FAT EMBOLISM SYNDROME AFTER FEMORAL FRACTURE: EARLY RECOGNITION, DIAGNOSTIC CONFIRMATION, AND THERAPEUTIC STRATEGY
Palabras clave:
síndrome de embolia grasa; fractura de fémur; fractura de huesos largos; hipoxemia; embolia grasa cerebral; resonancia magnética; fijación de fracturas; traumaResumen
DOI: https://doi.org/10.46296/yc.v10i19.0965
Resumen
Introducción: El síndrome de embolia grasa (SEG) es una complicación infrecuente pero potencialmente mortal de las fracturas femorales y de otros huesos largos. No existe una prueba diagnóstica patrón oro validada y la tríada clásica de hipoxemia, deterioro neurológico y petequias suele ser incompleta. Métodos: Se realizó una actualización multidominio de la evidencia hasta el 30 de agosto de 2026. La base epidemiológica histórica se apoyó en una revisión sistemática previa de fracturas femorales (1960–2019) y se complementó mediante búsquedas en PubMed/MEDLINE, PubMed Central y rastreo de referencias para identificar cohortes contemporáneas, estudios diagnósticos, ensayos aleatorizados y síntesis de alta relevancia. La heterogeneidad impidió un nuevo metaanálisis. Resultados: La revisión histórica incluyó 15 estudios (n=3.095) y mostró una reducción de la incidencia clínica desde 7,9% en 1960–1979 hasta 1,7% en 2000–2019. Cohortes administrativas contemporáneas informan incidencias codificadas de 0,03–0,04%, mientras que una cohorte de centro de trauma de 2026 informó 4,3%. La fractura femoral, las fracturas múltiples, la edad joven y el trauma de alta energía aumentan el riesgo. La hipoxemia de nueva aparición y el deterioro neurológico durante las primeras 12–72 h constituyen las señales más útiles. La RM cerebral con DWI y SWI aporta el mayor apoyo radiológico en el SEG cerebral. El tratamiento se basa en soporte orgánico y estabilización oportuna de la fractura. Los corticoides profilácticos muestran una señal de beneficio en ensayos antiguos, pero sin evidencia robusta de reducción de mortalidad. Conclusiones: El SEG debe considerarse un diagnóstico clinicorradiológico de exclusión y de reconocimiento urgente. La vigilancia durante las primeras 72 h, la investigación temprana de hipoxemia o deterioro neurológico, el uso selectivo de RM y el soporte crítico moderno constituyen la estrategia más sólida. No existe evidencia suficiente para recomendar anticoagulación específica o corticoides de rutina para el SEG establecido.
Palabras claves: síndrome de embolia grasa; fractura de fémur; fractura de huesos largos; hipoxemia; embolia grasa cerebral; resonancia magnética; fijación de fracturas; trauma.
Abstract
Background: Fat embolism syndrome (FES) is an uncommon but potentially life-threatening complication of femoral and other long-bone fractures. Its diagnosis remains difficult because no validated gold-standard test exists, and the classic triad of hypoxemia, neurologic dysfunction, and petechiae is often incomplete. This updated systematic review summarizes evidence relevant to early recognition, diagnostic confirmation, prevention, and treatment. Methods: A multidomain evidence update was performed through 30 August 2026. The historical epidemiologic evidence base was anchored to a prior systematic review of femoral fractures (1960–2019), and PubMed/MEDLINE, PubMed Central, and backward citation searches were used to identify contemporary cohort, diagnostic, randomized, and high-value synthesis studies. Evidence was synthesized qualitatively because diagnostic definitions, populations, and interventions were heterogeneous. Results: The historical review included 15 studies (n=3,095) and documented a fall in clinically diagnosed FES from 7.9% in 1960–1979 to 1.7% in 2000–2019. Contemporary administrative cohorts report much lower coded incidence (approximately 0.03–0.04%), whereas a 2026 trauma-center cohort reported 4.3%, highlighting persistent case-definition effects. Femoral fracture, multiple long-bone fractures, younger age, and high-energy trauma consistently increase risk. New hypoxemia and neurologic deterioration within 12–72 h are the most useful early signals; petechiae are specific when present but insensitive. Gurd–Wilson and Schonfeld criteria remain supportive rather than confirmatory. Chest CT can demonstrate bilateral ground-glass or centrilobular opacities but is nonspecific; brain MRI with diffusion-weighted imaging and susceptibility-weighted imaging provides the strongest imaging support for cerebral FES. Bronchoalveolar lavage fat-laden macrophages lack adequate specificity. The therapeutic cornerstone is organ support and timely fracture stabilization when physiologically appropriate. Older randomized trials suggest that prophylactic corticosteroids reduce FES and hypoxemia, but the evidence is small, dated, and methodologically limited, with no proven mortality benefit. Conclusions: FES should be treated as a time-sensitive clinicoradiologic diagnosis of exclusion. A structured first-72-hour surveillance strategy, early investigation of unexplained hypoxemia or neurologic change, selective MRI confirmation, and modern supportive critical care offer the most defensible approach. Routine disease-specific anticoagulation or corticosteroid therapy for established FES cannot be recommended from current evidence.
Keywords: fat embolism syndrome; femoral fracture; long-bone fracture; hypoxemia; cerebral fat embolism; magnetic resonance imaging; fracture fixation; trauma.
Información del manuscrito:
Fecha de recepción: 17 de abril de 2026.
Fecha de aceptación: 22 de junio de 2026.
Fecha de publicación: 10 de julio de 2026.
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