Asthma Diagnosis - Testing The Lungs Capacity Of Patients With Asthma

 Testing of lung capacity is commonly done by asthma specialists to detect the severity of asthma. The asthma patient is asked to breathe into a closed tube connected to a machine that measures speed at which he can expel the air from lungs and the total volume of air that is expelled. In many asthma patients there may not be any abnormalities in amount of air expelled. It means that their lung volume is perfect but there are obstructions in their bronchial tubes. This bronchial obstruction prevents air from being exhaled at the normal rate of speed which could be an indication of asthma.

 

The patient is made to undergo lung function test and if the first set of breathing tests show abnormal results then the patient will be asked to inhale a bronchodilator drug and repeat the test. If the second set of tests show more than 20 percent im¬provement in the rate of exhalation of air then the patient is normally diagnosed with asthma.

 

Machines that measure such lung functions range from relatively inexpensive devices, called spirometers, to very sophisticated high-tech computers that record complete lung functioning. Most asthma specialists have some type of breathing machine to diagnose and follow the progress of their patients with asthma.

 

Nowadays a type portable hand held devise known as Peak Flow meter is used to monitor air flow through the bronchial tubes in lungs. With Peak Flow Meter it is now possible for people with asthma to monitor their own lung functions at home itself. These meters are very helpful in recognizing the different stages of an asthma attack and determining what substances in the home or workplace are trigger¬ing asthma.

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