Chest Drain Care Nursing
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Direct answer
An intercostal chest drain is a tube inserted through the chest wall into the pleural space to evacuate air (pneumothorax), blood (haemothorax), pus (empyema) or fluid, restoring negative pleural pressure and lung expansion. The nurse maintains a sealed underwater drainage system with the water-seal tube 2 cm below the water level, keeps the unit below chest level, and continuously observes drainage, tidaling and bubbling. Most complications of chest drains are preventable nursing errors — raising the bottle above the chest, clamping without orders, or missing a disconnection.
What you must remember
- The classic three-bottle system has a collection bottle, a water-seal bottle (tube 2 cm under water acting as a one-way valve) and a suction-control bottle; modern compact units work on the same principle.
- Keep the drainage unit upright and well below chest level; fluid can siphon back if the unit is raised above the chest.
- Tidaling — a rise of the water column on inspiration and fall on expiration — confirms patency; it stops if the lung has fully expanded or the tube is blocked.
- Never clamp the drain routinely; if the unit must be changed or a disconnection occurs, momentarily clamp close to the patient and use asepsis, or place the tube's end in sterile water as a temporary water seal per protocol.
- Check the tubing for dependent loops and kinks, and mark and chart drainage hourly initially — sudden gushes of bright blood (over about 150-200 ml per hour) suggest active bleeding.
- Encourage deep breathing, coughing and position changes as advised; during transport keep the unit below the chest and unclamped.
Common confusion
Tidaling and bubbling are constantly mixed up. Tidaling reflects pleural pressure swings with breathing and confirms the system is patent; bubbling reflects air being evacuated from the pleural space or a leak. Their absence or excess each means something different, and examiners love asking what to do when each disappears. A second frequent error is clamping a drain during ambulation or transport — clamping can cause tension pneumothorax.
Exam-focused takeaway
MCQs focus on the 2 cm water-seal rule, unit position relative to the chest, indications for and dangers of clamping, and the meaning of tidaling changes after lung expansion. Procedure questions cover setting up a closed system and securing connections. Viva short notes include care of the patient with an intercostal drain and criteria for removal — lung re-expanded, no air leak, drainage minimal, followed by a check X-ray.
Frequently asked questions
Why must the drainage unit stay below chest level?
Gravity must drain fluid away from the patient; if the unit is raised, fluid can flow back into the pleural space. It is kept upright on the floor or hung low.
What does continuous bubbling in the water-seal chamber indicate?
Air entering the system continuously — from the pleural space (persistent air leak) or a loose connection. Check the connections first, then inform the physician.
Why is the chest drain not clamped routinely?
Clamping blocks the escape of air; continued leakage then builds pressure and can cause tension pneumothorax. Clamping is brief and ordered only for unit change or leak assessment.
What observations are charted for a chest drain?
Amount, colour and consistency of drainage marked at timed intervals, tidaling and bubbling pattern, respiratory status, saturation, dressing condition and comfort.
What should the nurse do if the tube disconnects from the system?
Clamp the tube close to the chest or dip its end in sterile water to recreate a seal while a sterile new unit is set up, and assess the patient.