What it is (overview)

Chest tube placement with imaging guidance (also called image-guided chest tube insertion or thoracostomy tube placement) is a procedure used to place a flexible tube into the thoracic cavity—the space around the lungs—so unwanted air, fluid, blood, or pus can be drained. Removing this material helps the lung re-expand, improves breathing, and can relieve chest pain and pressure.

“Imaging guidance” means the clinician uses real-time pictures—most commonly ultrasound and/or X-ray (and sometimes CT)—to select the safest entry site, guide the tube to the correct location, and confirm it is positioned properly. This is especially helpful when fluid collections are small, loculated (pocketed), or when anatomy is complex.

This is a treatment procedure rather than a blood test. It doesn’t “measure” a number; instead, it addresses a problem seen on imaging (such as a pneumothorax or pleural effusion) and monitors response through drainage output and follow-up imaging. In plain language, the “results” mean:

• Successful placement: Imaging shows the chest tube tip is in the right space, and the tube is functioning.
• Effective drainage: Air/fluid is coming out as expected, respiratory symptoms improve, and repeat X-ray/ultrasound shows the lung is expanding and the collection is shrinking.
• Need for adjustment or further care: If imaging shows the tube is kinked, not in the ideal position, or drainage is inadequate, the tube may need repositioning, upsizing, or additional procedures.

In some cases, fluid drained from the chest is sent to the lab for testing (for example, to look for infection or cancer cells), but that is separate from the placement procedure itself.

When & why it's usually done

Doctors typically recommend an image-guided chest tube when there is a significant amount of air or fluid around the lung that is causing symptoms, worsening on imaging, or could lead to serious complications. It may be done urgently in an emergency or in a planned setting with interventional radiology or a surgical team.

Common reasons include:

• Pneumothorax (collapsed lung): Air leaks into the pleural space and compresses the lung. A chest tube provides drainage of air so the lung can re-expand.
• Pleural effusion: Excess fluid builds up around the lungs, often causing shortness of breath, cough, or chest heaviness. A tube can drain larger or recurrent effusions.
• Empyema or complicated infection: Infected fluid/pus in the pleural space often requires tube drainage plus antibiotics.
• Blood in the chest (hemothorax): After trauma or surgery, blood may collect around the lung and need evacuation.
• After chest surgery: Some patients need temporary tube drainage to remove air/fluid as the lungs heal.

Symptoms and findings that often prompt imaging and possible tube placement include:

• Sudden or worsening chest pain (especially sharp pain with breathing)
• Shortness of breath or rapid breathing
• Low oxygen levels
• Respiratory symptoms such as cough, chest tightness, or inability to take a deep breath
• Abnormal lung sounds on exam (for example, decreased breath sounds)
• Imaging results on X-ray or ultrasound showing air/fluid compressing the lung

Imaging guidance is often chosen because it can improve accuracy and safety—helping avoid organs and blood vessels, targeting the best pocket of fluid, and confirming correct placement quickly.

Common diseases related to it

• Pneumothorax (including spontaneous, traumatic, or ventilator-associated pneumothorax)
• Pleural effusion (including heart failure–related, inflammatory, or malignant effusion)
• Empyema (infected pleural effusion) and complicated parapneumonic effusion
• Hemothorax (blood in the pleural space)
• Chylothorax (lymphatic fluid in the pleural space)
• Malignancy involving the pleura (e.g., metastatic cancer causing recurrent effusion)
• Thoracic trauma (rib fractures with air or fluid around the lung)
• Postoperative pleural air leak or fluid collection after chest surgery

Health goals where it may help

• Relieving shortness of breath and improving breathing by removing air/fluid from the thoracic cavity
• Preventing complications of pneumothorax or large pleural effusions (such as worsening lung collapse or impaired oxygenation)
• Supporting recovery after chest trauma or surgery through controlled drainage and lung re-expansion
• Treating and monitoring pleural infections (helping clear pus/infected fluid alongside antibiotics)
• Guiding diagnosis and care planning when drained fluid is sent for lab analysis (e.g., infection workup, cancer evaluation)
• Reducing chest pain and pressure related to pleural air/fluid buildup