Why Does Fiber Burn at the Coupling Part During Holmium Laser Surgeries?
Holmium laser fibers are essential in urology, orthopedics, and ENT surgeries, enabling precise stone fragmentation and tissue ablation. However, one common issue is fiber burn at the coupling part, which can compromise performance, safety, and efficiency. Understanding the reasons behind this can help prevent damage and extend fiber lifespan.
Key Reasons for Fiber Burn at the Coupling Part
- Misalignment Between the Fiber and Laser Source
If the fiber is not properly aligned with the laser’s output port, energy dispersion occurs, leading to overheating.
Even slight misalignment can cause energy reflection, which burns the coupling part.
Solution: Ensure correct insertion and alignment before activation.
- Contaminants at the Fiber Connection
Dust, debris, or oil at the coupling point can absorb laser energy, creating hot spots that burn the fiber.
Solution: Clean the fiber end and laser port before each use with lint-free wipes and alcohol.
- Excessive Laser Power or Pulse Settings
Running the laser at high power for extended periods generates intense heat, especially if the fiber isn’t transmitting energy efficiently.
Solution: Use optimal power settings for each procedure to reduce stress on the fiber.
- Backscatter of Laser Energy
If the fiber tip is damaged, poorly cleaved, or contaminated, energy can reflect backward, causing the coupling area to overheat and burn.
Solution: Regularly inspect, cleave, and replace fibers to maintain energy efficiency.
- Over-Tightening the Connector
Applying too much force when securing the fiber to the laser unit can distort the fiber core, leading to misalignment and localized heating.
Solution: Tighten firmly but not excessively to maintain proper alignment.
- Fiber Degradation Over Time
Reusing fibers beyond their intended lifespan results in decreased energy transmission efficiency, leading to heat buildup at the coupling part.
Solution: Monitor fiber wear and replace it when energy transmission drops.
Preventing Fiber Burn: Best Practices
Ensure proper alignment of the fiber and laser source. Keep the fiber connection clean and free from dust or oil. Use appropriate power settings to prevent excessive heating. Inspect and cleave fibers regularly to avoid backscatter. Avoid overtightening the fiber connector to prevent internal damage.
By following these steps, surgeons can reduce fiber burn, enhance procedure safety, and extend the life of holmium laser fibers, ensuring optimal surgical outcomes.
