Method for the continuous non-invasive determination of the concentration of blood constituents

A technology of blood composition and concentration, applied in the fields of application, diagnosis by using light, medical science, etc., can solve the problems that cannot be estimated by combination

Inactive Publication Date: 2012-09-19
ENVERDIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This calculation method can only be applied to the transmitted or reflected part of the light, and cannot be used for the combined estimation of these parts

Method used

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  • Method for the continuous non-invasive determination of the concentration of blood constituents
  • Method for the continuous non-invasive determination of the concentration of blood constituents
  • Method for the continuous non-invasive determination of the concentration of blood constituents

Examples

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Embodiment Construction

[0105] according to figure 2 A suitable device for carrying out the method according to the invention comprises a radiation source 12 for emitting measuring radiation 14 towards a body part 16 to be examined. Preferably, the body part 16 to be examined is a human finger. Alternatively, however, measurements can also be taken on, for example, a human earlobe as well as other suitable body parts.

[0106] Furthermore, the device 10 comprises a first radiation receiver 18 which is arranged to receive radiation 20 reflected by the body part 16 to be examined. In the illustrated embodiment, the first radiation receiver is arranged in the first receiving element 28 . In the first receiving element 28 the radiation source 12 is also arranged.

[0107] The device 10 also comprises a second radiation receiver 22 arranged to receive radiation 24 transmitted through the body part 16 to be examined. In the illustrated embodiment, the second radiation receiver 22 is arranged in a seco...

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Abstract

The invention relates to a method for the non-invasive determination of the concentration of blood constituents, in which a radiation source (12) emits several measuring beams (14), each with a different wavelength. A first photo detector (18) receives the measured radiation (14) of each wavelength that is reflected by a body part (16) to be examined. A second photo detector (22) receives the measured radiation (24) of each wavelength that is transmitted by the body part (16) to be examined. The measured radiation (14) of each wavelength that is absorbed by the body part (16) to be examined is then determined on the basis of the measurement of the reflected radiation (20) by the first radiation receiver (18) and the measurement of the transmitted radiation (24) by the second radiation receiver (22). The concentration of the different constituents is calculated from the absorption of the measured radiation (14) that has been determined for each wavelength.

Description

technical field [0001] The invention relates to a method for the continuous and non-invasive determination of the concentration of a blood component. Background technique [0002] Human blood, for example, comprises up to 38.5% hemoglobin by dry matter weight (ie, drained of all unbound water) and 15% ca. wet matter (ie, under normal physiological conditions). And hemoglobin consists of the following components: [0003] -Unsaturated oxyhemoglobin (RHb) [0004] - Saturated oxyhemoglobin (O 2 Hb) [0005] - Carboxyhemoglobin (COHb) [0006] - Methemoglobin (MetHb). [0007] figure 1 Components of human blood are exemplified. For medical purposes, it is often necessary to determine the concentration of hemoglobin, especially the concentrations of the four hemoglobin derivatives mentioned above. However, the invention can also be used to determine the concentration of other components of blood. Thus, all the features described in connection with hemoglobin can also be...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): A61B5/00
CPCA61B5/0059A61B5/1455A61B5/14546
Inventor托马斯·西普纳米歇尔·阿尔特
OwnerENVERDIS