Human experimental pain models 2: the cold pressor model.

Area of Science:

• Pain research
• Analgesic drug development
• Human pain models

Background:

• The cold pressor test (CPT) is a widely used pain model.
• It assesses pain onset, intensity, and tolerance through cold water immersion.
• CPT was initially developed for hypertension research but is now used for analgesic studies.

Purpose of the Study:

• To evaluate the reproducibility of the cold pressor test.
• To identify factors contributing to variability in analgesic responses within the CPT model.
• To propose protocol standardization for enhanced CPT reliability.

Main Methods:

• Subjects submerged hands and forearms in ice water.
• Pain onset, intensity, and tolerance were systematically assessed.
• Methodological variations across studies were considered.

Main Results:

• The cold pressor test elicits reproducible pain responses.
• Significant variability in analgesic responses to medications has been observed.
• Methodological discrepancies are suggested as a cause for inconsistent results.

Conclusions:

• The cold pressor test is a valuable tool for pain research and analgesic assessment.
• Standardized protocols are crucial for improving the reproducibility of the cold pressor test.
• Consistent methodology will enhance the reliability of findings in analgesic drug studies.