Post-Arrest Transfer: Destination and Hemodynamics
A 61-year-old woman collapsed at home. Bystander CPR started within 4 minutes, and ROSC was achieved after 14 minutes of resuscitation for ventricular fibrillation. She is intubated, sedated and paralyzed, with a GCS of 5. Vital signs: BP 84/50, HR 116 in sinus tachycardia, SpO2 93% on FiO2 0.60, temperature 35.2°C. Norepinephrine runs at 10 mcg/min through a 20-gauge peripheral IV in the forearm. She is at a community hospital at sea level. The nearest PCI-capable center is 40 minutes by helicopter with a cabin altitude of 1,500 ft. A closer hospital has a catheterization lab but no intensive care bed and is 15 minutes away by ground. Ground transport to the PCI center would take 2 hours 10 minutes.
1. Where do you take her, and what has to be true before you lift?
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Destination: the PCI-capable center by air. The 15-minute ground option is a trap. She arrested in VF with no obvious non-cardiac cause. The intervention that changes her outcome is an immediate coronary angiogram, and a hospital without an ICU bed will simply start a second transfer. Two hours by ground is not acceptable.
What must be true before you lift:
- Airway: tube confirmed, waveform capnography in place, ETCO2 35–45 mmHg. Hyperventilation lowers cerebral perfusion pressure; hypoventilation raises intracranial pressure.
- Perfusion: a MAP of at least 65. At 84/50 she is marginal. A second pressor should be drawn up and available, and a single 20-gauge peripheral line carrying norepinephrine at 10 mcg/min is an extravasation risk - consider a second line or an IO before departure.
- Oxygenation: SpO2 94–98%, not 100%. At a 1,500 ft cabin altitude her 93% on 0.60 will get worse, so plan to titrate rather than be surprised in flight.
- Temperature: she is at 35.2°C. Keep her there deliberately; do not let the cabin warm her passively without a plan.
2. During ascent her SpO2 falls to 88% and her MAP drops to 58. Walk through your response.
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Use a structured approach, and resist the reflex to only turn up the oxygen.
- Airway and breathing - DOPES: displacement, obstruction, pneumothorax, equipment failure, stacking. After 14 minutes of CPR she is at real risk for rib fractures and a pneumothorax. Check breath sounds and chest rise, and be ready to needle-decompress on the side you believe.
- Oxygen: increase FiO2, but recognize the desaturation may be a cardiac output problem, not a lung problem. A falling MAP with a falling saturation points to pump failure or an obstructive cause, and no amount of oxygen fixes that.
- Ask the pilot for a lower cabin altitude. A specific, brief request tied to a patient need, not a general worry.
- Do not hyperventilate to chase the saturation. Keep ETCO2 in the 35–45 range.
- Notify the receiving center that she is unstable so the cath lab and the intensivist are ready.
3. Twenty minutes into the flight her MAP is 52 despite norepinephrine at 20 mcg/min. What is your differential and what do you do?
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Differential first, action second. Think of the causes you can actually address in flight:
- Tamponade - a common cause of post-arrest obstructive shock and easily missed.
- Pneumothorax from CPR.
- Hemorrhage from compressions (liver, spleen) or a groin complication.
- Recurrent ischemia and severe acidosis.
- The basics: is the line infiltrated, is the pump running, is the cuff or the transducer wrong?
Actions:
- Assess with ultrasound if you carry it.
- Give a cautious fluid bolus if she is not volume overloaded, and add a second agent rather than escalating a single one indefinitely.
- Correct hypoxia and hypoventilation.
- Notify the receiving center and request priority handling on arrival.
If she arrests in flight, the crew manages the airway and compressions as the configuration allows, and the pilot's priority becomes the nearest suitable landing. Raise that possibility with the pilot early, not at the moment of arrest.