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To explore the effectiveness of different pain rating methods in a formalin pain model in rats.

January 1, 1995Pain

The formalin test: scoring properties of the first and second phases of the pain response in rats

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To explore the effectiveness of different pain rating methods in a formalin pain model in rats.
Established dose-response relations for formalin injection and analgesics.
Utilized behavioural measures including favouring, lifting, licking, and flinching/shaking.
Performed correlational and regression analyses to evaluate pain response.
Pain responses showed a biphasic pattern, but flinching varied across time.
Combining licking and elevating scores yielded strong predictive values (r=0.75 to 0.86) for pain.
Power analysis indicated that combined pain scores were more effective for detecting differences.

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Randomized trial examines pain scoring methods in rats, revealing dynamic responses to formalin and analgesics.

Abbott et al. (1995) studied this question.

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