Buhl Portable Spirometer With Mouthpieces
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Inexpensive spirometer for screening large populations.
Subject blows into disposable mouthpiece.
Indicator registers forced vital lung capacity up to 7 liters.
Reading stays at maximum until reset.
Use as an incentive exerciser for respiratory problems.
Weighs 6 ounces.
Spirometer comes with 100 mouthpieces.