title: Bipolar versus monopolar resection of benign prostate hyperplasia: a comparison of plasma electrolytes, hemoglobin and TUR syndrome.
abstract: BACKGROUND
  Bipolar and monopolar transurethral resection of prostate (TURP) are both widely used for surgical treatment of benign prostatic hyperplasia. Systemic absorption of irrigation fluids during TURP operations leads to variations in blood chemistry. The aim of this prospective clinical study was to compare two different surgical techniques and the systemic effects of irrigation solutions (5 % mannitol vs. 0.9 % sodium chloride) under standardized anesthesia care.
  
  
  METHODS
  Fifty-two patients who were scheduled for elective TURP were enrolled in the study. Patients were divided into two groups; the group M; 5 % mannitol was used for irrigation and the group B; 0.9 % sodium chloride was used for irrigation. Spinal anesthesia was performed to all patients. The patients' demographics, prostate volumes, hemodynamic parameters, volumes of irrigation, and IV fluids were recorded. Serum electrolytes (Na+, K+) and hemoglobin (Hb) were analyzed in blood samples taken before the operation (control), at the 45th min of the operation (1st measurement), and 1 h after the end of the surgery (2nd measurement) and recorded.
  
  
  RESULTS
  The Na+value of group M was significantly lower in both the 1st and 2nd measurements compared with the control value (p< 0.001 andp< 0.001). Na+values of group M were also significantly lower than group B in both the 1st and 2nd measurements (p< 0.001 andp< 0.001). The change in Na+levels was found to be statistically significant (p< 0.001) in group M, whereas the intergroup changes were not statistically significant in group B.
  
  
  CONCLUSIONS
  Our results demonstrated that bipolar resection coupled with 0.9 % sodium chloride has minimal effects on serum sodium levels compared with monopolar resection.Clinicaltrials.gov identifierNCT02681471.
authors: Department of Anesthesiology, Medical Faculty of Istanbul, Istanbul University, Istanbul Universitesi Tip Fakultesi, Anesteziyoloji AD, Millet Cad. Cerrahi Monoblok Giris Kati, Fatih, 34093 Istanbul, Turkey.
authors: Meltem Savran
authors: MS
authors: Karadeniz
authors: Department of Anesthesiology, Medical Faculty of Istanbul, Istanbul University, Istanbul Universitesi Tip Fakultesi, Anesteziyoloji AD, Millet Cad. Cerrahi Monoblok Giris Kati, Fatih, 34093 Istanbul, Turkey.
authors: Erdem
authors: E
authors: Bayazit
authors: Department of Anesthesiology, Medical Faculty of Istanbul, Istanbul University, Istanbul Universitesi Tip Fakultesi, Anesteziyoloji AD, Millet Cad. Cerrahi Monoblok Giris Kati, Fatih, 34093 Istanbul, Turkey.
authors: Omur
authors: O
authors: Aksoy
authors: Department of Anesthesiology, Medical Faculty of Istanbul, Istanbul University, Istanbul Universitesi Tip Fakultesi, Anesteziyoloji AD, Millet Cad. Cerrahi Monoblok Giris Kati, Fatih, 34093 Istanbul, Turkey.
authors: Emine Aysu
authors: EA
authors: Salviz
authors: Department of Urology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey.
authors: Tzevat
authors: T
authors: Tefik
authors: Department of Urology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey.
authors: Oner
authors: O
authors: Sanli
authors: Department of Anesthesiology, Medical Faculty of Istanbul, Istanbul University, Istanbul Universitesi Tip Fakultesi, Anesteziyoloji AD, Millet Cad. Cerrahi Monoblok Giris Kati, Fatih, 34093 Istanbul, Turkey.
authors: Mukadder Orhan
authors: MO
authors: Sungur
authors: Department of Anesthesiology, Medical Faculty of Istanbul, Istanbul University, Istanbul Universitesi Tip Fakultesi, Anesteziyoloji AD, Millet Cad. Cerrahi Monoblok Giris Kati, Fatih, 34093 Istanbul, Turkey.
authors: Kamil Mehmet
authors: KM
authors: Tugrul
keywords: 0.9 % Sodium chloride; 5 % Mannitol; Bipolar; Monopolar; Serum electrolytes; Transurethral resection of prostate