RT 131 Pneumothorax

Pneumothorax involves the accumulation of gas, primarily air, in the pleural space, which is the area between the visceral and parietal pleura.
Normally, the pleural space is very narrow and filled with pleural fluid, acting as a lubricant for lung movement. In a pneumothorax, the space is filled with air, which can lead to lung compression.
This condition is classified as a restrictive lung disorder, as it restricts lung expansion, resulting in difficulty breathing as the lungs cannot fully inflate.

Definition: Occurs when there is a tear or opening that allows gas to enter the pleural space, but the opening subsequently closes, preventing further gas inflow.
Implications: Small pneumothoraxes can be absorbed naturally by the body without immediate intervention; larger ones require treatment if they cause significant symptoms.

Definition: The pleural space is in direct contact with the atmosphere, allowing air to enter and exit freely with the breathing cycle.
Consequences: Lung collapse on the affected side, potentially leading to severe respiratory distress and hemodynamic instability.

Definition: A trapped air in the pleural space increases pressure, leading to lung collapse. When inhaled, air enters the pleural space, but cannot escape on exhalation due to a valve-like effect created by the pleura.
Clinical symptoms: Rapid deterioration in respiratory and cardiovascular function, leading to compressive forces on the lungs and heart.

Can occur due to external trauma, such as a stab wound or gunshot injury.
Example scenarios:
- Stabbing incident causing multiple punctures in the chest.
- Incident involving cleaning a loaded firearm.

Definition: Occurs without any significant injury, often in young males, especially during periods of rapid body growth.
Mechanism: Micro-tears may form in the visceral pleura, leading to air leaking into the pleural space.

Small pneumothoraxes are usually asymptomatic and may be unnoticed by patients; larger pneumothoraxes typically cause severe shortness of breath and require medical intervention.
A small pneumothorax can cause atelectasis (partial or complete lung collapse) adjacent to the affected area. Total lung collapse can occur with larger impacts.
Tension pneumothorax can lead to decreased cardiac output and venous return due to the pressure exerted on central structures such as the heart.

Physical Examination: Percussion may reveal hyper-resonance over areas devoid of lung tissue.
Auscultation: Absence or reduction of breath sounds in affected areas.
Tracheal Shift: A significant pneumothorax may cause a tracheal deviation.
- Severe cases also show movement of the heart due to pressure.

Chest X-ray: Rapid identification of air accumulation in the pleural space.
CT Scan: Utilized if chest X-ray results are inconclusive; more sensitive for detecting small or complex pneumothorax.

Observation: For small pneumothoraxes that are asymptomatic, the body can absorb the air naturally.
Chest Tube Insertion: Required for larger pneumothoraxes or those causing significant respiratory distress. The tube allows for drainage of air from the pleural cavity, facilitating lung re-expansion.
- Important note: Insertion is typically done at lower intercostal spaces, and above ribs to avoid nerve damage.
Needle Decompression: Immediate procedure in cases of tension pneumothorax, inserting a large-bore needle to relieve pressure. This is a temporary measure.

After treatment, continued monitoring is essential. Patients should be on supplemental oxygen, and early mobility encouraged to prevent complications such as DVT.
Chest tubes may be left in place for 24-48 hours post lung re-expansion before removal to ensure stability.
Patients may be put on a lung expansion protocol to enhance recovery and gas exchange stability.

Potential complications include infections, further lung damage, or failure to fully resolve the pneumothorax after treatment. Understanding and monitoring changes in symptoms are critical for respiratory therapists working with pneumothorax patients.

Closed: Latent for the body to absorb.
Open: Air freely entering pleural space - high risk of collapse.
Tension: Emergently requiring immediate intervention to relieve internal pressure.
Traumatic: Physical injuries leading to gas in the pleural space.
Spontaneous: Often in young males, grows with little warning or symptoms.

Pneumothorax presents a variety of causes, types, and management strategies. Understanding the mechanisms, implications, and treatment protocols is essential for effective clinical practice.