The purpose of this study is to analyze the accuracy of respiratory and breathing patterns generated through impedance changes generated by a patch-type electrocardiogram device (HiCardi+ wearable patch device, Mezoo Co., Ltd.), targeting patients undergoing pulmonary function testing and ventilator application.
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Respiratory rate measured by pulmonary function test
Timeframe: During the pulmonary function test (about 30 minutes)
Respiratory rate measured by ventilator
Timeframe: about 6 hours
Respiratory rate measured by patch-type electrocardiogram device
Timeframe: up to 6 hours