Serum sodium and potassium changes during transurethral resection of prostate gland in patients under subarachnoid block

Abstract

Background: Electrolyte disturbances often occur during TURP procedure. These disturbances should be fully corrected because it leads to increased morbidity and mortality rate. Aims: To study changes occurring in serum sodium and potassium levels during TURP under SA block and to study other factors like volume of irrigation fluid absorbed, resection time, amount of the gland resected and concurrent hemodynamic changes occurring during procedure. Methodology: 75 patients of ASA I, II, and III class in age group of 41 to 80 years with benign prostatic hyperplasia planned for elective transurethral resection of prostate gland under subarachnoid block were selected for the study and assigned into two groups: Group 1:-Resection time less than 45 minutes Group 2:-Resection time more than 45 minutes and Intraoperative blood sample was taken at 40 minutes and another sample taken 30 minutes after end of procedure. Results: In intraoperative period the mean sodium was 138.46±2.94 and 138.68±2.34 (statistically insignificant; P-value 0.733) and mean serum potassium was 4.05±0.34 and 4.09±0.28 (statistically insignificant; P-value 0.5450. In post-operative period mean serum sodium in two group was 137.93±3.16 and 136.97±2.17 (statistically insignificant; P-value=0.137) and mean serum potassium in two group was 4.12±0.30 and 4.47±0.31 (statistically significant; P-value <0.001). Conclusions: In TURP surgries there occur increase in serum potassium levels which shows statistically significant difference when surgery duration exceeds 45 minutes; in both intraoperative and post-operative periods.