Hypovolemic Shock Emergency Intervention

A 74-year-old female patient is brought to the emergency department after a fall at home. She is disoriented and unable to provide a clear history. Initial assessment reveals an elevated heart rate of 130 bpm, a blood pressure of 80/50 mmHg, and respiratory distress with labored breathing. The nurse suspects hypovolemic shock due to possible internal bleeding. Which of the following immediate interventions is critical for this patient's management? Fill in the blank: The nurse should initiate ____.