System and methods for respiratory measurements using breathing gas samples
US11154215B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2017 |
| Grant date | Oct 26, 2021 |
| Priority date | — |
| Expiry date | Oct 23, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/432
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
There is provided a method that includes receiving pulse-oximetry measurements (SpO2) of a patient's peripheral arterial blood oxygen saturation during a first time period, and receiving breathing samples of the patient. The method further includes determining, using breathing samples of the patient, oxygen partial pressure measurements (PAO2) and carbon dioxide partial pressure measurements (PACO2) from exhaled air of the patient during a steady-state breathing of the patient during the first time period. The method also includes determining an arterial oxygen partial pressure (PaCO2), an oxygen deficit (PAO2−PaO2) and a respiratory exchange ratio (RQ) of the patient using the pulse-oximetry measurements (SpO2), the oxygen partial pressure measurements (PAO2) and the carbon dioxide partial pressure measurements (PACO2), and generating one or more signals based on the determining of the arterial oxygen partial pressure (PaO2), the oxygen deficit (PAO2−PaO2) and the respiratory exchange ratio (RQ) of the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.