STORZ UH400

The STORZ UH400 is a high-frequency electrosurgical device, part of its advanced energy platform product line, designed for modern operating rooms. It provides precise electrosurgical cutting and coagulation functions. Below are the key features and applications of the device:

Core Functions and Technology

High-Frequency Electrosurgical Technology:

The UH400 utilizes high-frequency current for tissue cutting and coagulation, suitable for open surgeries, laparoscopic procedures, and minimally invasive operations. It reduces intraoperative bleeding and improves surgical efficiency.

Bipolar and Monopolar Modes:

Monopolar Mode: Used for rapid cutting or large-area coagulation, compatible with various electrodes (e.g., electrosurgical pencils, hooks).

Bipolar Mode: Enables precise coagulation, ideal for delicate tissues (e.g., near nerves or blood vessels), commonly used in neurosurgery or plastic surgery.

Intelligent Power Adjustment: Automatically adjusts output power based on tissue impedance to avoid excessive thermal damage, enhancing surgical safety.

Key Features

Modular Design:

Can be integrated into STORZ’s OR1 operating room systems, working seamlessly with endoscopes and imaging equipment, making it suitable for integrated operating rooms.

User-Friendly Interface:

Features a touchscreen with preset surgical programs (e.g., general surgery, gynecology, urology), simplifying workflows.

Safety Protections:

Includes Patient Return Electrode Monitoring (REM) and arc detection to reduce burn risks. Complies with international electrical safety standards (e.g., IEC 60601).

Repair Case Study

Repair and Inspection:

1.Visual Inspection: The host unit appeared intact with no signs of external damage, such as deformations, cracks, or physical harm to the interfaces.

2.Power-On Test: Upon connecting to AC power, the host failed to start normally, displaying a hardware error code on the screen immediately. Initial diagnosis indicated a power module malfunction.

3.Internal Inspection:

After disassembling the host, the power board circuitry was examined, revealing abnormal parameter fluctuations in multiple chips and unstable voltage output in certain areas.

A multimeter confirmed capacitor aging, leading to degraded filtering performance and unstable power supply.

The cooling fan was heavily dust-clogged, potentially impairing heat dissipation efficiency.

Repair Plan:

1.Power Board Repair:

2.Replaced aged capacitors and malfunctioning chips, and re-soldered loose connections.

3.Used an oscilloscope to calibrate the power board’s output parameters, ensuring stable voltage across all circuits.

Additional Maintenance: 

Thoroughly cleaned dust from the motherboard and cooling fan, optimizing airflow design.

Conducted comprehensive testing; the host operated normally after 48 hours of continuous power-on without errors, confirming successful repair.