MEASUREMENT OF INTRADISCAL PRESSURE By ALF NACHEMSON The nucleus pulposus consists of a three dimensional network of collagen fibres, enmeshed in a mucoprotein gel which contains various mucopolysaccharides (Hirsch, Paulson, SylvCn & Snellman ; Bernardi, Happey & Naylor). The water content of the nucleus pulposus dimin-

Abstract. By measurement of intradiscal pressure in vitro, the hydrostatic properties of the nucleus pulposus of normal lumbar intervertebral disc were proven. The hydrodynamic properties seem to exist also in the somewhat degenerated disc, but not in the more severely deranged ones. Intravitally-performed measurements of disc pressure over the

From a computational standpoint, comparisons with IDP should be taken only as a sanity check. Intradiscal Pressure (m mHg) 0 75 47-25 55-39 58-43 69-66 4 F 41 Traction tension (l bs) Intradiscal Pressure (m mHg) 0 60 20 30 40-76 55-110 60-126 63-117 65-160 70-106 5 M 34 Traction tension (l bs) Intradiscal Pressure (m mHg) 0 62 50-106 90-138 94-134 98-157 Table 1. Effect of lumbar traction on intradiscal pressure. Measurements in the Measurement of intradiscal pressure is instrumental in explaining, from a mechanical point, the occurrence of posterior ruptures in the lumbar discs, and provides a basis for the rational treatment of patients with low-back pain in so far as these exhibit increase of pain on increased mechanical loads. In a letter to the editor of Journal of Nuerosurgery, Dr. Alf Nachemson, whose work on intradiscal pressure is quoted in this study, stated that he believed the test results obtained were invalid on four accounts: • The design did not incorporate a closed system to measure the pressure of the disc, which Lumber intradiscal pressure : experimental studies on post-mortem materials / Alf Nachemson . Gespeichert in: PPN (Katalog-ID): 066993644 intradiscal pressure measurements showed that distraction tension routinely applied by the VAX-D equipment reduced the intradiscal pressure significantly, to negative levels in the range of-100 to -160 mm Hg. The relationship between distraction tensions and intradiscal pressure changes for three patients is presented in Table 1. 2020-01-14 · 1960’s poster adapted from Alf Nachemson’s research depicting the intradiscal pressure in the lumbar spine in various postures.

Alf nachemson intradiscal pressure

Authors. Alf Nachemson, Gösta Elfström. Publisher. Almqvist & Wiksell, 1970. Original from. the University of Michigan. 2007-02-14 · In the mid-1950s Alf Nachemson was given an assistant research position under Professor Carl Hirsch at Uppsala University Hospital.

*FREE* shipping on qualifying offers. 2020-01-14 · 1960’s poster adapted from Alf Nachemson’s research depicting the intradiscal pressure in the lumbar spine in various postures. The theory was to avoid these postures if you had back pain.

Title. Intravital Dynamic Pressure Measurements in Lumbar Discs: A Study of Common Movements, Maneuvers and Exercises. Issue 1 of Scandinavian journal of rehabilitation medicine: Supplement, ISSN 0346-8720. Authors. Alf Nachemson, Gösta Elfström. Publisher. Almqvist & Wiksell, 1970. Original from. the University of Michigan.

slumped sitting or leaning forwards seated into flexed posture. Disc pressure measurements in para- and tetraplegic patients. A study of of mobilization and exercise in para- and tetraplegic patients. Hein-Sørensen O, Elfström G, Nachemson A. The intradiscal lumbar pressure was measured in 10 patients with para- or tetraplegia and in one normal subject.

Lumbar intradiscal pressure: experimental studies on post-mortem material(1960年) The lumber Spine. An orthopaedic challenge (1976年) 外部リンク [編集] 追悼European Spine Journal; Alf Nachemson Memorial Lecture; The Truth About Back Pain

(147 lb. per sq. in.) in the subjects measured.

There is not a lot of data on intradiscal pressure (IDP) from (live) human subjects except for Alf Nachemson, Hans-Joachim Wilke, and one other person whose name escapes me. From a computational standpoint, comparisons with IDP should be taken only as a sanity check. Intradiscal Pressure in the Normal and Degenerated Discs. Early efforts of measurement of disc pressure began in the 1960s. Nachemson and Morris were the first to assess intradiscal pressure. 3 In 1965, Nachemson observed that the pressure in the AF and NP were different and that disc degeneration could alter the pressure.
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Juli 1998 wissen wir von Alf Nachemson, einem schwedischen Forscher. Titel New intradiscal pressure measurements in vivo during daily activities patients are required to undergo surgery (Deyo , Nachemson , and Mirza 2004). vertebral motion, intradiscal pressure, and the pullout force applied to the screws.

Cenh-um för monary flow-volume and pressure-flow re- lationship during 6: 32-35,1977. Nachemson A. Lumbar intradiscal pressure:.
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LUMBAR DISCOMETRY LUMBAR INTRADISCAL PRESSURE MEASUREMENTS IN VIVO. Alf Nachemson, M.D. Uppsala. Alf Nachemson. Affiliations. Biomechanics Laboratory and Department of Orthopedic Surgery, University of California, San Francisco, United States and Department of Orthopaedic Surgery, University of Gothenburg, Sweden.

The theory was to avoid these postures if you had back pain.