Thulium Laser vs Suture Renorrhaphy in Laparoscopic Partial Nephrectomy

Overview

This randomized trial compared thulium laser-assisted tumor bed coagulation (LLPN) with conventional suture renorrhaphy (CLPN) in laparoscopic partial nephrectomy for small renal masses. LLPN demonstrated reduced warm ischemia time and fibrogenic biomarker elevation, with comparable perioperative safety and renal functional outcomes.

Background

Partial nephrectomy is the preferred treatment for small renal masses, balancing oncologic control and renal function preservation. Traditional hemostasis relies on suture renorrhaphy, which prolongs ischemia and may contribute to parenchymal injury and fibrosis. The 2-μm continuous thulium laser offers precise coagulation with minimal collateral damage, potentially reducing ischemic injury and fibrogenic remodeling. Biomarkers such as TGF-β1 and MCP-1 serve as indicators of renal fibrosis and functional decline post-surgery.

Data Highlights

Key Findings

• LLPN significantly reduced warm ischemia time by approximately 4 minutes compared to CLPN (14.2 vs 18.5 minutes; p < 0.01).
• Urinary fibrosis biomarkers TGF-β1 and MCP-1 increased less in the LLPN group, indicating reduced fibrogenic activity postoperatively.
• Renal function preservation was better in the LLPN group, with a smaller decline in eGFR at 3 months (−5.0 vs −7.8 mL/min/1.73 m²; p = 0.04).
• No significant differences were observed in operative time, intraoperative blood loss, or hospital stay between groups.
• Both techniques demonstrated comparable safety profiles with no increase in surgical complications.

Clinical Implications

Thulium laser-assisted tumor bed coagulation offers a viable alternative to traditional suture renorrhaphy in laparoscopic partial nephrectomy, reducing ischemic time and fibrogenic biomarker elevation without compromising safety. This technique may help preserve renal function by minimizing parenchymal injury and fibrosis. Surgeons skilled in laparoscopic techniques should consider LLPN to optimize perioperative outcomes in patients with small renal masses.

Conclusion

Thulium laser-assisted coagulation in laparoscopic partial nephrectomy effectively reduces warm ischemia time and fibrogenic response compared to conventional suture renorrhaphy, supporting its use as a safe and function-preserving hemostatic method. Further studies may confirm long-term benefits on renal function.

References

1. Study Authors/Institution/2025 -- Comparative Study of Thulium Laser-Assisted Tumor Bed Coagulation and Traditional Suture Renorrhaphy in Laparoscopic Partial Nephrectomy