Peak flow meter
First Claim
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1. A peak flow meter comprising:
- a body for accommodating a flow of exhaled air therethrough;
an indicator associated with the body and movable along a path relative to the body to a position along the body, the position related to a peak flow of air exhaled through the body;
a first flow rate scale positioned on the body adjacent the path;
a second flow rate scale positioned on the body adjacent the path;
a flow range selector movably positionable on the body to a first position, wherein movement of the indicator in response to the flow of exhaled air conforms to the first flow rate scale, or in a second position, wherein movement of the indicator in response to the flow of exhaled air conforms to the second flow rate scale.
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Abstract
A peak flow meter is described with a body having a sample channel and at least one bypass channel. One of at least two flow range scales may be selected using a flow range selector to adjust the sensitivity of the peak flow meter. A flow range selection indicator provides visual reference as to which flow range scale has been selected. A peak flow calculator used in cooperation with zone indicators on the peak flow meter permits a user to customize the peak flow meter for that user'"'"'s predicted personal best exhalation range.
41 Citations
20 Claims
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1. A peak flow meter comprising:
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a body for accommodating a flow of exhaled air therethrough;
an indicator associated with the body and movable along a path relative to the body to a position along the body, the position related to a peak flow of air exhaled through the body;
a first flow rate scale positioned on the body adjacent the path;
a second flow rate scale positioned on the body adjacent the path;
a flow range selector movably positionable on the body to a first position, wherein movement of the indicator in response to the flow of exhaled air conforms to the first flow rate scale, or in a second position, wherein movement of the indicator in response to the flow of exhaled air conforms to the second flow rate scale. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A peak flow meter system comprising:
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a peak flow meter having a hollow body for accommodating a flow of air exhaled therethrough, a peak flow indicator associated with said body responsive to the flow of air and movable relative to the body to a position along at least two scales on the body, the position related to a peak flow of air, the body having a range selector configured to allow a user to select a sensitivity of the peak flow meter, such that movement of the indicator conforms to a flow rate set forth on one of the at least two scales; and
a zone calculator usable with the peak flow meter, the zone calculator having zone selection means for determining a position of zone indicators adjacent the at least two scales on the peak flow meter representative of a user'"'"'s predicted personal best peak flow.
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15. A peak flow meter comprising:
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an inlet for receiving a flow of exhaled air into a hollow body;
an outlet for venting at least a portion of the flow of exhaled air;
a piston movably positioned inside the hollow body for moving a peak flow indicator along a path in response to the flow of exhaled air;
at least two scales positioned adjacent the path, each of the at least two scales demarcating a different flow range; and
a flow range selector movably positionable on the body at a first position, wherein movement of the peak flow indicator in response to the flow of exhaled air conforms to a first of the at least two scales, or at a second position, wherein movement of the indicator in response to the flow of exhaled air conforms to a second of the at least two scales. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification