You are working in a rehabilitation setting performing exercise testing and prescription. You have a subject...

You are working in a rehabilitation setting performing exercise testing and prescription. You have a subject who has a measured airway resistance of 25 cm H2O/L/sec and a measured static compliance of 110 ml/cm H2O. Select correct or incorrect for each of the following statements.

Mark either Incorrect or Correct

1.This subject's elastance is higher than normal.
2.	This subject's time constant is greater than 2500 seconds
3.	This subject most likely has emphysema.
4.	This subject likely has a very small FRC.

Expert Solution

NORMAL AIRWAY RESISTANCE :

airway resistance is the resistance of the respiratory tract to airflow during the inhalation and exhalation .airway resistance can be measured using body plethysmography.

- normal airway resistance is estimated at 2-3 Cm. H20/l/sec.

- airway resistance Can be increased in the respiratory problems

Normal values for the both dymamic and static compliance are 60 to 100 ml/cm /h20 . if the static compliance increases suggest an acute increses in airway resistance and can be assessd further by comparing peak pressure and plteau pressure.

in above qustion :

1. answer : correct .when subjects elastence is highr than normal automatically airway resistance is increased.lung compliance decreased .

2. This subjects time constant is 2500 seconds is true

3. Subjects having emphysema : (correct ) the lung compliance is increased in the chronic obstructive diseases such as emphysema ,.airway resitance is Increased.

4 answer : incorrect ,when FRC increases the lung compliance increases .

Nightingale answered 2 years ago

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