A nurse is caring for a 65-year-old postoperative patient who underwent major abdominal surgery 6 hours ago and suddenly develops signs of hypovolemic shock with blood pressure 80/50 mmHg, heart rate 120 bpm, and decreased urine output. Which nursing intervention should be the nurse's FIRST priority?
A 45-year-old patient underwent major abdominal surgery 6 hours ago and is now showing signs of hypovolemic shock with blood pressure 80/50 mmHg, heart rate 120 bpm, and decreased urine output.
1Establish large-bore IV access and initiate fluid resuscitation✓ 정답
2Administer prescribed vasopressor medications
3Place the patient in Trendelenburg position
4Obtain blood samples for laboratory analysis
해설
In hypovolemic shock, the first priority is to optimize tissue perfusion and oxygenation by positioning and oxygen therapy per ABCDE approach. Other interventions (vasopressors, lab tests) follow after initial stabilization.
The patient is demonstrating classic signs of hypovolemic shock: hypotension (80/50 mmHg), reflex tachycardia (120 bpm), and decreased urine output. This condition results from a critical reduction in intravascular volume, which impairs oxygen delivery to vital organs [1]. In the immediate postoperative period following major abdominal surgery, potential causes include ongoing surgical bleeding or significant third-spacing of fluids. The pathophysiological priority is to restore circulating volume to improve cardiac output and tissue perfusion.
Prioritization Using the ABC Framework and Clinical Urgency
In the management of hypovolemic shock, the primary "C" (Circulation) issue is a profound volume deficit. The body's compensatory mechanisms, such as tachycardia, are failing, evidenced by the critically low blood pressure. The most immediate and effective intervention to address this circulatory collapse is to restore intravascular volume. Evidence-based guidelines for fluid resuscitation in hypovolemic shock emphasize that early, aggressive fluid therapy is the cornerstone of initial management, and nurses play a central role in its prompt initiation [1]. An evidence-based fluid resuscitation protocol aims to stabilize hemodynamics and prevent further complications by prioritizing volume replacement [2].
Analysis of Options
- Option 1: Establish large-bore IV access and initiate fluid resuscitation. This is the correct first priority. A large-bore intravenous catheter is essential to administer fluids at the rapid rate required to counteract severe hypovolemia. Initiating fluid resuscitation with crystalloids directly addresses the root cause of the shock state—the critical lack of circulating volume—and is the foundational step upon which all other therapies depend [1][2].
- Option 2: Administer prescribed vasopressor medications. Vasopressors can constrict blood vessels and raise blood pressure, but they do not correct the underlying problem of volume loss. In a profoundly volume-depleted patient, vasopressors may worsen tissue perfusion by further constricting an already empty vascular bed. Fluid resuscitation must precede the use of vasopressors to ensure they are effective and safe [1].
- Option 3: Place the patient in Trendelenburg position. The Trendelenburg position was historically used to promote venous return, but current evidence does not support its routine use. It can impair respiratory mechanics, increase intracranial pressure, and does not effectively address the central problem of volume loss. It is not a priority intervention over definitive volume replacement.
- Option 4: Obtain blood samples for laboratory analysis. While laboratory tests, including a complete blood count and type and crossmatch, are crucial for identifying the cause of shock and guiding ongoing therapy, they are a secondary priority. The immediate threat to life is inadequate tissue perfusion, which requires immediate intervention. Blood samples can be drawn simultaneously after IV access is established and fluid resuscitation has begun [1].
The synthesis of best evidence for fluid resuscitation in hypovolemic shock confirms that the nurse's first priority is to ensure reliable vascular access and begin volume replacement to rapidly restore hemodynamic stability [1][2].
References (research sources)
[1]
Best evidence for fluid resuscitation nursing in hypovolemic shock patients in emergency care based on GRADE system.Research articleWang Y, Lin J, Lin Y. (2026) · DOI: 10.2478/abm-2026-0009
[2]
Evidence-Based Fluid Resuscitation Protocol for Patients With Acute Gastrointestinal Hemorrhage: An Evidence Summary.Research articleChen Y, Dai L, Guo Q, Yang S. (2026) · DOI: 10.1177/00469580261435485
Clinical Practice Guide: Immediate Management of Postoperative Hypovolemic Shock
This guide outlines the nurse's immediate priorities when a postoperative patient develops signs of hypovolemic shock, emphasizing the critical first steps based on the ABC framework and current evidence.
Postoperative Context: Suspect ongoing surgical bleeding or significant third-spacing of fluids into the interstitial space.
Immediate Action: Activate the rapid response team or escalate care per facility protocol while simultaneously initiating interventions.
2. First-Priority Nursing Intervention: Circulation Support
Establish Large-Bore IV Access: Insert at least one, ideally two, large-bore (14-18 gauge) peripheral IV catheters. These short, wide catheters minimize resistance and allow for the rapid infusion of fluids.
Initiate Fluid Resuscitation: Begin rapid infusion of warmed isotonic crystalloids (e.g., Lactated Ringer's or 0.9% Sodium Chloride) as prescribed or per protocol. An initial bolus of 500-1000 mL is common, with continuous reassessment of response.
Monitor Response: Closely track blood pressure, heart rate, urine output, and mental status. The goal is to restore tissue perfusion, not necessarily achieve a normal blood pressure immediately.
3. Subsequent and Supportive Interventions
Vasopressors: Administer only after fluid resuscitation has been initiated and if hypotension persists despite adequate volume replacement. Using them on an empty vascular bed can cause severe vasoconstriction and worsen tissue ischemia.
Positioning: Keep the patient supine. The Trendelenburg position is no longer recommended as it does not improve cardiac output, may impair respiratory mechanics, and increases the risk of aspiration.
Diagnostics: Obtain blood samples (e.g., CBC, coagulation studies, type and crossmatch, lactate) concurrently with or immediately after initiating fluid therapy. Do not delay volume replacement for lab draws.
Identify the Source: Prepare the patient for potential return to the operating room or further diagnostic imaging to control the source of bleeding.
4. Ongoing Nursing Considerations
Reassessment: Continuously evaluate the patient's response to fluids every 5-15 minutes. Watch for signs of fluid overload (e.g., crackles, JVD, dyspnea) once the initial deficit is corrected.
Documentation: Meticulously document the time of onset, interventions performed, fluids administered, and the patient's hemodynamic response.
Communication: Provide clear, concise handoff to the surgical and critical care teams using a structured tool like SBAR.
Hypovolemic Shock — A life-threatening condition caused by a critical loss of intravascular volume, leading to inadequate tissue perfusion and oxygen delivery.
Fluid Resuscitation — The rapid administration of intravenous fluids, typically isotonic crystalloids, to restore circulating blood volume and improve hemodynamics.
ABC Framework — A prioritization model in emergency care: Airway, Breathing, Circulation. In shock, the immediate 'C' (Circulation) issue takes precedence.
Third-Spacing — The shift of fluid from the intravascular space into interstitial or non-functional body compartments, a common cause of postoperative hypovolemia.
Large-Bore IV Access — A short, wide-gauge intravenous catheter (e.g., 14-18 gauge) placed to allow for rapid infusion of large volumes of fluid.