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Device and method for regulating the pressure in an inflatable cuff of a blood pressure manometer

A blood pressure measurement device and a technology for controlling variables, applied in vascular assessment, cardiac catheterization, etc., can solve the problem of not detecting blood pressure fluctuations

Inactive Publication Date: 2006-11-22
CNSYST MEDIZINTECHN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is a compromise and has the following disadvantages: Blood pressure fluctuations are not detected during the search for optimized SP of the cycle

Method used

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  • Device and method for regulating the pressure in an inflatable cuff of a blood pressure manometer
  • Device and method for regulating the pressure in an inflatable cuff of a blood pressure manometer
  • Device and method for regulating the pressure in an inflatable cuff of a blood pressure manometer

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Embodiment Construction

[0030] figure 1A device for controlling the pressure in an inflatable finger cuff of a blood pressure measuring device, which is not further shown here, is shown. The control system comprises a first inner control loop 1 which receives a target signal SW from a second outer control loop 2 . The inner control loop 1 comprises a differential amplifier 10 (preferably an operational amplifier), a proportional valve 3 receiving pressure from a pressure source such as a pump 4, a pressure chamber 5 connected to the cuff 6, and a pressure chamber 5 or cuff The pressure generated in 6 is transformed into the pressure sensor 7 which is proportional to the electrical signal BP of the cuff pressure. This electrical signal BP, representative of the pressure in the arteries within the body extremity E, is fed to a differential amplifier 10, thereby closing the first inner control loop. The differential amplifier 10 regulates its output voltage AS in such a way that the voltage between it...

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Abstract

The invention relates to a method and a device for regulating the pressure in at least one inflatable cuff, preferably a finger cuff (6), of a blood pressure manometer comprising a plethysmographic sensor device (8, 9) for detecting a plethysmographic signal PG and a pressure sensor (7) for detecting a cuff pressure signal BP. According to the invention, two control loops (1, 2) acting on a differential amplifier (10) are used to independently regulate different operating parameters, the first, inner control loop (1) using the cuff pressure signal BP as the first regulating variable, and the second, outer control loop (2) comprising a regulating device (12), preferably a PID regulator, which generates a nominal value SW as a second regulating variable from the plethysmographic signal PG. The differential amplifier (10) is connected, on the output side, to at least one valve connected to a pressure source (4), preferably a proportional valve (3; 25, 27), for regulating the pressure in the cuff (6). Additional outer control loops (16 to 21) can be used to respectively set a parameter of the device to a determined nominal value.

Description

technical field [0001] The present invention relates to a device and method for controlling the pressure in at least one inflatable cuff, preferably a finger cuff, of a blood pressure measuring device provided with a plethysmographic sensing device in which a plethysmographic signal PG and a cuff are obtained. Pressure signal BP. Background technique [0002] Continuous monitoring of intra-arterial blood pressure in a non-invasive manner has been of interest to scientists and researchers for many years. As early as 1942, R. Wagner in Munich proposed a mechanical system designed to measure the arterial pressure on the radial side of the artery on the basis of the so-called "vascular unloading technique", also known as the relaxed arterial wall (Wagner R. "Methocdik und Ergebnisse fortlaufender Blutdruckschreibung am Menschen", Leipzig, Georg Thieme Verlag, 1942; Wagner R. et al. "Vereinfachtes Verfahren zur fortlaufenden Aufschrift des Blutdruckesbeim Menschen", Zschr. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0225A61B5/022
CPCA61B5/02255
Inventor J·福汀R·格鲁伦伯格A·哈克尔F·斯克拉博
Owner CNSYST MEDIZINTECHN
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