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ORIGINAL ARTICLE
Year : 2020  |  Volume : 14  |  Issue : 1  |  Page : 72-74

To compare the changes in hemodynamic parameters and blood loss during percutaneous nephrolithotomy – General anesthesia versus subarachnoid block


1 Department of Anesthesiology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
2 Department of Anesthesiology and Critical Care Medicine, Dr. Ram Manohar Lohia Institute of Medical Sciences, Lucknow, Uttar Pradesh, India

Correspondence Address:
Dr. Soumya Sankar Nath
Department of Anaesthesiology and Critical Care Medicine, Dr. Ram Manohar Lohia Institute of Medical Sciences, Vibhuti Khand, Gomtinagar, Lucknow - 226 010, Uttar Pradesh
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/aer.AER_14_20

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Background: Percutaneous nephrolithotomy (PCNL) is done under general anesthesia (GA) in most of the centers. However, associated complications and cost are higher for GA than for regional anesthesia. Aim: The aim of the study was to compare the efficacy of GA versus subarachnoid block (SAB) with regard to intraoperative blood loss and postoperative drop in hemoglobin (Hb) in patients undergoing PCNL. Setting and Design: This prospective, randomized, comparative clinical trial was carried out at a tertiary care hospital. After obtaining the institute ethical committee clearance (vide no 57/15), patients were randomly allocated into two groups using table of randomization (n = 30 each), Group A – GA, Group B – SAB. Materials and Methods: Intraoperative blood loss was assessed by measuring the Hb of irrigated fluid and postoperative drop in Hb concentration. Other parameters such as intraoperative mean arterial pressure and heart rate were also compared in these groups. Statistical Analysis: The results are presented in frequencies, percentages, and mean ± standard deviation. The Chi-square test was used to compare the categorical variables between the groups. Unpaired t-test was used to compare the continuous variables between the groups. Results: Hemodynamic parameters were similar in both the groups preoperatively. The Hb drop was significant in Group A (1.28 ± 0.35 g.dl−1) as compared to Group B (1.10 ± 0.67 g.dl−1). On calculating Hb in irrigated fluid-blood mixture, it was found to be significantly higher in Group A (1.87 ± 0.44 g.L−1) as compared to Group B (1.25 ± 0.25 g.L−1). Conclusions: Both GA and SAB are effective and safe in PCNL. However, SAB is associated with less blood loss as estimated by intraoperative blood loss and Hb drop.


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