Application of three-dimensional reconstruction of renal tumor vessels to guide laparoscopic partial nephrectomy of hilar tumors and non-hilar tumors under zero ischemia

Abstract Objective: To investigate the safety and efficacy of three-dimensional reconstruction of renal tumor vessels to guide laparoscopic partial nephrectomy of hilar tumors and non-hilar tumors under zero ischemia. Methods: The clinical data of 82 patients with renal cancer who underwent zero ischemia retroperitoneal laparoscopic partial nephrectomy in the department of urology of our hospital from January 2018 to January 2021 were retrospectively reviewed. The patients were divided into hilar group and non-hilar group. The clinical data of all patients were statistically analyzed by t-test or χ². Results: There was no significantly difference in gender, age, tumor diameter and pathological stage between hilar and non-hilar tumor group.Most of the target vessels in the hilar tumor group were single targets, while most of the target vessels in the non-hilar tumor group were multiple targets (P<0.05). There was no significantly difference between the groups for mean operative time and length of stay. But hilar tumor group had significantly longer operation time (109.3±9.2 vs. 90.3±9.5 min, p<0.001). There was no significant difference in renal GFR and serum creatinine between the two groups. Hilar tumor group had no significantly difference of change of creatinine and GFR at post-operative 6 and 12 months as compared with non-hilar tumor group. There were no bleeding, urinary leakage, infection and other related complications in the two groups after 1 month follow-up. After 12 months of follow-up, there was no tumor recurrence and metastasis in the two groups. Conclusion: The application of three-dimensional renal tumor vascular reconstruction technology can better realize laparoscopic zero ischemia nephron sparing surgery. The target vessels of patients with hilar, single and early renal cancer are easier to find, which is more suitable for three-dimensional renal tumor vascular reconstruction technology to implement laparoscopic zero ischemia nephron sparing surgery.