# A nurse is caring for a postoperative patient who suddenly becomes restless, with decreased urine output and cool, clammy skin, indicating signs of shock. Which assessment finding would be the MOST critical indicator requiring immediate intervention? > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=542736 > language: ko > subject: Fundamentals ## 문제 A nurse is caring for a postoperative patient who suddenly becomes restless, with decreased urine output and cool, clammy skin, indicating signs of shock. Which assessment finding would be the MOST critical indicator requiring immediate intervention? ## 보기 1. Blood pressure 80/50 mmHg with weak, thready pulse at 120 bpm **✔ 정답** 2. Respiratory rate of 28 breaths per minute with shallow breathing 3. Temperature of 99.2°F (37.3°C) with mild diaphoresis 4. Oxygen saturation of 92% on room air with slight confusion **정답: 1** ## 해설 Hypotension with compensatory tachycardia and weak pulse indicates cardiovascular compromise requiring immediate intervention to prevent organ failure. Other findings (respiratory distress, mild fever, slight hypoxia) are concerning but less immediately life-threatening. ## 심화 해설 Understanding the Clinical Scenario The patient is exhibiting classic signs of hypoperfusion and compensatory shock: restlessness (cerebral hypoxia), decreased urine output (renal hypoperfusion), and cool, clammy skin (peripheral vasoconstriction). The nurse must identify the finding that indicates decompensation and demands the most immediate intervention to prevent progression to irreversible shock. Analysis of Assessment Findings Option 1: Blood pressure 80/50 mmHg with weak, thready pulse at 120 bpm. This is the most critical indicator. A systolic blood pressure of 80 mmHg represents significant hypotension, indicating that compensatory mechanisms are failing and tissues are not being adequately perfused. The weak, thready pulse and tachycardia of 120 bpm are direct consequences of reduced stroke volume and the sympathetic nervous system's attempt to maintain cardiac output. This hemodynamic profile is a hallmark of shock decompensation. In the context of septic shock, which can arise from postoperative complications like an anastomotic leak or perforation, mortality is closely linked to the duration and severity of hypotension. Research on the timing of interventions in septic shock demonstrates that delays in restoring adequate perfusion pressure are associated with higher mortality rates [2]. Furthermore, if the underlying cause is hemorrhage, mortality is highest within the first 6 hours post-injury, making immediate recognition and intervention for hypotension a life-saving priority [3]. This finding demands an immediate, coordinated response, typically involving fluid resuscitation, vasopressor administration, and notification of the rapid response team. Option 2: Respiratory rate of 28 breaths per minute with shallow breathing. Tachypnea is an early and important compensatory sign of metabolic acidosis, often seen in shock as the body attempts to "blow off" CO2. While this finding requires close monitoring and intervention (e.g., oxygen therapy, preparing for potential intubation), it is a compensatory mechanism. The patient's immediate survival is more directly threatened by the profound hypotension and inadequate tissue perfusion indicated in Option 1. Option 3: Temperature of 99.2°F (37.3°C) with mild diaphoresis. A low-grade temperature and diaphoresis are non-specific findings. While diaphoresis can accompany the sympathetic surge in shock, this temperature reading is near normal and does not represent an immediate, life-threatening crisis. In septic shock, patients can present with hypothermia or hyperthermia, but this finding alone is not the most critical indicator for immediate intervention compared to hemodynamic collapse. Option 4: Oxygen saturation of 92% on room air with slight confusion. An SpO2 of 92% indicates hypoxemia, and confusion signals cerebral hypoxia. These are significant findings that require prompt oxygen administration. However, they are downstream effects of the core problem: inadequate oxygen delivery to tissues due to circulatory failure. The most direct and critical indicator of this circulatory failure is the profoundly low blood pressure and its associated pulse quality. Addressing the hypotension will improve perfusion to the brain and lungs, which is a higher priority than treating the hypoxemia in isolation. Clinical Reasoning and Priority Setting The nurse's priority is to identify the cue that signifies a transition from compensated to decompensated shock. The blood pressure and pulse in Option 1 provide direct evidence of failing cardiovascular function. This assessment aligns with the understanding that severe bleeding or sepsis can rapidly lead to life-threatening shock, where the primary therapeutic goal is to restore circulating volume and perfusion pressure [3,4]. A case of septic cardiomyopathy secondary to an intestinal perforation illustrates how quickly a patient can deteriorate into cardiogenic shock, requiring immediate hemodynamic support . The weak, thready pulse is a critical physical assessment finding that confirms the low blood pressure is not an artifact and that cardiac output is severely compromised, necessitating urgent intervention.References (research sources) - [2]Impact of Early versus Delayed Vasopressin Initiation on 28-Day Mortality in Older Adults with Septic Shock.Research articleLiu L, Shi H, Zhang L, Ma J. (2026) · DOI: 10.2147/tcrm.s583585 - [3]Management of Life-Threatening Bleeding: Application Of Learned Experiences from the Critical Care Clinical Trialists (3CT) Workshop.RCT/clinical trialCaillard A, Collins SP, Gurney JM, Kreitzer N, Maiga A, Shoamanesh A, Self WH, Mebazaa A. (2026) · DOI: 10.1097/shk.0000000000002735 ## 임상 시나리오 Clinical Practice Guide: Recognizing Decompensated Shock Rapid Assessment Protocol - **Primary Survey:** Immediately assess airway, breathing, and circulation (ABCs). In decompensated shock, the priority is circulatory support. - **Hemodynamic Monitoring:** Blood pressure and heart rate are key. A systolic BP below 90 mmHg or a mean arterial pressure (MAP) below 65 mmHg, coupled with a weak, thready pulse and tachycardia, signals failing compensation. - **Perfusion Assessment:** Evaluate end-organ perfusion. Look for decreased urine output (less than 0.5 mL/kg/hr), altered mental status (restlessness, confusion), and cool, clammy, or mottled skin indicating peripheral vasoconstriction. Immediate Nursing Interventions - **Activate Emergency Response:** Notify the Rapid Response Team or primary provider immediately upon recognizing signs of decompensated shock. - **Optimize Oxygenation:** Administer high-flow oxygen to maintain SpO2 above 94% to compensate for reduced oxygen delivery. - **Establish IV Access:** Secure two large-bore intravenous lines for rapid fluid resuscitation as ordered, typically with isotonic crystalloids. - **Prepare for Transfer:** Anticipate transfer to a higher level of care (e.g., ICU) for continuous monitoring and potential vasopressor support. Clinical Pearls for Postoperative Patients - **High-Risk Surgeries:** Abdominal and thoracic surgeries carry a higher risk for complications like hemorrhage or anastomotic leak leading to septic or hypovolemic shock. - **Trending Data:** A single set of vital signs is less informative than trending. A progressive drop in blood pressure and rise in heart rate over 15-30 minutes is a critical warning sign. - **Masking Effects:** Beta-blockers can blunt the tachycardic response, and chronic hypertension can make a "normal" blood pressure falsely reassuring in a patient who is actually hypotensive. ## 핵심 개념 - **Hypoperfusion** — Inadequate blood flow to organs and tissues, leading to impaired delivery of oxygen and nutrients, a hallmark of shock. - **Compensatory Shock** — The initial stage of shock where the body activates mechanisms like increased heart rate and vasoconstriction to maintain blood pressure and cardiac output. - **Decompensated Shock** — A progressive stage of shock where compensatory mechanisms fail, leading to hypotension, worsening tissue perfusion, and organ dysfunction. - **Stroke Volume** — The amount of blood pumped by the left ventricle of the heart in one contraction; reduced in hypovolemic and cardiogenic shock. - **Systemic Vascular Resistance** — The resistance to blood flow offered by all the systemic vasculature; increased in compensatory shock due to vasoconstriction to shunt blood to vital organs. ## 같은 주제 문제 - [A nurse is caring for a postoperative patient who underwent major abdominal surgery 48 hou…](https://mymerci.kr/pages/nclex_q.php?qn_id=542729) - [A nurse is assessing a patient who underwent exploratory laparotomy for bowel obstruction …](https://mymerci.kr/pages/nclex_q.php?qn_id=542730) - [A nurse is caring for a 65-year-old postoperative patient who underwent major abdominal su…](https://mymerci.kr/pages/nclex_q.php?qn_id=542731) - [A nurse is caring for a 60-year-old postoperative patient who underwent hip replacement su…](https://mymerci.kr/pages/nclex_q.php?qn_id=542732) - [A nurse is caring for a 70-year-old postoperative patient with a history of COPD who under…](https://mymerci.kr/pages/nclex_q.php?qn_id=542733) - [A nurse is caring for a 30-year-old postoperative patient who underwent emergency appendec…](https://mymerci.kr/pages/nclex_q.php?qn_id=542734) - [A nurse is caring for a 60-year-old postoperative patient who underwent laparoscopic chole…](https://mymerci.kr/pages/nclex_q.php?qn_id=542735) --- More free questions: [기출문제](https://mymerci.kr/) _학습 참고용입니다. 실제 임상은 최신 지침과 소속 기관 프로토콜을 따르세요._