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Computed tomographic findings after acute carbon monoxide poisoning
J S Jones1, J Lagasse, G Zimmerman
1Emergency Medicine Residency Program, Butterworth Hospital, Grand Rapids, MI.
The American Journal of Emergency Medicine
|July 1, 1994
Summary
Computed tomography (CT) can reveal brain damage in carbon monoxide (CO) poisoning patients. Abnormal CT findings, particularly in the basal ganglia, correlate with poorer neurological outcomes after CO exposure.
Area of Science:
- Neurology
- Radiology
- Toxicology
Background:
- Severe carbon monoxide (CO) poisoning is known to cause selective necrosis and degeneration of the globus pallidus.
- These pathological changes are typically observed during autopsy in affected patients.
Purpose of the Study:
- To demonstrate that computed tomography (CT) can visualize in vivo morphological brain changes associated with carbon monoxide poisoning.
- To establish CT findings as a potential indicator of prognosis in patients with acute CO poisoning.
Main Methods:
- Retrospective review of medical records for 19 consecutive patients hospitalized with acute CO poisoning.
- Analysis of CT examinations performed during hospitalization to identify morphological brain changes.
Main Results:
- Abnormal CT findings were present in 10 out of 19 patients (53%).
- Low-density areas in the basal ganglia were the most frequent abnormality, observed in 7 cases, with lesions ranging from globus pallidus involvement to extension into the internal capsule.
- Patients with abnormal CT scans (n=10) had a higher likelihood of neurological impairment upon discharge (90%), while most patients with normal CT scans (89%) recovered neurologically intact.
Conclusions:
- Computed tomography can detect characteristic basal ganglia lesions in patients with acute carbon monoxide poisoning.
- CT findings, particularly basal ganglia abnormalities, have significant prognostic implications for neurological recovery after CO poisoning.