Surface strain gauge method for noninvasive measurements of the cervical disc pressure

Qinghua XUE; Fang YUAN; Zhenhua LIAO; Hongsheng GU; Weiqiang LIU

PDF(1119 KB)

Journal of Tsinghua University(Science and Technology) ›› 2014, Vol. 54 ›› Issue (5) : 690-694.

Orginal Article

Surface strain gauge method for noninvasive measurements of the cervical disc pressure

Author information +

History +

Abstract

Existing cervical disc pressure measurement methods have limited accuracy. This paper presents a method to measure the pressure without damaging the disc via indirect measurements. The interior strain condition and the tiny motion of the cervical disc are measured by placing a strain gauge on the front surface of the disc. The mechanical property of the disc can then be used to calculate the disc pressure. The tests showed that the measurement error was less than 15% and the correlation coefficient with invasive direct measurements was 0.79. The precision and repeatability of the surface strain method are better than the traditional method. So, this provides a noninvasive way to measure the disc pressure.

Key words

disc pressure / strain / measurement method / error analyses

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Qinghua XUE, Fang YUAN, Zhenhua LIAO, Hongsheng GU, Weiqiang LIU. Surface strain gauge method for noninvasive measurements of the cervical disc pressure[J]. Journal of Tsinghua University(Science and Technology). 2014, 54(5): 690-694

References

[1]	Shankar H, Scarlett J A, Abram S E. Anatomy and pathophysiology of intervertebral discdisease[J]. Techniques in Regional Anesthesia and Pain Management, 2009, 13: 67-75.
[2]	Nachemson A, Elfstrom G. Intravital dynamic pressure measurementsin lumbar discs[J]. Scandinavian Journal of Rehabilitation Medicine Supplement, 1970, S1: 1-40.
[3]	Farfan H F. Form and function of the musculoskeletal system as revealed by mathematical analysis of the lumbar spine[J]. Spine, 1995, 20(13): 1462-1474.
[4]	Wilke H J, Neef P, Caimi M,et al.New in vivo measurements of pressures in the intervertebral disc in daily life[J]. Spine, 1999, 24(8): 755-762.
[5]	Rohlmann A, Bergmann G, Graichen F. A spinalfixation device forin vivo load measurement[J]. Journal of Biomechanical Enginnering, 1994, 27(7): 961-967.
[6]	Rohlmann A, Bergmann G, Graichen F, et al.Influence ofmuscle forces on loads in internal spinal fixation devices[J]. Spine, 1998, 23(5): 537-42.
[7]	Jaumard N V, Bauman J A, Welch W C, et al. Pressure measurement in the cervical spinal facet joint [J]. Spine, 2011, 36(15): 1197-1203.
[8]	Chang U K, Kim D H, Lee M C, et al.Changes in adjacent-level disc pressure and facet joint forceafter cervical arthroplasty compared with cervical discectomy and fusion[J]. Journal of Neurosurgery-Spine, 2007, 7: 33-39.
[9]	Moore M K, Fulop S, Tabib-Azar M,et al.Piezoresistive pressure sensors in the measurement of intervertebraldisc hydrostatic pressure[J]. The Spine Journal, 2009, 9: 1030-1034.
[10]	Dennison C R, Wild P M, Wilson D R, et al.A minimally invasive in-fiber Bragg grating sensor for intervertebral discpressure measurements[J]. Measurement Science and Technology, 2008, 19: 085201.
[11]	DiAngelo D J, Foley K T, Faber H B. A multi-axis strut graft forcesensor to study loading mechanics of the instrumented cervicalspine [C]// Proceedings of the 44th Annual Meeting of the Orthopaedic Research Society. New Orleans, Louisiana, USA: Orthopaedic Research Society, 1998.
[12]	Rundell S A,Auerbach J D, Balderston R A,et al.Total disc replacement positioning affects facet contact forces and vertebral body strains[J]. Spine, 2008, 33(23): 2510-2517.
[13]	McGill S M. Loads on the lumbar spine and associated tissues [C]//Goel V K, Weinstein J N, ed. Biomechanics of the Spine: Clinicaland Surgical Perspective. Boca Raton, USA: Chemical Rubber Company Press, 1990: 65-96.
[14]	Dolan P, Adams M A, Kingma I, et al.The validity of measurements of spinal loading during manualhandling [C]// Proceedings of the 44th Annual Meeting of the Orthopaedic Research Society. New Orleans, Louisiana, Chicago, USA: Orthopaedic Research Society, 1998.
[15]	XUE Qinghua, LIU Weiqiang, LIAO Zhenhua. The method exploration for measuring the strain of the intervertebral disc[J].Modern Instrumentation, 2013, 2(2): 21-25.