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Role of bronchoalveolar lavage in the diagnosis of fat embolism syndrome

N Roger, A Xaubet, C Agusti, E Zabala, E Ballester, A Torres, C Picado, R Rodriguez-Roisin
European Respiratory Journal 1995 8: 1275-1280; DOI: 10.1183/09031936.95.08081275
N Roger
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A Xaubet
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C Agusti
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E Zabala
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E Ballester
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A Torres
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C Picado
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R Rodriguez-Roisin
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Abstract

Fat embolism syndrome (FES) is a serious clinical disorder occurring in trauma patients. The diagnosis of fat embolism syndrome may be difficult to establish clinically. We therefore wanted to investigate the usefulness of bronchoalveolar lavage (BAL) in the diagnostic evaluation of fat embolism syndrome. We analysed the presence of fat droplets in BAL cells in 32 trauma patients (7 with full diagnostic criteria of fat embolism syndrome, 17 with incomplete diagnostic criteria, and 8 with no diagnostic criteria at the time of bronchoscopy), 9 nontrauma patients with acute respiratory failure and radiographic pulmonary infiltrates, and a control group composed of 10 individuals. An increased percentage of oil red O positive alveolar macrophages (cut-off point > 3%) in BAL was found in 6 out of 7 patients with definite clinical criteria of fat embolism syndrome, and in 6 out of 20 trauma patients without the clinical diagnosis of fat embolism syndrome. In two patients with fat embolism syndrome, sequential BAL showed that the percentage of positive macrophages decreased when the clinical manifestations disappeared. An increased number of BAL macrophages with fat droplets was also observed in two trauma patients without evidence of fat embolism syndrome after long-bone surgical intervention. By contrast, all non-trauma patients had a percentage of positive cells lower than 3%. Our findings suggest that BAL oil red O positive macrophages are frequently observed in trauma patients irrespective of the presence of fat embolism syndrome. Conceivably, a high number of oil red O positive macrophages could reflect clinically silent fat embolization.

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Role of bronchoalveolar lavage in the diagnosis of fat embolism syndrome
N Roger, A Xaubet, C Agusti, E Zabala, E Ballester, A Torres, C Picado, R Rodriguez-Roisin
European Respiratory Journal Aug 1995, 8 (8) 1275-1280; DOI: 10.1183/09031936.95.08081275

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Role of bronchoalveolar lavage in the diagnosis of fat embolism syndrome
N Roger, A Xaubet, C Agusti, E Zabala, E Ballester, A Torres, C Picado, R Rodriguez-Roisin
European Respiratory Journal Aug 1995, 8 (8) 1275-1280; DOI: 10.1183/09031936.95.08081275
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