In clinical use, rigid endoscopes—due to their need to be adapted to various surgical scenarios—are prone to malfunctions in certain components that are susceptible to external forces and environmental factors. Below, we’ve compiled common issues and repair guidelines for their four core vulnerable components (the ocular system, the light column, the lens sequence system, and the objective system), helping medical institutions quickly identify faults and efficiently resolve problems.

I. Ocular System

Common failure: Bottom leakage.

Cause: Excessive force, improper angle, or over-tightening the connector when connecting or disconnecting the lamp cord can deform the sealing structure and damage the sealing ring.

Effects: Blurred vision and liquid seepage damaging internal components.

II. Light Pole

Common faults:

Connection end: Interface wear and poor contact, manifesting as unstable or no light in the field of view (due to frequent plugging and unplugging of the lamp cable).

Main structure: The metal casing is deformed, and the internal fiber optic bundle is broken, resulting in reduced brightness (due to collision or drop).

Key repair points: Replace the connector terminals if the interface is worn; splice or replace the fiber optic cable after detecting a break.

III. Lens Sequence System

Common faults:

Lens scratches / wear: The field of view shows scratches and blurred imaging (caused by rough cleaning tools or collisions with instruments).

Lens misalignment / displacement: Visual field distortion, double vision (caused by severe impact leading to loosening of fixed structures).

Key repair points: Perform nanometer-level grinding and polishing on scratched lenses; reposition and secure misaligned lenses to ensure coaxial alignment.

IV. Objective Lens System

Common failure: Tip damage.

Cause: Contact with razors or laser equipment during surgery, or accidental drops or collisions with hard objects during handling or surgery.

Symptoms: Damage to the peripheral visual field, localized blurring; in severe cases, window rupture leading to fluid leakage.

I. Key Points for Maintenance

1. Private repairs are strictly prohibited; only professional institutions with medical device repair qualifications or officially authorized service providers are permitted to handle such repairs.

2. Before maintenance, it is necessary to clearly identify the type of fault (e.g., water leakage, image abnormalities) and provide records of usage and previous maintenance history.

3. After maintenance, the equipment must undergo testing—including performance calibration, leak testing, and disinfection/sterilization—to ensure it meets the required standards before it can be put into use.

II. Key Storage Points

1. Before storage, the endoscope must be thoroughly cleaned, disinfected, and sterilized, and then dried inside and out using compressed air to ensure it is completely dry.

2. Store in a clean, well-ventilated environment at 10–20℃ with a relative humidity of 40%–60%, and avoid direct sunlight and corrosive gases.

3. Store and hang items in dedicated storage cabinets to avoid folding or crushing. Store accessories separately and check the endoscope’s condition once a week.