search:a_search_t: WFRF:Hansson Tommy H. 1943 - SwePub
Tommy Hansson Göteborgs universitet
In all cases, pressures were highest in the sitting position, about 30 per cent less in the standing position, and about 50 per cent less in the reclining than in the sitting position. 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. Intravitally-performed measurements of disc pressure over the last 20 years in more than 100 individuals have demonstrated how the load on the lumbar disc varies with the position of the subject's body and during the performance of various tasks, both in standing and in sitting. We referred to data from Nachemson and from Sato et al.
Nachemson A, Elfström G (1970) Intravital dynamic pressure measurements in lumbar discs. A study of common movements maneuvers and exercises. intradiscal pressure , 473 mbar for the C1 group, and 391 mbar for the C2 group. With 400N axial load, the F group showed intradiscal pressure of 10610 mbar, the C1 group 10132 mbar, and the C2 group 12074 mbar. Figure 1 shows a significant inter-specimen variability (p<0.001) with and without axial loading, Figure 2 also shows signifi- 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 Journal of Bone and Joint Surgery. American Volume, 46, 1077-1092.
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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: Digitized: Aug 13, 2008 Lying supine was measured to be 0.10 MPa and lying supine with knees slightly flexed was the lowest recorded value of 0.09 MPa. Sneezing while lying laterally increased pressure to.38 MPa, much higher than the 0.15 MPa caused by laughing while lying laterally. Standing pressure was found to be between 0.48 MPa to 0.50 MPa. Nachemson, A. 1963: The influence of spinal movements on the lumbar intradiscal pressure and on the tensile stresses in the annulus fibrosus. Intradiscal pressure (IDP) is the hydrostatic pressure measured in the nucleus pulposus of a non-degenerate intervertebral disc. Standing and sitting are everyday activities, which has made the findings of posture and lumbar IDP studies immediately relevant and memorable.
Sagittal halsryggställning fem år efter operation med fusion
Experimental studies on post-mortem material." by A. Nachemson アルフ・ナッケムソン （ Alf Nachemson MD, PhD、 1931年 6月1日 - 2006年 12月4日 ）は、 スウェーデン 生まれの 整形外科 医師。Professor, Sahlgrenska University Hospital and Göteborg University。.
4 Jun 2014 The L5 (last low back) disc has the greatest pressure. Pioneering Swedish orthopedic specialist and professor Alf Nachemson, MD, PhD, Based in part on his intradiscal pressure studies, Dr. Nachemson notes that 80% o
There is not a lot of data on intradiscal pressure (IDP) from (live) human subjects except for Alf Nachemson, Hans-Joachim Wilke, and one
20 Jan 2020 a leading spinal surgeon at the time called Alf Nachemson carried ( Nachemson 1965) What this study showed is that the lumbar spine is an Nachemson A. The Effect of Forward Leaning on Lumbar Intradiscal Pressure
By measurement of intradiscal pressure in vitro, the hydrostatic properties of the nucleus pulposus of normal lumbar intervertebral disc were proven. 14 Jan 2020 1960's poster adapted from Alf Nachemson's research depicting the intradiscal pressure in the lumbar spine in various postures. The theory
In the year 1976 professor Alf Nachemson published, in the first issue of the la anuloplastia intradiscal, las prótesis de núcleo pulposo y la terapia celular en
31. 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).
Im erika costell
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 .
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The L5 (last low back) disc has the greatest pressure.
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Acta Orthop. Scand . In Vivo Measurements of Intradiscal Pressure: Discometry, a Method for the Determination of Pressure in the Lower Lumbar Discs Volume 51 of Technical report, University of California Biomechanics Laboratory: Authors: Alf Louis Nachemson, James Marshall Morris: Contributor: United States.
Sagittal halsryggställning fem år efter operation med fusion
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.
The goal of this study was to measure intradiscal pressure to complement earlier data from Nachemson with dynamic and long-term measurements over a broad range of activities. Study design: We conducted intradiscal pressure measurements with one volunteer performing various activities normally found in daily life, sports, and spinal therapy. Objectives: The goal of this study was to measure intradiscal pressure to complement earlier data from Nachemson with dynamic and long-term measurements over a broad range of activities. Nachemson, A. 1963: The influence of spinal movements on the lumbar intradiscal pressure and on the tensile stresses in the annulus fibrosus. Acta Orthop. Scand.