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Memory distortion during acute and chronic pain recalling
D Matera1, M Morelli, M La Grua
1United Section of Anesthesia-Algology, Tuscan Orthopedic Institute, General Hospital, USL 10, Florence, Italy.
Minerva Anestesiologica
|December 16, 2003
Summary
Patients often misremember their initial pain levels, impacting pain relief assessments. This memory distortion is linked to how much pain changes during treatment, not the current pain level.
Area of Science:
- Pain Medicine
- Psychology of Pain
Background:
- Accurate pain assessment is crucial for effective treatment.
- Patient recall of pain intensity can be subjective and prone to distortion.
Purpose of the Study:
- To investigate the phenomenon of pain memory distortion.
- To evaluate the reliability of quantitative pain scales in reflecting initial pain experiences.
Main Methods:
- Retrospective analysis of 2333 patients treated at a Pain Therapy Centre (1994-2000).
- Evaluation of Visual Analog Scale (VAS) and Numerical Rating Scale (NRS) scores at treatment initiation and conclusion.
- Assessment of pain relief through correlation of initial and final pain scores.
Main Results:
- Patients demonstrated inaccurate recall of their initial pain intensity when using both VAS and NRS.
- The degree of pain memory distortion was not directly correlated with the final pain score.
Conclusions:
- Pain memory distortion is influenced by the variation in pain intensity during treatment, not the current pain level.
- Memory distortion is inversely related to the initial pain intensity.
- Evaluating pain relief solely based on end-of-treatment scores can lead to under- or overestimation of actual pain reduction.