Continuous, real-time, noninvasive monitor of blood pressure: Penaz methodology applied to the finger.
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The finger blood pressure monitor measures blood pressure continuously and noninvasively by means of a technique described by J. Peňaz, and algorithms determine the unloaded artery size approximately every minute and automatically correct for changes possibly induced by smooth muscle contraction or relaxation.Abstract:
The finger blood pressure monitor measures blood pressure continuously and noninvasively by means of a technique described by J. Penaz. The size of the artery is measured when its internal pressure (arterial pressure) equals the external pressure. (At this point, transmural pressure equals zero and the arterial wall is said to be "unloaded.") This unloaded condition is maintained by continuous, automatic adjustments of external pressure on the artery, adjustments that are made simultaneously with and parallel to intraarterial pressure variations. The external pressure then constantly equals internal pressure (arterial blood pressure) and is reported by the monitor as values for systolic, mean, and diastolic pressure. A finger cuff with a built-in light source and detector is used to measure finger artery size, and an inflatable bladder is used to apply the external pressure to the artery. The monitor is microprocessor based; algorithms determine the unloaded artery size approximately every minute and automatically correct for changes possibly induced by smooth muscle contraction or relaxation, and a high-speed electropneumatic servo control system enables automatic calibration and adjustment.read more
Citations
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Journal ArticleDOI
Noninvasive assessment of the digital volume pulse. Comparison with the peripheral pressure pulse.
Sandrine Millasseau,Franck G. Guigui,R P Kelly,Krishna Prasad,John R. Cockcroft,James M. Ritter,Philip Chowienczyk +6 more
TL;DR: The peripheral pressure pulse is related to the digital volume pulse by a transfer function, which is not influenced by effects of hypertension or NTG, and effects of NTG on the volume pulse and pressure pulse are likely to be determined by a similar mechanism.
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Methods of enhancing optical signals by mechanical manipulation in non-invasive testing
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References
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Book
Textbook of Medical Physiology
Arthur C. Guyton,John E. Hall +1 more
TL;DR: Textbook of medical physiology , Textbook ofmedical physiology , کتابخانه دیجیتال جندی شاپور اهواز
Journal ArticleDOI
Textbook of Medical Physiology
TL;DR: Textbook of medical physiology, Textbook of Medical Physiology, this paper, textbook of medicine, textbooks of medical science, text book of medical literature, textbook medical physiology.
Journal ArticleDOI
Effects of peripheral vasoconstriction on the measurement of blood pressure in a finger
K. H. Wesseling,Jos J. Settels,G. M. A. Van Der Hoeven,J. A. Nijboer,M. W. T. Butijn,J. C. Dorlas +5 more
TL;DR: Using noninvasive techniques only, the fall in mean pressure and the pulse amplification between brachial and finger arterial pressure were measured in six anaesthetised female subjects during surgery, finding that the difference tends to decrease with increasing constriction.
Book
Biological and Psychological Factors in Cardiovascular Disease
TL;DR: An opening address should ask the right questions, which the authors expect to answer during the coming years, and formu late hypotheses for falsification during the conference or in the near future.