![]() ![]() We recorded sensation as abnormal if vibration was perceived on the corresponding joint of the examiner (for example, comparing the metatarsal joint vibration sensation of the patient to the same joint on the examiner), for a count of five seconds after patient reported cessation of sensation, thus increasing the specificity of the finding.įor the analysis, right or left sural nerve conduction data was correlated to the measurements of the two tuning forks at the corresponding metatarsal joint, and right or left median and ulnar nerve conduction data was correlated to the measurements at the corresponding distal interphalangeal joint. 1 These approaches compare proximal sensation to distal, which would overestimate abnormal values. Some have suggested placing the examiner’s finger on the opposite surface of the joint being tested from the tuning fork and noting if the vibration persists after the patient no longer senses it, 2 or assessing the patient’s threshold against the examiner’s, by applying the tuning fork to their finger. 3 For the qualitative 128 Hz tuning fork, absent sensation was categorized as abnormal, however, no uniform criteria has been described for decreased vibratory sensation. For the Rydel-Seiffer tuning fork, values ≤ 5 was categorized as abnormal at the distal interphalangeal joint on the second digit 7 values ≤ 4 was categorized as abnormal at the first metatarsal joint. ![]() The tuning forks were struck maximally and applied perpendicularly to the (a) dorsal head of the first metatarsal joint, and (b) distal inter-phalangeal joint on the second digit (index finger). Learn MoreĬall us at +1.818.357.5647 or send us a message here.Following training under board-certified neuromuscular physicians, the qualitative and quantitative tuning forks were tested in a consecutive fashion by neuromuscular fellows and medical students. Because of our relentless pursuit of quality, we are able to offer unrivaled warranties. Our quality and your satisfaction are important to us. MDF Instruments Stethoscope Lifetime Warranty Free-Parts-For-Life shipments will be sent to the shipping address on the original order or location of purchase. Yes, our Free-Parts-For-Life Program for MDF Instruments Stethoscopes (including eartips) is really free. Stethoscopes with engraving are not eligible for return. We give you 90 days to try our products, and if you don't love your MDF Instruments product, simply initiate a return by contacting us here. Shipments to Alaska and Hawaii do not qualify for our free shipping offer. Orders typically ship out the following business day, however please allow 1-3 business days more for orders that include customized engraving. ![]() Orders will be processed in 24 hours (excluding weekends and holidays). ![]()
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