Predictive Factors of Renal Function in Partial Laparoscopic Nephrectomy in Patients with a Kidney Tumor

Background: Laparoscopic partial nephrectomy has proven to be an ideal option for tumors in initial stages, preserving part of the renal parenchyma and reducing the possible risk of glomerular filtration decrease. Objectives: The main objective of this study is to determine the factors that can influence, to a greater extent, renal function deterioration after surgery. Methods: This is an observational, descriptive and longitudinal study. The renal funct ion was calculated using the Chronic Kidney Disease Epidemiology Collaboration formula, and patients were divided into 2 groups depending on whether or not their renal function had been affected after surgery. We studied the correlation between the decrease of renal function and other variables. Results: The sample comprised 48 patients. In 30 of these cases, renal function had deteriorated after surgery. We observed a statistically significant relationship between the weight of the patient (p = 0.0230), size of the tumor (p = 0.0035), ischemic time (p = 0.0287), duration of the surgery (p = 0.0297), the RENAL score (p = 0.0230) and renal function deterioration. Conclusions: Partial laparoscopic nephrectomy is associated with a deterioration in renal function, where there is a decrease in glomerular filtration after surgery. The deterioration will depend on the weight of the patient, size of the tumour, ischemic time and duration of the surgery. The RENAL score can be used to predict said deterioration.