Abstract
Background & objective: Normal saline is the most commonly used fluid in traumatic brain injury (TBI) patients both in resuscitation and maintenance since long time but associated with hyperchloremic metabolic acidosis. Balanced salt solutions (BSS) are recently developed with favorable outcome in resuscitation and intraoperative as a maintenance fluid. We compared normal saline and BSS as maintenance fluids in TBI patients admitted to intensive care unit.
 Methodology: After institutional ethical committee approval and written informed consent from patients’ relatives, 100 patients who meet inclusion criteria were randomly divided into two equal groups; Group NS: to receive normal saline as a maintenance fluids and Group BSS: to receive BSS as a maintenance fluid. Data of serum electrolyte and acid base status were collected on day 1, 3, 5, 7 and 14. Patient outcome was evaluated on day-8. Data was analyzed with appropriate statistical tests. The P < 0.05 indicated that the difference was significant.
 Results: In both groups pH gradually increased over time and was more alkaline in normal saline group. Base excess was comparable between two groups. In normal saline group, serum sodium and chloride increased gradually and reached on the higher side on day-14, while potassium level dropped to a lower side. Twenty-eight days mortality was more in Group NS than the Group BSS.
 Conclusion: Balanced salt solution causes lesser alterations in acid base and electrolyte status than the normal saline and is associated with more favorable outcome.
 Abbreviations: TBI - Traumatic brain injury; BBB - Blood brain barrier; BSS - Balanced salt solution; ABG - Arterial blood gas analysis; GCS - Glasgow Comma Scale; RFT’s - Renal function tests; BE - Base excess
 Key words: Ringer's lactate; Sodium Chloride / pharmacology; Balanced salt solution; Double-Blind Method; Humans; Hydrogen-Ion Concentration; Isotonic Solutions / pharmacology; Potassium / blood
 Citation: Shephali, Singh Y, Mishra M, Sachan S, Pathak NM, Shankar R. Comparison of normal saline and balanced salt solution as a maintenance fluid on acids-base and electrolyte status in traumatic brain injury patients; a prospective randomized double-blind study. Anaesth. pain intensive care 2022;26(3):326-331. 
 DOI: 10.35975/apic.v26i3.1899
 Received: December 18, 2021; Reviewed: January 25, 2022; Accepted: February 02, 2022
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