Spirometers use a race-based correction or a so-called ethnic adjustment, which assumes a 10–15% smaller lung capacity for Black patients and 4–6% smaller lung capacity for Asian patients compared with their White counterparts.

How does ethnicity affect vital capacity?

According to Hoffman, “the smaller lung capacity of the colored race is in itself proof of an inferior physical organism” (3). In most studies, whites had higher lung capacity than blacks, Chinese or Indians; explanations for findings centred on innate difference (10).

Does ethnicity play a role in lung function testing?

Ethnicity was an independent predictor for all LF measures except PEF, where the effect was marginal. FVC in whites was 13.4% bigger than in Asians of the same height, and the FEV1 was 10.6% greater in whites. The influence of chest dimensions on lung function was trivial.

What factors explain racial differences in lung volumes?

To explain these differences, the characteristics of body size have been explored. Height and age are the most commonly used predictive factors for these lung volumes but it has been suggested that other factors, including fat free mass [2], thoracic diameter and trunk length, may predict lung volume (3-5].

What is a spiral meter?

Spirometer. A spirometer is a diagnostic device that measures the amount of air you’re able to breathe in and out and the time it takes you to exhale completely after you take a deep breath.

What is race correction?

Race correction is the use of a patient’s race in a scientific equation that can influence how they are treated. In other words, some diagnostic algorithms and risk predictor tools adjust or “correct” their results based on a person’s race.

Who has the highest lung capacity?

Pete Reed
British rower and three-time Olympic gold medalist, Pete Reed, is reported to hold the largest recorded lung capacity of 11.68 litres; US swimmer, Michael Phelps is also said to have a lung capacity of around 12 litres.

What is white lung disease?

asbestosis, also called white lung, lung disease that is caused by the prolonged inhalation of asbestos fibres.

Are ethnic differences in lung function explained by chest size?

Conclusions: Differences in chest dimensions did not explain the substantial effect of ethnicity on LF. Mechanisms whereby ethnicity exerts its influence may include differences in inspiratory muscle strength or lung compliance but remain speculative.

Which lung is larger right or left?

The right lung is larger and weighs more than the left lung. Since the heart tilts to the left, the left lung is smaller than the right and has an indentation called the cardiac impression to accommodate the heart.

What is spirometer PPT?

Spirometry in Practice • A technique used to measure air flow in and out of the lungs. • A recording of lung volumes and capacities defined by the respiratory process. These recordings may be static (untimed) or dynamic (timed).