Limits...
Measuring lung function using sound waves: role of the forced oscillation technique and impulse oscillometry system.

Brashier B, Salvi S - Breathe (Sheff) (2015)

Bottom Line: Not only does it help in arriving at a specific diagnosis, but it also helps in evaluating severity so that appropriate pharmacotherapy can be instituted, it helps determine prognosis and it helps evaluate response to therapy.Spirometry is currently the most commonly performed lung function test in clinical practice and is considered to be the gold standard diagnostic test for asthma and COPD.Children aged <5 years, elderly people and those with physical and cognitive limitations cannot perform spirometry easily.

View Article: PubMed Central - PubMed

Affiliation: Chest Research Foundation, Marigold Complex, Kalyaninagar, Pune, India.

ABSTRACT
Measuring lung function is an important component in the decision making process for patients with obstructive airways disease (OAD). Not only does it help in arriving at a specific diagnosis, but it also helps in evaluating severity so that appropriate pharmacotherapy can be instituted, it helps determine prognosis and it helps evaluate response to therapy. Spirometry is currently the most commonly performed lung function test in clinical practice and is considered to be the gold standard diagnostic test for asthma and COPD. However, spirometry is not an easy test to perform because the forceful expiratory and inspiratory manoeuvres require good patient co-operation. Children aged <5 years, elderly people and those with physical and cognitive limitations cannot perform spirometry easily.

No MeSH data available.


Related in: MedlinePlus

Respiratory resistance versus frequency.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4487383&req=5

Figure 2: Respiratory resistance versus frequency.

Mentions: In healthy adult subjects, R is nearly independent of oscillation frequency (i.e. resistance is more or less the same at frequencies between 5 and 20 Hz). When airway obstruction occurs, either central or peripheral, R5 is increased above normal values. Central airway obstruction elevates R evenly independent of oscillation frequency, whereas peripheral airways obstruction increases R at low frequencies, an effect that diminishes with increasing frequency (fig. 2). Therefore, in small airways obstruction, R becomes frequency dependent and is considered to be a characteristic feature. Small children normally present frequency dependence of resistance, and this may be greater than in adults in the presence of peripheral airflow obstruction. Resistance is measured in cmH2O⋅L−1⋅s−1 or kPa⋅L−1⋅s−1.Figure 2


Measuring lung function using sound waves: role of the forced oscillation technique and impulse oscillometry system.

Brashier B, Salvi S - Breathe (Sheff) (2015)

Respiratory resistance versus frequency.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4487383&req=5

Figure 2: Respiratory resistance versus frequency.
Mentions: In healthy adult subjects, R is nearly independent of oscillation frequency (i.e. resistance is more or less the same at frequencies between 5 and 20 Hz). When airway obstruction occurs, either central or peripheral, R5 is increased above normal values. Central airway obstruction elevates R evenly independent of oscillation frequency, whereas peripheral airways obstruction increases R at low frequencies, an effect that diminishes with increasing frequency (fig. 2). Therefore, in small airways obstruction, R becomes frequency dependent and is considered to be a characteristic feature. Small children normally present frequency dependence of resistance, and this may be greater than in adults in the presence of peripheral airflow obstruction. Resistance is measured in cmH2O⋅L−1⋅s−1 or kPa⋅L−1⋅s−1.Figure 2

Bottom Line: Not only does it help in arriving at a specific diagnosis, but it also helps in evaluating severity so that appropriate pharmacotherapy can be instituted, it helps determine prognosis and it helps evaluate response to therapy.Spirometry is currently the most commonly performed lung function test in clinical practice and is considered to be the gold standard diagnostic test for asthma and COPD.Children aged <5 years, elderly people and those with physical and cognitive limitations cannot perform spirometry easily.

View Article: PubMed Central - PubMed

Affiliation: Chest Research Foundation, Marigold Complex, Kalyaninagar, Pune, India.

ABSTRACT
Measuring lung function is an important component in the decision making process for patients with obstructive airways disease (OAD). Not only does it help in arriving at a specific diagnosis, but it also helps in evaluating severity so that appropriate pharmacotherapy can be instituted, it helps determine prognosis and it helps evaluate response to therapy. Spirometry is currently the most commonly performed lung function test in clinical practice and is considered to be the gold standard diagnostic test for asthma and COPD. However, spirometry is not an easy test to perform because the forceful expiratory and inspiratory manoeuvres require good patient co-operation. Children aged <5 years, elderly people and those with physical and cognitive limitations cannot perform spirometry easily.

No MeSH data available.


Related in: MedlinePlus