You are called to assess a 4-year-old client who has suffered second and third-degree burns to her chest, abdomen, and legs. It is estimated that about 40% of her total body surface area (TBSA) is burned. Upon assessment, her vital signs are as follows:

• HR: 140
• RR: 44
• BP: 90/60
• SpO2: 88% on Room Air

Which of the following interventions is the priority?