Von Frey 纖維絲（以德國(guó)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(dòng)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(hào)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(hù)外殼可折疊收納；
· 提供實(shí)際力度的標(biāo)度和感知強(qiáng)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(jué)過(guò)敏或感覺(jué)減退； 
· 根據(jù)不同的應(yīng)用和測(cè)試部位可選擇不同的套裝腳、手、唇、臉頰等；

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


工作原理

當(dāng)特定長(zhǎng)度和直徑的纖維絲以垂直角度壓在皮膚上時(shí)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(jìn)會(huì)產(chǎn)生更多的彎曲但不會(huì)產(chǎn)生更多的壓力。 

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

20種不同規(guī)格

可選擇測(cè)試支架和測(cè)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(gè)90x38cm的穿孔金屬平臺(tái)。激光穿孔形成 5X5mm 尺寸的方孔網(wǎng)格；金屬格柵約 1mm寬對(duì)動(dòng)物舒適也有利于實(shí)驗(yàn)人員查看老鼠爪子的動(dòng)作情況。 

擱板涂有聚合物樹(shù)脂易于清潔。 

配合動(dòng)物圍欄（測(cè)試鼠籠）使用可將3只大鼠或12小鼠同時(shí)約束在測(cè)試平臺(tái)上進(jìn)行測(cè)試實(shí)驗(yàn)。

測(cè)試平臺(tái)

測(cè)試平臺(tái)

十字測(cè)試網(wǎng)格

標(biāo)準(zhǔn)型測(cè)試支架與電子式測(cè)痛儀

電子式觸覺(jué)疼痛測(cè)量?jī)x

· 電子觸覺(jué)測(cè)試儀可用來(lái)替代傳統(tǒng)的Semmes-Weinstein（Von Frey Hairs）纖毛機(jī)械刺激針；

· 可直接測(cè)得動(dòng)物的機(jī)械痛閾和觸覺(jué)閾測(cè)量不需要進(jìn)行反復(fù)的測(cè)試和繁雜的計(jì)算。設(shè)備輕巧易用測(cè)量精確；

型號(hào)38450

參考文獻(xiàn)

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