Biotelemetric passive sensor injected within tendon for strain and elasticity measurement

A passive and injectable (using hypodermic needle) biotelemetric sensor for measurements of tendon length changes has been developed. From these measurements tendon strain and Young's modulus of elasticity can be derived. The sensor(about 2.1 times 29mm) is a LC circuit fixed in tendon by metallic anchors (barbs), where the value of the resonance frequency is modulated by displacement of a mobile ferrite core. The sensor was injected into digital extensor tendon of pig,allowing the determination of its stress-strain curve and, consequently, of Young's modulus of elasticity of the tendon. Practical results, such as sensitivity of 18.199kHz/mm (correlation coefficient of 0.9891)for strains up to 5.17%, mechanical hysteresis of 6.5%, and Young's modulus of 0.9146 GPa for a pig tendon (post mortem),are presented and discussed

[1]  Gian Marco Revel,et al.  Measurement of stress-strain and vibrational properties of tendons , 2003 .

[2]  M. Voigt,et al.  Dynamic viscoelastic behavior of lower extremity tendons during simulated running. , 2000, Journal of applied physiology.

[3]  Nathalie Crevier-Denoix,et al.  Strain and force transducers used in human and veterinary tendon and ligament biomechanical studies. , 2004, Clinical biomechanics.

[4]  Mani Soma,et al.  Radio-Frequency Coils in Implantable Devices: Misalignment Analysis and Design Procedure , 1987, IEEE Transactions on Biomedical Engineering.

[5]  P H Peckham,et al.  The monitoring of tendon tension with an implantable intratendon probe and its use in the control of neuroprostheses. , 1997, IEEE transactions on rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society.

[6]  Braden C. Fleming,et al.  In Vivo Measurement of Ligament/Tendon Strains and Forces: A Review , 2004, Annals of Biomedical Engineering.

[7]  Sérgio Francisco Pichorim,et al.  Design of coils for millimeter- and submillimeter-sized biotelemetry , 2004, IEEE Transactions on Biomedical Engineering.

[8]  A. Biewener,et al.  In vivo muscle force-length behavior during steady-speed hopping in tammar wallabies. , 1998, The Journal of experimental biology.

[9]  J P Paul,et al.  Hysteresis measurements in intact human tendon. , 2000, Journal of biomechanics.

[10]  R. M. Alexander,et al.  Tendon elasticity and muscle function. , 2002, Comparative biochemistry and physiology. Part A, Molecular & integrative physiology.

[11]  K. Najafi,et al.  A single-channel implantable microstimulator for functional neuromuscular stimulation , 1997, IEEE Transactions on Biomedical Engineering.

[12]  Rudolf Artmann,et al.  Electronic identification systems: state of the art and their further development , 1999 .

[13]  W. Olson,et al.  BASIC CONCEPTS OF MEDICAL INSTRUMENTATION , 2008 .