mechanical threshold testing

…Frey fila- the dB/time waveform), the frequency (Hz) of call with ments for mechanical nociceptive testing. This method the highest intensity (dB [A]), rate of high frequency is designed to indicate…

…Frey fila- the dB/time waveform), the frequency (Hz) of call with ments for mechanical nociceptive testing. This method the highest intensity (dB [A]), rate of high frequency is designed to indicate…

eness,” such as eye widening sensory testing of the wound and surrounding skin was or blinking or nasal flaring, local skin twitch, subcutane- used to assess sensitivity over the initial expected action ous muscle twitch, or anal contraction; 2 = partial head period of the TA (4 to 6 h) and at 24 h to assess extended or rump withdrawal reflex, such as slight lifting of the efficacy of the actives beyond the product description. snout or partial head rotation, multiple subcutaneous This was measured by means of a pressure transducer muscle group contraction, and lifting of the tail; 3 = full (electronic von Frey anesthesiometer with rigid tips; 0 startle reflex of the head, resulting in a major movement, to 1,000 g; IITC-Life Science Instruments, Woodland such as lifting head off the cradle, full head jerk or full Hills, CA) and through the use of a von Frey monofila- head rotation, or full rump withdrawal reflex with lifting ment (300 g, Bailey Instruments Ltd., Manchester, UK). of the rump off the cradle. Total scores were calculated Calves were restrained in the calf cradle, and testing was out of 6 for periwound sensitivity and out of 12 for di- performed before castration and at 3 min and 2, 6, and rect wound sensitivity. 24 h after castration. Electronic von Frey Anesthesiometer. Animals Statistical Analysis were placed in the calf cradle, and the tip of the anes- thesiometer was applied to the wound and surrounding Data were analyzed using Genstat software (VSN (periwound) skin (Fig. 1). Pain threshold was automati- International, hemel Hempstead, UK). Residual maxi- cally recorded as maximum pressure (g) exerted before mum likelihood estimation linear mixed model analy- animal motor response and withdrawal from the device. ses were used to analyze differences

…All procedures were performed with the approval of the University of Queensland’s Production Mechanical threshold testing and Companion Animal Ethics Committee (SVS/300/18/INVETUS). Ten horses (nine geldings A wireless…

…These investigators reported that mechanical (nociceptive) thresholds can be 83 used both for testing the efficacy of anaesthetics and analgesics, and for assessing hyperalgesia in 84 chronic pain states in research and…

…These investigators reported that mechanical (nociceptive) thresholds can be 83 used both for testing the efficacy of anaesthetics and analgesics, and for assessing hyperalgesia in 84 chronic pain states in research and…

…These investigators reported that mechanical (nociceptive) thresholds can be used both for testing the efficacy of anaesthetics and analgesics, and for assessing hyperalgesia in chronic pain states in research and clinical settings…

…1 min, 1, 2, withdrawal reflex away from the mechanical stimulus. Testing 5, and 24 h post-treatment), and their interaction, area tested was performed using a calibrated hand-held pressure algometer…