Manometer CO2 detector combination
First Claim
Patent Images
1. A self-contained diagnostic monitor for determining both air pressure and carbon dioxide (CO2) content in a patient monitoring system, the monitor comprising:
- a housing having a first and second port leading inside the housing, a CO2 detector containing a calorimetric CO2 detection material mounted within the housing and a manometer for indicating pressure to and from the patient mounted within the housing, the housing having a clear cover portion for viewing the CO2 detection material and a pressure indicator on the manometer.
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Accused Products
Abstract
A top and bottom housing joined together have a patient port and ventilation port in axial alignment. The top housing contains dry indicator paper for changing color in response to the presence of CO2. In addition, a shaft having a pointer on a top portion rotates in response to air in the housing to indicate pressure. A helical outer wall of the shaft engages a notch in a hollow stem attached to a membrane in the lower housing so the shaft rotates in response to air pressure on the membrane.
54 Citations
18 Claims
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1. A self-contained diagnostic monitor for determining both air pressure and carbon dioxide (CO2) content in a patient monitoring system, the monitor comprising:
a housing having a first and second port leading inside the housing, a CO2 detector containing a calorimetric CO2 detection material mounted within the housing and a manometer for indicating pressure to and from the patient mounted within the housing, the housing having a clear cover portion for viewing the CO2 detection material and a pressure indicator on the manometer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A self-contained diagnostic monitor for determining both air pressure and carbon dioxide content in a patient monitoring system, the monitor comprising:
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top housing sealed to a bottom housing, the top housing having a first port adapted to be connfected to a ventilation system at a first end portion, a support frame supporting a CO2 detector consisting of colorimetric impregnated paper, the support frame having a central annular bore and openings for passage of air, a shaft having an outer helical configuration and a pointer at a top portion rotating on the shaft, the pointer responsive to pressure flow variations, the shaft passing through the impregnated paper and the central annular bore and a visually clear cap sealed to the top housing over the shaft and support frame;
the bottom housing having a second port adapted to be connected to a patient ventilation tube, the first and second port axially aligned when the top housing is joined to the bottom housing;
the bottom housing having a receptacle at a portion distal from the second port, the receptacle containing a spring overlaid by a membrane, the membrane connected to a hollow stem directed upwardly from a central portion of the membrane, the hollow stem having a notch on an inside wall for receipt of the helical configuration from the solid shaft, a first baffle overlaying the membrane, a filter overlaying the first baffle and a second baffle overlaying the filter, the first and second baffles and filter having bores for passage of the hollow stem, so that when the top and bottom housings are joined together, air from a ventilation system or patient flows through the monitor and air pressure flow and CO2 presence over CO2, in ambient air are determined by visual inspection through the clear cap. - View Dependent Claims (13)
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14. A self-contained diagnostic monitor for determining both air pressure and carbon dioxide content in a patient monitoring system, the monitor comprising:
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a top housing having a first port adapted to be connected to a ventilation system and an adjacent support frame having an annular opening with multiple inwardly projecting flanges, a clear disc having downwardly descending legs engaged between the flanges, a top surface of a calorimetric CO2 detector paper adhesively attached to a bottom surface of the clear disc, a shaft having an outer helical configuration and a pointer at a top portion rotating with the shaft, the pointer responsive to pressure flow variations, the shaft rotating under the CO2 detector paper and the pointer projecting from under the CO2 detector paper and pointing towards indicia on an outer annular portion of the clear disc;
a bottom housing having a second port adapted to be connected to a patient ventilation tube and the bottom housing attached to the top housing;
the bottom housing having a receptacle at a portion distal from the second port, the receptacle containing a spring overlaid by a membrane, the membrane having a hollow stem directed upwardly from a central portion of the membrane, the hollow stem having a notch on an inside wall for receipt of the helical configuration on an outside surface of the shaft, a first baffle overlaying the membrane, a filter overlaying the first baffle and a second baffle overlaying the filter, the first and second baffles and filter having bores for passage of the hollow stem, so that when the top and bottom housings are joined together, air from a ventilation system or patient flows through the monitor and air pressure and CO2 presence over CO2 in ambient air are determined by visual inspection through the clear disc. - View Dependent Claims (15, 16, 17, 18)
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Specification