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Related Experiment Videos

Carbon monoxide, amnesia and hyperbaric oxygen therapy.

A H Samuels1, M J Vamos, M R Taikato

  • 1Auckland Hospital, New Zealand.

The Australian and New Zealand Journal of Psychiatry
|June 1, 1992
PubMed
Summary

Carbon monoxide poisoning can cause memory loss and was initially misdiagnosed in one case. Prompt hyperbaric oxygen therapy reversed cognitive deficits, highlighting its importance in treating this poisoning.

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Area of Science:

  • Neuroscience
  • Toxicology
  • Emergency Medicine

Background:

  • Carbon monoxide (CO) poisoning is a potentially fatal condition often presenting with non-specific symptoms.
  • Delayed diagnosis of CO poisoning can lead to persistent neurological sequelae.
  • Conversion disorder is a psychiatric diagnosis that can sometimes mimic organic neurological conditions.

Observation:

  • A patient presented with cognitive deficits, including profound memory disturbance, initially diagnosed as conversion disorder.
  • The patient had a history suggestive of carbon monoxide exposure.
  • Despite a one-week delay in diagnosis and initiation of treatment, significant cognitive improvements were observed.

Findings:

  • Hyperbaric oxygen therapy (HBOT) was effective in reversing the cognitive deficits associated with carbon monoxide poisoning.
  • The timing of HBOT initiation did not preclude a positive therapeutic outcome in this case.
  • Clinical manifestations of CO poisoning can be subtle and easily misattributed to other conditions.

Implications:

  • A high index of suspicion for carbon monoxide poisoning is crucial in patients presenting with unexplained profound memory disturbances.
  • Early recognition and treatment with hyperbaric oxygen therapy can lead to favorable neurological recovery.
  • This case underscores the importance of considering toxicological etiologies in psychiatric presentations.

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