Mastering the Mechanics of Breathing

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What is the approximate intrapleural pressure during passive expiration at rest?

-2 cm H2O

-5 cm H2O (correct)

-8 cm H2O

0 cm H2O

What is the primary force responsible for the production of intrapleural pressure?

Lung elastic recoil

Chest wall elastic recoil (correct)

Airway resistance

Alveolar pressure

What is the function of lung elastic recoil?

To collapse the alveoli

To increase intrapleural pressure

To reduce intrapleural pressure

To open the alveoli (correct)

During inspiration, what happens to the intrapleural pressure?

It becomes more negative Signup and view all the answers

What is the net pressure contribution from the alveoli (lungs) towards the intrapleural space?

+2 cm H2O Signup and view all the answers

What is the function of the negative intrapleural pressure?

Facilitate air intake during inspiration Signup and view all the answers

Which of the following is the primary cause of airway compression in COPD patients?

Increased intrapleural pressure during forced expiration Signup and view all the answers

What is the first line treatment for COPD patients?

SABA Signup and view all the answers

What is the purpose of using LAMA in COPD treatment?

To dilate the airway Signup and view all the answers

What is the role of steroids in COPD treatment?

To slow down the progression of COPD Signup and view all the answers

What is the overall goal of COPD treatment?

To relieve symptoms Signup and view all the answers

During forced expiration, dynamic compression of the airways occurs when the intrapleural pressure is

greater than the airways pressure Signup and view all the answers

Which part of the airways is most susceptible to dynamic compression during forced expiration?

Bronchioles Signup and view all the answers

In healthy individuals, dynamic compression of the airways typically occurs at the

Trachea Signup and view all the answers

Patients with COPD are more prone to dynamic compression of the airways due to

Damaged elastic tissue in small airways Signup and view all the answers

Dynamic compression of the airways can worsen airway obstruction and cause wheezing in patients with COPD due to

Compression or collapse of the airways Signup and view all the answers

What is dynamic compression of the airways?

The compression of airways during forced expiration Signup and view all the answers

Which factors can contribute to dynamic compression of the airways?

All of the above Signup and view all the answers

What clinical relevance does dynamic compression have in patients with COPD?

It worsens airway obstruction and causes wheezing Signup and view all the answers

What is the primary cause of dynamic compression of the airways?

Increased intrapleural pressure during forced expiration Signup and view all the answers

What is the role of inhaled corticosteroids in managing dynamic compression in COPD?

They dilate the airways and reduce inflammation Signup and view all the answers

Why do patients with COPD tend to forcefully expire their breath more frequently?

To overcome airway obstruction and facilitate airflow Signup and view all the answers

What is the main factor contributing to easier compression or collapse of the airways during dynamic compression in COPD patients?

Reduced lung compliance Signup and view all the answers

What is the ultimate goal in managing dynamic compression in COPD patients?

To improve quality of life and reduce symptoms Signup and view all the answers

What is the effect of dynamic compression on airflow during expiration?

It decreases airflow by narrowing the airways Signup and view all the answers

Why is dynamic compression more likely to occur in the bronchioles or bronchus?

They are less supported by cartilage compared to larger airways Signup and view all the answers

What is the primary cause of dynamic compression in patients with COPD?

Loss of lung compliance Signup and view all the answers

What is the main purpose of using bronchodilators in managing dynamic compression in COPD?

To dilate the airways and alleviate airway obstruction Signup and view all the answers

Select the correct reason on the occurrence of dynamic compression of airway:

Intrapleural pressure is greater than air pressure in respiratory tract Signup and view all the answers

Select the correct statement on dynamic compression of airways among COPD patients:

Its main clinical sign is wheezing sound during expiration Signup and view all the answers