POSTURAL CHANGES IN THE CIRCULATION OF SURGICAL PATIENTS AS STUDIED BY A NEW METHOD FOR RECORDING THE ARTERIAL BLOOD PRESSURE AND PRESSURE PULSE

In this paper, we proposed an effective method for detecting fiducial points in arterial blood pressure pulses. An arterial blood pressure pulse normally consists of onset, systolic peak and dicrotic notch. Detection of fiducial points in blood pressure pulses is a critical task and has many potential applications. The proposed method employs empirical wavelet transform for locating the systolic peak and onset of blood pressure pulse. The proposed method first estimates the fundamental frequency of blood pressure pulse using empirical wavelet transform and utilizes the combination of the blood pressure pulse and the estimated frequency for locating onset and systolic peak. For dicrotic notch detection, it utilizes the first-order difference of blood pressure pulse. The algorithm was validated on various open-source databases and was tested on a data set containing 12,230 beats. Two benchmark parameters such as sensitivity and positive predictivity were used for the performance evaluation. The comparison results for accuracy of the detection of systolic peak, onset and dicrotic notch are reported. The proposed method attained a sensitivity and positive predictivity of 99.95% and 99.97%, respectively, for systolic peaks. For onsets, it attained a sensitivity and predictivity of 99.88% and 99.92%, respectively. For dicrotic notches, a sensitivity and positive predictivity of 98.98% and 98.81% were achieved, respectively.

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A new method for continuous non-invasive monitoring of mean arterial blood pressure

European Journal of Anaesthesiology ◽

10.1097/00003643-200100001-00111 ◽

2001 ◽

Vol 18 (Supplement 21) ◽

pp. 31-32

Author(s):

I. Störmer ◽

F. Baisch ◽

J.-L. Romé ◽

C. Hesse ◽

W. Schlack

Keyword(s):

Blood Pressure ◽

Arterial Blood Pressure ◽

Mean Arterial Blood Pressure ◽

New Method ◽

Invasive Monitoring ◽

Non Invasive ◽

Arterial Blood

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A new method of measuring arterial blood pressure on the Rat tail

Japanese Heart Journal ◽

10.1536/ihj.22.462 ◽

1981 ◽

Vol 22 (3) ◽

pp. 462-462

Author(s):

Motoharu Hasegawa ◽

Kokichi Takeuchi ◽

Takeshi Kawasaki ◽

Hiroyuki Ito ◽

Kozo Okamoto ◽

...

Keyword(s):

Blood Pressure ◽

Arterial Blood Pressure ◽

New Method ◽

Arterial Blood ◽

Rat Tail

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A new method of measuring arterial blood pressure on the Rat tail II

Japanese Heart Journal ◽

10.1536/ihj.23.417 ◽

1982 ◽

Vol 23 (3) ◽

pp. 417-417

Author(s):

Motoharu Hasegawa ◽

Kokichi Takeuchi ◽

Takeshi Kawasaki ◽

Hiroyuki Ito ◽

Kozo Okamoto ◽

...

Keyword(s):

Blood Pressure ◽

Arterial Blood Pressure ◽

New Method ◽

Arterial Blood ◽

Rat Tail

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EFFECT OF POSTURAL CHANGES ON ARTERIAL BLOOD PRESSURE AND HEART RATE IN HEALTHY, OLDER ADULTS

Journal of Cardiopulmonary Rehabilitation ◽

10.1097/00008483-198810000-00033 ◽

1988 ◽

Vol 8 (10) ◽

pp. 399

Author(s):

Sharon Stephen ◽

Ruth Gregersen

Keyword(s):

Blood Pressure ◽

Older Adults ◽

Heart Rate ◽

Arterial Blood Pressure ◽

Healthy Older Adults ◽

Arterial Blood ◽

Postural Changes

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Relationship between Venous and Arterial Haemodynamics during Postural Changes in Venous Insufficiency

Phlebology The Journal of Venous Disease ◽

10.1177/026835559400900208 ◽

1994 ◽

Vol 9 (2) ◽

pp. 77-82 ◽

Cited By ~ 3

Author(s):

D. Duprez ◽

M. De Buyzere ◽

C. Randon ◽

M. Dad ◽

D. L. Clement

Keyword(s):

Blood Pressure ◽

Cardiac Output ◽

Arterial Blood Pressure ◽

Vascular Resistance ◽

Venous Insufficiency ◽

Venous Pressure ◽

Lower Limbs ◽

Peripheral Vascular ◽

Arterial Blood ◽

Postural Changes

Objective: To study the changes in central haemodynamics and the relationship between arterial blood pressure and the venous dynamics of the lower limbs in patients with venous insufficiency. Design: Prospective haemodynamic study during postural changes in 14 patients with venous insufficiency with no other concomitant cardiovascular disease or disturbances in autonomic nervous system. Setting: Department of Cardiology and Angiology, University Hospital, Gent, Belgium. Patients: Fourteen patients with venous valve insufficiency in the lower limbs. Interventions: Measurements of arterial blood pressure, heart rate, stroke volume and cardiac output were performed in the supine position after 30 min rest and 5, 15 and 30 min after standing and during the recovery. Venous pressure at the ankle and calf circumference were also measured. Main outcome measures: Changes in cardiac output and total peripheral vascular resistance in order to maintain blood pressure during postural changes. Results: Arterial blood pressure was maintained constant owing to an increase in total peripheral vascular resistance despite a decrease in cardiac output. Venous pressure is also related to arterial blood pressure. Conclusions: The arterial and venous systems, even in venous insufficiency, are integrated to maintain blood pressure constant during postural changes.

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A New Method to estimate Arterial Blood Pressure using Photoplethysmographic Signal

2006 International Conference of the IEEE Engineering in Medicine and Biology Society ◽

10.1109/iembs.2006.4398493 ◽

2006 ◽

Author(s):

In Cheol Jeong ◽

Jae Il Ko ◽

Sung Oh Hwang ◽

Hyung Ro Yoon

Keyword(s):

Blood Pressure ◽

Arterial Blood Pressure ◽

New Method ◽

Arterial Blood

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Two-Tiered Response of Cardiorespiratory-Cerebrovascular Network to Orthostatic Challenge

Frontiers in Physiology ◽

10.3389/fphys.2021.622569 ◽

2021 ◽

Vol 12 ◽

Author(s):

Peter Mukli ◽

Zoltan Nagy ◽

Frigyes Samuel Racz ◽

Istvan Portoro ◽

Andras Hartmann ◽

...

Keyword(s):

Blood Pressure ◽

Arterial Blood Pressure ◽

Pearson Correlation ◽

Transcranial Doppler Sonography ◽

Cerebral Hemodynamics ◽

Orthostatic Stress ◽

Arterial Blood ◽

Postural Changes ◽

The Impact ◽

Homeostatic Mechanisms

Dynamic interdependencies within and between physiological systems and subsystems are key for homeostatic mechanisms to establish an optimal state of the organism. These interactions mediate regulatory responses elicited by various perturbations, such as the high-pressure baroreflex and cerebral autoregulation, alleviating the impact of orthostatic stress on cerebral hemodynamics and oxygenation. The aim of this study was to evaluate the responsiveness of the cardiorespiratory-cerebrovascular networks by capturing linear and nonlinear interdependencies to postural changes. Ten young healthy adults participated in our study. Non-invasive measurements of arterial blood pressure (from that cardiac cycle durations were derived), breath-to-breath interval, cerebral blood flow velocity (BFV, recorded by transcranial Doppler sonography), and cerebral hemodynamics (HbT, total hemoglobin content monitored by near-infrared spectroscopy) were performed for 30-min in resting state, followed by a 1-min stand-up and a 1-min sit-down period. During preprocessing, noise was filtered and the contribution of arterial blood pressure was regressed from BFV and HbT signals. Cardiorespiratory-cerebrovascular networks were reconstructed by computing pair-wise Pearson-correlation or mutual information between the resampled signals to capture their linear and/or nonlinear interdependencies, respectively. The interdependencies between cardiac, respiratory, and cerebrovascular dynamics showed a marked weakening after standing up persisting throughout the sit-down period, which could mainly be attributed to strikingly attenuated nonlinear coupling. To summarize, we found that postural changes induced topological changes in the cardiorespiratory-cerebrovascular network. The dissolution of nonlinear networks suggests that the complexity of key homeostatic mechanisms maintaining cerebral hemodynamics and oxygenation is indeed sensitive to physiological perturbations such as orthostatic stress.

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