| 摘要 |
An incentive spirometer that indicates the volume of air drawn therethrough is disclosed. The spirometer comprises a housing with a turbine rotatably mounted therein. The turbine is provided with a take-off shaft with which is operably associated a signal device responsive to the rotation of the shaft. Air drawn through the spirometer by a patient rotates the turbine and the signal device indicates the volume of air that has passed through the spirometer.
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