IV Rescue Hydration: Evidence-Based Approach

Choice of Fluid

Balanced crystalloid solutions, such as Ringer's Lactate or Plasmalyte, are preferred over 0.9% NaCl for critically ill patients, especially when high volumes are needed, as they are associated with better acid-base balance and potentially lower mortality 1, 2
Hypertonic saline solutions are not recommended as first-line treatment for rescue hydration as they show no mortality benefit 4, 5
Synthetic colloids are not recommended due to increased risk of renal failure and haemostasis disorders 2
Albumin is generally not recommended for routine rescue hydration due to higher cost without demonstrated benefit over crystalloids 2

For sepsis-induced hypoperfusion, at least 30 ml/kg of IV crystalloid fluid should be given within the first 3 hours 6
Goal-directed therapy with frequent reassessment of hemodynamic status to guide additional fluid administration is essential to prevent fluid overload 6
Dynamic variables, such as pulse pressure variation, stroke volume variation, should be used over static variables, like central venous pressure, to predict fluid responsiveness where available 6

Reassessment should include thorough clinical examination and evaluation of physiologic variables, such as heart rate, blood pressure, arterial oxygen saturation, respiratory rate, temperature, urine output 6
An initial target mean arterial pressure of 65 mmHg is recommended in patients requiring vasopressors 6
Normalization of lactate levels should be a resuscitation goal in patients with elevated lactate as a marker of tissue hypoperfusion 6

In patients with traumatic brain injury and focal neurological signs, a bolus of hypertonic saline may be beneficial due to its osmotic effect, despite not being recommended for routine use 5

Avoid fluid overload, which is associated with worse outcomes and increased mortality 3
Avoid waiting for hemodynamic worsening before initiating fluid resuscitation 3
Consider patient-specific factors, such as age, weight, and pre-existing renal and/or cardiac conditions, when determining fluid volume 3