Von Frey 纖維絲（以德國生理學(xué)家 Max von Frey 的名字命名1852-1932年）最初是由不同直徑的動物和人類毛發(fā)制成的現(xiàn)在是由尼龍單絲制作 不同的型號具備不同的抗彎能力。纖維絲垂直接觸皮膚逐漸增加力直到它彎曲由此確定施加力的大小。


· 基于 Semmes Weinstein 單絲套裝配備了可以旋轉(zhuǎn)裝置保護外殼可折疊收納；
· 提供實際力度的標(biāo)度和感知強度的線性標(biāo)度；
· 在臨床環(huán)境中的成功使用有著很久的歷史可用于診斷感覺過敏或感覺減退； 
· 根據(jù)不同的應(yīng)用和測試部位可選擇不同的套裝腳、手、唇、臉頰等；

主要特點 
· 20 根纖維絲套件；
· 分級系列尼龍單絲帶不同的顏色編碼；
· 旋轉(zhuǎn)保護外殼有利于收納和攜帶；


工作原理

當(dāng)特定長度和直徑的纖維絲以垂直角度壓在皮膚上時研究人員繼續(xù)施加壓力直到纖維絲彎曲。纖維絲彎曲后繼續(xù)前進會產(chǎn)生更多的彎曲但不會產(chǎn)生更多的壓力。 

這一原理使研究人員可以在一個寬泛的公差范圍內(nèi)使用纖維絲對皮膚施加一個可重現(xiàn)的力。 

20種不同規(guī)格

可選擇測試支架和測試鼠籠

 
為了方便用Von Frey 纖維絲刺激足底表面我們提供了一個90x38cm的穿孔金屬平臺。激光穿孔形成 5X5mm 尺寸的方孔網(wǎng)格；金屬格柵約 1mm寬對動物舒適也有利于實驗人員查看老鼠爪子的動作情況。 

擱板涂有聚合物樹脂易于清潔。 

配合動物圍欄（測試鼠籠）使用可將3只大鼠或12小鼠同時約束在測試平臺上進行測試實驗。

測試平臺

測試平臺

十字測試網(wǎng)格

標(biāo)準(zhǔn)型測試支架與電子式測痛儀

電子式觸覺疼痛測量儀

· 電子觸覺測試儀可用來替代傳統(tǒng)的Semmes-Weinstein（Von Frey Hairs）纖毛機械刺激針；

· 可直接測得動物的機械痛閾和觸覺閾測量不需要進行反復(fù)的測試和繁雜的計算。設(shè)備輕巧易用測量精確；

型號38450

參考文獻

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