Measuring Breathlessness With A Spirometer

By Serena Price


Difficulty breathing is a common complaint and a conundrum for the diagnostician. A spirometer is a type of pulmonary function monitor PFM), a device that measures the volume of air breathed in and out by the lungs. The printed output from the device will detect two different kinds of atypical ventilation patterns, restrictive and obstructive. There are several types of spirometers that use different approaches for measuring air movement (ultrasound, water gauge, pressure transducers). Today, there are also standalone and computer-based devices.

Lung function tests are utilized to eliminate the presence of serious pulmonary conditions such as asthma, emphysema and bronchitis. They are also performed to assess the influence on the lungs of medications or ambient contaminants, to help determine the cause of breathlessness and to evaluate the progress of treatments. Lung function tests are also performed before surgery on the lungs to take benchmark measurements of lung activity.

Noted Roman physician, Claudius Galen, was the first to assess lung function. Some time during the second century AD, he got a boy to breath in and out into a bladder. Years later, people used inverted bell jars in water. Modern instruments include whole body plethysmography, peak flow meters and a device called a pneumotachometer.

The vast majority of lung conditions are not serious and are easily treatable. It is important first to rule out a serious condition underlying the breathlessness. According to the Mayo Clinic in Arizona, Florida and Minnesota, shortness of breath is defined as an intense feeling of chest tightness accompanied by a feeling of suffocation. This can occur in a single instance or it may have a more chronic pattern.

There half a dozen or so red flag symptoms which, in conjunction with shortness of breath, may point to a serious problem. These red flags include being pale or tired all the time, a chronic cough or wheeze, swollen ankles, difficulty breathing when lying flat, a pain that worsens with exercise, a history of working around asbestos, industrial fumes, wood dust, or in a coal mine and any other persistent or unusual symptoms. If you experience any of the above, then you should consult your doctor.

Asthma is a chronic condition involving inflammation of the airways. It is potentially serious and may be fatal. According to the CDC in Georgia, at any one time in the United States there are 18.9 million non-institutionalized adults diagnosed with this condition. This amounts to 8.2% of the population.

Once serious causes of breathlessness have been eliminated from the differential diagnosis, many cases can be traced to one of two simple and easily remedied causes, either trigger points, also known as muscle knots, or dysfunctional respiratory habits and weak muscles. The treatment for both is safe, cost-free and easily performed by the patient. It involves a program of exercise and trigger point massage.

Invented shortly after Christ walked the Earth, the spirometer is a handy tool for diagnosing the cause of shortness of breath. It can determine the presence of abnormal ventilation, but further tests are often required to eliminate from consideration conditions like asthma, emphysema and bronchitis, among others. Most cases of breathlessness stem from an easily treatable condition, either trigger points, dysfunctional breathing patterns or a combination of the two.




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