30 Questions
What is the approximate intrapleural pressure during passive expiration at rest?
-5 cm H2O
What is the primary force responsible for the production of intrapleural pressure?
Chest wall elastic recoil
What is the function of lung elastic recoil?
To open the alveoli
During inspiration, what happens to the intrapleural pressure?
It becomes more negative
What is the net pressure contribution from the alveoli (lungs) towards the intrapleural space?
+2 cm H2O
What is the function of the negative intrapleural pressure?
Facilitate air intake during inspiration
Which of the following is the primary cause of airway compression in COPD patients?
Increased intrapleural pressure during forced expiration
What is the first line treatment for COPD patients?
SABA
What is the purpose of using LAMA in COPD treatment?
To dilate the airway
What is the role of steroids in COPD treatment?
To slow down the progression of COPD
What is the overall goal of COPD treatment?
To relieve symptoms
During forced expiration, dynamic compression of the airways occurs when the intrapleural pressure is
greater than the airways pressure
Which part of the airways is most susceptible to dynamic compression during forced expiration?
Bronchioles
In healthy individuals, dynamic compression of the airways typically occurs at the
Trachea
Patients with COPD are more prone to dynamic compression of the airways due to
Damaged elastic tissue in small airways
Dynamic compression of the airways can worsen airway obstruction and cause wheezing in patients with COPD due to
Compression or collapse of the airways
What is dynamic compression of the airways?
The compression of airways during forced expiration
Which factors can contribute to dynamic compression of the airways?
All of the above
What clinical relevance does dynamic compression have in patients with COPD?
It worsens airway obstruction and causes wheezing
What is the primary cause of dynamic compression of the airways?
Increased intrapleural pressure during forced expiration
What is the role of inhaled corticosteroids in managing dynamic compression in COPD?
They dilate the airways and reduce inflammation
Why do patients with COPD tend to forcefully expire their breath more frequently?
To overcome airway obstruction and facilitate airflow
What is the main factor contributing to easier compression or collapse of the airways during dynamic compression in COPD patients?
Reduced lung compliance
What is the ultimate goal in managing dynamic compression in COPD patients?
To improve quality of life and reduce symptoms
What is the effect of dynamic compression on airflow during expiration?
It decreases airflow by narrowing the airways
Why is dynamic compression more likely to occur in the bronchioles or bronchus?
They are less supported by cartilage compared to larger airways
What is the primary cause of dynamic compression in patients with COPD?
Loss of lung compliance
What is the main purpose of using bronchodilators in managing dynamic compression in COPD?
To dilate the airways and alleviate airway obstruction
Select the correct reason on the occurrence of dynamic compression of airway:
Intrapleural pressure is greater than air pressure in respiratory tract
Select the correct statement on dynamic compression of airways among COPD patients:
Its main clinical sign is wheezing sound during expiration
Test your knowledge on the dynamic compression of the airway and the forces involved in breathing. Explore concepts such as intrapleural pressure, chest wall elastic recoil, and lung elastic recoil.
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