Device and method for the continuous non-invasive measurement of blood pressure
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Abstract
The invention relates to a method and a device for the continuous non-invasive measurement of blood pressure, according to the principle of the relaxed arterial wall, said device comprising at least one first pressure cuff (1) and one second pressure cuff (1′) of a comparable or identical size. Said cuffs respectively comprise an inflatable pressure measuring chamber (4, 4′) and can be applied to a first and a second body part or body region (3, 3′) respectively containing an artery (2, 2′) of a comparable or identical size. The first pressure cuff (1) has a first plethysmographic sensor device (5) connected to a regulating and control device (6) used to regulate the pressure in the first pressure measuring chamber (4) by means of the measuring signal of the plethysmographic sensor device (5). The pressure measuring chamber (4) is connected to at least one pressure sensor (7) in order to obtain a pressure measuring signal. According to the invention, the pressure measuring chamber of the second pressure cuff (1′) is embodied as a reference pressure chamber (4′) that can be regulated at the same time as the pressure measuring chamber (4) and independently therefrom. The pressure measuring chamber (4) of the first pressure cuff (1) and the reference pressure chamber (4′) of the second pressure cuff (1′) both have separate inlet valves (10, 10′) and outlet valves (11, 11′), and the pressure in the reference pressure chamber (4′) can be regulated by means of the regulating and control device (6) according to a pre-determinable pressure function.
32 Citations
40 Claims
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1-26. -26. (canceled)
- 27. A method for the continuous, non-invasive measurement of blood pressure based on the principle of the unloaded arterial wall, where on at least one first and one second body part or body region, each containing an artery of identical or comparable size, there is positioned a first and a second pressure cuff of identical or comparable size with a first and a second inflatable pressure measuring chamber, the pressure in the first pressure measuring chamber being controlled in dependence of the measurement signal of a plethysmographic sensor device in such a way that the amplitude of the plethysmographic measurement signal is minimized, and a pressure measuring signal being obtained from the first pressure measurement chamber, wherein the second pressure measuring chamber is operated as a reference pressure chamber independently of the first pressure measuring chamber, and wherein the pressure in the reference pressure chamber is controlled in accordance with a preselectable pressure function, a reference signal being obtained simultaneously with the pressure measuring signal, and the reference signal is used in the interpretation of the pressure measuring signal.
- 35. A device for the continuous, non-invasive measurement of blood pressure based on the principle of the unloaded arterial wall, with at least one first and one second pressure cuff of identical or comparable size, which are attached on at least one first and one second body part or body region containing an artery of identical or comparable size, each pressure cuff having an inflatable pressure measuring chamber, the first pressure cuff being provided with a first plethysmographic sensor device connected to a controlling and adjusting device, which controls the pressure in the first pressure measuring chamber using the measuring signal of the plethysmographic sensor device, and where the pressure measuring chamber is connected to a pressure sensor to obtain a pressure measuring signal, wherein the pressure measuring chamber of the second pressure cuff is configured as a reference pressure chamber, which is controlled simultaneously with and independently of the pressure measuring chamber of the first pressure cuff, and wherein the pressure measuring chamber of the first pressure cuff and the reference pressure chamber of the second pressure cuff each have separate inlet valves and outlet valves, with the pressure in the reference pressure chamber being controlled via the controlling and adjusting device in accordance with a preselectable pressure function.
Specification