A patient is being monitored for fluid volume with the use of a device that measures the resistance to the flow of electrical current. The technology being used to assess this patient would be
1. impedance cardiography.
2. Doppler.
3. pulse contour analysis.
4. pulse oximetry.
1
Rationale: Impedance cardiography is used to assess cardiac function through the use of a high-frequency, low-amplitude current to measure the resistance to flow of the electrical current. The use of the pulse contour analysis is based upon the principle that the stroke volume may be measured by assessing the beat to beat changes in the amplitude of the pulse pressure as displayed on the waveform. Doppler technology uses ultrasound through a probe to measure heart rate and blood flow. Pulse oximetry is used to measure peripheral oxygenation of tissues.
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