastic modulus has been successfully carried out (Shimazu et al 1986). In the case of a lightscattering system such as the ®ngertip, even in an ischaemic circulatory state (i.e.…”

Section: Discussionmentioning

confidence: 99%

“…Here, I and I t are the intensities of transmitted light detected photoplethysmographically from the ®ngertip in a normal (I, tissue plus blood) and an ischaemic circulatory state (s t , tissue only), Ds denotes the pulsatile component of the transmitted light. For further details of the derivation of DNPV, see Appendix and the works of Yamakoshi and his colleagues (Sawada et al 1998;Shimazu et al 1986). A transmittance-type FPG device was attached to the left index ®nger.…”

Section: Physiological Measurements and Instrumentsmentioning

confidence: 99%

Beat-by-beat double-normalized pulse volume derived photoplethysmographically as a new quantitative index of finger vascular tone in humans

2000

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Near-infrared finger photoplethysmograms were recorded and double-normalized pulse volumes (DNPV = DeltaV(b)/V(b); V(b) = total blood volume in the fingertip, DeltaV(b) = pulsatile component of V(b)) were calculated in ten subjects during, immersion of the contralateral hand in water at three different temperatures (44 degrees C, 22 degrees C, 11 degrees C). The DNPV from the left finger was compared beat-by-beat with cutaneous vascular resistance (CVR) derived by dividing mean blood pressure of the left third finger by cutaneous blood flow of the left fourth finger. The correlations overall at the three temperatures between log DNPV(LF) and log CVR(LF) (LF, low frequency component of DNPV and CVR) ranged from -0.89 to -0.96 among the subjects. After adjusting for a maximal extension of the vascular wall (DNPV(max)), the correlations became stronger. It was concluded that DNPV was a reliable and valid indicator of vascular tone in the finger.

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“…Briefly, measurements are taken from a single finger, using photo-plethysmography for the detection of peripheral pulse volume signals. The instrument then calculates: 1) systolic, mean and diastolic blood pressure (SBP, MBP and DBP, respectively) using the volume-oscillometric method [13] - [15]; 2) pulse pressure (PP), which is a strong predictor of increased large artery stiffness and high cardiovascular risk [16]; 3) heart rate (HR); 4) normalized pulse volume (NPV), which reflects !-adrenalin-mediated sympathetic control of the finger arteriolar vessels [17], [18]; and 5) the finger-artery elasticity index (FEI) derived from a simple descriptive model of the exponential pressure-volume function for the finger vascular bed [17], [19], modified by the volume elastic modulus [20]. These cardiovascular indices are simultaneously obtained using the present instrument and, whilst each is of interest and significant in itself, the adoption of a comprehensive method for handling the combined datasets is necessary if they are to be of practical use.…”

Section: Introductionmentioning

confidence: 99%

Potential for Health Screening Using Long-Term Cardiovascular Parameters Measured by Finger Volume-Oscillometry: Pilot Comparative Evaluation in Regular and Sleep-Deprived Activities

Yamakoshi

Matsumura

Rolfe³

et al. 2014

IEEE J. Biomed. Health Inform.

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Abstract-We explored the potential of health screening based on the long-term measurement of cardiovascular parameters using the finger volume-oscillometric technique. An automated instrument made simultaneous measurements of key cardiovascular parameters, including blood pressure, pulse pressure, heart rate, normalized pulse volume as an index of α-adrenalin-mediated sympathetic activity, and finger arterial elasticity. These were derived from finger photoplethysmographic signals during application of cuff pressure. To assess the feasibility of achieving a screening function, measurements were made in ten healthy volunteers during 10 days of day-to-day living (normal condition), and carried out several times at a fixed time every day. During successive 10-day measurements, a 30-hour period of total sleep deprivation was introduced as a physiological challenge (abnormal condition). A linear discriminant analysis of the data was conducted to determine whether these two conditions could be discriminated. Periodic data collection was performed rapidly and easily, and the %-correct classifications of normal and abnormal conditions T. Yamakoshi is with the School of Mechanical Engineering, College of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192 Japan (e-mail: takey@staff.kanazawa-u.ac.jp).K. Matsumura and K. Yamakoshi are with the School of Mechanical Engineering, College of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192 Japan (e-mail: kenta16moon @se.kanazawa-u.ac.jp; kyama@staff.kanazawa-u.ac.jp).P. Rolfe is with the Oxford BioHorizons Ltd., 31-33 Albion Place, Maidstone ME14 5DZ UK and the Department of Automatic Measurement and Control, Harbin Institute of Technology, 92 West Dazhi Street, Nan Gang District, Harbin 150001 China (e-mail: PeterRolfe@aol.com).S. Hanaki and J. Lee are with the Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192 Japan (e-mail: shanaki@gmail.com; jihyoung@stu.kanazawa-u.ac. jp).A. Ikarashi is with the Department of Medical Engineering, Aino University, 4-5-4 Higashioota, Ibaraki-shi, Osaka 567-0012 Japan (e-mail: a-ikarashi@me-u.aino.ac.jp).were 78.2% and 77.5%, respectively. This ability of the method to discriminate between regular and sleep-deprived activities demonstrates its potential for healthcare screening during day-to-day living. Further investigations using larger age and gender groups of subjects including patients with cardiovascular diseases under real-life situations are required.Index Terms-blood pressure, finger-artery elasticity index, pulse pressure, heart rate, normalized pulse volume, healthcare.

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Noninvasive Measurement of the Volume Elastic Modulus in Finger Arteries Using Photoelectric Plethysmography

Cited by 38 publications

References 6 publications

Evaluation of pre‐operative anxiety and propofol‐induced sedation using newly proposed indices of finger vascular tone

Evaluation of pre‐operative anxiety and propofol‐induced sedation using newly proposed indices of finger vascular tone

Beat-by-beat double-normalized pulse volume derived photoplethysmographically as a new quantitative index of finger vascular tone in humans

Potential for Health Screening Using Long-Term Cardiovascular Parameters Measured by Finger Volume-Oscillometry: Pilot Comparative Evaluation in Regular and Sleep-Deprived Activities

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