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Updated: Aug 24, 2026

A Preterm Rat Model for Pain Studies
Published on: February 9, 2024
Foundations of knowledge about neonatal pain
1Center for Community Child Health Research, BC Research Institute for Children's and Women's Health, Vancouver, British Columbia, Canada.
Insights
This review analyzes neonatal pain research from 1941-2001, identifying knowledge gaps in pain behavior and measurement. Ethological methods are proposed to improve understanding of newborn pain.
Area of Science:
- Neonatal research
- Pain science
- Medical ethics
Background:
- The study reviews the evolution of neonatal pain research from 1941 to 2001.
- It identifies key trends in pain models, measurement techniques, study designs, and sample characteristics within the literature.
- Existing research faces limitations due to a lack of fundamental knowledge regarding pain behavior in newborns.
Purpose of the Study:
- To critically appraise trends in neonatal pain research over a 60-year period.
- To identify conceptual and methodological limitations hindering progress in the field.
- To suggest future research directions for a more comprehensive understanding of newborn pain.
Main Methods:
- A comprehensive literature search was conducted covering publications from 1941 to 2001.
- Citations were analyzed for their pain models, pain measures, study designs, and sample characteristics.
- The review synthesizes findings to identify patterns and gaps in the research landscape.
Main Results:
- Significant gaps exist in basic knowledge of newborn pain behavior.
- Over-reliance on invasive, short-term pain models is prevalent.
- Challenges in pain measurement and understanding confounding factors were identified.
Conclusions:
- Current neonatal pain research is limited by conceptual and methodological issues.
- There is a need for improved understanding of pain behavior and more robust measurement tools.
- Ethological research methods offer a promising avenue for advancing knowledge in neonatal pain assessment.
Abstract:
This review appraises trends in the neonatal pain research literature. We searched the literature produced from 1941 to 2001. Information about the model of pain, measures of pain, design, and sample characteristics is included for each citation. Gaps in knowledge are attributed to specific conceptual and methodological problems, including the lack of basic knowledge about pain behavior, over-reliance on an invasive short-term pain model, pain measurement issues, and lack of knowledge about confounders. Ethological research methods could be used to expand basic knowledge about newborn pain.
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