In the emergent phase, which hemodynamic parameter is typically around 70?

• A. Heart rate 40-60
• B. MAP around 70
• C. Central venous pressure 20
• D. Systolic BP 120

Answer: (B)

Mean arterial pressure (MAP) is the best single indicator of overall organ perfusion during burn resuscitation. In the emergent phase, large fluid shifts from capillary leak can drop intravascular volume, so clinicians target a MAP around 70 mmHg to ensure organs like the brain, heart, and kidneys receive sufficient blood flow while fluids are being restored. This value sits within the commonly accepted perfusion range (roughly 65–70 mmHg) and guides how aggressively to fluid-resuscitate.

The other options don’t fit the typical emergent-phase picture. A heart rate in the 40s to 60s would be unexpectedly slow in this context where pain, stress, and hypovolemia usually drive tachycardia. A central venous pressure around 20 cm H2O (about 15 mmHg) implies a higher preload than expected with capillary leak and hypovolemia. Systolic blood pressure around 120 is often not maintained early on due to fluid loss; systolic alone is less reliable for perfusion status than MAP in this setting.