Guide — Transport Respiratory Care
Airway Management During Transport
The airway you leave with is the airway you arrive with — re-intubation in a moving vehicle or cramped aircraft is a last resort. This guide is about prevention: secure before departure, confirm with capnography continuously, and run DOPE the instant the waveform changes.
7 min read · Transport Respiratory Care
Written by Apex Respiratory Editorial Team
Educational use only. This material supports respiratory therapy education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional protocols, or physician orders. Always follow facility policies and current provider orders, and verify calculations independently before clinical use.
Overview
In transport, airway management is dominated by one idea — prevention. The ability to rescue a lost airway in a moving ambulance or a cramped aircraft is severely limited: the team is small, the space is confined, lighting is poor, and the vehicle may be moving. Every resource that would be available in an emergency department or ICU — additional hands, video laryngoscopy on a boom arm, a surgical team on standby — is either absent or delayed.
The practical consequence is that airway decisions must happen before the patient leaves the sending facility. An airway that is definitive, secured, and confirmed with waveform capnography before departure is one that can be continuously monitored in transit rather than urgently rescued. The respiratory therapist’s role in transport is to ensure that standard is met and maintained from departure through handoff.
Key Concepts
- Intubate before, not during. If there is meaningful doubt about airway stability for the duration, establish a definitive airway before leaving. Do not plan elective intubation en route. The threshold for pre-departure intubation should be lower than in the ICU because the rescue capability is also lower.
- Confirm placement before departure.Documentation should include tube depth (cm at the lip), bilateral breath sounds confirmed, and — definitively — a normal waveform capnography tracing with a quantitative ETCO₂ reading.
- Continuous waveform capnography in transit. Capnography is the fastest and most reliable detector of tube displacement, disconnection, and obstruction. A sudden loss of the ETCO₂ waveform is a dislodged tube until proven otherwise and should trigger the DOPE assessment immediately.
- Altitude alters cuff physiology. An air-filled cuff expands as barometric pressure drops during air transport. Managing cuff contents (saline fill or continuous pressure monitoring) is a transport-specific airway skill.
- Backup airway always present. Every transport involving an intubated patient requires a full backup airway kit: laryngoscope with video option, range of ETT sizes, a supraglottic rescue airway (LMA or King LT), bag-valve-mask, and a surgical-airway option (at minimum a commercially prepared cricothyrotomy kit).
Assessment & Findings
Before departure, the RT should complete a systematic airway checklist. The sequence below applies whether the patient is already intubated on arrival or was just intubated in preparation for transport.
- Tube position and security.Confirm depth at the lip (typically 21–23 cm in adults), bilateral breath sounds without gastric sounds, and a square-wave ETCO₂ tracing. The tube should be secured with a commercial ETT holder or well-applied tape — not just loosely held.
- Cuff status.Measure cuff pressure with a manometer; target 20–30 cmH₂O. For air transport, note whether the cuff is air-filled or saline-filled and document the plan for altitude management.
- Suction availability. Verify that portable suction is charged, functional, and stocked with the correct catheter size for the tube in place.
- Backup airway kit inventory. Physically verify the presence of a supraglottic rescue airway, BVM with appropriate mask size, at minimum one alternative ETT (one size smaller), direct and/or video laryngoscope with confirmed battery, and a surgical-airway option.
- Oxygen supply duration. Calculate whether the O₂ supply (tank duration at the required flow and FiO₂) covers the estimated transport time plus a safety margin. Account for ventilator O₂ consumption, not just the flowmeter rate.
DOPE: Responding to Acute Deterioration
When an intubated patient acutely deteriorates in transit — rising peak pressures, falling SpO₂, loss of ETCO₂ waveform, or hemodynamic instability — DOPE provides a structured differential to work through rapidly. Each step has an immediate bedside check.
| Letter | Cause | Bedside Check & Action |
|---|---|---|
| D | Displacement | Check tube depth at the lip, listen over epigastrium, look for unilateral chest rise. |
| O | Obstruction | Suction the tube, inspect for kinking of the ETT or circuit, pass a suction catheter to confirm patency. |
| P | Pneumothorax | Auscultate both lung fields, assess for hypotension and jugular venous distension, prepare for needle decompression if clinical picture fits. |
| E | Equipment failure | Check all ventilator connections, circuit integrity, capnograph sensor placement, and oxygen source. Manually ventilate with BVM if in doubt. |
The standard sequence is D → O → P → E because displacement and obstruction are most common, but clinical findings may redirect the workup. A patient with absent unilateral breath sounds and hypotension after a transfer move goes straight to P. Do not assume equipment failure until displacement, obstruction, and pneumothorax are ruled out — equipment failure is a diagnosis of exclusion.
RT Priorities & Interventions
- Secure the tube thoroughly before departure. Use a commercial ETT holder when available. If tape is used, ensure it encircles the tube and adheres firmly to dry skin. Document the cm marking at the lip.
- Re-confirm position after every patient move. Lateral transfer to a cot, loading into the vehicle, and transfer to the receiving bed are all high-risk moments for tube displacement. After each move: check depth marking, auscultate, and visually confirm the capnography waveform.
- Keep capnography running for the entire transport. Attach the capnograph before departure and keep the waveform visible throughout. Set alarms for ETCO₂ and respiratory rate. Do not remove the sensor during vehicle loading.
- Manage the cuff for air transport.Fill with saline or monitor cuff pressure continuously and deflate as needed to maintain 20–30 cmH₂O as altitude increases. Re-check pressure during descent — cuff pressure will fall as pressure is regained and may drop below the sealing threshold.
- Run DOPE at any acute change. Sudden loss of ETCO₂ waveform, rising peak airway pressures, unexplained hypoxemia, or hemodynamic deterioration should all trigger the DOPE sequence immediately.
- Ensure suction is immediately accessible. Secretion management and the ability to rapidly clear the airway are just as critical in transit as in the ICU and must not be buried under equipment bags.
Never attempt intubation in a moving vehicle. Stop the vehicle or aircraft, stabilize the patient with BVM ventilation, and perform the procedure with the transport stopped whenever possible. A moving platform dramatically reduces laryngoscopy success and significantly raises the risk of a failed airway.
Common Pitfalls
- Inadequate tube securing. The two highest-risk moments for inadvertent extubation are the lateral transfer to the transport cot and the transfer to the receiving bed. Tube security should be actively verified at both.
- Not rechecking position after transfers.A tube that was correctly positioned in the ICU may migrate 1–2 cm during the physical act of transfer, converting a correctly placed ETT to a right mainstem intubation.
- Attempting intubation in a moving vehicle or aircraft. This nearly always fails and wastes critical time. Stop, stabilize, then act.
- Losing or never attaching capnography.Capnography is not optional for intubated transport patients. Teams that “forgot to attach it” or disconnected it during loading have no early warning system for the most common transport airway emergency.
- Leaving the cuff air-filled for flight. Predictable altitude expansion of an air-filled cuff causes mucosal ischemia at best and a leak that destabilizes ventilation at worst. This is a preventable complication.
- No suction immediately accessible. Suction stored out of reach during transport is functionally absent during an airway emergency.
Board Exam Pearls
- Continuous waveform capnography is mandatory for the intubated transport patient. Loss of the ETCO₂ waveform = tube displacement until proven otherwise.
- DOPE (Displacement, Obstruction, Pneumothorax, Equipment failure) structures the response to any acute deterioration of an intubated transport patient. Work through it in order; treat displacement and obstruction as the most common causes first.
- Secure the airway BEFORE departure. The threshold for pre-emptive intubation is lower in transport than in the ICU because rescue capability is also lower.
- Use saline in the cuff for air transport to prevent altitude expansion. Re-check cuff pressure on descent as the cuff will deflate and may lose the mucosal seal.
- Never intubate in a moving vehicle. Stop the vehicle, stabilize with BVM, then perform laryngoscopy.
FAQ
Should I intubate the patient before or wait until en route?
Always before departure if there is any meaningful doubt about airway stability for the duration of the trip. Re-intubation in a moving ambulance or cramped aircraft is a last resort with severely limited resources and help. If the question is whether this patient can maintain their airway for the next hour without intervention, and the answer is uncertain, make the airway definitive before you leave.
How do I confirm endotracheal tube placement once we are in transit?
Continuous waveform capnography is the gold standard en route. Before departure, confirm appropriate tube depth (cm at the lip), bilateral breath sounds, and a normal ETCO₂ waveform. Once moving, keep the capnograph running — it provides real-time breath-by-breath confirmation of tube position and ventilation. Auscultation alone is unreliable in a noisy transport environment.
The ETCO₂ waveform just disappeared — what do I do?
Treat loss of the ETCO₂ waveform as tube displacement until proven otherwise and run DOPE immediately. D — is the tube Displaced (check depth, listen for sounds over the epigastrium)? O — is there an Obstruction (secretions, kinked circuit)? P — is there a Pneumothorax (absent breath sounds, hypotension, tracheal deviation)? E — is there Equipment failure (disconnected circuit, capnograph sensor off, ventilator malfunction)? Work through this sequence rapidly and do not assume equipment failure first.
Why do I need to manage the cuff differently for air transport?
An air-filled endotracheal tube cuff contains gas that expands as cabin altitude increases, following Boyle's Law. Even a modest altitude gain can raise cuff pressure enough to cause tracheal mucosal ischemia or a partial cuff seal leak that alters ventilation. For air transport, either fill the cuff with saline (which does not expand) or monitor cuff pressure continuously and deflate as needed to keep pressure in the safe range (typically 20–30 cmH₂O).
Put it to work
A secure airway needs oxygen behind it for the whole trip. Confirm the supply with the Oxygen Tank Duration calculator.
Open the Oxygen Tank Duration calculator →Related Resources
Sources
- Warren J, Fromm RE Jr, Orr RA, Rotello LC, Horst HM; American College of Critical Care Medicine. Guidelines for the inter- and intrahospital transport of critically ill patients. Crit Care Med. 2004;32(1):256-262.
- Kacmarek RM, Stoller JK, Heuer AJ. Egan's Fundamentals of Respiratory Care. 12th ed. Elsevier; 2021. Airway management and capnography chapters.