Chronic Type II Respiratory Failure Cause
Type II respiratory failure, also known as hypercapnic respiratory failure, is characterized by elevated carbon dioxide (CO2) levels in the blood due to inadequate ventilation.
Identifying the Most Common Cause
The most frequent cause of chronic type II respiratory failure is persistently impaired lung function that prevents effective exhalation of CO2 over a long period.
- Severe COPD: Chronic Obstructive Pulmonary Disease (COPD) encompasses conditions like chronic bronchitis and emphysema. These progressively damage lung tissue and airways, leading to airflow obstruction and gas trapping. This severely compromises the ability to exhale CO2 adequately, making it the leading cause of chronic type II respiratory failure.
- Severe Pneumonia: Typically causes acute respiratory failure (often type I, but can be type II) due to infection and inflammation, not usually the primary cause of *chronic* type II failure.
- Severe Bronchial Asthma: While severe asthma exacerbations can cause acute respiratory failure, it's less common as a cause of chronic type II failure compared to COPD.
- Severe Pulmonary Thromboembolism: Usually leads to acute respiratory failure (often type I) due to blocked blood flow to the lungs. Chronic forms can cause pulmonary hypertension but are not the most common cause of chronic type II failure.
Conclusion
Based on prevalence and pathophysiology, Severe COPD is the most common underlying condition leading to chronic type II respiratory failure.
Important Questions from COPD
- The distance walked in 6 minutes is an indirect measure of which of the following variables of the 'BODE Index' which is used to assess the prognosis in chronic obstructive pulmonary disease?
- Which of the following are categorised under obstructive lung disease ?
1. Bronchial asthma
2. Bronchiectasis
3. Bronchiolitis
4. Pulmonary sarcoidosis
Select the correct answer using the code given below: - Risk factors for development of COPD include which of the following ?
1. Tobacco smoking
2. Recurrent infection
3. Coal dust exposure
4. High socio-economic status
Select the correct answer using the code given below: - A 65-year-old male smoker has been diagnosed with Chronic Obstructive Pulmonary Disease (COPD). On pulmonary function testing, the $FEV_1/FVC < 0.7$ and $FEV_1 = 42\%$ of predicted. The severity of airflow obstruction in this patient as per GOLD criteria is :
Which of the following are the physiological abnormalities in chronic obstructive lung disease?
1. Reduced total lung capacity(TLC)
2. Increased functional residual capacity
3. Increased residual volume(RV)
4. Increased RV/TLC ratio
Select the correct answer using the code given below:
