Drainage, care, and removal basics
1
A 28-year-old man is brought to the emergency department after a road traffic collision. He is tachypneic, hypotensive, and has reduced air entry over the right hemithorax. The trachea is deviated to the left, and the right hemithorax is hyperresonant. Needle decompression is immediately performed, with transient clinical improvement.
What is the most appropriate next step?
2
A 42-year-old woman requires chest tube insertion for a large traumatic hemopneumothorax. The operator identifies the fifth intercostal space within the triangle of safety.
Which technique best minimizes the risk of injury to the intercostal neurovascular bundle?
3
During chest tube insertion for a large pneumothorax, blunt dissection is performed through the intercostal muscles. The operator feels that the pleural cavity has been entered.
What should be done immediately before advancing the chest tube?
4
A chest tube has been inserted for a large pleural effusion. The tube is connected to an underwater seal drainage system. Shortly afterward, the tube becomes disconnected from the drainage tubing.
What is the most appropriate immediate action?
5
A 35-year-old man undergoes chest tube insertion for a spontaneous pneumothorax. After insertion, his respiratory distress improves. The underwater seal shows intermittent bubbling during coughing and a fluctuation in fluid level with respiration.
Which finding provides the best radiological confirmation that the chest tube is appropriately positioned and functioning?
6
A 56-year-old man had a chest tube inserted for a traumatic pneumothorax. Forty-eight hours later, he is comfortable, maintaining normal oxygen saturation on room air, and has equal bilateral air entry. There has been no bubbling in the underwater seal for 24 hours. A chest radiograph shows full lung expansion without residual pneumothorax.
What is the most appropriate management?
7
Which complication is most associated with chest tubes?
Feedback
The patient has a tension pneumothorax. Needle decompression is an emergency temporizing measure, not definitive treatment. A chest tube should be inserted immediately after decompression. Imaging must not delay treatment in a clinically unstable patient with clear signs of tension pneumothorax.
The main intercostal vein, artery, and nerve run along the inferior margin of each rib within the costal groove. The pleural space should therefore be entered just above the upper border of the rib below. The usual insertion site is the fourth or fifth intercostal space within the triangle of safety.
The triangle of safety is bounded by:
The lateral border of pectoralis major anteriorly
The anterior border of latissimus dorsi posteriorly
A horizontal line approximately at the fifth intercostal space inferiorly
The base of the axilla superiorly
After blunt dissection and pleural entry, a finger should be inserted into the tract. This confirms that the pleural cavity has been entered, permits assessment for adhesions, and reduces the risk of inserting the tube into lung tissue, the abdominal cavity, or subcutaneous tissues.
Trocar-assisted forceful insertion should be avoided because it increases the risk of visceral and vascular injury.
If the chest tube becomes disconnected from the underwater seal system, the immediate priority is to re-establish an underwater seal. The distal end may be temporarily placed approximately 2–3 cm into sterile water while a new sterile drainage system is prepared.
Prolonged clamping may cause a tension pneumothorax, particularly when an air leak is present. Once reconnected, the patient, tube position, drainage system, and respiratory status should be reassessed.
The tube should also be secured using:
A strong nonabsorbable anchoring suture
A separate closure suture for the wound, where appropriate
An occlusive sterile dressing
Additional fixation of the connecting tubing to prevent traction
A post-insertion chest radiograph should demonstrate that the tube follows an intrathoracic pleural course and that the underlying pathology has improved. In pneumothorax, the tube is generally directed apically and anteriorly. In pleural fluid collections, it is commonly directed posteriorly and basally.
All side holes must lie within the thoracic cavity. A side hole outside the chest wall may cause persistent air leakage, subcutaneous emphysema, inadequate drainage, or failure of lung expansion.
Expected bedside findings include:
Clinical improvement
Appropriate fluid drainage
Respiratory fluctuation or “swinging” in the underwater seal
Bubbling during coughing in a pneumothorax
Absence of tube kinking, blockage, or dependent loops
Continuous bubbling may indicate an ongoing air leak or a leak within the drainage system.
A chest tube inserted for pneumothorax may generally be removed when:
The patient is clinically stable
Respiratory distress has resolved
The lung is fully expanded on chest radiography
There is no ongoing air leak
Bubbling has been absent for an appropriate observation period
The drainage system is functioning normally
There is no significant residual or enlarging pneumothorax
For pleural fluid drainage, removal is also guided by the volume and nature of drainage. Common practical criteria include low output, often approximately less than 100–200 mL over 24 hours depending on the indication, absence of pus or active bleeding, and radiological improvement.
A routine clamping trial is not mandatory in every patient and may be dangerous when an active air leak is present. During removal, the patient is commonly instructed to perform a Valsalva maneuver or hold their breath at end-expiration, while an occlusive dressing is immediately applied.
Complications include organ injury, infection, persistent air leak, or obstruction.
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