53540 | Luneau 角膜知觉计Aesthesiometer Cochet-Bonnet

Description

The fully retractable Aesthesiometer with a 12/100 mm nylon thread for measuring the tactile sensitivity of the Cornea and eyelid margin. Can be used pre-operative or for post-operative recovery. Also known as a Cochet and Bonnet Aesthesiometer or Esthesiometer.

Provides direct reading on the instrument of the length of the very precisely calibrated filament, based upon the principle of pressure transmitted axially by a nylon monofilament, of known diameter but of variable length, for a given bending stress. The length of the thread like mono-filament, controlled by the forefinger (shown above), ranges from 60mm to 5mm. As the length is decreased the pressure transmitted is increased from 11mm/grms to 200mm/grms. Includes conversion table, which translates filament length in millimeters to a measure of mercury pressure (mm HG).

动物实验仪器

角膜知觉计用于测量角膜知觉的敏感性，该仪器呈笔型，前端有一根直径0.12mm长60mm的可伸缩尼龙纤维，从伸出60mm开始测试纤维末端垂直接触角膜中央后施加压力，使纤维轻度弯曲进行3次测定有2次报告有感觉为阳性结果，每5mm为一档记录下阳性结果的最长纤维长度作为角膜知觉程度。

角膜知觉计使用方法：测量前，将待测动物置于安静室内环境，保持受检动物清醒，精神状态良好。测量从60 mm开始，测量时将角膜知觉计的尼龙丝垂直于动物角膜中央表面，轻施压力，每次递减5 mm，直至出现被检测眼眨眼及躲避行为作为角膜知觉阳性反应，同一长度测量3次，每次测量间隔30 min，如果3次检测中出现2次阳性反应视为阳性结果，引起该阳性结果的尼龙纤维长度即为角膜知觉敏感度。