Guide — Transport Respiratory Care
Transport Ventilator Management
A transport ventilator is not a small ICU ventilator. This guide covers how they differ — power, drive gas, humidification, modes — how to carry ICU settings across without losing PEEP, and the drive-gas detail that can quietly halve your cylinder duration.
8 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
Transport ventilators are compact, rugged, battery- and/or pneumatically powered machines built to maintain ventilation while a patient moves between departments, floors, or facilities. They allow mechanically ventilated patients to receive imaging, procedures, or inter-facility transfers without interruption of respiratory support.
Modern turbine- and compressor-based transport ventilators approach ICU-class performance in terms of tidal volume accuracy and pressure delivery. However, many portable models trade away modes, waveform graphics, humidification systems, and fine PEEP or pressure-support control in exchange for size and weight. Understanding these trade-offs is essential before you disconnect a patient from the bedside ventilator.
Key Concepts
Several design differences distinguish transport ventilators from their ICU counterparts. The most consequential for the RT is the drive-gas question.
- Power & drive gas.Some transport ventilators are pneumatically powered — they consume oxygen as their drive gas in addition to the gas the patient breathes. Turbine-based units run on battery or electrical power and use oxygen only for FiO₂ blending. This single distinction can dramatically change cylinder duration and must be identified before any transport.
- Modes. Transport ventilators typically support volume A/C, pressure A/C, SIMV, and sometimes CPAP or pressure support. Advanced ICU modes (APRV, PAV, NAVA, HFOV) are rarely available.
- Humidification. Active heated humidifiers are impractical during transport. Standard practice is a heat-and-moisture exchanger (HME) placed at the airway, which passively recycles expired heat and humidity.
- Monitoring & graphics.Most transport ventilators display numeric values only — exhaled tidal volume, peak pressure, rate. Real-time waveform scalars and loops are typically absent. Continuous capnography (ETCO₂) and SpO₂ monitoring should be attached separately to compensate.
| Feature | Transport Vent | ICU Vent |
|---|---|---|
| Power source | Battery, pneumatic (O₂-driven), or both | AC mains power; internal battery backup only |
| Drive gas | O₂ may serve as drive gas (pneumatic models) — adds consumption | Air/O₂ blended from wall piped gas; drive gas separate |
| Available modes | Volume A/C, pressure A/C, SIMV; often CPAP/PSV limited | Full mode library: VC, PC, APRV, PRVC, PAV, NAVA, HFOV |
| Humidification | HME (passive); no active heated humidifier | Heated passover humidifier; HME optional |
| Waveform graphics | Usually numeric only (pressure, exhaled Vт, rate) | Full waveform display (scalar & loop graphics) |
| PEEP range / resolution | Limited range; coarser adjustment increments | Fine incremental control across wide range |
| Alarm sophistication | Basic: high/low pressure, apnea, disconnect | Comprehensive with configurable trending alarms |
Assessment & Findings
Preparation begins at the bedside before the patient is disconnected from the ICU ventilator. A complete pre-transport assessment includes the following:
- Document current ICU settings. Record mode, tidal volume (Vт), set rate, PEEP, FiO₂, and peak/plateau pressures. Note any special parameters (inspiratory time, I:E ratio, rise time, pressure support level) that may not transfer directly.
- Verify baseline patient status. Confirm SpO₂, ETCO₂, recent ABG results, hemodynamic status, and airway security (cuff pressure, tube depth). A patient who is marginal on the ICU vent is higher risk on a less capable transport device.
- Verify transport vent readiness. Confirm battery charge, O₂ cylinder volume (calculate duration including drive-gas consumption if applicable), HME in place, and alarm settings configured before departure.
- Confirm delivery after switching. After connecting the transport ventilator, verify exhaled tidal volume matches expectations, PEEP holds on the manometer at end-expiration, chest rise is symmetric, and ETCO₂ waveform is present and consistent.
Safety check. Never assume a transport ventilator is delivering what it is set to deliver. Confirm exhaled volume and PEEP manometrically after every circuit change. A mismatch between set and delivered values must be resolved before the patient leaves the unit.
RT Priorities & Interventions
- Match ICU settings as closely as the transport vent allows. Prioritize PEEP and FiO₂ fidelity — these protect oxygenation. Verify exhaled Vт and delivered PEEP rather than assuming the set values are being achieved.
- Place an HME. Install a heat-and-moisture exchanger between the circuit Y-piece and the endotracheal tube for any transport longer than a few minutes. Dry gas thickens secretions and irritates the airway.
- Set alarms before departure. Configure low-pressure/disconnect, high-pressure, and apnea alarms before the patient leaves the room. Do not rely on monitoring alone to catch a ventilator failure.
- Compute O₂ duration accurately. If the transport ventilator is pneumatically powered, factor drive-gas consumption into your cylinder duration estimate. The drive-gas flow rate is often specified in the device manual and can be substantial at higher set rates. Carry more O₂ than you think you need.
- Prevent auto-PEEP. At high set respiratory rates, confirm adequate expiratory time (I:E ratio ≥ 1:2, preferably 1:3 in obstructive disease) to allow full exhalation. Inadequate expiratory time causes air trapping and elevates mean airway pressure unpredictably.
- Carry a BVM with PEEP valve. A self-inflating bag-valve device with an attachable PEEP valve is mandatory backup on every transport. Secure it to the transport team where it is immediately accessible.
Common Pitfalls
- Forgetting drive-gas consumption. On pneumatically powered units, underestimating total O₂ use is the most common cause of premature cylinder depletion. Always check the device type and calculate correctly.
- Skipping the HME.Delivering cold, dry gas for even 15–20 minutes during transport can thicken secretions, increase airway resistance, and trigger bronchospasm in susceptible patients. The HME is standard of care.
- Departing with an uncharged battery. Confirm battery charge before every transport. A dead battery mid-trip with no wall power available forces immediate manual ventilation.
- Leaving alarms off or silenced. Transport environments are noisy and distracting. Audible alarms must be active. A disconnected circuit or apnea event without an alarm may not be noticed until SpO₂ drops.
- Auto-PEEP from inadequate expiratory time. High set rates on a transport vent with limited I:E control can cause progressive air trapping. Monitor for rising peak pressures or hemodynamic instability and reduce rate or prolong expiratory time if auto-PEEP is suspected.
Board Exam Pearls
- HME is the standard humidification methodduring transport — active heated humidifiers are not used. Expect exam scenarios asking what to use when a heated humidifier is unavailable.
- Pneumatically powered transport vents consume O₂ as drive gasin addition to what the patient breathes — always factor drive-gas consumption into cylinder duration. Turbine/electric units use O₂ only for FiO₂ blending.
- Always carry a self-inflating BVM with PEEP valve as mandatory backup to any transport ventilator. The NBRC expects you to know this is non-negotiable.
- Verify — don’t assume. Confirm exhaled tidal volume and PEEP delivery after connecting the transport vent. A set value is not a delivered value until verified on the manometer and exhaled-volume display.
- Auto-PEEP is a transport hazard on high respiratory rate settings. The fix is reducing set rate or increasing expiratory time to allow full exhalation.
FAQ
What is the difference between a turbine and a pneumatically powered transport ventilator, and why does it matter for O₂?
A turbine-based (electric/battery) transport ventilator uses a compressor to generate flow and blends oxygen only for FiO₂ delivery — so the only O₂ consumed is what the patient breathes. A pneumatically powered unit uses compressed oxygen as its drive gas to generate the breath itself, consuming oxygen over and above the patient's minute ventilation. That extra consumption can dramatically shorten cylinder duration, especially at higher flow rates or long transports. Always identify which type you have before computing your O₂ supply.
How do I provide humidification when there is no heated humidifier on a transport ventilator?
Place a heat-and-moisture exchanger (HME) between the ventilator circuit and the patient's airway. An HME captures expired heat and moisture and returns it on the next inspiration, providing adequate passive humidification for most transport durations. It adds a small amount of dead space and resistance, so confirm the patient is still triggering and exhaled tidal volumes are acceptable after placement.
How do I confirm that the transport ventilator is actually delivering the set PEEP?
Watch the airway pressure manometer at end-expiration. The needle should hold at the set PEEP value rather than falling to zero. If the transport vent has a numeric pressure display, verify it holds the set value between breaths. Also confirm chest rise and a stable capnography waveform, which together indicate adequate tidal volume delivery and an intact circuit.
What should I do if the transport ventilator fails mid-trip?
Immediately switch to manual ventilation with a self-inflating bag-valve-mask (BVM) device. A PEEP valve attached to the BVM expiratory port can maintain positive end-expiratory pressure while you troubleshoot or arrange return to ICU support. Carry a BVM with PEEP valve on every transport — it is a non-negotiable backup. Alert the receiving team and document the event.
Put it to work
A pneumatically driven transport vent burns oxygen far faster than minute ventilation alone. Account for it with the Oxygen Tank Duration calculator.
Open the Oxygen Tank Duration calculator →Related Resources
Sources
- Kacmarek RM, Stoller JK, Heuer AJ. Egan's Fundamentals of Respiratory Care. 12th ed. Elsevier; 2021. Mechanical ventilators and patient transport chapters.
- Cairo JM. Mosby's Respiratory Care Equipment. 11th ed. Elsevier; 2022. Transport and portable ventilators.
- American Association for Respiratory Care. AARC Clinical Practice Guideline: In-hospital transport of the mechanically ventilated patient—2002 revision & update. Respir Care. 2002;47(6):721-723.