Transport with ongoing resuscitation: a comparison between manual and mechanical compression

Area of Science:

• Emergency Medicine
• Cardiovascular Research
• Biomedical Engineering

Background:

• Transporting out-of-hospital cardiac arrest patients with ongoing resuscitation presents unique challenges.
• External mechanical chest compression devices are being explored as alternatives to manual compressions during transport.

Purpose of the Study:

• To compare the effectiveness of manual chest compressions versus mechanical devices (LUCAS 2, AutoPulse, animax mono) during simulated ambulance transport.
• To evaluate compression frequency, depth, and consistency under transport conditions.

Main Methods:

• A resuscitation manikin (Ambu Man Wireless MegaCode) was used for 10 trials per device.
• Comparisons included manual compressions, LUCAS 2, AutoPulse, and animax mono.
• Testing was conducted in an ambulance vehicle over a 5.0 km track.

Main Results:

• Manual and animax mono achieved higher compression frequencies than LUCAS 2 and AutoPulse.
• Mechanical devices (LUCAS 2, AutoPulse, animax mono) provided constant compressions, unaffected by vehicle motion.
• Only animax mono met recommended compression depth (51.2 mm); manual compression quality degraded during maneuvers.

Conclusions:

• Mechanical chest compression devices may enhance rescuer and patient safety during resuscitation transport.
• Animax mono was the only device to meet guideline specifications for compression frequency and depth.
• Mechanical devices offer reliable, motion-independent compressions, but further in-vivo studies are needed to confirm patient transport effectiveness.