Lobectomy with One-Lung Ventilation (VATS or open)
Patient phenotype
Lung cancer or large nodule. Typically 55–80, smoker / ex-smoker, COPD often present, possibly reduced DLCO + FEV1. Consider preop pulmonary rehab + smoking cessation.
Procedure
Lateral decubitus position, video-assisted (VATS) or thoracotomy. Surgeon staples + divides bronchus + vessels of affected lobe. One-lung ventilation enables surgical exposure. ~2–4 hours.
Anesthetic plan
GETA with double-lumen tube (DLT) or bronchial blocker for lung isolation. Thoracic epidural OR paravertebral block for postop analgesia (huge difference in recovery). A-line + 2× large-bore PIV. Goal: extubate at end of case.
Setup
- ·Standard ASA + temp
- ·A-line (sometimes contralateral arm if surgical exposure issue)
- ·2× large-bore PIVs
- ·DLT 35-37 Fr female / 39-41 Fr male, fiberoptic bronchoscope to verify position
- ·Bronchial blocker (Univent or Arndt) as alternative or backup
- ·Bean bag or vac-pak for lateral position
- ·Thoracic epidural T4-T6 if no contraindication
- ·Type & screen 2 units (rare to need transfusion in routine VATS)
Biggest concerns by phase
Pulmonary risk stratification + ppoFEV1
Predicted postop FEV1 (ppoFEV1) > 40% = generally tolerates lobectomy. < 30% = very high risk, may need pneumonectomy assessment with VO₂ max. Continue bronchodilators day of surgery; smoking cessation > 4 weeks ideal.
Double-lumen tube placement + verification
Left-sided DLT preferred for most cases (right has variable RUL bronchus take-off). Place blindly past cords, rotate 90° toward target side, advance until resistance. Verify with fiberoptic bronchoscope: see carina + bronchial cuff, see RUL orifice if right DLT. Reverify after lateral positioning (10–25% migration rate).
Hypoxia during one-lung ventilation
Stepwise approach: 1) verify DLT position (most common cause), 2) suction blood/secretions, 3) increase FiO₂ to 100%, 4) PEEP 5-10 to ventilated lung, 5) CPAP 5 cm H₂O to non-ventilated lung, 6) intermittent two-lung ventilation, 7) clamp PA on operative side (surgeon).
Fluid management — restrictive
Excessive crystalloid → postpneumonectomy pulmonary edema (especially right pneumonectomy). Aim for 1–2 L total for routine lobectomy. Use vasopressors for hypotension instead of fluid bolus. Foley not always needed if short case.
Hypoxic pulmonary vasoconstriction (HPV)
Native protective response — non-ventilated lung's vessels constrict, redirecting blood to ventilated lung. INHALATIONAL ANESTHETICS BLUNT HPV at >1 MAC. TIVA (propofol + remifentanil) preserves HPV better — consider for severe one-lung hypoxia.
Extubation criteria + change DLT to single-lumen
Goal: extubate to spontaneous ventilation in OR. If postop ventilation needed, change DLT → single-lumen 8.0 cuffed via tube exchanger (avoid blind rapid extubation/reintubation in patient with bronchial stump). Sit up to 30°.
Postop pain — epidural / paravertebral makes the difference
Thoracotomy is one of the most painful incisions. Effective epidural / PVB → patient takes deep breaths, mobilizes early, less pneumonia + atelectasis + chronic pain. Multimodal: APAP + NSAID + gabapentin + epidural local + epidural opioid.
Mock-defense scenarios
Practice answering these out loud. The probes show what an examiner is listening for.
VATS lobectomy, patient is in lateral decubitus, you're 30 min into one-lung ventilation. SpO₂ drops from 97 to 84 on FiO₂ 1.0. ETCO₂ is 38. What's your stepwise approach?
What an examiner probes for
- ▹Verifies DLT position with fiberoptic before any other intervention
- ▹Suction + recruitment maneuver to ventilated lung
- ▹PEEP 5-10 to ventilated lung first, then CPAP 5 to non-ventilated
- ▹Asks surgeon to clamp PA on operative side if persistent
- ▹Considers TIVA conversion to preserve HPV
Right upper lobectomy, you're using a left-sided DLT. After surgical exposure, the surgeon says they can't get the upper lobe out — there's still ventilation to that segment. What's wrong?
What an examiner probes for
- ▹Suspects DLT migrated proximal — bronchial lumen no longer in left main
- ▹Verifies with fiberoptic bronchoscope
- ▹Re-positions DLT (advance under direct vision)
- ▹Anticipates: patient may need re-positioning, recheck position frequently
Sources
- Miller's Ch 64 (thoracic anesthesia)
- Slinger Principles & Practice of Anesthesia for Thoracic Surgery
- ERAS Society Thoracic
Anatomy reference
Sourced reference images. 4 matches for "lung pulmonary respiratory bronchi".
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