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A spirometer is an apparatus for measuring the volume of air inspired and expired by the lungs. It is a precision differential pressuretransducer for the measurements of respiration flow rates. The spirometer records the amount of air and the rate of air that is breathed in and out over a specified time. The Spirometer and attached flow head function together as a pneumotachometer, with an output signal proportional to airflow. It was invented by John Hutchinson in 1846.
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NAL Energy Corporation Reports Fourth Quarter and Year-End 2010 Results
9 Mar 2011 at 1:46pm
CALGARY, ALBERTA--(Marketwire - March 9, 2011) - NAL Energy Corporation ("NAL" or the "Corporation") (TSX:NAE) today announced its financial and operational results for the fourth quarter and year ended December 31, 2010 as well as 2010 year-end reserves. All amounts are in Canadian dollars unless otherwise stated. S
Energy Future Holdings Reports Fourth Quarter and Full Year 2010 Results
18 Feb 2011 at 5:00am
Energy Future Holdings Corp. today reported consolidated financial results for the fourth quarter and year ended December 31, 2010. The full year results were reported in EFH’s Annual Report on Form 10-K filed with the Securities and Exchange Commission this morning.
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Using a Peak Flow Meter to Manage Asthma
Even children ages 4 and up should be able to use a peak flow meter with good results. People with moderate-to-severe asthma should have a peak flow meter at home.
Peak flow meter: Results - MayoClinic.com
Peak flow meter — Overview covers how to use this simple tool to monitor asthma symptoms.
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