• Otol. Neurotol. · Apr 2007

    Auditory brainstem response: prognostic value in patients with a score of 3 on the Glasgow Coma Scale.

    • Luiz Carlos A de Sousa, Benedicto O Colli, Marcelo R T Piza, Sady S da Costa, Marcus Ferez, and Marco Lavrador.
    • Paparella Otorhinolaryngology Association, Faculty of Medicine, University of Ribeirão Preto, Brazil. lcarlos@clinicapaparella.com.br
    • Otol. Neurotol. 2007 Apr 1;28(3):426-8.

    ObjectiveTo evaluate the prognostic value of auditory brainstem response (ABR) recorded in comatose patients presenting a score of 3 on the Glasgow Coma Scale (GCS = 3).PatientsOne hundred thirty-eight patients in coma at GCS = 3 due to various etiologic agents.InterventionTo record and analyze tracings of ABR.Main Outcome MeasureTracings from ABR were classified into four types (B1, B2, B3, and B4) on the basis of synchrony of waves.ResultsThe Fischer's exact test used for comparison between death proportions revealed that B1 is different from B2, B3, or B4 and the association B2 + B3 + B4.ConclusionAuditory brainstem response is a useful tool with prognostic value for patients in coma with GCS = 3. It was demonstrated in our series that once the patient presented an abnormal ABR (B2, B3, or B4), he had a greater probability of dying than a patient with a normal ABR (B1).

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