A nurse is caring for a 60-year-old postoperative patient who underwent hip replacement surgery 4 hours ago and suddenly develops signs of hypovolemic shock with blood pressure 80/50 mmHg, heart rate 120 bpm, weak pulse, cool clammy skin, and decreased urine output. Which nursing intervention should be the nurse's FIRST priority?

In hypovolemic shock, the priority is to restore circulating volume via large-bore IV access and fluid resuscitation to prevent organ failure. Other options like pain medication or Trendelenburg position are secondary or not evidence-based.

Clinical Priority Setting in Acute Postoperative Hypovolemic Shock

The patient is exhibiting classic signs of decompensated hypovolemic shock, a life-threatening condition resulting from a critical loss of intravascular volume. In the context of a recent hip replacement, this is likely due to significant blood loss into the surgical site. The presented vital signs—blood pressure 80/50 mmHg and heart rate 120 bpm—indicate that compensatory mechanisms are failing, leading to impaired oxygen delivery to vital organs ^[1]. The nurse's immediate priority must address the root cause of this hemodynamic instability: the profound lack of circulating volume.

The first and most critical intervention is to establish large-bore IV access and initiate fluid resuscitation. This action directly aligns with the foundational principle of shock management, which is to restore intravascular volume and improve tissue perfusion. The evidence synthesis by Wang et al. emphasizes that prompt fluid resuscitation is critical, with nurses playing a central role in early recognition and timely intervention ^[1]. A large-bore catheter (e.g., 18-gauge or larger) is essential to facilitate the rapid infusion of isotonic crystalloids or blood products, as dictated by the Poiseuille's law, where flow rate is directly proportional to the fourth power of the catheter's radius. Delaying this step to perform other tasks prolongs the state of cellular hypoxia and increases the risk of progression to irreversible shock and multi-organ failure.

The other options are not the first priority. Administering pain medication (Option 2) is contraindicated in this scenario. Opioids and other analgesics can cause vasodilation and further depress the already compromised cardiovascular system, potentially precipitating a complete cardiovascular collapse. Placing the patient in the Trendelenburg position (Option 3) is an outdated and unsupported practice for hypovolemic shock. This position does not effectively improve venous return and can instead increase intracranial pressure, impair pulmonary gas exchange by pushing abdominal contents against the diaphragm, and increase cardiac afterload. Obtaining blood samples for laboratory analysis (Option 4) is an important diagnostic step but is secondary to the life-saving intervention of fluid resuscitation. While a complete blood count (CBC) and electrolytes will guide ongoing therapy, the immediate threat to the patient's life is the lack of perfusion, which must be corrected without delay. The case review by Eraky et al. reinforces that management must be guided by a thorough understanding of physiology, where addressing the hemodynamic derangement takes precedence over rigid protocol-driven diagnostics .