What is the first priority for a patient with a history of vomiting and diarrhea, BP of 85/60, and HR of 105?

In a patient presenting with a history of vomiting and diarrhea, along with hypotension (blood pressure of 85/60) and tachycardia (heart rate of 105), the first priority is to replace fluid loss. This situation suggests that the patient is likely experiencing significant dehydration due to the combination of vomiting and diarrhea, which can quickly lead to hypovolemic shock if not addressed promptly.

Restoring fluid balance is essential because low blood pressure indicates that the body's circulatory system is compromised, and elevated heart rate suggests that the heart is compensating for reduced blood volume. Immediate fluid replacement can help stabilize blood pressure, improve tissue perfusion, and address the patient's overall fluid deficit.

While identifying the source of infection, preventing nutritional deficits, and relieving nausea are all important aspects of patient care, they would follow the urgent need for fluid resuscitation in this scenario. Without addressing the fluid loss first, other interventions may not be effective or necessary if the patient's condition worsens due to dehydration. Thus, prioritizing fluid replacement directly addresses the critical issues at hand.