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System for measuring the mean arterial pressure

A technology of mean arterial pressure and volume pulse wave, applied in the field of anesthesia, which can solve problems such as measurement or estimation of dicrotic wave measurement

Pending Publication Date: 2020-08-21
ASSISTANCE PUBLIQUE HOPITAUX DE PARIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the document does not mention that dicrotic wave measurements can be used to measure or estimate mean arterial pressure

Method used

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  • System for measuring the mean arterial pressure
  • System for measuring the mean arterial pressure
  • System for measuring the mean arterial pressure

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0146] Example 1. Determination of parameters that can be used for continuous arterial pressure measurement

[0147] Therefore, in cardiology, changes in pulse waves can be measured non-invasively by plethysmography. This produces a curve (graph) representing the excess volume due to systole expulsion.

[0148] The perfusion index (PI) reflects the locally measured blood flow in part of the pulsatile arterial flow, ie systolic ejection volume. The perfusion index represents the area under the above curve. In the case of photoplethysmography, a value representing arterial oxygen saturation SpO is also obtained 2 .

[0149] The curve represents the waveform of the pulse wave and shows the dicrotic wave at the outlet of the heart during organ systole (second peak (optionally two peaks), high point or turning point in decay).

[0150] This plethysmographic signal can be used for continuous mean arterial pressure measurement.

[0151] Therefore, a change in the peak size (of...

example 2

[0176] Example 2. Calibration and continuous estimation of mean arterial pressure (PAM / MAP)

[0177] Calibration requires at least one of the following parameter values ​​(Vp)

[0178] - the height of the dicrotic wave

[0179] - the logarithm (natural logarithm or decimal logarithm) value of the reciprocal of the PI perfusion index (ln(1 / PI+1)). Add 1 to the reciprocal of the perfusion index to avoid negative results from taking the logarithm of values ​​less than 1

[0180] - the time value from pulse wave's foot to dicro wave, and

[0181] - Time value from the foot of the pulse wave to the maximum value of the pulse wave

[0182] - the ratio "height of dicrotic wave / height of pulse wave" and / or "height of dicrotic wave / height of diastolic wave".

[0183] - Duration of the total pulse wave

[0184] These values ​​can be obtained beat by beat (ie for each pulse wave). image 3 How these variables were measured is shown.

[0185] Calibration also requires a mean arte...

example 3

[0207] Example 3. Example in a real situation

[0208] These results are obtained based on the height of the dicrotic wave, similar results can be obtained by other parameters.

[0209] Studies performed in the neurosurgery operating room or interventional neuroradiology procedures. Patients received routine essential management for such interventions, including:

[0210] monitor

[0211] - Non-invasive hemodynamic arterial pressure monitoring by oscillometric method and continuous ECG monitoring

[0212] - Continuous monitoring of arterial oxygen saturation (SpO2) by photoplethysmography, as well as monitoring of exhaled CO2.

[0213] - Bispectral (BIS) monitoring of depth of anesthesia

[0214]- Induction and maintenance of intravenous general anesthesia (anesthésie générale selon une method intraveineuseà objectif de concentration (AIVOC)) including propofol and remifentanil with atracurium besylate prior to endotracheal intubation Arrow poisoned.

[0215] - All m...

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Abstract

The present invention relates in particular to the field of anesthesia and to a method for real-time evaluation of the mean arterial pressure of a patient from plethysmography measurements.

Description

technical field [0001] The present invention relates to the field of anesthesia, and more particularly to a new program and a new algorithm that can be used in particular for monitoring the general condition of a patient during anesthesia, in particular during induction of anesthesia. Background technique [0002] The role of the anesthesia resuscitator is to observe and ensure the control of the patient's major vital functions during general anesthesia (during the entire period of anesthesia, especially during the induction period, when large doses of anesthetic are used to induce loss of consciousness, often resulting in hypoarterial pressure critical period. [0003] This hypotension results from an interaction between the direct peripheral vasodilation effects of hypnotic and morphine-like drugs and the central narcotic effects of arterial pressure control centers. In fact, arterial pressure (pression artérielle, PA) is a finely regulated physiological parameter, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/021A61B5/00A61B5/024A61B5/1455A61B5/022
CPCA61B5/0071A61B5/02116A61B5/02225A61B5/02416A61B5/14556A61B2505/05A61B2560/0223A61B5/14552A61B5/4821A61B5/6816A61B5/6826A61B5/7225A61B5/725A61B5/7278
Inventor F·瓦雷J·若阿基姆M·库特罗J·马特奥E·加亚A·迈巴扎
Owner ASSISTANCE PUBLIQUE HOPITAUX DE PARIS