Motherboard NIHON KOHDEN Cardiolife TEC-7631C Defibrillator Mainboard UR-0247

Here are the key characteristics of the NIHON KOHDEN Cardiolife TEC-7631C defibrillator motherboard, described in English bullet points:

• High-Voltage Circuitry Integration: The motherboard is intricately designed to manage and integrate the high-voltage charging and delivery circuit. This is its most critical function, responsible for generating, shaping, and controlling the precise electrical energy (joules) delivered to the patient during defibrillation or synchronized cardioversion.

• Advanced Microprocessor Control: At its core, it uses a powerful microprocessor or a set of microprocessors (CPUs/DSPs). This computing power is essential for:

  • Waveform Analysis: Processing ECG signals in real-time for arrhythmia detection, especially for automated external defibrillation (AED) mode.

  • Synchronization: Precisely timing the energy delivery to avoid the heart's vulnerable period (T-wave) during synchronized cardioversion.

  • System Management: Controlling all other functions, from user interface responses to data logging.

• Signal Acquisition and Processing: It features highly sensitive and filtered analog front-end circuits specifically designed for acquiring the patient's ECG signal. These circuits are built to be extremely resilient against electrical noise and the massive electrical interference generated by the defibrillation pulse itself to ensure a clear, artifact-free signal is always available.

• Impedance Monitoring Circuitry: A key safety and efficacy feature is the ability to measure transthoracic impedance (the resistance of the patient's chest to the electrical current). The motherboard analyzes this measurement and may adjust the delivered energy waveform to ensure optimal current flow for successful defibrillation.

Here are the precautions for using the NIHON KOHDEN Cardiolife TEC-7631C defibrillator motherboard, described in English bullet points:

Safety and Handling Precautions

High-Voltage Danger: The motherboard contains lethal voltages stored in capacitors, even when the device is turned off or unplugged. Only qualified biomedical technicians trained on high-voltage medical equipment should ever handle or service the motherboard.

Complete Power Disconnection: Before any inspection or service, fully disconnect the defibrillator from AC mains power and remove the internal battery pack. Wait the manufacturer-specified time to allow the internal capacitors to fully discharge before proceeding.

Installation and Maintenance Precautions

• Calibration and Verification Required: After any motherboard replacement or significant repair, the entire device must be recalibrated and its safety and performance verified using a defibrillator analyzer. This is critical to ensure:

  • Energy Output Accuracy: The delivered joules must be precise.

  • Synchronization Function: The sync pulse must be correctly timed to the R-wave.

  • ECG Accuracy: The acquired ECG waveform must be faithful and artifact-free.

  • Pacemaker Detection: The impedance monitoring system must function correctly to protect the patient.

• Secure All Connections: Ensure all ribbon cables, wire harnesses, and connectors are firmly and correctly reseated. A loose connection on a critical component like the motherboard can lead to a complete system failure during a rescue attempt.

• Factory-Authorized Parts: Use only NIHON KOHDEN-approved replacement parts or their authorized equivalents. Incompatible or off-brand components can compromise device safety, performance, and regulatory compliance (e.g., FDA, CE Mark).

• Firmware Compatibility: Ensure the motherboard's firmware version is compatible with the other hardware components (display, parameter boards, etc.) and the device's software. An update may be required after installation.

• Environmental Conditions: Avoid exposing the motherboard (and the defibrillator) to extreme temperatures, humidity, or strong magnetic fields, as this can damage its components.

• Electrostatic Discharge (ESD) Protection: Always use an anti-static wrist strap and work on an ESD-safe mat. The motherboard contains highly sensitive integrated circuits that can be easily damaged by static electricity from the human body.

• Avoid Physical Contact: Handle the board only by its edges. Do not touch components, connectors, or circuit traces. Contamination from skin oils or physical pressure can damage delicate parts.

• Prevent Contamination: Ensure hands are clean and the work environment is as dust-free as possible. Foreign materials can cause short circuits or interfere with connections.

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