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 in 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; and
wherein the flow range selector is positioned to block a portion of the flow of exhaled air when in the second position.
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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.
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Citations
18 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 in 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; and wherein the flow range selector is positioned to block a portion of the flow of exhaled air when in the second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. 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; 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; and wherein the flow range selector is positioned to block a portion of the flow of exhaled air when at the second position. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification