Unnecessary fluid therapy in patients with shock: Five classic fluid pitfalls and five ways to do it better.

Intravenous fluid therapy remains a cornerstone of shock management, yet is frequently misapplied. Unnecessary administration can lead to avoidable harm, including fluid accumulation, electrolyte disturbances, and delayed recovery. Despite good intentions, clinicians often fall into predictable patterns that drive overinfusion. Recognizing and correcting these habits is an important step toward safer and more effective fluid management, which may contribute to better patient outcomes. This narrative review highlights five recurring pitfalls in fluid management: confusion between resuscitation, maintenance, and replacement indications; failure to account for hidden fluid sources; underestimation of the impact of sodium burdens; reflexive fluid administration in response to misinterpreted markers such as hyperlactatemia, low central venous pressure or reduced urine output; and finally, a narrow focus on fluid responsiveness without consideration of fluid tolerance. To address these challenges, we propose a pragmatic, physiology-based approach to fluid stewardship. Key strategies include adopting a phase-based model for fluid therapy, minimizing unnecessary sodium and chloride exposure, interpreting fluid balance data with caution, initiating early vasopressor support when appropriate, and employing structured de-resuscitation (and preventive) strategies rather than relying solely on loop diuretics. Thoughtful, physiology-driven fluid therapy requires more than reflexes, fixed volumes and flowcharts, it demands context-sensitive, physiology-informed decision-making. By recognizing common mistakes and adopting simple yet powerful principles, clinicians can shift from automatic to analytic and from flood to finesse.