Introduction
The Pitt — Episode 4, tension pneumothorax scene:
"Sats are down to 85. BP's crashing — systolic's 82." — Nurse
"Tracheal deviation to the right. 14-gauge angiocath now." — Dr. Robby
"Who the hell ordered BiPAP?" — Dr. Garcia
"His sats were down. I did. I thought it would help." — Dr. Santos
The Wendell Stone scene in The Pitt Episode 4 is one of the most instructive examples of iatrogenic complication in the ER: a small, clinically stable pneumothorax that escalates to tension pneumothorax after BiPAP is applied without the attending physician's authorization. In seconds, the patient goes from acceptable saturation to imminent cardiovascular collapse — and resolution requires immediate needle decompression.
This scenario encapsulates one of the most important lessons in emergency medicine: not every hypoxic patient benefits from positive pressure. Knowing when it is contraindicated and acting swiftly when the complication occurs can literally be the difference between life and death.
What Is Iatrogenic Tension Pneumothorax?
Tension pneumothorax occurs when air enters the pleural space and cannot escape, creating a one-way valve mechanism. Rising positive intrathoracic pressure collapses the ipsilateral lung, shifts the mediastinum to the opposite side, compresses the heart, and obstructs venous return — culminating in cardiovascular collapse if not treated within minutes.
In the iatrogenic form, the cause is not external trauma but a medical intervention. Positive pressure ventilation — whether invasive (mechanical ventilator) or non-invasive (BiPAP, CPAP) — can convert a simple, stable pneumothorax into a tension pneumothorax by progressively forcing more air into the pleural space through a pre-existing pulmonary injury. This is exactly what happened to Stone: a pulmonary contusion with a small pneumothorax, clinically compensated, that decompensated when unauthorized positive pressure was applied.
Causes & Clinical Context
In the ER, the most common causes of iatrogenic tension pneumothorax include:
- Positive pressure ventilation with undrained pneumothorax: the leading cause — BiPAP, CPAP, or invasive mechanical ventilation without prior drainage
- Central venous access: especially subclavian or internal jugular, with inadvertent pleural laceration
- Transthoracic lung biopsy
- Intercostal or serratus anterior plane block with excessively deep needle insertion
- Barotrauma from mechanical ventilation: excessive tidal volumes or high PEEP in compromised lungs
Stone's case in The Pitt is a classic example of the first mechanism: chest trauma with a small stable pneumothorax, treated with serratus anterior plane block for analgesia — the correct decision — but then followed by BiPAP prescribed unilaterally by the resident without discussion with the attending, ignoring the relative contraindication of positive pressure in that context.
Signs & Symptoms
Tension pneumothorax is a clinical recognition emergency — you do not wait for a chest X-ray to act. The classic signs form the modified Beck's triad for pneumothorax:
- Progressive refractory hypoxia: SpO2 falling despite supplemental oxygen
- Sudden hypotension: systolic pressure plummeting — in Stone's case, reaching 82mmHg
- Unilateral absent breath sounds: collapsed lung on the affected side
- Contralateral tracheal deviation: a late and not always present sign, but highly specific — identified by Dr. Robby in the episode
- Jugular venous distension: from obstructed venous return — may be absent in hypovolemic patients
- Pulsus paradoxus and tachycardia
In patients on mechanical ventilation or BiPAP, the earliest sign is often a sudden rise in airway pressure associated with falling saturation and hypotension.
Diagnosis
The diagnosis of tension pneumothorax is clinical and immediate. Waiting for radiological confirmation while the patient is hemodynamically unstable is a potentially fatal error. Point-of-care ultrasound (POCUS) can confirm absence of pleural sliding in seconds and is preferable to X-ray in extreme urgency situations.
In the RUSH protocol (Rapid Ultrasound for Shock and Hypotension), unilateral absent pleural sliding with unexplained hypotension should prompt immediate decompression without waiting for any additional workup. Chest X-ray is only useful for stable patients with diagnostic suspicion, never in the hypertensive emergency.
Emergency Treatment
Treatment follows a strict, no-delay sequence:
- Immediate clinical recognition: hypoxia + hypotension + unilateral absent breath sounds = act now
- Stop positive pressure ventilation: disconnect BiPAP or immediately reduce ventilatory support
- Needle decompression: 14-gauge angiocath at the 2nd intercostal space, midclavicular line, superior rib border — or at the 4th/5th intercostal space, anterior axillary line (more reliable in obese patients)
- Confirm air escape: the audible hissing of escaping air confirms the diagnosis and successful decompression
- Definitive chest drainage: pigtail catheter or 28-32F chest tube after hemodynamic stabilization — as performed by Dr. Robby in the episode
- Continuous monitoring: SpO2, blood pressure, heart rate — reassessment every 5 minutes until stabilization
- Confirmatory chest X-ray after the procedure, never before
In the episode, Dr. Robby opts for the pigtail catheter over a conventional chest tube, reasoning that the pneumothorax — though now under tension — was originally small and does not require large-bore drainage after the relief decompression.
Prognosis & Complications
When promptly recognized and treated, tension pneumothorax has an excellent prognosis — needle decompression reverses the condition within seconds. Delayed recognition is the leading cause of preventable death in this condition.
Possible complications include:
- Failed needle decompression: needle too short in obese patients — prefer anterior axillary line or use an 8cm needle
- Residual pneumothorax after pigtail: may require larger-bore drainage
- Associated hemothorax: especially in trauma — may require additional drainage
- Intercostal vessel injury: always puncture over the superior rib border to avoid the neurovascular bundle
- Recurrence if the underlying cause is not treated: positive pressure ventilation must be avoided or initiated only after adequate drainage
Frequently Asked Questions
Is every patient with pneumothorax contraindicated for BiPAP?
Not absolutely, but an undrained pneumothorax is an important relative contraindication to positive pressure ventilation. The decision must be individualized: a small stable pneumothorax in a patient who does not need ventilation can be monitored. If positive pressure ventilation is unavoidable — as in severe respiratory failure — the pneumothorax must be drained first. Dr. Santos' error in The Pitt was prescribing BiPAP without discussing it with the attending and without first draining the pneumothorax.
How do you differentiate simple from tension pneumothorax at the bedside?
Simple pneumothorax causes discomfort, pleuritic pain, and reduced breath sounds, but without hemodynamic instability. Tension adds progressive hypotension, tachycardia, refractory hypoxia, and tracheal deviation. In any patient with pneumothorax who deteriorates hemodynamically — especially under positive pressure ventilation — tension pneumothorax should be the presumed diagnosis until proven otherwise.
Why did Dr. Robby choose the pigtail catheter over a conventional chest tube?
The pigtail catheter (8-14Fr) is less invasive than a conventional chest tube (28-32Fr), causes less pain, and has equivalent efficacy for uncomplicated pneumothorax. In Stone's case, the pneumothorax was originally small — only enlarged by positive pressure. After needle relief decompression, the pigtail was sufficient to drain the residual air. For large hemothorax or thick pleural effusion, larger-bore drainage remains necessary.
What to do if needle decompression fails to resolve the situation?
If needle decompression does not result in air escape and hemodynamic improvement, there are two possibilities: the needle is too short (did not reach the pleural space) or the diagnosis is wrong. In that case, try a second puncture site (anterior axillary line) or proceed immediately with chest tube insertion. Alternative diagnoses to consider include cardiac tamponade and massive pulmonary embolism.
Conclusion
Stone's case in The Pitt is a perfect teaching scenario: it illustrates the iatrogenic risk of positive pressure in an undrained pneumothorax, the immediate clinical recognition without waiting for imaging, needle decompression as a life-saving maneuver, and definitive drainage with a pigtail catheter. Beyond the technique, the episode teaches about safety culture in the ER: every order must be discussed with the responsible physician before being executed.
See also our articles on Cardiac Tamponade and Thoracotomy and Surgical Airway Emergency in our Emergency Scenarios category.
This content is for educational purposes only and does not substitute professional medical evaluation, diagnosis, or treatment. In case of emergency, call 911 immediately.
