Chest Tube And Drainage Device Care

SECTION 1

Historical Context & Motivation

The development of chest tube drainage is intimately tied to humanity's understanding of pleural space physiology and the devastating consequences of pneumothorax and hemothorax. For centuries, clinicians observed that air or fluid accumulating in the pleural cavity could collapse a lung and threaten life, yet they lacked safe, reliable means of evacuating these collections. Early attempts at thoracic drainage were crude and often introduced infection, but the urgency of battlefield injuries and epidemic disease drove relentless innovation. The story of the chest tube is, in many ways, a story of nursing and surgical collaboration—where careful bedside monitoring proved just as critical as the procedure itself.

1876

Bülau Closed Drainage

Gotthard Bülau introduced the first closed underwater seal drainage system for empyema treatment, establishing the foundational principle that air must not re-enter the pleural space during drainage.

1917–1918

World War I Applications

Wartime surgeons adapted Bülau's technique for traumatic hemothorax and tension pneumothorax, demonstrating that early chest drainage dramatically reduced mortality among soldiers with penetrating thoracic wounds.

1960s

Three-Bottle System Standardized

The classic three-bottle drainage system (collection, water seal, suction control) became the standard teaching model, giving nurses and physicians a clear conceptual framework for managing chest tube drainage.

1967

Compact Disposable Units

The Pleur-evac® and similar commercially available disposable chest drainage units consolidated the three-bottle concept into a single portable device, simplifying setup and reducing infection risk.

2000s–Present

Digital Drainage Systems

Modern digital chest drainage systems provide continuous monitoring of air leak volume and intrapleural pressure, enabling earlier and safer chest tube removal based on objective data rather than subjective assessment alone.

The central question that this lesson addresses is: How does the practical nurse safely manage a patient with a chest tube, maintain the integrity of a closed drainage system, and recognize complications that demand immediate intervention? Understanding these principles is essential not only for NCLEX-PN preparation but also for delivering competent, life-preserving bedside care in any acute care setting.

SECTION 2

Core Principles & Definitions

Chest tube management rests upon a firm understanding of negative intrapleural pressure and the physiology of lung expansion. Under normal conditions, the pleural space between the visceral and parietal pleurae maintains a subatmospheric pressure of approximately −4 to −8 cmH₂O, which keeps the lungs inflated against the chest wall. When this seal is broken—by trauma, surgery, or disease—air (pneumothorax), blood (hemothorax), or other fluid (pleural effusion) can enter the space, collapsing the lung and compromising gas exchange. A chest tube re-establishes the pressure differential by evacuating the offending material through a closed drainage system that prevents atmospheric air from re-entering the pleural cavity.

Closed Drainage System

A sealed apparatus connecting the chest tube to a collection device with a water-seal chamber that acts as a one-way valve, allowing air and fluid to exit the pleural space while preventing backflow.

Water-Seal Chamber

A compartment filled with sterile water to a level of 2 cm. Air bubbles through this water on exhalation, confirming egress from the pleural space. Continuous vigorous bubbling suggests an air leak.

Suction Control Chamber

When wall suction is ordered, this chamber (set to −20 cmH₂O typically) regulates the degree of negative pressure applied to the pleural space, promoting lung re-expansion without excessive force.

Tidaling

The normal fluctuation of the water level in the water-seal chamber with respiration. The fluid rises during inspiration and falls during expiration in spontaneously breathing patients. Absence of tidaling may indicate tube obstruction or full lung re-expansion.

Drainage Collection Chamber

Calibrated compartment that collects fluid draining from the pleural space. Output is measured and documented, with volumes exceeding 200 mL/hour requiring immediate provider notification.

✦ KEY TAKEAWAY

Think of the chest drainage system as a one-way door for unwanted guests in the pleural space. Air and fluid can leave through the door (the water seal), but the water barrier prevents anything from walking back in. Just as you would never prop that door open or disconnect it, you must never open the drainage system to atmosphere—doing so would immediately allow air to rush back into the pleural space and potentially collapse the lung.

SECTION 3

Visual Explanation — The Chest Drainage System

The three-chamber chest drainage system: fluid and air drain from the patient's pleural space into the collection chamber (left), pass through the water-seal chamber (center), and negative pressure is regulated by the suction control chamber (right) connected to wall suction. The water seal at 2 cm H₂O serves as the one-way valve preventing atmospheric air from re-entering the pleural space.

As illustrated in the diagram above, the three chambers work in sequence to achieve safe, effective drainage. The collection chamber receives fluid and air directly from the chest tube. This chamber is calibrated so that nurses can accurately measure and trend output over time. The water-seal chamber is the heart of the system—its 2-cm column of sterile water creates a one-way valve that permits air to escape the pleural space (visible as bubbles) during exhalation while preventing atmospheric air from entering during inhalation. Tidaling—the rhythmic rise and fall of water in this chamber with respiration—is a normal and expected finding that confirms system patency. The suction control chamber limits the amount of negative pressure transmitted to the pleural cavity. Its water level (commonly set at −20 cmH₂O) determines the maximum suction regardless of how high the wall suction is dialed, and gentle, continuous bubbling in this chamber indicates that suction is functioning correctly.

SECTION 4

How It Works — Physiology & Nursing Interventions

Pleural Pressure Physiology

Normal respiratory mechanics depend on the maintenance of negative intrapleural pressure. During quiet inspiration, the diaphragm contracts and the thoracic cavity expands, lowering intrapleural pressure to approximately −8 cmH₂O. This pressure gradient pulls the visceral pleura (and the lung) outward against the parietal pleura, drawing air into the alveoli. When air or fluid accumulates in the pleural space, this negative pressure is disrupted—partially or completely—and the affected lung collapses. The chest tube and drainage system restore negative intrapleural pressure by evacuating the offending material and sealing the space from the atmosphere.

INTRAPLEURAL PRESSURE RANGE

P_ip ≈ −4 to −8 cmH₂O (normal quiet breathing)

P_ip = intrapleural pressure. This value becomes more negative during deep inspiration (down to −12 cmH₂O or lower). The chest tube system must maintain a negative pressure gradient to facilitate lung re-expansion.

Essential Nursing Interventions

The practical nurse's responsibilities in chest tube care span assessment, maintenance, and emergency response. First, maintain the system below the level of the patient's chest at all times to ensure gravity-assisted drainage and prevent retrograde flow of fluid back into the pleural space. The tubing should be positioned to avoid dependent loops, which can trap fluid and increase resistance to drainage, effectively creating an obstruction. Second, the nurse must assess the water-seal chamber regularly: intermittent bubbling during exhalation or coughing is normal in a patient with a pneumothorax, whereas continuous, vigorous bubbling suggests an air leak in the system that needs investigation. Third, the insertion site dressing—typically an occlusive petrolatum gauze or similar barrier—should be assessed for intactness, subcutaneous emphysema, and signs of infection at least every shift.

⚠️ CRITICAL SAFETY RULE

Never clamp a chest tube unless specifically ordered by the provider for brief, monitored intervals (such as during a trial before removal) or unless you are troubleshooting an air leak by systematically clamping along the tubing to locate the source. Clamping a chest tube in a patient with an active air leak can rapidly produce tension pneumothorax—a life-threatening emergency characterized by tracheal deviation, severe hypotension, and absent breath sounds on the affected side.

If the drainage system is accidentally disconnected or the bottle breaks, the immediate nursing action is to place the distal end of the chest tube into a container of sterile water (approximately 2 cm deep) to re-establish a temporary water seal while a new drainage unit is set up. If the chest tube is accidentally dislodged from the patient, apply an occlusive dressing taped on three sides over the insertion site. Taping three sides creates a flutter-valve effect: air can escape the pleural space through the untaped side during exhalation, but the dressing seals against the chest wall during inhalation, preventing atmospheric air from entering. The nurse should then notify the provider immediately and monitor for signs of respiratory distress.

SECTION 5

Detailed Assessment & Troubleshooting

This flowchart guides the practical nurse through systematic assessment of a chest tube and drainage system. Begin by checking for tidaling (confirms patency), evaluate for continuous bubbling (indicates air leak), and monitor drainage volume (excessive output warrants immediate provider notification).

Key Assessment Findings & Their Significance

Summary of key chest tube assessment findings, their significance, and appropriate nursing responses

Assessment Finding	Normal or Abnormal	Nursing Action
Tidaling in water-seal chamber	Normal	Continue monitoring; confirms system patency and pleural communication
Intermittent bubbling in water seal with coughing/exhalation	Normal (for pneumothorax patients)	Document and monitor; air is being evacuated from the pleural space
Continuous vigorous bubbling in water seal	Abnormal	Check all connections for leaks; notify provider; do NOT clamp tube
Absence of tidaling	Investigate	May indicate lung re-expansion (good) or tube obstruction (bad); assess breath sounds and ask patient to cough
Drainage > 200 mL/hour (sanguineous)	Abnormal	Notify provider immediately; possible hemorrhage; monitor vital signs for hypovolemic shock
Subcutaneous emphysema at insertion site	Abnormal	Notify provider; may indicate tube malposition or inadequate drainage of air
Gentle continuous bubbling in suction control chamber	Normal	Confirms suction is functioning at the prescribed level; if absent, check wall suction connection

SECTION 6

Worked Example — Clinical Scenario

The following clinical scenario demonstrates the systematic approach a practical nurse should take when managing a patient with a chest tube. Work through each step carefully, noting how assessment findings guide decision-making.

Scenario: Postoperative Thoracotomy Patient with Chest Tube

Step 1 — Review the Clinical ContextMr. Alvarez, 62 years old, is 6 hours post-left thoracotomy for lobectomy. He has a left-sided chest tube connected to a closed drainage system with −20 cmH₂O suction. The nurse arrives for the hourly assessment and notes that the patient reports increased shortness of breath. SpO₂ is 90% on 4 L nasal cannula (was 95% one hour ago), respiratory rate is 26, heart rate is 108, and blood pressure is 142/88. The nurse recognizes that these vital sign changes warrant a thorough chest tube system evaluation.

Clinical concern: worsening respiratory status suggests a possible complication related to the chest tube or the surgical site.

Step 2 — Inspect the Drainage SystemThe nurse checks the drainage unit, ensuring it remains below the level of the patient's chest and in an upright position. The tubing is traced from the insertion site to the drainage unit. A dependent loop of approximately 30 cm is found in the tubing hanging below the bed rail. The nurse gently lifts the tubing to straighten the loop, allowing trapped fluid to drain into the collection chamber.

Dependent loop identified and corrected—this may have been impeding drainage.

Step 3 — Assess the Water-Seal ChamberAfter straightening the tubing, the nurse observes the water-seal chamber. Tidaling is now visible—the water level fluctuates with respirations. Intermittent bubbling is present during exhalation and coughing. The nurse notes that the water level is at the 2-cm mark, which is appropriate. No continuous vigorous bubbling is observed, so there is no evidence of a system air leak.

Water-seal assessment: patent system with normal tidaling and expected intermittent bubbling. No air leak.

Step 4 — Evaluate Drainage OutputThe nurse marks the current fluid level on the collection chamber with the time. In the past hour, 150 mL of sanguineous drainage has accumulated, bringing the total 6-hour output to 480 mL. While the hourly output is below the 200 mL/hour threshold for immediate notification, the nurse recognizes that this is a moderate amount and should be trended over the next hour. The drainage color is dark red, which is expected postoperatively.

Drainage: 150 mL/hour (sanguineous) — within acceptable limits but requires close monitoring.

Step 5 — Reassess the Patient and DocumentFollowing correction of the dependent loop, the nurse repositions the patient to semi-Fowler's position to promote lung expansion and facilitates deep breathing exercises. After 15 minutes, the SpO₂ improves to 93%, respiratory rate decreases to 22, and Mr. Alvarez reports slightly less dyspnea. The nurse documents all findings—vital signs, system assessment, loop correction, drainage volume and character, and the patient's response. The nurse plans to reassess in 30 minutes and will notify the provider if the SpO₂ does not continue to improve or if drainage output increases.

Outcome: respiratory status improving after intervention. Continue close monitoring with plan for escalation if needed.

SECTION 7

Types of Chest Tubes & Drainage Systems Compared

Not all chest tubes or drainage devices are identical. The choice of tube size, placement location, and drainage system depends on the clinical indication. Understanding these distinctions helps the practical nurse anticipate the expected drainage characteristics and recognize when findings deviate from what is appropriate for a given situation.

Comparison of large-bore and small-bore chest drainage catheters

Feature	Large-Bore Chest Tube (28–40 Fr)	Small-Bore Pigtail Catheter (8–14 Fr)
Common Indications	Hemothorax, large pleural effusions, empyema, post-thoracotomy	Simple pneumothorax, small to moderate pleural effusions
Insertion Method	Blunt dissection (open technique) through intercostal space	Seldinger technique (guidewire), often image-guided
Drainage Capacity	High; effective for viscous fluids and blood	Lower; may occlude with thick or bloody drainage
Patient Comfort	More painful at insertion site; requires adequate analgesia	Generally better tolerated; less chest wall trauma
Nursing Consideration	Monitor for large-volume output; secure with suture and dressing	Monitor for kinking and clogging; may require flushing per protocol

✦ KEY TAKEAWAY

Think of the difference between a large-bore and small-bore chest tube like the difference between a garden hose and a drinking straw. Both can move water, but if the fluid is thick (like blood or pus), the narrow straw will clog far more easily. This is why hemothorax and empyema require large-bore tubes, while simple pneumothorax can often be managed with a smaller pigtail catheter. The principle applies to nursing assessment as well—a small-bore tube with suddenly absent drainage should raise suspicion for occlusion, whereas a large-bore tube with the same finding more likely indicates lung re-expansion or kinking.

SECTION 8

Complications & Advanced Considerations

While chest tubes are life-saving devices, they carry inherent risks that the practical nurse must anticipate and monitor for. The most critical complication is tension pneumothorax, which can occur if the tube becomes obstructed or clamped in a patient with a persistent air leak. Other complications include infection at the insertion site, accidental dislodgement, re-expansion pulmonary edema (which may occur when a chronically collapsed lung is rapidly re-inflated), and organ injury during insertion. Understanding the relationship between chest tube management and these potential complications positions the practical nurse to intervene early and effectively.

Chest tube complications with corresponding nursing actions

Complication	Signs & Symptoms	Immediate Nursing Action
Tension Pneumothorax	Tracheal deviation away from affected side, hypotension, jugular venous distension, absent breath sounds, tachycardia, cyanosis	Unclamp tube immediately if clamped; call provider stat; prepare for needle decompression if ordered
Accidental Dislodgement	Tube visible outside the chest; sudden air rushing sound; acute respiratory distress	Apply occlusive dressing taped on three sides; monitor vitals; notify provider immediately
System Disconnection	Tubing separated at junction; loss of water-seal integrity; air entering system	Submerge the chest tube end in sterile water (2 cm); reconnect or replace system; notify provider
Re-expansion Pulmonary Edema	Persistent cough, pink frothy sputum, worsening dyspnea after lung re-expansion, crackles on auscultation	Elevate HOB; administer supplemental O₂; notify provider; may require clamping tube briefly if ordered
Hemorrhage (excessive drainage)	Sanguineous output > 200 mL/hour; tachycardia; hypotension; pallor	Notify provider stat; prepare for possible return to OR; maintain IV access; type and crossmatch

Looking ahead, the practical nurse should be aware that advanced practice involves interpreting digital chest drainage system data, managing patients with multiple chest tubes after complex thoracic surgeries, and participating in the assessment criteria for chest tube removal. The criteria for removal typically include resolution of the air leak (no bubbling in water seal for 24–48 hours), drainage less than 150–200 mL per 24 hours, and radiographic evidence of lung re-expansion. The LPN/LVN supports this process by providing accurate, timely documentation of drainage trends and assessment findings that guide the provider's decision.

SECTION 9

Practice Problems

PROBLEM 1 — CONCEPTUAL

A patient with a left-sided chest tube has a water-seal chamber that shows tidaling with respiration. The nurse notices the water level rises during inspiration and falls during expiration. What does this finding indicate, and why is it clinically significant?

PROBLEM 2 — BASIC CALCULATION

A postoperative patient's chest tube drainage is documented as follows: 0600—75 mL, 0700—90 mL, 0800—110 mL, 0900—145 mL, 1000—210 mL. At what time should the nurse have notified the provider, and what is the total drainage output over this 5-hour period?

PROBLEM 3 — INTERMEDIATE

During a night shift assessment, the practical nurse finds that a patient's water-seal chamber shows continuous vigorous bubbling rather than the intermittent bubbling noted on the previous shift. All tubing connections appear tight. The patient's respiratory status is stable. What should the nurse do next, and what are the possible causes?

PROBLEM 4 — APPLIED

A patient is being ambulated to the bathroom when the chest tube drainage unit is accidentally knocked over and cracks, spilling the water-seal fluid onto the floor. The chest tube is still connected to the broken unit. Describe the nurse's priority actions in the correct sequence.

PROBLEM 5 — CRITICAL THINKING

A practical nurse is caring for two patients in adjacent rooms. Patient A has a chest tube for a right spontaneous pneumothorax; the water-seal chamber shows no tidaling and no bubbling, and the most recent chest X-ray shows full lung re-expansion. Patient B has a chest tube for a left hemothorax post-motor vehicle accident; the water-seal chamber shows no tidaling and no bubbling, but the collection chamber shows no new drainage for the past 3 hours, and the patient is increasingly tachycardic and hypotensive. Compare the significance of identical water-seal findings in these two patients and explain how the nurse should respond differently.

SUMMARY

Summary — Chest Tube & Drainage Device Care

Chest tube and drainage device care is a critical competency for the practical nurse caring for patients with pneumothorax, hemothorax, or pleural effusion. The closed drainage system functions through three integrated chambers: the collection chamber (collects fluid, calibrated for measurement), the water-seal chamber (one-way valve at 2 cmH₂O preventing air re-entry), and the suction control chamber (regulates negative pressure, typically −20 cmH₂O). Normal assessment findings include tidaling in the water-seal chamber and gentle bubbling in the suction control chamber when suction is applied.

Key nursing priorities include maintaining the system below chest level, preventing dependent loops in the tubing, never clamping the tube without a provider order, and recognizing that continuous vigorous bubbling signals an air leak while drainage exceeding 200 mL/hour demands immediate provider notification. Emergency responses include submerging a disconnected tube in sterile water and applying a three-sided occlusive dressing if the tube is accidentally dislodged. Always interpret assessment findings within the patient's clinical context—the same water-seal appearance can mean lung re-expansion in one patient and tube obstruction in another.