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Apparatus for measuring optical or physiological parameters in scattering media featuring an optical contact detector

An optical contact, physiological parameter technology, applied in optical sensors, proximity sensors, diagnostic recording/measurement, etc., to solve problems such as incorrect oxygenation monitoring

Pending Publication Date: 2022-01-04
UNIV ZURICH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the monitoring of oxygenation will be incorrect

Method used

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  • Apparatus for measuring optical or physiological parameters in scattering media featuring an optical contact detector
  • Apparatus for measuring optical or physiological parameters in scattering media featuring an optical contact detector
  • Apparatus for measuring optical or physiological parameters in scattering media featuring an optical contact detector

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Embodiment Construction

[0132] figure 1 A device 1 according to the invention is shown, ie an oximeter designed to measure oxygenation in brain tissue for monitoring vital parameters of newborns. The device 1 is characterized by a bendable sensor head 6 at the distal end 19 carrying: a plurality of light sources 3 in the form of a linear array of LEDs, each emitting a respective measurement wavelength λmi; and a detection sensor in the form of a single photodiode device 4. Such as figure 2 It can be seen in the figure that the light source 3 and the detector 4 are arranged on the underside of the sensor head 6 at the contact area 9 . During the measurement, the contact surface 9 is in contact with the skin on the head of the newborn as image 3 shown.

[0133] Such as image 3 As can be seen in , the light source S1 is configured to emit two different measurement wavelengths λm1 and λm2 based on two different LEDs, and these wavelengths are detected by detectors D2 and D4 respectively after λm1...

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Abstract

For improving the safety of optical measurements performed with an apparatus (1) comprising a set of light sources (3) and detectors (4) controlled by an electronic unit (5) for measuring an optical or physiological parameter in a scattering medium (2), in particular human tissue (2), based on a set of measurement wavelengths, it is suggested that the apparatus (1) features at least one optical contact detector (7), for example in the form of a photodiode or a light sensitive end facet of an optical fiber or the like, for measuring a detection light quantity resulting from a detection wavelength, and wherein the apparatus (1) issues an alarm signal, in case the measured detection light quantity indicates a low optical coupling efficiency between the apparatus (1) and the medium (2) (figure 3).

Description

technical field [0001] The invention relates to a device for measuring at least one optical or physiological parameter in a scattering medium, in particular human tissue, comprising: at least one light source for emitting at least one measurement wavelength λm; at least one detector, for detecting the at least one measurement wavelength; and an electronic unit configured to measure the amount of measurement light emitted into the medium by the at least one measurement wavelength, wherein the measurement is based on the measurement from the at least one measurement wavelength The electrical signal read by the detector is used to calculate said at least one optical or physiological parameter. For example, such measured light quantities may be intensity, phase, or time-of-flight. [0002] The invention also relates to a method for evaluating the optical coupling efficiency between a contact area of ​​a device designed to measure at least one optical or physiological parameter in...

Claims

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Application Information

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IPC IPC(8): A61B5/1455
CPCA61B5/14553A61B5/14546A61B2503/04A61B5/6844A61B2562/0257A61B2562/0233A61B5/14552A61B5/6843G08B21/182
Inventor S·克莱泽D·奥斯托吉奇M·沃尔夫
Owner UNIV ZURICH