JP2019514503A5 - - Google Patents

Claims (14)

An assembly for use in a nasal cannula,
A flexible tube configured to transmit oxygen gas, and a light configured to transmit light having a frequency spectrum range including at least a frequency spectrum of light generated by combustion of the flexible tube during transmission of the oxygen gas. In an assembly having a fiber, the optical fiber is covered or coated with a substantially light-tight material to prevent light from entering the optical fiber unless it is damaged. To assemble.   The optical fiber includes a side end, which, unless damaged, is covered or coated with a substantially light-tight material to prevent light from entering the optical fiber. The assembly according to claim 1, wherein   The optical fiber includes a side end, the side end having a cap member on the end to prevent light from entering the optical fiber unless damaged. The assembly according to 2.   The assembly according to any one of claims 1 to 3, wherein the optical fiber extends in the longitudinal direction along with the flexible tube.   5. An assembly according to any one of claims 1 to 4, wherein the optical fibers are secured to the flexible tube in a manner that prevents relative movement between them. A nasal cannula comprising the assembly according to any one of claims 1 to 5,
A detector operably coupled to the optical fiber and configured to detect the light transmitted through the optical fiber; and, in response to a signal from the detector, through the nasal cannula. A system having a valve configured to actuate to interrupt the transmission of respiratory gas. Detecting the occurrence of combustion of the nasal cannula based on analysis of the detected light during operation of the oxygen gas and operably coupled to the detector; and Sending the signal to the valve to interrupt transmission of the respiratory gas through the nasal cannula upon occurrence.
The system of claim 6, further comprising a controller configured to: 8. The system of claim 7, further comprising an additional detector having a different wavelength range of sensitivity than the detector.
Wherein the controller, and combustion of the nasal cannula, to differentiate the spectrum of a standard light source or ordinary ambient light, so as to determine the ratio of the values obtained from the detector and the additional detector Further configured system.   9. The system of any one of claims 6-8, further comprising an alarm configured to alert a user that the oxygen gas transmission has been interrupted. In a method of detecting burning of a nasal cannula during transmission of oxygen gas,
Providing a nasal cannula having a flexible tube configured to carry oxygen gas;
Responsive to a signal, actuating a valve to interrupt the transmission of the oxygen gas through the nasal cannula;
Providing an optical fiber coupled to the nasal cannula and configured to transmit light having a frequency spectrum range that includes at least a frequency spectrum of light produced by combustion of the nasal cannula during transmission of the oxygen gas. Providing the optical fiber, wherein the optical fiber is covered or coated with a material that is substantially light-tight to prevent light from entering the optical fiber unless it is damaged, and Detecting light transmitted through the optical fiber using a detector operably coupled to the optical fiber;
And the signal is a signal from the detector. Detecting the occurrence of combustion of the nasal cannula based on analysis of detected light during transmission of the oxygen gas using a controller operably coupled to the detector; and 11. The method of claim 10, further comprising sending a signal to the valve to interrupt transmission of the oxygen gas through the nasal cannula based on the generated occurrence.   12. The method of claim 10 or 11, wherein the optical fiber is covered with a substantially light-tight material to prevent light from entering the optical fiber unless it is damaged.   13. The method according to any one of claims 10 to 12, further comprising the step of alerting a user that the transmission of the oxygen gas has been interrupted using an alarm.   14. The method of any of claims 10-13, wherein the optical fibers are fixedly attached to the nasal cannula in a manner that prevents relative movement between them.