Chest Tube Management Study Notes

Chest Tubes and Management Overview

Introduction to Chest Tubes

When managing a chest tube, it is important to understand the conditions leading to its placement. A chest tube is indicated for patients with materials in the pleural space that should not be there. The pleural cavity, in which the lungs reside, operates as a negative pressure environment similar to a vacuum. The presence of air, blood, or other fluid in this area disrupts this negative pressure, adversely affecting lung expansion. Conditions warranting a chest tube include pneumothorax (air), hemothorax (blood), and pleural effusion (fluid).

Chest Tube Usage

  1. Pneumothorax: Involves air in the pleural space. It's critical to remove the air to restore normal lung function and negative pressure.
  2. Hemothorax: Involves blood in the pleural space. Its removal is vital for lung expansion and oxygenation.
  3. Pleural Effusion: Involves fluid accumulation that must be drained if significant.
  4. Management Strategies: The management of these conditions involves utilizing advanced techniques such as ABGs, mechanical ventilation, and rapid sequence intubation.

Inserting the Chest Tube

The medical team inserts a thoracic catheter into the intercostal space directly within the pleural space, connecting it to a chest drainage unit (CDU). This process relies on gravitational force and suction (if used) to remove negative substances from the pleural cavity.

Components of the Chest Drainage Unit (CDU)

There are three essential chambers in a CDU that must be monitored:

1. Drainage Collection Chamber
  • This chamber collects fluid draining from the pleural space.
  • Monitoring Requirements:
    • Volume and consistency:
    • Regular assessment of the amount of drainage is crucial. The volume is monitored, especially post-surgery. A decrease in drainage volume or thickness indicates improvement, while sudden increases signify potential issues such as vessel problems.
    • Documentation: Often, marks may be made on the CDU using sharpies, including dates and times for reference.
  • Expected Changes:
    • After thoracic surgery, drainage amount is expected to decrease gradually.
  • Red Flags:
    • Sudden cessation of drainage may indicate an obstruction, while a sudden spike in volume could denote complications needing immediate attention.
2. Water Seal Chamber
  • This chamber provides a one-way valve mechanism, allowing air to escape but preventing outside air from entering the pleural space.
  • Monitoring Findings:
    • Bubbling: Initial insertion will cause bubbling due to air exiting the pleural space. However, constant bubbling after initial stabilization is abnormal and indicates an air leak.
    • Tidaling: Normal fluctuation of water with respiration; indicates changes in pressure correlating with breathing.
    • Absence of tidaling may occur for two reasons:
      1. The lungs may have fully inflated.
      2. Kinks or tubing obstructions may prevent pressure change from being communicated.
3. Suction Control Chamber
  • This chamber regulates suction levels; types may vary between wet and dry suction control systems.
  • Wet Suction Control:
    • Requires filling to a predetermined level (typically 20 for adults) to create negative pressure.
    • Expected Findings:
    • Gentle, constant bubbling indicates proper functionality. Excessive bubbling suggests the need to reduce suction pressure.
  • Dry Suction Control:
    • Connects directly to wall suction with visual indicators for operating suction levels.

Common Complications and Management

Understanding potential complications aids prevention and rapid response to issues:

1. Compromised Chest Drainage Unit
  • If the CDU becomes disconnected, the immediate action is to submerge the end of the thoracic catheter into sterile water, creating an emergency water seal.
  • Preparation: Maintain sterile water at the bedside for such emergencies.
2. Accidental Discontinuation of the Chest Tube
  • If a chest tube is inadvertently removed, cover the insertion site with a dressing secured on three sides. This creates a one-way flap allowing air to escape but prevents it from entering, mitigating the risk of tension pneumothorax.
  • Continuous Monitoring: Regularly check the patient for signs of complications.

Tension Pneumothorax Overview

A tension pneumothorax arises from air accumulation within the pleural space, causing increasing pressure and interference with lung expansion. Key indicators of a tension pneumothorax include:

  • Symptoms:
    • Absence of breath sounds on the affected side.
    • Severe respiratory distress, pain, tachypnea, and possible cyanosis.
    • Tracheal deviation away from the affected side.
    • Jugular venous distention (JVD).
    • Altered blood pressure and heart rate.

When tension built-up occurs without remediation, emergency medical intervention is necessary. Focus may include:

  • Priority Actions for Staff: Perform a needle decompression to relieve pressure.
  • For nursing staff, it’s vital to monitor patients for signs of pneumothorax and alert physicians as needed.

Conclusion

Understanding the structure and function of a chest tube, alongside the management of its components and potential complications, is essential in clinical practice. Regular assessments, immediate action during complications, and proper monitoring techniques are crucial in ensuring patient safety and effective treatment outcomes in thoracic care.