Using A Spirometer To Identify Breathlessness

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.

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.

Most causes of shortness of breath are benign and easily reversible. First, it is essential to rule out more sinister causes. The Mayo Clinic defines shortness of breath as a severe tightening of the chest and a sensation of being suffocated. There may be a single episode or there may be a pattern of episodes.

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, a chronic inflammation of the airways, is one of these serious conditions. The Centers for Disease Control in Atlanta estimate that, at any one time, there are as many as 18.9 million ambulatory adults with asthma. This equates to 8.2 percent of those adults who are not institutionalized.

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.

The spirometer is a device that has been in use for nearly two thousand years for the detection of breathlessness. It can identify whether breathlessness is present, but further investigations are required to rule out serious conditions like asthma. Once sinister problems have been ruled out, the cause of shortness of breath is most likely a combination of trigger points and dysfunctional breathing technique. This can be easily remedied with a regime of trigger point massage and breathing exercises.




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