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Mindray MEC2000 PM7000 PM8000 PM9000 patient monitor ECG board
►Brief Introduction
This module is designed to measure three parameters including ECG, RESP and TEMP.
► Specifications
| Sensitivity | 1 V/mv + 5%(reference 10Hz) |
| Impedance | 50 (ohm) |
| Signal Delay | ECG:25ms |
| Signal Range | ± 8 (mV) p-p |
► Functions
This module uses ECG cables and TEMP sensors to collect ECG, RESP and TEMP signals,
process them and transmit them to the main board through serial port.
ECG Signal Input Circuit
Input protection and filter circuit: receives ECG signals from ECG cables, removes high-frequency interference and prevents the circuit from being damaged by high voltage generated in defibrillation and ESD.
Right leg drive circuit: picks up 50/60Hz common-mode signals in lead wire and feeds them back to patient body; suppresses the common-mode interference in lead wire for the sake of better detecting ECG signals.
Lead Off detection circuit: detects if any ECG lead falls off and transmits relevant message to CPU.
ECG Signal Process Circuit
Differential Amplification circuit: first-order amplifies ECG signals and suppresses common-mode interference at the same time.
Low-pass filter circuit: removes high-frequency interference outside frequency band of ECG signals.
PACE signals are ECG pacing signals, which greatly affect ECG detecting performance.
Therefore PACE suppression circuit is designed to suppress PACE signals in order to better detect ECG signals.
Master AMP/Filter circuit: amplifies and filters ECG signals again and transmits them furthermore into A/D converter.
Pace Detect
Pick PACE signals out of ECG signals and transmit them to CPU.
Temperature Detect Circuit
Receive signals coming from TEMP sensor, amplify and filter the signals and transmit them furthermore into A/D converter.
Carrier Generate Circuit
RESP measurement is based on Impedance method. Respiration causes the changes of thoracic impedances, which feature is taken advantage to modulate the amplitude of high frequency carrier. The modulated signals are then sent into the measuring circuit. This circuit is designed to generate high frequency carrier
RESP Signal Input Circuit
Couples the RESP signals into the detection circuit.
RESP Signal Process Circuit
Preamplifier circuit: amplifies and filters RESP signals;
Detection circuit: picks out the RESP wave modulated in excitation signals;
Level translation circuit: removes DC components in RESP signals;
Master AMP/Filter circuit: amplifies and filters RESP signals again and transmits them furthermore into A/D converter.
A/D
Convert analog signals output from each parameter circuit into digital signals, and send them into CPU part to receive further processing.
CPU System
Realize logic control over all parameter parts and A/D part.
Process data of each parameter;
Communicate with main board.
Power & Signal Isolate Circuit
Realize isolation from external circuit in order to ensure human safety;
Provide power supplies for circuits;
Realize isolating communication between CPU System and main board.
► About Us
We have supply the Parts, Accessories and medical equipment of
Patient Monitor, Defibrillator Machine, ECG Machine, Ventilator,
Anesthesia Machine, Ultrasound such as
etc.
If you want to explore more details about Mindray MEC2000 PM7000 PM8000 PM9000 Patient Bedside Monitor ECG board, please let us know. Looking forward to receiving your early inquiry.
