The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 2025
Filed:
Dec. 14, 2018
Radiometer Basel Ag, Basel, CH;
Jean-Nöel Fehr, Brønshøj, DK;
Jean-Christophe Roulet, Brønshøj, DK;
Patrizia Weber, Brønshøj, DK;
Julien Finci, Brønshøj, DK;
Lukas Scherer, Brønshøj, DK;
RADIOMETER BASEL AG, Basel, CH;
Abstract
The present invention relates to an apparatus () apparatus for the detection of carbon dioxide. It is described to place () a part of a housing in contact with a skin area of a patient. the part of the housing and a gas measuring chamber within the housing are configured such that gases diffusing through the skin area of the patient enter the gas measuring chamber. radiation is emitted () from a radiation source within the housing, wherein at least some of the radiation emitted by the radiation source enters the gas measuring chamber. The radiation entering the gas measuring chamber has wavelengths that extend over an absorption band of carbon dioxide and has wavelengths that extend over a region other than the absorption band of carbon dioxide. A radiation filter is positioned () relative to the gas measuring chamber such that an interaction radiation path is defined between the radiation source through the gas measuring chamber to the radiation filter. A first radiation detector is positioned () relative to the radiation filter such that a first detection radiation path is defined that is in addition to the interaction radiation path, and a second radiation detector is positioned relative to the radiation filter such that a second detection radiation path is defined that is in addition to the interaction radiation path. The radiation filter is configured such that radiation in the first detection radiation path has a wavelength that extends over the absorption band of carbon dioxide and with an intensity of radiation that extends over the region other than the absorption band being significantly less than that in the interaction radiation path. The radiation filter is also configured such that radiation in the second detection radiation path has a wavelength that extends over the region other than the absorption band of carbon dioxide and with an intensity of radiation that extends over the absorption band being significantly less than that in the interaction radiation path. a partial pressure of carbon dioxide is determined () in the skin of the patient using a signal from the first radiation detector and a signal from the second radiation detector.