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Apparatus, system and method for determining vital signs of a subject based on reflected and transmitted light

A technology of vital signs and equipment, applied in the direction of using light for diagnosis, application, medical science, etc., can solve problems such as low signal-to-noise ratio

Active Publication Date: 2021-10-08
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, long-range PPG devices typically achieve lower signal-to-noise ratios

Method used

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  • Apparatus, system and method for determining vital signs of a subject based on reflected and transmitted light
  • Apparatus, system and method for determining vital signs of a subject based on reflected and transmitted light
  • Apparatus, system and method for determining vital signs of a subject based on reflected and transmitted light

Examples

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Embodiment Construction

[0056] figure 1 A schematic diagram of an embodiment of a system 10 comprising a device 12 for obtaining vital signs of a subject 14 according to the invention is shown. The subject 14, in this example a patient, is lying in a bed 16 in a hospital or other healthcare facility, but could also be a newborn or premature baby, for example lying in an incubator, or at home or in a different environment people. Image frames of the subject 14 are captured by means of a camera (also called a detection unit or camera-based or remote PPG sensor) comprising a suitable photosensor. The camera forwards the recorded image frames to the processing unit of the device 12, where they are processed as explained in more detail below. Device 12 is also connected to interface 20 for displaying determined information and / or for providing an interface for medical personnel to change settings of device 12 and / or other elements of system 10 . Such interface 20 may comprise various displays, buttons,...

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Abstract

The present invention relates to devices, systems and methods for determining vital signs of a subject. To increase accuracy and reliability, the device comprises a detection unit (30) for contactless detection of light in at least two different wavelength ranges from a region of interest of an object, wherein the The detection unit (30) is configured to detect a first light portion in a first wavelength range from light reflected from the region of interest in response to illumination by a first light source (22), and is configured to respond to Detecting a second light portion in a second wavelength range from light transmitted through the region of interest upon illumination by a second light source (24), wherein the detection unit (30) is configured to respond to at least temporally simultaneous illumination to simultaneously detect the first light fraction and the second light fraction, and wherein the first wavelength range and the second wavelength range are different. A processing unit (32) is provided for deriving a photoplethysmographic PPG signal from the detected light for said at least two different wavelength ranges. An analysis unit (34) is provided for deriving a desired vital sign from said PPG signal for at least two different wavelength ranges.

Description

technical field [0001] The present invention relates to devices, systems and methods for determining vital signs of a subject, such as a human or animal. Furthermore, the present invention relates to a wearable light source device. Background technique [0002] A person's vital signs, such as heart rate (HR), respiration rate (RR) or arterial oxygen saturation, serve as indicators of the person's current state and as powerful predictors of serious medical events. For this reason, vital signs are widely monitored in inpatient and outpatient care facilities, at home, or in other health, leisure and fitness settings. [0003] One way of measuring vital signs is plethysmography. Plethysmography generally refers to the measurement of volume changes of an organ or body part, and in particular to the detection of volume changes due to cardiac-vascular pulse waves traveling through a subject's body with each heartbeat. [0004] Photoplethysmography (PPG) is an optical measurement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/00A61B5/024A61B5/0205A61B5/1455
CPCA61B5/6888A61B5/6889A61B5/6892A61B5/0059A61B5/0077A61B5/0205A61B5/02433A61B5/14551A61B5/6815A61B2503/045
Inventor I·O·基伦科
Owner KONINKLJIJKE PHILIPS NV
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