Chest Tube Insertion (WSD)

Chest tube insertion, also called water-seal drainage (WSD), is a procedure in which a hollow flexible tube is placed through the chest wall to drain air, blood, or fluid that has built up around the lungs.

Normally, the space between the lung and the chest wall (called the pleural space) is almost empty, allowing the lungs to expand freely when you breathe. When air, blood, or other fluid collects there, it squeezes the lung and makes breathing difficult or even dangerous. The chest tube connects this space to a sealed drainage bottle outside the body. The water seal in the bottle stops air from flowing back in while letting the unwanted material drain out, giving the lung room to re-expand.

Chest tube insertion is used whenever air, blood, fluid, or pus accumulates in the pleural space in a way that threatens breathing or is unlikely to clear on its own. The main situations include:

• Pneumothorax (a collapsed lung caused by air leaking into the pleural space), including tension pneumothorax, which is a medical emergency.
• Haemothorax (blood in the pleural space), often after a chest injury or surgery.
• Pleural effusion (a large build-up of fluid around the lung) from infections, heart failure, kidney disease, or cancer.
• Empyema (a collection of pus in the pleural space) caused by a severe chest infection.
• Chylothorax (a leak of lymphatic fluid into the pleural space) from injury or certain diseases.
• Post-operative drainage after heart or lung surgery, to remove blood and fluid as the chest heals.

This procedure is not always suitable for every patient. Doctors will weigh the risks carefully before proceeding if any of the following apply:

• The fluid or air pocket is very small and not affecting breathing significantly — a wait-and-watch approach or a thinner needle drain may be used instead.
• The patient has a severe bleeding disorder (coagulopathy) or is on blood thinners that cannot be paused — extra precautions or alternative drainage methods may be needed.
• The pleural space is heavily scarred (from old infections or previous surgery), making safe tube placement more difficult.
• The patient's overall condition is too unstable for a procedure under local anaesthesia — the timing or method may need to be adjusted.

Chest tube insertion is a well-established procedure, but like any intervention that enters the body, it carries recognised risks that your medical team will work to minimise:

• Pain or discomfort at the insertion site — this is the most common experience; pain relief is routinely provided.
• Infection at the wound site or, less commonly, inside the chest (empyema).
• Bleeding around the tube or into the chest, especially if blood vessels are close to the insertion point.
• Tube blockage or kinking, which can slow or stop drainage and may require the tube to be flushed or repositioned.
• The tube slipping out of position (dislodgement) before drainage is complete.
• Air leaking back into the chest if the drainage system is accidentally disconnected.
• Injury to nearby structures — rarely, the lung, diaphragm (the breathing muscle below the lungs), liver, or spleen can be nicked during insertion.
• Subcutaneous emphysema (air trapped under the skin near the tube site), which usually resolves on its own.
• Persistent air leak from the lung, requiring the tube to stay in place longer than expected.
• Rarely, re-expansion pulmonary oedema (fluid in the lung tissue) when a lung that has been compressed for a long time is expanded too quickly.

Because chest tube insertion is often performed urgently, the preparation time can be very short. When time allows, however, the medical team will guide the patient through the steps below.

Before the procedure, patients are usually asked to fast (not eat or drink) for a few hours, particularly if sedation (medication to make you drowsy and relaxed) may be used alongside the local anaesthetic (numbing medication). Any blood thinners or anti-platelet medications are typically paused beforehand if the situation allows, to reduce bleeding risk. Smoking should be avoided, as it affects lung function and healing. The team will ask about all current medications and any known allergies.

Tests that are commonly arranged beforehand include:

• Chest X-ray or CT scan (computed tomography, a detailed cross-sectional scan) to confirm the location and size of the air or fluid pocket.
• Ultrasound of the chest (USG) to guide the exact insertion site, especially for fluid.
• Blood tests to check clotting ability and general health.
• Pulse oximetry (a finger clip that measures oxygen levels in the blood) to monitor breathing status.

During the procedure itself, the steps generally follow this order, though details can vary between hospitals and patients:

• 1. The patient is positioned — usually sitting up slightly or lying on the side, with the arm raised, to open the space between the ribs.
• 2. The skin over the insertion site is cleaned thoroughly with antiseptic solution.
• 3. Local anaesthetic is injected to numb the skin and the tissue between the ribs. Sedation may also be given to reduce anxiety and discomfort.
• 4. A small cut (incision) is made through the skin, usually in the side of the chest between the ribs.
• 5. The doctor gently creates a channel through the muscle layer and the pleural membrane (the thin lining around the lung) using a blunt instrument.
• 6. The chest tube is guided through this channel into the pleural space.
• 7. The tube is secured with stitches and tape so it cannot move.
• 8. The outer end of the tube is connected to the water-seal drainage bottle.
• 9. A chest X-ray is taken immediately after to confirm the tube is in the correct position and that drainage has begun.

After the tube is placed, the patient is monitored closely — usually in a hospital ward or, if the condition is serious, in a high-dependency or intensive care unit (ICU). How long the tube stays in depends on the underlying reason it was placed: some patients need it for only a day or two, while others require it for longer until the air leak stops or the fluid stops draining. The medical team checks the drainage bottle regularly to assess output and ensure the system is working properly.

• Activity: Movement in bed and sitting up is generally encouraged to help the lung re-expand, but getting up and walking is limited until the tube is safely removed. The drainage bottle must always stay below the level of the chest.
• Pain management: Discomfort around the tube is normal; the team will provide pain relief throughout the drainage period.
• Wound and tube care: The insertion site is kept clean and covered with a sterile dressing, which is changed regularly by nursing staff. The tube and connections are checked for air leaks and blockages at every shift.
• Breathing exercises: Patients are usually guided by a physiotherapist (a movement and breathing specialist) to do deep breathing exercises, which help the lung expand against the drainage.
• The tube is removed: Once the lung has re-expanded and drainage has fallen to a safe level, the doctor removes the tube. This is done quickly at the bedside; a stitch may be tied to close the small wound, and a dressing is applied.
• After tube removal: A chest X-ray is taken to confirm the lung has stayed expanded. The wound site is monitored for signs of infection such as redness, swelling, or discharge.
• Follow-up appointments: Most patients have at least one outpatient appointment after discharge to check the chest X-ray and overall recovery.
• Lifestyle and restrictions: Strenuous exercise, heavy lifting, and air travel may be restricted for a period after discharge — the length depends on the original condition and how well the lung has healed. Smoking is strongly discouraged, as it slows healing and increases the risk of recurrence for conditions such as pneumothorax.
• When to seek urgent help: Patients and families are advised to return to hospital promptly if breathing worsens, the wound becomes red or swollen, fever develops, or any unusual pain in the chest appears.