Channel generally refers to the channel for signal acquisition; the placement of electrodes and the connection of wires to the amplifier when tracing an ECG is called ECG leads.
The placement of electrodes and the connection of wires and amplifiers for tracing the ECG is called placing two electrodes at two different points on the body surface and connecting them to the ECG machine through wires to trace an ECG waveform. A single-channel electrocardiograph with ten electrodes in standard leads, but only one acquisition channel, so lead switching circuits are needed to measure the electrocardiogram one lead at a time.
Expanded information:
Routine maintenance of the ECG machine;
1, the electrodes should be kept clean every day after the ECG tracing. Copper alloy made of electrodes if rust spots, fine sandpaper can be used to wipe off the rust spots, and then soaked in saline overnight, so that the surface of the formation of a stable performance of the film. Silver-plated electrodes can be washed with water and wiped dry to avoid scratches on the silver-plated layer.
2, the lead cable core or shielding easily broken and damaged, especially near the ends of the joints, do not pull or twisted, collection should be coiled into a larger diameter ring or hanging, to avoid excessive distortion or sharp folding.
3, AC and DC electrocardiograph, should be charged in time according to the instructions, in order to extend the service life of the battery.
4, ECG machine should be avoided high temperature, sun, moisture, dust or impact, with a good dust cover.
5, every six months to open the cover of the machine to remove dust, moisture and inspection. Timely removal of dust in the circuit board to ensure that the machine is dry, to avoid short-circuit due to moisture or dust, damage to the circuit board.
6, by the medical equipment maintenance department to regularly test the performance of the ECG machine. Hot pen recording electrocardiogram machine should be based on the thermal sensitivity of the recording paper and the speed of paper travel, adjust the pressure and temperature of the hot pen. Electrocardiogram machine in use often appear pseudo-differential interference fault, serious impact on the normal tracing of the electrocardiogram, should be investigated in a timely manner.