Rat Von Frey filament Aesthesio®

for rodentsfor mice

Touch pressure threshold testing involves the use of nylon monofilaments of different lengths and increasing diameters. These monofilaments provide controlled gradients of force to the mechanoreceptors in the skin and can thus be used to determine pressure detection thresholds. The advantage of monofilament testing is that it provides quantified and repeatable information about a patient’s detection of touch. The pattern of sensibility loss reflected by the monofilament testing helps to identify pathology. Product Details: Aesthesio® Precision Tactile Sensory Evaluators (Semmes-Weinstein Monofilaments) provide a noninvasive evaluation of cutaneous sensation levels throughout the body with results that are objective and repeatable. Using Aesthesio® Precision Tactile Sensory Evaluators is indicated in diagnoses including nerve compression syndromes, peripheral neuropathy, thermal injuries and postoperative nerve repair. The Aesthesio® Precision Tactile Sensory Evaluator consists of a standardized set of nylon filaments, all of varying length and diameter. The force at which a monofilament bends is proportional to its diameter, and inversely proportional to its length. Aesthesio® Precision Tactile Sensory Evaluators are selected and labeled so as to give a linear scale of perceived intensity (a logarithmic scale is applied.) Instructions for Threshold Testing in Humans Sensibility testing should be conducted in a quiet environment, where the patient is comfortable and relaxed. Common test points are outlined in the illustrations below. For detailed and comprehensive test protocols, please reference the following sources: Bell-Krotoski JA: “Sensibility Testing: History, Instrumentation and Clinical Procedures”, Rehabilitation of the Hand and Upper Extremity, Volume 1, Elsevier Mosby 2011, Chapter 11, Pages 132-145. www.hrsa.gov/hansensdisease/leap/ Use of Aesthesio® Precision Tactile Sensory Evaluator Kit with Animals The standard procedure for the Aesthesio® Precision Tactile Sensory Evaluator when used with humans is to ask the subject to report if they have been touched. Since animals cannot verbalize whether they have been lightly touched, reflex reactions can be used in place of a verbal report of sensation. The “Paw Withdrawal Reflex” is a useful one. When a filament of detectable presence is applied, the paw will immediately withdraw, and inflammation will increase the withdrawal reflex. Proper Storage and Handling: Aesthesio® Precision Tactile Sensory Evaluators are precision instruments. Care should be taken at all times to protect the integrity of the nylon filament. The filament may be cleaned with a mild instrument disinfectant (e.g. Isopropyl Alcohol or similar. Avoid chlorine-based disinfectants.) Make sure the monofilaments are thoroughly dry before reusing. Substantially bent or kinked monofilaments must not be used for testing and should be discarded and replaced. DanMic Global, LLC item numbers can be found in the chart to the right (3rd column), and refers to the individual evaluators. Store the evaluators at room temperature and humidity. Do not store in or expose to direct sunlight. - Noninvasive evaluation of cutaneous sensation - Standardized set of nylon filaments - Objective and repeatable results - Indicated for nerve compression syndromes, peripheral neuropathy, thermal injuries, postoperative nerve repair - Linear/logarithmic scale of perceived intensity - Includes instructions for human and animal testing - Proper storage and cleaning required - 20 piece kit