Oxygen monitoring apparatus and methods of using the apparatus
First Claim
1. A sampling device of a respiratory gas sensor comprising:
- a housing including an interconnection component configured to be received by a complementary interconnection component of a transducer for temporary assembly of the sampling device with the transducer;
a flow passage for receiving a sample, the flow passage being defined by and substantially confined within the housing;
a luminescable material positioned within the flow passage and visible from an exterior of the housing so as to receive radiation from a source of the transducer and emit radiation for sensing by a detector of the transducer upon assembly of the transducer with the sampling device; and
a temperature communication element operatively coupled to the housing and associated with the luminescable material so as to control a temperature of the luminescable material.
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Accused Products
Abstract
Apparatus or systems which employ luminescence-quenching to produce a signal indicative of oxygen concentration. Components of such systems include: (1) an airway adapter, sampling cell, or the like having a casing and a sensor which is excited into luminescence with the luminescence decaying in a manner reflecting the concentration of oxygen in gases flowing through the airway adapter or other flow device and is in intimate contact with a window in the casing; (2) a transducer which has a light source for exciting a luminescable composition in the sensor into luminescence, a light sensitive detector for converting energy emitted from the luminescing composition as that the composition is quenched into an electrical signal indicative of oxygen concentration in the gases being monitored, and a casing which locates the light source and detector in close physical proximity to the window but on the side thereof opposite the sensor; and (3) subsystems for maintaining the sensor temperature constant and the temperature of the window above condensation temperature and for processing the signal generated by the light sensitive detector. Airway adapters, sampling cells, and transducers for such systems are also disclosed.
39 Citations
33 Claims
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1. A sampling device of a respiratory gas sensor comprising:
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a housing including an interconnection component configured to be received by a complementary interconnection component of a transducer for temporary assembly of the sampling device with the transducer; a flow passage for receiving a sample, the flow passage being defined by and substantially confined within the housing; a luminescable material positioned within the flow passage and visible from an exterior of the housing so as to receive radiation from a source of the transducer and emit radiation for sensing by a detector of the transducer upon assembly of the transducer with the sampling device; and a temperature communication element operatively coupled to the housing and associated with the luminescable material so as to control a temperature of the luminescable material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A respiratory gas sensor, comprising:
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a sampling device, comprising; a housing; a flow passage for receiving a sample, the flow passage being defined by and substantially confined within the housing; a luminescable material disposed within the flow passage and visible from an exterior of the housing, luminescence of the luminescable material being quenchable upon exposure thereof to at least one analyzable substance; and a temperature communication element in thermal communication with the luminescable material; and a transducer configured for assembly with at least a portion of the sampling device, the transducer comprising; a housing; a source of at least one wavelength of electromagnetic radiation within the housing, the source oriented to direct radiation toward the luminescable material upon assembly of the transducer with the sampling device; and a detector within the housing, the detector being oriented to sense radiation from the luminescable material upon assembly of the transducer with the sampling device. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification