A physician-validated, board-style question from the Active Transport QBank. Try it, then check the reasoning for every option.
A 57-year-old man was brought into the emergency department unconscious 2 days ago. His friends who were with him at that time say he collapsed on the street. Upon arrival to the ED, he had a generalized tonic seizure. At that time, he was intubated and is being treated with diazepam and phenytoin. A noncontrast head CT revealed hemorrhages within the pons and cerebellum with a mass effect and tonsillar herniation. Today, his blood pressure is 110/65 mm Hg, heart rate is 65/min, respiratory rate is 12/min (intubated, ventilator settings: tidal volume (TV) 600 ml, positive end-expiratory pressure (PEEP) 5 cm H2O, and FiO2 40%), and temperature is 37.0°C (98.6°F). On physical examination, the patient is in a comatose state. Pupils are 4 mm bilaterally and unresponsive to light. Cornea reflexes are absent. Gag reflex and cough reflex are also absent. Which of the following is the next best step in the management of this patient?
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A
Withdraw ventilation support and mark time of deathIncorrect. Withdrawing ventilation before formal brain death declaration — required by law for organ donation and death pronouncement — is premature and inappropriate.
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B
ElectroencephalogramIncorrect. EEG is an ancillary test reserved for when the bedside exam can't be completed (e.g., facial trauma); it is not the first next step after a single positive exam.
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C
Repeat examination in several hoursCorrect. Brain death requires confirmation through a repeat examination after an appropriate interval to exclude reversible confounders like sedating medications.
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D
Second opinion from a neurologistIncorrect. A neurology second opinion isn't formally required by brain death protocols — the proper sequence is repeat examination by a qualified physician after a waiting period.
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E
Apnea testingIncorrect. Apnea testing is a required component of the brain death examination but is performed during the formal exam, not before completing a repeat neurologic examination after an interval to rule out reversible confounders.
↑ Tap an answer to reveal the reasoning
Answer: C. Brain death determination requires absence of cerebral and brainstem function in the setting of a known irreversible cause, with confounders excluded. This patient has the right etiology (massive brainstem hemorrhage with herniation) and findings consistent with brain death (coma, fixed mid-position pupils, absent corneal/gag/cough reflexes). However, he was recently treated with phenytoin and diazepam — both CNS depressants that can mimic brainstem dysfunction — and he is only 2 days post-event. Before declaring brain death, the examination must be repeated after a sufficient interval (typically 6-24 hours in adults) to confirm irreversibility and after sedating medication levels have cleared.
Guidelines mandate either two examinations separated by an appropriate interval or one examination plus a confirmatory ancillary test (EEG, cerebral blood flow study) when bedside criteria can't be assessed. The next step is to repeat the bedside examination once confounders are excluded; ancillary tests (EEG) are used only when needed. Withdrawing support before formal brain death determination would be premature.
**Why each option:**
**A.** Withdrawing ventilation before formal brain death declaration — required by law for organ donation and death pronouncement — is premature and inappropriate.
**B.** EEG is an ancillary test reserved for when the bedside exam can't be completed (e.g., facial trauma); it is not the first next step after a single positive exam.
**C.** Correct. Brain death requires confirmation through a repeat examination after an appropriate interval to exclude reversible confounders like sedating medications.
**D.** A neurology second opinion isn't formally required by brain death protocols — the proper sequence is repeat examination by a qualified physician after a waiting period.