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  • Title: Auditory brainstem response: prognostic value in patients with a score of 3 on the Glasgow Coma Scale.
    Author: de Sousa LC, Colli BO, Piza MR, da Costa SS, Ferez M, Lavrador M.
    Journal: Otol Neurotol; 2007 Apr; 28(3):426-8. PubMed ID: 17303965.
    Abstract:
    OBJECTIVE: To 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). PATIENTS: One hundred thirty-eight patients in coma at GCS = 3 due to various etiologic agents. INTERVENTION: To record and analyze tracings of ABR. MAIN OUTCOME MEASURE: Tracings from ABR were classified into four types (B1, B2, B3, and B4) on the basis of synchrony of waves. RESULTS: The 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. CONCLUSION: Auditory 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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