After recognition of systemic inflammatory response syndrome, what is the first step in management?

• A. Administer IV fluids and obtain cultures, then start broad-spectrum IV antibiotics within 1 hour
• B. Begin IV fluids only
• C. Start antibiotics after cultures return
• D. Observe and treat supportively without antibiotics initially

Answer: (B)

The first step is to start aggressive IV crystalloid resuscitation to restore intravascular volume and perfusion. In SIRS, inflammatory mediators cause vasodilation and capillary leak, which reduces effective circulating blood volume and can lead to hypotension and organ hypoperfusion. Giving isotonic fluids quickly increases preload, improves cardiac output, and helps maintain blood pressure and perfusion to critical organs.

Antibiotics and cultures are crucial if infection is suspected (sepsis), but they are addressed after initial stabilization. Obtain cultures if feasible without delaying resuscitation, and initiate broad-spectrum antibiotics promptly once sepsis is suspected, ideally after fluids have begun and within a short time frame. Observing or waiting without fluids would allow ongoing hypoperfusion and organ injury, so fluids come first to correct the hemodynamic derangement.