What is the role of lactate and base deficit in trauma resuscitation?

• A. They indicate liver function
• B. They indicate electrolyte balance
• C. They reflect tissue perfusion and shock severity; trending values guide resuscitation progress
• D. They predict infection risk

Answer: (C)

The main idea is that lactate and base deficit reveal how well tissues are being perfused during trauma resuscitation and how severe the shock is, with their trends guiding how you adjust treatment. When perfusion is poor, tissues switch to anaerobic metabolism and lactate accumulates; base deficit reflects the amount of metabolic acidosis from this process. As you restore perfusion, lactate should begin to decrease and the base deficit should lessen (become less negative). If these values remain high or worsen, it signals ongoing hypoperfusion and the need to escalate resuscitation efforts. They provide dynamic feedback on the patient’s metabolic state, which helps determine whether you’re over- or under-resuscitating and when to advance fluids, blood products, or other interventions.

They’re not direct indicators of liver function, nor primary measures of electrolyte balance, and they don’t specifically predict infection risk.