Preoperative Super-Selective Embolization versus "On-Clamp" Laparoscopic Partial Nephrectomy for T1 Renal Tumors- A...

Area of Science:

• Urology
• Surgical Oncology
• Interventional Radiology

Background:

• Laparoscopic partial nephrectomy (LPN) is a standard treatment for T1 renal tumors.
• Minimizing intraoperative blood loss and preserving renal function are key goals in LPN.
• On-clamp LPN involves temporary renal artery occlusion, potentially affecting renal function.

Purpose of the Study:

• To compare intraoperative and post-operative outcomes of on-clamp LPN versus LPN with preoperative super-selective angioembolization.
• To evaluate the impact of preoperative angioembolization on blood loss, operative time, and renal function.

Main Methods:

• A randomized clinical study involving adult patients with T1 renal tumors.
• Patients were randomized (1:1) to either preoperative angioembolization followed by LPN or conventional on-clamp LPN.
• Diethylenetriamine pentaacetate scans were performed preoperatively and at 1-month follow-up to assess renal function (eGFR).

Main Results:

• Preoperative angioembolization group showed significantly less blood loss (145 mL vs. 261 mL, P < 0.01).
• No significant difference in post-operative eGFR at 1 month between the two groups (P = 0.71).
• One patient in the embolization group required radical nephrectomy due to complications; four patients in the embolization group required clamping due to inadequate embolization.

Conclusions:

• Preoperative super-selective angioembolization followed by LPN offers improved outcomes regarding blood loss and operative time compared to conventional on-clamp LPN.
• Preoperative embolization does not significantly affect the change in estimated glomerular filtration rate (eGFR) at 1 month post-surgery.
• Angioembolization is a viable adjunct to LPN for improving surgical efficiency and reducing hemorrhage.