重要由于除颤器产生的波形由病人身体的电阻抗所决定，因此只有当电极放置于病人体表后方能开始对除颤器进行充电。
Important Since the waveform (duration and amplitude) from the defibrillator depends on patient impedance, defibrillator charging must only start after the electrodes have been placed on the patient.
目的应用生物电阻抗分析法，检测慢性阻塞性肺病(COPD)患者的人体组成的改变。
Objective To measure the body composition of the patients with chronic obstructive pulmonary dis-ease (COPD) by bioelectrical impedance analysis.
目的：通过应用生物电阻抗法测定人体组成，探讨其对营养评价的临床意义。
Objectives: To detect body composition and evaluate the influence of body composition on nutritional assessment.
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