Respiratory Nursing: Chest Tube Management

A chest drainage system is a lifeline for patients with compromised lung function. As a nurse, your skilled management of this system directly prevents life-threatening complications and promotes healing.

Understanding the "Why": Indications and System Components

A chest tube (or thoracostomy tube) is a flexible catheter inserted through the chest wall into the pleural space—the potential area between the lung's visceral pleura and the chest wall's parietal pleura. It is connected to a drainage system to remove abnormal contents. The primary indications are pneumothorax (air in the pleural space causing lung collapse) and pleural effusion (excess fluid, which can be transudative or exudative). Other reasons include hemothorax (blood), empyema (pus), or post-operatively after thoracic surgery.

The standard drainage system is a three-chamber setup. The Collection Chamber receives fluid or blood from the patient, allowing you to measure output. The Water Seal Chamber acts as a one-way valve; its column of water prevents air from being sucked back into the pleural space during inhalation. Bubbling here indicates an active air leak from the patient's pleural space. The Suction Control Chamber regulates negative pressure, either via a water column (wet suction) or a dial (dry suction). Understanding this setup is non-negotiable; it is the foundation for all subsequent assessment and troubleshooting.

Clinical Vignette: Mr. Chen, 68, presents with sudden shortness of breath and sharp chest pain. A chest X-ray reveals a large right-sided spontaneous pneumothorax. A size 28Fr chest tube is inserted in the 4th-5th intercostal space (mid-axillary line) and connected to a drainage system with -20 cm H₂O suction.

Initial Setup and Essential Maintenance

Upon assuming care, your first priority is system integrity. The chest tube insertion site is covered with an occlusive dressing, typically with petrolatum gauze. Check this dressing for drainage and ensure it remains intact. All tubing connections must be taped securely. The drainage system itself must always be kept below the level of the patient's chest; placing it on the bed or lowering it to the floor creates a siphon effect, potentially drawing fluid back into the pleural space.

Patient positioning is key for drainage and comfort. Encourage the patient to sit upright or in a semi-Fowler's position to facilitate lung expansion and drainage via gravity. Regularly assist with turning, deep breathing, and coughing exercises. This mobilizes secretions, promotes lung re-expansion, and helps drain the pleural space. The tubing should have enough slack to allow patient movement without tension but should be coiled neatly on the bed, avoiding kinks or loops that could obstruct flow.

Ongoing Assessment: Monitoring Output, Character, and Air Leaks

Your assessment is a continuous process. Every hour for the first 24 hours, and then per unit protocol, you must assess and document the amount, color, and consistency of drainage in the collection chamber. Mark the time and fluid level on the chamber. Sudden increases in bloody drainage (e.g., >100 mL/hr) can signal fresh hemorrhage. A change from serosanguinous to purulent fluid may indicate an infection like empyema.

The water seal chamber is your window into the pleural space. Assess for tidaling—the gentle rise and fall of the water level with respiration. Its absence may indicate the lung has fully re-expanded or that the tube is blocked. Assess for bubbling. Bubbling on inhalation signals an active air leak from the patient. To locate the source, momentarily clamp the tube close to the dressing (and only if protocol permits and no tension pneumothorax is suspected) and observe. If bubbling stops, the leak is from the patient. If it continues, the leak is in the system itself, requiring you to check all connections.

"Milking" or "stripping" the tubing is a controversial intervention used to dislodge clots. "Milking" involves compressing a short segment of tubing between your fingers and moving it toward the collection chamber. "Stripping" involves using a roller device to apply sequential compression along the length of the tube. This creates high negative pressure and is not routinely recommended due to risks of tissue damage. It should only be performed under a specific physician's order or unit protocol. The preferred method is to gently squeeze or "milk" short segments only if visible clots are obstructing flow.

Recognizing and Responding to Critical Complications

Your ability to recognize complications swiftly is paramount. Tension pneumothorax is a life-threatening emergency where air enters the pleural space but cannot escape, building positive pressure. This collapses the lung, shifts the mediastinum, and compresses the great vessels, leading to cardiovascular collapse. Signs include acute respiratory distress, tracheal deviation away from the affected side, absent breath sounds, distended neck veins, and hypotension. The immediate treatment is to release the pressure; if the chest tube is already in place but clamped or blocked, you must unclamp it immediately. Otherwise, emergency needle decompression is required.

Other complications include subcutaneous emphysema (a crackling sensation under the skin from air tracking into tissues), tube dislodgement (cover the site immediately with a sterile occlusive dressing taped on three sides), tube obstruction (assess for kinks, clots, or dependent loops), and re-expansion pulmonary edema (a rare but serious complication if a large effusion or pneumothorax is drained too rapidly). Your systematic assessment is the first line of defense against these events.

Chest Tube Removal and Post-Removal Care

Removal is a sterile, two-person procedure typically performed by a clinician with a nurse assisting. Criteria for removal include resolution of the air leak (no bubbling in water seal), minimal drainage (<100-200 mL/24 hrs, depending on protocol), and radiological evidence of lung re-expansion. You will prepare the patient, administer analgesia as ordered, and set up a sterile field. During removal, the patient performs a Valsalva maneuver (exhaling against a closed glottis) or holds a deep breath at the clinician's command to create positive pleural pressure and prevent air from being sucked in during tube extraction. An occlusive dressing, such as petrolatum gauze covered by a sterile gauze and airtight tape, is applied immediately.

Post-removal, your monitoring intensifies. Assess the patient's respiratory status, vital signs, and oxygen saturation frequently. Listen for equal breath sounds and observe for any recurrence of symptoms. Check the dressing site for drainage, subcutaneous emphysema, or signs of infection. Instruct the patient to report immediate shortness of breath or chest pain. A follow-up chest X-ray is usually obtained to confirm the lung remains expanded.

Common Pitfalls

1. Mishandling the System: Lifting the drainage system above chest level is a critical error that can cause fluid reflux into the pleural space, risking infection or re-collapse. Correction: Always keep the unit vertically positioned and below the level of the patient's chest, including during transport.

1. Inadequate Assessment of Drainage: Simply noting "drainage present" is insufficient. Correction: Document the exact hourly or shift output volume, and describe its character (e.g., "serosanguinous," "frank blood," "purulent"). Trend this data meticulously, as a sudden change is a key clinical sign.

1. Misinterpreting Air Leaks: Assuming all bubbling indicates a patient leak can lead to unnecessary interventions or missed equipment problems. Correction: Systematically troubleshoot by momentarily clamping (if safe) to isolate the source—patient versus drainage system—before acting.

1. Poor Patient Preparation for Removal: Failure to coach the patient on the Valsalva maneuver can lead to air entry during tube extraction. Correction: Prior to the procedure, clearly explain and have the patient practice the maneuver ("bear down like you're having a bowel movement" or "try to blow out against your closed lips") to ensure they can perform it correctly on command.

Summary

• System Integrity is Paramount: Maintain an airtight, kink-free system with all connections secured and the collection unit always positioned below the patient's chest level.
• Your Assessment is Diagnostic: Meticulously monitor and document drainage amount and character. Use the water seal chamber to assess for tidaling and air leaks, and know how to systematically troubleshoot the source of bubbling.
• Tension Pneumothorax is an Emergency: Recognize the signs—severe distress, tracheal deviation, hypotension—and understand that immediate action to relieve pleural pressure (e.g., unclamping an obstructed tube) is required.
• Interventions Require Precision: Perform milking or stripping only per specific protocol. Assist with chest tube removal by ensuring proper patient instruction for the Valsalva maneuver and applying an immediate occlusive dressing.
• Patient-Centered Care Promotes Recovery: Manage pain effectively, promote mobility and lung expansion exercises, and provide clear education before and after tube removal to monitor for complications.