Method and device for ascertaining a blood pressure curve
First Claim
1. A method for ascertaining the time-dependent curve of the blood pressure including the following steps:
- noninvasive detection of time-dependent and volume-dependent blood flow values, in the form of photoplethysmographic values P(t), in a section of tissue with blood circulation by means of a photoplethysmographically functioning sensor;
transformation of the photoplethysmographic values P(t) into blood pressure values B(t) through the use of the following transformation formula by means of a data processing unit;
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Abstract
The invention relates to a method and a device for ascertaining a time-dependent blood pressure curve. Time- and volume-dependent blood flow values are detected in a noninvasive manner in a tissue section with a good blood flow as photoplethysmography values P(t) using a photoplethysmography sensor. A data processing unit transforms the photoplethysmography values P(t) into blood pressure values B(t) by carrying out a transformation rule. An output and storage unit at least temporarily stores the transformed blood pressure values B(t) as time-dependent blood pressure values and transfers said values to an external or internal display and/or storage unit arranged downstream.
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Citations
11 Claims
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1. A method for ascertaining the time-dependent curve of the blood pressure including the following steps:
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noninvasive detection of time-dependent and volume-dependent blood flow values, in the form of photoplethysmographic values P(t), in a section of tissue with blood circulation by means of a photoplethysmographically functioning sensor; transformation of the photoplethysmographic values P(t) into blood pressure values B(t) through the use of the following transformation formula by means of a data processing unit; - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for ascertaining the time-dependent curve of the blood pressure, including:
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a photoplethysmographic sensor, which noninvasively detects time-dependent and volume-dependent blood flow values, in the form of photoplethysmographic values P(t), in a section of tissue with blood circulation; a data processing unit, which transforms the photoplethysmographic values P(t) into blood pressure values B(t), by executing the following transformation instruction; - View Dependent Claims (9, 10, 11)
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Specification