Bladder welding in rats using controlled temperature CO2 laser system

Area of Science:

• Biomedical Engineering
• Surgical Technology
• Laser Medicine

Background:

• Laser tissue welding presents advantages over traditional sutures, including reduced infection risk and faster healing.
• Clinical adoption is limited by challenges in controlling welding parameters, particularly surface temperature.
• Precise temperature monitoring is crucial for reliable laser tissue welding outcomes.

Purpose of the Study:

• To develop an advanced laser system for controlled temperature monitoring and application during tissue welding.
• To establish reliable conditions for laser welding of urinary tract tissues.
• To improve the safety and efficacy of laser-based surgical wound closure.

Main Methods:

• A novel
• smart
• laser system was engineered for simultaneous CO2 laser delivery and noncontact radiometric temperature monitoring.
• Bladder cystotomy was performed on 38 rats; 33 underwent laser welding, and 5 received conventional sutures.
• Optimal welding was achieved by maintaining a surface temperature of 71 ± 5°C, with outcomes assessed clinically and histologically.

Main Results:

• The laser welding system demonstrated a high success rate of 94% (31/33 animals) for bladder closure.
• Histological analysis confirmed excellent tissue welding and healing quality.
• No significant complications were reported in the laser-welded group.

Conclusions:

• Laser welding is an effective method for urinary bladder repair in rats, evidenced by high survival rates and superior scar quality.
• The developed system provides reliable temperature control, essential for successful laser tissue welding.
• Future research will focus on larger animal models and explore different laser types for enhanced tissue penetration.