71210 Bioelectromagnetism - Exercises Autumn 2004

Impedance Plethysmography

1. Bioimpedance measurements measure
   1. electric function
   2. magnetic fields
   3. the tissue properties
2. Analyzing the sensitivity distribution of an impedance measurement, one needs to take into account at least _____ lead fields
   1. 1
   2. 2
   3. 3
   4. 4
3. Tetrapolar measurement is preferred in impedance plethysmography because
   1. current injection and voltage measurement are separate circuits
   2. it's nice to have several electrodes attached to your body
   3. the effects of electrode contacts are minimized this way
4. Impedance signal in impedance cardiography does NOT reflect changes in
   1. blood volume in ventricles
   2. ventilation
   3. blood flow in aorta
   4. electric activity of the heart
   5. intrathoracic fluid content

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