Abstract:

Objective

To analyze the related factors of the pause duration caused by the manualmechanical conversion of cardiopulmonary resuscitation （CPR） in out-of-hospital cardiac arrest （OHCA）patients.

Methods

A retrospective cohort study was conducted to analyze the OHCA patients treated by the direct-affiliated emergency stations of Yixing Emergency Medical Center from June 2023 to January 2024， all of whom received mechanical chest compression outside the hospital. A total of 160 OHCA patients were enrolled， including 120 males （75.0%） and 40 females （25.0%）， aged 34 to 89 years， with an average age of （62.75±15.48） years. Basic patient information， rescue data， and data related to the pause duration caused by the conversion to mechanical compression were collected.

Results

The patient's weight （r=0.238， P=0.002）， body mass index （r=0.238， P=0.002）， and the duration of mechanical compression initiation（r=0.912， P＜0.001） were positively linearly correlated with the pause duration. Multiple linear regression analysis revealed that the patient's height （P=0.01）， body mass index （BMI） （P=0.046）， and the duration of mechanical compression initiation （P＜0.001） were independent risk factors for the pause duration.

Conclusion

The patient's height， BMI， and the duration of mechanical compression initiation are correlated with the duration of chest compression interruption.

Key words: Out-of-hospital cardiac arrest, Pre-hospital, Cardio-pulmonary resuscitation, Mechanical compression, Manual to mechanical conversion