Final answer:
The patient with signs of hypovolemic shock needs immediate IV/IO access for fluid administration, typically with isotonic crystalloid solutions like 0.9% sodium chloride or lactated Ringer's solution to restore blood volume.
Step-by-step explanation:
The patient described is showing signs consistent with hypovolemic shock, which in children can be due to severe dehydration, often from causes such as vomiting or diarrhea. In such a critical state, characterized by symptoms of fever (febrile), lethargy, rapid heart rate (tachycardia), rapid, shallow breathing (apthypneic), low blood pressure (hypotension), and delayed capillary refill time, the patient requires immediate intravenous (IV) or intraosseous (IO) access for fluid administration. The typical treatment involves replenishing bodily fluids, which is often achieved with the administration of isotonic crystalloid solutions such as 0.9% sodium chloride (normal saline) or lactated Ringer's solution. These solutions are essential for restoring circulating volume and improving blood pressure and perfusion. Additional medications may include vasoactive drugs to support blood pressure if necessary.