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Von Frey 触觉测量仪

时间:2015-12-23 来源:本站 作者:Author
Von Frey 触觉测量仪

Von Frey 触觉测量仪

 

Von Frey机械痛阈、触觉阈测量套装Von Frey Hairs test(Von Frey filaments纤毛机械刺激针)适用于对小鼠、大鼠进行触觉反应测量。 
 

纤毛机械刺激针(Von Frey Hairs test)是主要由为数20的Von Frey Hairs 纤毛机械刺激针组成,触觉测量纤维丝的力度为0.008克-300克,是一种经典且无损伤的评估皮肤触觉灵敏度机械痛阈、触觉阈测量的工具。该Von Frey Hairs 纤毛机械刺激针同时可配套使用凿孔金属工作台(34 x 14 英寸),该工作台上布置了一张进行Von Frey Hairs 纤毛机械刺激针的网筛,触觉测量网筛上的筛孔是由激光切割而成,孔的尺寸为5X5毫米,孔与孔间的间距大约是1毫米,这对于受试触觉测量的动物来说一个舒服的环境,且有利于实验人员观察受试触觉测试动物的爪。此外,网筛上涂有特殊的涂料,非常方便实验人员清理实验过程中产生的污垢。 
 

Von Frey Hairs 纤毛机械刺激针主要用于评估皮肤的触觉反应测试,是非常受欢迎的非侵入式实验器材。Von Frey Hairs 纤毛机械刺激针可提供0.008g-300g的触觉测试刺激力。Von Frey Hairs 纤毛机械刺激针的粗细及伸出长度决定提供触觉测试刺激力的大小。实验时,根据实际情况选定粗细当得的Von Frey Hairs 纤毛机械刺激针,调节适当Von Frey Hairs 纤毛机械刺激针的伸出长度,垂直地刺激触觉测试皮肤,可通过调节触觉测量纤维丝的伸长、更换Von Frey Hairs 纤毛机械刺激针调整刺激力大小,直到Von Frey Hairs 纤毛机械刺激针弯曲。当啮齿类动物得爪受到一个机械触觉反应刺激,它们会缩回反射。该触觉测试可应用于大、小鼠的足底触觉反应状况。

 

另外,可选触觉测量专配凿的孔工作台,其网筛孔是利用激光切冲而成的方形孔,尺寸为5×5mm2 ,触觉测量孔间距约为1mm,这对受试动物而言是一个舒适的环境,也便于操作人员观察动物的足底区域。该触觉测量凿孔台经涂层处理,便于清洁且不易被腐蚀。

 

Touch Test
 
The Semmes-Weinstein monofilaments provide an approximate logarithmic scale of actual force, and a linear scale of perceived intensity. They have a long history of effective use in clinical settings, and can be used to diagnose pathologies of hyper- or hypo-aesthesia. Subsets within the set of 20 probes distinguish pathologies on different parts of the body (foot, hand, lip, cheek,etc.).
 
Semmes-Weinstein Von Frey Aesthesiometer for touch assessment 
 
 
Features
 
  Set of 20 monofilaments based on the Semmes-Weinstein monofilament set
  Features retractable filaments to protect the filament
  Allows the researcher to carry a few in a pocket
 
The Semmes-Weinstein monofilaments provide an approximate logarithmic scale of actual force, and a linear scale of perceived intensity. They have a long history of effective use in clinical settings, and can be used to diagnose pathologies of hyper- or hypo-aesthesia. Subsets within the set of 20 probes distinguish pathologies on different parts of the body (foot, hand, lip, cheek,etc.).
 
Operating Principle When the tip of a fiber of given length and diameter is pressed against the skin at right angles, the force of application increases as long as the researcher continues to advance the probe, until the fiber bends. After the fiber bends, continued advance creates more bend, but not more force of application. This makes it possible for the researcher using a hand-held probe to apply a reproducible force, within a wide tolerance, to the skin surface.
 
Pre-Clinical Use Rodents exhibit a paw withdrawal reflex when the paw is unexpectedly touched. The Touch Test? Sensory Evaluator can be used on the Plantar surfaces of the foot of a rat or mouse. The animal indicates sensation by pulling back its paw. Individual filaments available.

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