Sensor, gas analyzer and method for measuring concentration of at least one respiratory gas component
First Claim
1. A sensor for measuring a concentration of at least one respiratory gas component in a breathing gas, which concentration is varying during a breathing cycle having an inspiration phase, an expiration phase and a phase between the inspiration and expiration, the sensor comprising:
- at least one radiation source configured to emit radiation;
at least one radiation sensing detector configured to receive radiation and provide a signal indicative of the concentration of the at least one respiratory gas component;
an electronics board configured to receive and process the signal from the at least one radiation sensing detector to determine the concentration of the at least one respiratory gas component; and
an energy storage device configured to supply energy to the at least one radiation source;
wherein the electronics board is configured to choose from at least an operation mode providing sufficient energy supply to the at least one radiation source for subsequent concentration determination during a first time period, and a rest mode providing a reduced energy supply to the at least one radiation source during a second time period, wherein the operation mode is chosen when a derivative of a concentration of the at least one respiratory gas component approaches zero after a positive derivative peak, and the rest mode is chosen when the derivative decreases to a level below zero.
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Accused Products
Abstract
A sensor for measuring a concentration of a respiratory gas component is disclosed herein. The sensor comprises at least one radiation source configured to emit radiation and at least one radiation sensing detector configured to receive radiation and provide a signal indicative of the concentration of the gas component. The sensor further comprises an electronics board configured to receive and process the signal to determine the concentration, and an energy storage device configured to supply energy to the radiation source. The electronics board is configured to choose from among at least two different modes, one being an operation mode allowing sufficient energy supply to the radiation source, and another being a rest mode allowing reduced energy supply compared to the operation mode to limit radiation for saving energy within the breathing cycle. A gas analyzer and method for measuring a concentration of a respiratory gas component are also provided.
10 Citations
19 Claims
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1. A sensor for measuring a concentration of at least one respiratory gas component in a breathing gas, which concentration is varying during a breathing cycle having an inspiration phase, an expiration phase and a phase between the inspiration and expiration, the sensor comprising:
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at least one radiation source configured to emit radiation; at least one radiation sensing detector configured to receive radiation and provide a signal indicative of the concentration of the at least one respiratory gas component; an electronics board configured to receive and process the signal from the at least one radiation sensing detector to determine the concentration of the at least one respiratory gas component; and an energy storage device configured to supply energy to the at least one radiation source; wherein the electronics board is configured to choose from at least an operation mode providing sufficient energy supply to the at least one radiation source for subsequent concentration determination during a first time period, and a rest mode providing a reduced energy supply to the at least one radiation source during a second time period, wherein the operation mode is chosen when a derivative of a concentration of the at least one respiratory gas component approaches zero after a positive derivative peak, and the rest mode is chosen when the derivative decreases to a level below zero. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 16, 19)
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9. A gas analyzer for measuring a concentration of at least one respiratory gas component in a breathing gas, which concentration is varying during a breathing cycle having an inspiration phase, an expiration phase and a phase between the inspiration and expiration, the gas analyzer comprising:
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an airway adapter comprising a sampling cell configured to allow the breathing gas flow, at least one optical component configured to guide radiation, wherein the optical component is in direct or indirect contact with the respiratory gas inside the sampling cell, a first port configured to deliver respiratory gas to the sampling cell, and a second port configured to remove respiratory gas from the sampling cell; a sensor connectable to the airway adapter, the sensor comprising at least one radiation source configured to emit radiation towards the at least one optical component, at least one radiation sensing detector configured to receive for radiation and provide a signal indicative of the concentration of the at least one respiratory gas component, an electronics board configured to receive and process the signal from the at least one radiation sensing detector to determine the concentration of the at least one respiratory gas component, and an energy storage device configured to supply energy to the at least one radiation source; wherein the electronics board is configured to choose from among at least an operation mode providing sufficient energy supply to the at least one radiation source for subsequent concentration determination during a first time period, and a rest mode providing a reduced energy supply to the at least one radiation source during a second time period, wherein the operation mode is chosen when a derivative of a concentration of the at least one respiratory gas component approaches zero after a positive derivative peak, and the rest mode is chosen when the derivative decreases to a level below zero. - View Dependent Claims (10, 15, 17)
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11. A method for measuring a concentration of at least one respiratory gas component in a breathing gas, which concentration is varying during a breathing cycle having an inspiration phase, an expiration phase and a phase between the inspiration and expiration, the method comprising:
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emitting radiation by at least one radiation source towards at least one optical component one of in direct and indirect contact with the respiratory gas inside a sampling cell, receiving the radiation by at least one radiation sensing detector and providing from the at least one radiation sensing detector a signal indicative of the concentration of the at least one respiratory gas component; receiving the signal from the at least one radiation sensing detector and processing the signal in an electronics board to determine the concentration of the at least one respiratory gas component; supplying energy from an energy storage device to the at least one radiation source; and choosing among at least an operation mode providing sufficient energy supply to the at least one radiation source for subsequent concentration determination during a first time period, and a rest mode providing a reduced energy supply to the at least one radiation source during a second time period, wherein the operation mode is chosen when a derivative of a concentration of the at least one respiratory gas component approaches zero after a positive derivative peak, and the rest mode is chosen when the derivative decreases to a level below zero. - View Dependent Claims (12, 13, 14, 18)
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Specification