Designed for the Randall-Selitto test, which requires the application of increasing pressure on the paw between a flat surface and a blunt pointer
Usually used with animals with one paw inflamed by an injection and one normal paw to evaluate drugs for analgesic action.Principle of OperationThe device exerts a steadily increasing force (16 grams per second) on the rat paw until the animal makes a stereotyped flinch response
The researcher releases a foot pedal to stop the force indicator
The electronics measures the time interval between the start of the slide motion and the moment the slide is stopped by the operator and converts time into force.The force is measured on the scale calibrated in 10-gram steps, by a pointer riveted to the slide
The scale can be multiplied by 2 or 3, by placing one or two disc weights on the slide.