Four hours later, despite receiving prescribed antibiotics a…

Fоur hоurs lаter, despite receiving prescribed аntibiоtics аnd supplemental oxygen, the nurse notes a change in R.T.'s condition. 1130 Supplemental oxygen increased from 2 L/min nasal cannula to 4 L/min BP: 96/58 mmHg HR: 118 beats/min RR: 34 breaths/min Temp: 102.2°F (39.0°C) SpO₂: 86% on 4L NC Increasingly restless and anxious Bilateral crackles now present Accessory muscle use noted An arterial blood gas is obtained: pH 7.31 (ref: 7.35 - 7.45) PaCO₂ 48 mmHg (ref: 35 - 45 mmHg) PaO₂ 54 mmHg (ref: 80 - 100 mmHg) HCO₃⁻ 23 mEq/L (22 - 26 mEq/L) Question: The nurse analyzes the new findings. Which findings provide evidence that R.T. is developing acute respiratory failure? Select all that apply