Comparisons of the vertical one-handed chest compressions according to the rescuer's handedness.

OBJECTIVE: The vertical one-handed chest compression (OHCC) technique has demonstrated superior compression power and chest compression depth (CCD) compared to conventional OHCC. This study aimed to determine if a rescuer's handedness influences the CCD during the vertical OHCC. METHODS: This prospective randomized crossover simulation trial included 59 medical doctors. Each performed a 2-min single-rescuer cardiopulmonary resuscitation (CPR) on a pediatric manikin using the vertical OHCC, once with the dominant hand (Test 1) and once with the non-dominant hand (Test 2). CPR parameters were recorded in real-time via sensors in the manikin, and the compression force exerted by each hand was measured using a force plate. RESULTS: The mean and adequate CCD did not differ significantly between Test 1 and 2 (mean depth: 52 mm (interquartile range [IQR]: 49-57) in Test 1 vs. 52 mm (IQR: 49-57) in Test 2, P = 0.625; adequate depth: 97% (IQR: 37-100) in Test 1 vs. 92% (IQR: 51-99) in Test 2, P = 0.619). The mean compression force was significantly greater in the dominant hand compared to the non-dominant hand (23.1 kg ± 4.9 in dominant hand vs. 21.7 kg ± 4.1 in non-dominant hand, P < 0.001). Other parameters showed no significant differences between Tests 1 and 2. CONCLUSIONS: While vertical OHCC with a dominant hand generated greater force, the rescuer's handedness did not affect the CCD during the vertical OHCC.

Injury to the Left Sciatic and Right Common Peroneal Nerves Combined With Multifocal Rhabdomyolysis in a Survivor of the Itaewon Crowd Crush: A Case Report.

We report the case of a 27-year-old survivor of the Halloween crowd crush in Itaewon, Seoul, Korea who was diagnosed with left sciatic neuropathy and right common peroneal neuropathy accompanied by multifocal rhabdomyolysis. The patient presented to the emergency room complaining of pain from her lower back to her whole lower extremities with paraparesis and paresthesia. Her blood test showed the marked elevation of creatine kinase and liver enzymes. Magnetic resonance imaging revealed multifocal signal changes in the abdominalis and pelvic girdle muscles suggestive of rhabdomyolysis. Magnetic resonance neurography demonstrated injury to the left sciatic and right peroneal nerves. Electrophysiologic studies also revealed lesions in the left sciatic and right peroneal nerves. After comprehensive rehabilitation and conservative treatment for three months, her muscle strength improved, and she could walk independently. Although several previous studies have reported peripheral neuropathy in immobilized patients, to the best of our knowledge, no case associated with a crowd crush has been reported. Therefore, we report the case of multifocal neuropathy combined with rhabdomyolysis in a victim of a crowd crush incident with good recovery.