Final answer:
The first step in managing a patient with an acute GI bleed is to administer intravenous fluids to stabilize the patient and address fluid loss.
Step-by-step explanation:
The first step in the management of a patient with an acute gastrointestinal (GI) bleed is to administer intravenous fluids. This initial approach is aimed at stabilizing the patient by replacing lost fluids and maintaining blood pressure. Once the patient is stabilized, further diagnostic and therapeutic procedures, such as an upper endoscopy and consultation with a gastroenterologist, can be performed. Additionally, a complete blood count (CBC) is often ordered to assess the patient's hemoglobin level and other blood parameters indicative of blood loss or anemia.