Electronic Von Frey
The electronic model of Von Frey filament combines ease of use and rapidity for the determination of the mechanical sensitivity threshold in rodent.
- New easier and more comfortable Handle
- Provides objective and accurate data
- The threshold value can be obtained in only one test, and in a highly reproducible manner
- Elimination of the problems of filament standardization
- Stimulation of areas of equal size
- The end-point value is automatically recorded
- Real time force curves in BIOCIS software
The Von Frey filament is applied against the central edge of the animal hind paw. Paw withdrawal caused by the stimulation is registered as a response. The corresponding force applied is recorded by the system and displayed on the large backlighted screen of the Von Frey unit with a resolution of 0.1 grams. A different tip is used for rat (hard plastic tip) and mice (elastic spring tip). A foot-switch is proved to carry out rapid hands-free experiments.
Differently to the procedure using classical Von-Frey filaments, the threshold value can be obtained in only one test, and in a highly reproducible manner. The electronic instrument does not present any temperature or hygrometry drift, which used to be an issue with the manual version of the filaments.
The new Electronic Von Frey EVF4 is provided with a easier and more comfortable handle. The BIO-CIS software can be used to automatically record the results on a PC through a RS 232 port (direct Excel exportation).
|Measurement range||0 to 500 g (5N), 120% overload allowed without causing any damage to the sensor||0 to 500 g (5N), 120% overload allowed without causing any damage to the sensor|
|Precision||Resolution: 0.1 g; Accuracy: 0.2 g||Resolution: 0.1 g; Accuracy: 0.2 g|
|Temperature compensation||from 0 to 50°C||from 0 to 50°C|
|Statistical functions||Average value and standard deviation are computed for each subject||Average value and standard deviation are computed for each subject|
|Internal Memory||up to 100 values||up to 100 values|
|Power supply||220-240 V (other voltages on request)||220-240 V (other voltages on request)|