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Related Experiment Videos

Wada difference a day makes: interpretive cautions regarding same-day injections.

C L Grote1, C Wierenga, M C Smith

  • 1Department of Psychology, Rush-Presbyterian-St. Luke's Medical Center, Chicago, IL 60612, USA.

Neurology
|May 20, 1999
PubMed
Summary
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Memory scores after a second intracarotid amobarbital procedure (IAP) are significantly higher when the second injection is given one day after the first. A one-day interval may negatively impact memory assessment accuracy.

Area of Science:

  • Neurology
  • Neuropsychology

Background:

  • The intracarotid amobarbital procedure (IAP) is used to assess memory lateralization.
  • The timing of repeated IAP injections may influence memory assessment outcomes.

Purpose of the Study:

  • To investigate the impact of the time interval between the first and second intracarotid amobarbital procedure (IAP) injections on subsequent memory scores.

Main Methods:

  • Sixty-two patients received their second IAP injection 24 hours after the first.
  • Forty-three patients received their second IAP injection on the same day as the first.
  • Both groups underwent identical IAP protocols and memory assessments.

Main Results:

  • Memory scores after the second IAP injection were significantly higher in the two-day interval group compared to the one-day interval group (p < 0.05).

Related Experiment Videos

  • The timing of the second injection was a significant factor influencing memory scores.
  • Amobarbital dosage, prior memory scores, and pre-procedure cognitive measures did not significantly correlate with second IAP memory scores.

    • Conclusions:

    • A one-day interval between IAP injections yields different memory scores than a two-day interval.
    • A same-day injection protocol led to misclassification in 19% of patients due to a deleterious effect on memory ratings.
    • Correction scores may be beneficial for patients receiving two IAP injections on the same day to better estimate potential outcomes from a two-day protocol.