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產品資訊

手持式電子觸覺測量儀 - e-VF Electronic Von Frey

產品型號: 38450
廠牌名稱: Ugo basile
手持式電子觸覺測量儀如同傳統的觸覺量測 (Von Frey) ,皆為用來量測動物對於觸覺或是刺痛感是否有較為敏感的現象,新款的電子式測量儀透過電子探針與操作者的力道來得知動物的觸覺狀態,操作者可以透過設備的液晶螢幕立即得知動物對戳刺的最大忍受度為何,無需更換不同的探針來推論動物的忍受度。

產品特點

  • 精準度可達0.1公克,最大受力可達1000公克
  • 機身輕巧,可隨身攜帶
  • 可使用電池供電,在無電源的環境下進行操作
  • 數據可透過USB傳輸至電腦進行分析與繪圖

 

手持式電子觸覺測量儀如同傳統的觸覺量測 (Von Frey) ,皆為用來量測動物對於觸覺或是刺痛感是否有較為敏感的現象,新款的電子式測量儀透過電子探針與操作者的力道來得知動物的觸覺狀態,操作者可以透過設備的液晶螢幕立即得知動物對戳刺的最大忍受度為何,無需更換不同的探針來推論動物的忍受度。

 

 

The UB Electronic Von Frey of original design, for automatic assessment of Hypersensitivity and Allodynia in rats and mice, automatically records the animal response to user-controlled application of force rate.

A touch stimulator transducer is mounted on a Perspex handle, so that routine procedures may be employed to examine and test the animal skin sensitivity. A prism of original design is of great help to localize the aimed stimulation area

The completion of each test may be indicated either by the sudden release of the paw or by pressing the external foot-pedal. The display then gives the operator a summary of the results of the test (i.e. force and time corresponding to the animal response).

The rate of application of the force is set by the operator and the e-VF includes software tools that help the operator in consistently applying the force at the desired rate.

The device includes as standard both a control unit with internal memory and the NEW DCA software for signal monitoring, data transfer and analysis. The results of several hundred tests may be stored in the e-VF, be browsed on the control unit and/or trasferred to a PC in proprietary, Excel (.xls) or text (.txt) format, to be managed by most statistical analysis packages available on the market.

The instrument includes:

  • an electronic unit
  • a touch stimulator with a viewing prism of original design
  • the software

The 37450-278 Base assembly for plantar stimulation, or with the self-supporting perforated platforms 37450-045 / 37450-085 (see picture), can be purchased separately to complete the set-up, when the stimulation target is the rodent plantar surface. 

產品規格

Operation  
Commands                   via soft-buttons
Read-out multifunction graphic display
Starting via keys on the Controller front panel
Force Range up to 1000 grams (maximum force can be preset)
Force increasing rate monitored via the Ratemeter on the electronic unit, or via the slope function on the PC
Latency Time read-out on the graphic display, in 0.1 s steps
Connection to PC via USB cable (A to mini-B)
Power Requirement either battery operated, or via USB cable connected to PC or universal converter  (85-264 VAC, 50-60Hz)
Operating Temperature 10° to 40° C
Sound Level negligible
Pollution Degree ≤ 2
Physical  
Total Weight 0.8 Kg
Shipping Weight 2.7 Kg approx.
Packing Dimensions 46 x 38 x 27  cm

應用領域

Impaired cutaneous sensation is usually first manife­sted in a loss of light touch detection. The Electronic Von Frey was developed to quantify light touch in the laboratory animal.

The classic instrument for test of touch sensitivity is the Von Frey hair or, more specifically, the Semmes- Weinstein set of Von Frey Hairs, i.e., 20 monofilaments in a linear scale of physical force.

The hair is pressed against the skin, the force applied increases with incre­asing hand pressure, until the hair bends; once the hair is bent, increasing hand approach causes further bend, but negligible additional force on the skin. In this way, a given filament always applies the same force, not subject to variation by the energy of the operator.

The Semmes-Weinstein set can be used on rodents (which respond to light touch of the paw, if they feel it, by a paw withdrawal reflex). However, the involved proce­dure is tedious and time-consuming because several stimulations must be performed for a single test (i.e. a different filament for each force level).

Compared to the classic Von Frey Hairs, the Electronic Von Frey device (e-VF) has the advantage of ensuring a continuous force application along the whole force capacity of the sensor (i.e. 1-1000 gf), by using a rigid metal tip, and the capability to record the animal response automatically.

Moreover, the metal tip used in the e-VF is the same as the one used in the classic Ugo Basile Dy­namic Plantar Aesthesiometer (PN 37450), allowing consistent comparison of results among the two instru­ments.

 

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