The NICO100C simultaneously measures impedance magnitude (Zo; labeled “Z”) and derivative (dZ/dt; labeled “DZ”). Zo and dZ/dt can be recorded at four different measurement frequencies, from 12.5kHz to 100kHz; cardiac output measurements are usually performed at a measurement frequency of 50 kHz.
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The CH SELECT switch has four bank settings, which assign NICO100C output (Zo and dZ/dt) channels as follows:
|Bank||Magnitude (Zo)||Derivative (dZ/dt)|
|1||Channel 1||Channel 9|
|2||Channel 2||Channel 10|
|3||Channel 3||Channel 11|
|4||Channel 4||Channel 12|
If a particular NICO100C output is not used, the respective assigned channel cannot be used for another modules output; simply do not record on the assigned channel.
Possible Lead Configurations
- Human, Absolute, Shielded: LEAD130 lead with EL506 bioimpedance strip or EL500 paired disposable electrodes.
- Human, Absolute, Unshielded: 8 x LEAD110 leads with 4 x CBL204 Touchproof “Y” lead adapters and EL500 paired disposable electrodes.
- Human, Relative Measures, Unshielded or Small Animal or EBI-specific Measures (flow, plethysmography, etc.): 4 x LEAD110 leads with EL506 bioimpedance strip or EL500 paired disposable electrodes.
- Use for injecting current and averaging at four paired-electrode sites (required for cardiac output measurements). The best placement for all eight electrodes, considering the anatomical shape of the thorax, is along the frontal plane (wider dimension). When directed through the thorax, the measurement current seeks the shortest and most conductive pathway. Consequently, the measurement current flows through the thoracic aorta and vena cava superior and inferior.
- Methodological Guidelines for Impedance Cardiography , PSYCHOPHYSIOLOGY, Vol. 27, No. 1