# A 45-year-old patient with a closed femur fracture sustained in a motor vehicle accident is admitted to the orthopedic unit. Eight hours post-injury, the patient develops sudden onset of confusion, petechial rash on the chest and neck, and severe dyspnea with oxygen saturation dropping to 88%. What is the nurse's priority action? > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=541013 > language: ko > subject: Adult Health ## 문제 A 45-year-old patient with a closed femur fracture sustained in a motor vehicle accident is admitted to the orthopedic unit. Eight hours post-injury, the patient develops sudden onset of confusion, petechial rash on the chest and neck, and severe dyspnea with oxygen saturation dropping to 88%. What is the nurse's priority action? ## 보기 1. Administer prescribed pain medication and reassess in 30 minutes 2. Elevate the head of the bed and apply supplemental oxygen via nasal cannula 3. Notify the physician immediately and prepare for emergency intubation **✔ 정답** 4. Obtain arterial blood gas samples and monitor vital signs every 15 minutes **정답: 3** ## 해설 The patient shows classic fat embolism syndrome (FES) signs: confusion, petechial rash, and severe dyspnea with hypoxemia. Immediate notification of the physician and preparation for emergency intubation are the priority to prevent respiratory failure. Other options are less urgent or inappropriate for this life-threatening condition. ## 심화 해설 Clinical Presentation & Pathophysiology The patient is exhibiting the classic triad of Fat Embolism Syndrome (FES): acute respiratory distress, neurologic dysfunction (confusion), and a petechial rash. This condition typically manifests 12–72 hours after a long bone fracture, though onset can occur earlier, as seen here at 8 hours post-injury. The underlying mechanism involves the release of fat globules from the bone marrow into the venous system, which then travel to the pulmonary capillaries and cerebral circulation, causing mechanical obstruction and an inflammatory cascade. The sudden drop in oxygen saturation to 88% indicates severe hypoxemia due to ventilation-perfusion mismatch and developing acute respiratory distress syndrome (ARDS), a hallmark of severe FES. The presence of confusion points to cerebral fat emboli, which can be triggered or exacerbated by factors such as intramedullary reaming during surgical fixation [3]. Priority Action & Rationale The correct answer is to notify the physician immediately and prepare for emergency intubation. In the context of FES, rapid clinical deterioration is common. The patient’s severe dyspnea, critically low oxygen saturation, and altered mental status signal impending respiratory failure. Supportive care, primarily ensuring a patent airway and adequate oxygenation through mechanical ventilation, is the cornerstone of management and must be initiated without delay [2,4]. While elevating the head of the bed and applying oxygen (Option 2) are appropriate initial steps, they are insufficient for a patient in severe distress with refractory hypoxemia. Obtaining arterial blood gases (Option 4) provides valuable diagnostic information but should not delay life-saving airway intervention. Administering pain medication (Option 1) is a low-priority action that does not address the immediate threat to airway and breathing. Clinical Correlation with Evidence The urgency of this scenario is supported by the high mortality associated with FES. A recent cohort study found that among patients with long bone fractures who developed FES, the condition carried a significant mortality rate, underscoring the need for immediate, aggressive supportive care [1]. The development of neurologic symptoms, such as confusion, is a particularly ominous sign. A case report of cerebral FES triggered during femoral reaming highlights how neurologic manifestations signal severe systemic involvement and the potential for rapid decline [3]. Furthermore, even in cases where the classic petechial rash is absent, the combination of hypoxemia and altered mental status following a long bone fracture should prompt immediate preparation for respiratory support, as mechanical ventilation was a required intervention in an atypical FES presentation [4]. The administration of corticosteroids, such as methylprednisolone, has been used in suspected cases, as noted in a case where it was given for suspected FES after pulmonary thromboembolism was ruled out, but pharmacologic therapy is secondary to securing the airway [2].References (research sources) - [1]Incidence, mortality, and factors associated with fat embolism syndrome in patients with long bone fractures at a trauma referral center in Bogotá, Colombia: 2016-2019 and 2022-2023.Research articleBernal OYG, Lozano NRC, Cordero JFB, Tenjo EAA, Lazaro JS, Acosta DCB, Aguilera CSQ, Valero JDG, Bautista LAG, Rico DLG, Niño AP. (2026) · DOI: 10.1007/s00068-026-03104-9 - [2]Fat embolism syndrome following femoral shaft fracture: A case report and diagnostic considerations.Case reportGholipour M, Salimi M, Motamedi A, Abbasi F. (2025) · DOI: 10.1016/j.radcr.2024.10.126 - [3]Deterioration and Manifestation of Cerebral Fat Embolism Triggered by Bone Reaming During Femur Fracture Surgery: A Case Report.Case reportNakada D, Hino H, Okuma N, Fujimoto Y, Miyashita M, Matsuura T, Mori T. (2025) · DOI: 10.1002/ccr3.70806 - [4]Atypical presentation of fat embolism syndrome: A case report.Case reportShin SW, Goncalves BS, Seabra LM, Coelho HA, Sansoni TM, Calderan TRA, Pinto VGS, Hirano ES, Carmona CV. (2025) · DOI: 10.1016/j.tcr.2025.101150 ## 임상 시나리오 Fat Embolism Syndrome: Emergency ResponseRecognizing and acting on the triad in post-fracture patients Suspect Fat Embolism Syndrome (FES) in any patient with a long bone fracture who develops the classic triad: respiratory distress, neurological changes, and a petechial rash. Onset is typically 12-72 hours post-injury. The priority is airway and breathing support. A sudden drop in oxygen saturation (e.g., to 88%) with severe dyspnea signals impending respiratory failure, often progressing to ARDS. Immediate physician notification and preparation for emergency intubation and mechanical ventilation are critical. CautionDo not delay definitive airway management for diagnostic procedures like ABG sampling or supportive measures like supplemental oxygen alone. Rapid clinical deterioration is common, and early intubation is the cornerstone of management. ## 핵심 개념 - **Fat Embolism Syndrome (FES)** — A serious complication following long bone fractures where fat globules enter the bloodstream, causing a classic triad of respiratory distress, cerebral dysfunction, and petechial rash. - **Petechiae** — Pinpoint, non-blanching red or purple spots on the skin caused by minor hemorrhage from broken capillary blood vessels, a pathognomonic sign of FES when found on the chest and neck. - **Pathognomonic** — A sign or symptom that is so characteristic of a disease that it can be used to make a diagnosis. - **Exosomes** — Nanoscale extracellular vesicles released from cells that carry proteins, lipids, and nucleic acids, acting as mediators in the systemic inflammatory cascade of FES. - **Ventilation-Perfusion Mismatch** — An imbalance between the amount of air reaching the alveoli and the amount of blood flowing to the alveoli, leading to hypoxemia as seen in FES. ## 같은 주제 문제 - [A nurse is assessing a 32-year-old patient who sustained a closed tibia fracture 36 hours …](https://mymerci.kr/pages/nclex_q.php?qn_id=541006) - [A nurse is assessing a 45-year-old patient who sustained a closed femur fracture 48 hours …](https://mymerci.kr/pages/nclex_q.php?qn_id=541007) - [A nurse is assessing a 58-year-old patient who sustained a closed femur fracture 48 hours …](https://mymerci.kr/pages/nclex_q.php?qn_id=541008) - [A 45-year-old construction worker sustained a closed fracture of the right tibia and fibul…](https://mymerci.kr/pages/nclex_q.php?qn_id=541009) - [A 28-year-old athlete sustained a closed femoral shaft fracture and is experiencing severe…](https://mymerci.kr/pages/nclex_q.php?qn_id=541010) - [A nurse is caring for a client who sustained a closed femur fracture 48 hours ago. 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