North Coast_Stoelting_Von Frey纤维丝低价
美国 North Coast
美国 Stoelting
Von Frey (with grids)测痛/炎症/机械痛
Von Frey Hairs 触觉测量套件
Touch test sensory probe/evaluators
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触觉测量套件是由20根尼龙纤维丝组成，英文中称为 Von Frey filaments 或Semmes-Weinstein monofilaments，主要用于评估皮肤的触觉，是非常受欢迎的非侵入式实验器材。它可提供0.008g-300g的刺激力。尼龙丝的粗细及伸出长度决定提供刺激力的大小。实验时，根据实际情况选定一种尼龙丝，调节适当的伸出长度，垂直地刺激皮肤，通过调节伸长、更换尼龙丝可调整刺激力的大小。尼龙丝弯曲以后，持续的推进会导致更多的弯曲，但是刺激力不会再增加。当啮齿类动物得爪受到足够的机械刺激后会有缩回反射，反复调整刺激力的大小，最终选定适当的刺激力。Von Frey 触觉测试不仅可应用于大、小鼠的足底，在临床上也广泛使用，可用于触觉测试及高知觉和低知觉诊断。
另外，可选配凿孔工作台，其网筛孔是利用激光切冲而成的方形孔，尺寸为5×5mm2 ，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。该凿孔台经涂层处理，便于清洁且不易被腐蚀。
| Color | Evaluator Size | Catalogue item Number | Target Force (grams) | Target Force* (milliNewtons) |
Theoretical Pressure Grams/Sq. mm |
Hand & Dorsal Foot Thresholds | Plantar Threshold |
| Green | 1.65 | 514001 | 0.008 | 0.08 | 2.53 | normal | normal |
| 2.36 | 514002 | 0.02 | 0.20 | 4.39 | normal | normal | |
| 2.44 | 514003 | 0.04 | 0.40 | 4.93 | normal | normal | |
| 2.83 | 514004 | 0.07 | 0.70 | 5.53 | normal | normal | |
| Blue | 3.22 | 514005 | 0.16 | 1.6 | 8.77 | Diminished Light Touch | normal |
| 3.61 | 514006 | 0.40 | 3.9 | 16.1 | Diminished Light Touch | Diminished Light Touch | |
| Purple | 3.84 | 514007 | 0.60 | 5.9 | 18.4 | Diminished Light Touch | Diminished Light Touch |
| 4.08 | 514008 | 1.0 | 9.8 | 24.4 | Diminished Light Touch | Diminished Light Touch | |
| 4.17 | 514009 | 1.4 | 13.7 | 27.9 | Diminished Light Touch | Diminished Light Touch | |
| 4.31 | 514010 | 2.0 | 19.6 | 27.4 | Diminished Light Touch | Diminished Light Touch | |
| Red | 4.56 | 514011 | 4.0 | 39.2 | 40.3 | Loss of Protec-tive Sensation | Diminished Light Touch |
| 4.74 | 514012 | 6.0 | 58.8 | 52.6 | Loss of Protec-tive Sensation | Diminished Light Touch | |
| 4.93 | 514013 | 8.0 | 78.4 | 61.7 | Loss of Protec-tive Sensation | Diminished Light Touch | |
| 5.07 | 514014 | 10 | 98.0 | 68.3 | Loss of Protec-tive Sensation | Loss of Protective Sensation | |
| 5.18 | 514015 | 15 | 147 | 82.0 | Loss of Protec-tive Sensation | Loss of Protective Sensation | |
| 5.46 | 514016 | 26 | 255 | 106 | Loss of Protec-tive Sensation | Loss of Protective Sensation | |
| 5.88 | 514017 | 60 | 588 | 141 | Loss of Protec-tive Sensation | Loss of Protective Sensation | |
| 6.10 | 514018 | 100 | 980 | 193 | Loss of Protec-tive Sensation | Loss of Protective Sensation | |
| 6.45 | 514019 | 180 | 1760 | 222 | Loss of Protec-tive Sensation | Loss of Protective Sensation | |
| Orange | 6.65 | 514020 | 300 | 2940 | 292 | Deep Protective Sensation | Deep Pressure Sensation |
*calculated rounded numbers (conversion factor 9.80665)
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