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JOURNAL ARTICLE

The assessment of the kinematics of the rescuer in continuous chest compression during a 10-min simulation of cardiopulmonary resuscitation

Bogusław Bucki, Dariusz Waniczek, Robert Michnik, Jacek Karpe, Andrzej Bieniek, Arkadiusz Niczyporuk, Joanna Makarska, Tomasz Stepien, Dariusz Myrcik, Hanna Misiołek
European Journal of Medical Research 2019 February 8, 24 (1): 9
30736850

BACKGROUND: In pursuit of improvement in cardiopulmonary resuscitation (CPR), new technologies for the measurement and assessment of CPR quality are implemented. In our study, we assessed the kinematics of the rescuer during continuous chest compression (CCC-CPR). The proper performance of the procedure is a survival predictor for patients with cardiac arrest (CA). The purpose of the study was a prospective assessment of the kinematics of the rescuer's body with consideration given to the depth and rate of chest compression (CC) as the indicator of properly performed CC maneuver by professional and non-professional rescuers during a simulation of a 10-min CCC using a manikin.

METHODS: Forty participants were enrolled in the study. CCC-CPR was performed in accordance with the 2015 AHA guidelines on a manikin positioned on the floor. Kinematic data on the movement were obtained from the measuring system (X-sens MVN Biomech) transmitting information from 17 inertial sensors. Measurement data were imported to the author's program RKO-Kinemat written in the Matlab and C # environments. Two groups of results were distinguished: Group I-results of CC with the depth of ≥ 40 mm and Group 2-CC results with the depth of < 40 mm.

RESULTS: The multiple regression model demonstrated that the path length, left knee flexion angle, and left elbow flexion angle were the essential elements of the rescuer's kinematics that facilitated achieving and maintaining the normal depth of CC.

CONCLUSIONS: We believe that raising the rescuer's hips by moving the center of the rescuer's body over the point of sternal compression increases the value of the CC force vector, thereby increasing the depth of CC. In addition, we observed that, during an effective CC, the rescuer was unable to maintain arms straight and, in consequence, a slight elbow flexion was observed. It, however, did not influence the quality of the maneuver.

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