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Delayed neurologic sequelae in carbon monoxide intoxication.

I S Choi

    Archives of Neurology
    |July 1, 1983
    PubMed
    Summary
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    Delayed neurologic sequelae affect 2.75% of acute carbon monoxide intoxication victims. Most patients recover within a year, with age and anoxia severity being key factors.

    Area of Science:

    • Neurology
    • Toxicology
    • Public Health

    Background:

    • Carbon monoxide (CO) poisoning is a significant public health concern.
    • Delayed neurologic sequelae (DNS) can occur after acute CO intoxication.
    • Understanding the incidence, characteristics, and prognosis of DNS is crucial for patient management.

    Purpose of the Study:

    • To determine the incidence of delayed neurologic sequelae (DNS) in patients with acute carbon monoxide intoxication.
    • To describe the clinical features, demographic characteristics, and potential contributing factors of DNS.
    • To evaluate the recovery rate and timeline for patients experiencing DNS.

    Main Methods:

    • Retrospective analysis of 2,360 patients treated for acute carbon monoxide intoxication between 1976 and 1981.

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  • Diagnosis of DNS based on clinical examination and documented neurologic symptoms.
  • Follow-up assessment of a subset of patients to determine recovery patterns.

    • Main Results:

    • Delayed neurologic sequelae were diagnosed in 65 patients (2.75% of the total cohort, 11.8% of admitted patients).
    • The mean age of affected individuals was 56.1 years, with peak incidence in the sixth and seventh decades.
    • Common symptoms included mental deterioration and incontinence; common signs included masked face and increased muscle tone. Age and anoxia severity were key factors, not prior disease.
    • Of 36 patients followed for two years, 75% recovered within one year.

    Conclusions:

    • Delayed neurologic sequelae represent a notable complication of acute carbon monoxide intoxication.
    • While DNS can be severe, a significant majority of affected individuals experience recovery within a year.
    • Age and the severity of the initial anoxic insult are primary risk factors for developing DNS.