Bronchopleural fistula
Stem
A 67-year-old man, 74 kg, is nine days out from a right pneumonectomy for squamous cell carcinoma. He now has fever, a cough productive of large volumes of thin serosanguinous fluid that worsens when he lies on his left side, and an SpO2 of 90% on 4 L of nasal oxygen. The chest radiograph shows the fluid level in the right hemithorax has fallen, and bronchoscopy confirms a stump dehiscence. He is booked for stump repair.
Question
How will you induce anesthesia and secure his airway?
Ideal answer
HeadlineThe fistula is a direct path from the infected space into his only lung: I protect the left lung and avoid positive pressure until it is isolated.1
- Chest tube first, open and draining through induction, never clamped, so any positive pressure I deliver can escape.1
- Sitting up, leaning toward the operated side, so fluid stays in the right chest.
- Spontaneous breathing until the left lung is isolated.1 Awake with topical anesthesia and light sedation, or a careful inhalational induction.
- Left double-lumen, or single-lumen into the left bronchus, to seal the healthy lung off; fiberoptic guidance, and instruments stay clear of the stump, because the stump is the problem.
- Confirm isolation, suction the left lung, then relaxant. Only then do I ventilate the left lung.
Watch for: Air leak on the chest tube, saturation, and blood pressure, because he may be septic.
Breaking down the answer
- Two dangers, one rule — positive pressure through the fistula worsens the leak and can create tension physiology, and with empyema it spills infected fluid into the healthy lung.1
- Why drain first — a chest tube on suction during induction stops pressure building in the space;1 without one, a single positive-pressure breath can tension the right chest. In a pneumonectomy space, gentle suction only, because strong suction can shift the mediastinum.
- Isolation options — a double-lumen tube, bronchial intubation with a single-lumen tube, or a bronchial blocker.1 After pneumonectomy I want the tube in the remaining main bronchus, not a blocker near the stump.
- Expect it after pneumonectomy — incidence is 1.5–4.5% after pneumonectomy and 0.5–1% after lobectomy, usually within 2 weeks;1 right-sided resections carry more risk.2 Diabetes, COPD, neoadjuvant treatment and prolonged ventilation add to it.2
- Recognize it — dyspnea, hypotension, subcutaneous emphysema, purulent sputum, a persistent air leak, and a falling fluid level on the radiograph.3
Follow-up question
After repair he stays ventilated in the ICU. The ventilator shows an inspired tidal volume of 500 mL and an expired volume of 260 mL, the chest tube bubbles continuously, and his PaCO2 is 68 mmHg. How do you ventilate him?
Follow-up answer
HeadlineA large recurrent fistula: the inspired-expired difference is the leak, and PEEP is lost with it.1 I call the surgeon: bronchoscopy, likely reoperation.
Flow through the fistula depends on transpulmonary pressure, so I use the lowest mean airway pressure that keeps him oxygenated: smaller tidal volumes, a short inspiratory time, the least PEEP I can use and fewer breaths, accepting permissive hypercapnia.1 The chest tube goes to water seal if it is tolerated, and I treat infection. High-frequency jet ventilation is now a niche option, and venovenous ECMO is the rescue if gas exchange fails.1 I reassess the leak volume, gases and hemodynamics after each change.
Pitfalls that cost points
- Placing a blocker in the bronchus that leads to the fistula and calling it isolation.
- Chasing normocapnia with higher pressures and enlarging the leak.
Rapid-fire
Q: How do you confirm a fistula at bronchoscopy? A: By a visible mucosal defect, bubbles under saline, or methylene blue instilled into the pleura appearing in the airway.1
Q: How long can a post-operative air leak last before you suspect a fistula? A: More than 24 hours.1
Q: When does surgical closure work best? A: Within 2 weeks of the original operation, often with a vascularized flap.1
Q: What closes small fistulae without surgery? A: Endobronchial sealants or valves for defects under 5 mm; stents or occluder devices for larger central ones.1
Q: How lethal is a post-lobectomy fistula? A: Reported mortality ranges from 14% to 18.2%.2
Numbers to know
| Item | Value |
|---|---|
| Incidence after pneumonectomy | 1.5–4.5% (up to 20% cited)1 |
| Incidence after lobectomy | 0.5–1%1 |
| Typical onset | Within 2 weeks1 |
| Air leak suspicious for a fistula | >24 h1 |
| Leak resolving on water seal | ~60%1 |
| CT localizes fistula | 55%1 |
Links
Sources
- 1.Bronchopleural Fistula · OpenAnesthesia (IARS), 2026 · openanesthesia.orgLast updated 01/13/2026; incidence, diagnosis, induction and ventilation strategy, treatment.
- 2.Surgical strategy for closure of postoperative bronchopleural fistula: a narrative review · Journal of Thoracic Disease, 2026 · ebi.ac.ukFull text via Europe PMC (PMC13559394); right-sided and pneumonectomy risk, risk factors, post-lobectomy BPF mortality.
- 3.Bronchopleural fistula · NYSORA · nysora.comPresentation and diagnostic tests.
Facts on this page were checked against these sources on Oct 16, 2026. Guidelines change; confirm doses against current institutional protocols.