Using A Spirometer To Identify Breathlessness

Shortness of breath is one of the main complaints that sends people to the doctor's office. One of the tools used to help diagnose the cause of breathlessness is called a spirometer. This is a kind of pulmonary function monitor (PFM) and measures the volume of air inspired and expired through the lungs. The printed output from the device is a graph, and this can indicate whether the breathing dysfunction is restrictive or obstructive. Spirometers are constructed differently to enable different strategies for measuring the movement of air (pressure transducers, ultrasound, water gauge).

Pulmonary function tests are used to rule out lung diseases such as emphysema, bronchitis and asthma. They are also used to determine the cause of shortness of breath, assess the effects of medications or contaminants on the lungs and to monitor the progress of treatment. They are performed in advance of lung surgery as a benchmark with which to compare the effectiveness of the procedure.

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.

According to the Mayo Clinic, shortness of breath may be defined as an intense chest tightening and a feeling of being suffocated. It may be confined to a single episode or it may become chronic. While it is important to rule out any serious problems underlying breathlessness, in most cases the root cause is harmless and easily curable.

Along with instrumentation, there are a half dozen or more so-called "red flag" symptoms and signs that may herald a serious lung condition. These include persistent pallor and fatigue, swollen ankles, a chronic wheeze or cough, having a hard time breathing when lying flat, pain worsening with activity, or any other persistent or strange symptoms. A history of working in an environment where there is asbestos, wood dust, hazardous chemical fumes or in a coal mine might also contribute to a lung disorder.

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 all serious problems have been eliminated from consideration, many cases of shortness of breath can be attributed to one of two causes, muscle knots (aka trigger points) or dysfunctional breathing habits together with weak muscles. Treatment includes exercises to strengthen the muscles. For trigger points, therapy involves massage, which is almost always successful.

A spirometer is an instrument that has been in use for two millennia to detect the cause of breathlessness. It can determine whether it is present and identify whether it is restrictive or obstructive but requires further investigations to rule out the presence of any serious conditions, such as emphysema, asthma or bronchitis. Once these have been eliminated from consideration, they may be attributable to either trigger points or incorrect breathing patterns.

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