Chart — Transport Respiratory Care
Transport Stressors: Effects & Mitigation
The classic transport stressors at a glance — each with its mechanism, its effect on a critically ill patient, and the concrete respiratory mitigation. Built for quick recall before a transfer.
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.
Stressors, Effects, and Mitigation
| Stressor | Mechanism | Effect on Patient | Mitigation |
|---|---|---|---|
| Hypoxia | Falling PiO₂ at altitude (Dalton) | Worsening hypoxemia | Raise FiO₂; lower cabin altitude if needed. |
| Barometric pressure change | Trapped gas expands (Boyle) | Pneumothorax, cuff overinflation, bowel/ear/sinus pain | Decompress closed spaces; saline ETT cuff. |
| Thermal changes | Cold cabin/altitude | Cold stress raises O₂ consumption (esp. neonates) | Blankets, warmed cabin, thermal protection. |
| Decreased humidity | Very dry cabin air | Dries and thickens secretions; tube occlusion | HME; hydration. |
| Noise | Engine/road noise | Obscures auscultation and alarms; patient stress | Hearing protection; visual alarms; capnography. |
| Vibration | Continuous mechanical vibration | SpO₂ artifact; discomfort; loosened equipment | Secure equipment; trust capnography over a jittery pleth. |
| Acceleration/deceleration (G-forces) | Takeoff, landing, braking | Fluid shifts; transient BP changes | Position per protocol; secure restraint. |
| Fatigue | Long, noisy, vibrating missions | Reduced crew vigilance | Planning; checklists; crew resource management. |
| Spatial disorientation / flicker vertigo | Visual-vestibular mismatch; rotor flicker | Crew impairment (team, not patient) | Crew training and awareness. |
How to Use This Chart
No transport environment is free of stressors — altitude, ground, and rotor all impose them in combination. Review this table before every transfer and identify which stressors are most relevant to your patient’s current condition and the planned transport mode.
- Stressors are cumulative. A patient who is marginally compensated at the bedside may decompensate under combined hypoxia, cold, and vibration.
- Two stressors drive most respiratory problems in flight: hypoxia (Dalton) and gas expansion (Boyle).
- Decreased humidity and cold are easy to underestimateand both have respiratory consequences — secretion drying and raised O₂ consumption respectively.
Related Resources
Sources
- Kacmarek RM, Stoller JK, Heuer AJ. Egan's Fundamentals of Respiratory Care. 12th ed. Elsevier; 2021. Physics and physiology of respiration.
- Commission on Accreditation of Medical Transport Systems. Accreditation Standards of the Commission on Accreditation of Medical Transport Systems. 11th ed. CAMTS; 2018.