About this trial
This randomized crossover simulation study will compare two hand positions used during chest compressions: interlocked fingers and non-interlocked hands placed one on top of the other. The study will evaluate whether the non-interlocked hand position is non-inferior to the interlocked-finger technique with regard to chest compression depth, and will compare the two techniques in terms of CPR quality, rescuer comfort, fatigue, pain or discomfort, and perceived hand-position stability.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Adults aged 18 years or older
Healthcare professionals or laypersons
Physically able to perform chest compressions
Able and willing to provide written informed consent to participate in the study
Disqualifiers
Acute injury of the upper extremities
Chronic musculoskeletal disease or symptoms that may interfere with the ability to perform chest compressions with adequate quality
technical issue during data collection
Trial design
Crossover
Treatments tested in this trial
Interlocked-finger chest compression technique
BehavioralParticipants will perform chest compressions using the interlocked-finger hand position. One hand will be placed on the lower half of the sternum and the other hand on top, with the fingers interlocked. The intervention will consist of 2 minutes of continuous chest compressions performed at a target rate of 100-120 compressions per minute and a target depth of 5-6 cm, with complete chest recoil after each compression. No real-time feedback will be provided.
Overlapped hands chest compression technique
BehavioralParticipants will perform chest compressions using the non-interlocked hand position. One hand will be placed on the lower half of the sternum and the other hand on top without interlocking the fingers. The intervention will consist of 2 minutes of continuous chest compressions performed under the same conditions as the interlocked-finger technique, with a target rate of 100-120 compressions per minute, a target depth of 5-6 cm, and complete chest recoil after each compression. No real-time feedback will be provided.
Treatment groups
Trial outcomes
Primary outcomes
Mean chest compression depth (mm)
Mean chest compression depth recorded continuously by the manikin's integrated measurement system during CPR performance.
Secondary outcomes
Chest compression rate (per minute)
Mean chest compression rate (compressions per minute) recorded by the manikin's integrated measurement system during CPR performance.
Proportion of compressions with adequate depth (%)
Proportion of chest compressions meeting the predefined target depth, as recorded by the manikin's integrated measurement system.
Proportion of compressions with complete chest recoil (%)
Proportion of chest compressions followed by complete chest recoil, as recorded by the manikin's integrated measurement system.
Interruption duration (sec)
Duration of interruptions in chest compressions (hand-off time), if applicable, recorded by the manikin's integrated measurement system.
Sponsors and contacts
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