Computerised tomography in lumbar stenosis. A preliminary report

Postacchini, Franco; Pezzeri, G; Montanaro, Antonello; Natali, Gian Luigi

doi:10.1302/0301-620x.62b1.7351440

Cited by 37 publications

(17 citation statements)

References 14 publications

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“…to diagnose the spinal stenosis, myelography has been considered necessary (Schatzker & Pennal 1968). In recent years, however, CT-scanning (Quencer et al 1978, Postacchini et al 1980, Ullrich et al 1980) and the pulsed echo ultrasound technique (Porter et al 1978) appear to be of great value in diagnosing a narrow spinal canal. A correlation between EMG-findings and a narrowing of the lumbar canal has also been discussed (Jacobson 1976).…”

Section: Discussionmentioning

confidence: 99%

Analysis of Operated Cases with Lumbar Spinal Stenosis

Johnsson

Willner

Pettersson

1981

Acta Orthopaedica Scandinavica

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Section: Discussionmentioning

confidence: 99%

Analysis of Operated Cases with Lumbar Spinal Stenosis

Johnsson

Willner

Pettersson

1981

Acta Orthopaedica Scandinavica

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“…Information on the precise dimensions of the lower lumbar vertebrae is, however, essential, for the rational design and development of spinal implants and instrumentation such as pedicle screws and, in particular, with the evolution towards robotic surgery. Previous studies have depended on direct measurements from plain X-ray films [9,12,13,23], or from computed tomographic (CT) scans [8,11,26,34,36]. A few reports have involved the analysis of cadaveric specimens [1,7,24,27,29].…”

Section: Introductionmentioning

confidence: 99%

Geometrical dimensions of the lower lumbar vertebrae - analysis of data from digitised CT images

Zhou¹,

McCarthy²,

McGregor³

et al. 2000

European Spine Journal

185

122

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IntroductionAccurate and comprehensive anthropometric data for the lumbar spine vertebrae, a frequent site for implantation surgery, are incomplete at present. Information on the precise dimensions of the lower lumbar vertebrae is, however, essential, for the rational design and development of spinal implants and instrumentation such as pedicle screws and, in particular, with the evolution towards robotic surgery. Previous studies have depended on direct measurements from plain X-ray films [9,12,13,23], or from computed tomographic (CT) scans [8,11,26,34,36]. A few reports have involved the analysis of cadaveric specimens [1,7,24,27,29]. The value of the data has depended on the number of samples and the accuracy of Abstract The precise dimensions of the lumbar vertebrae and discs are critical for the production of appropriate spinal implants. Unfortunately, existing databases of vertebral and intervertebral dimensions are limited either in accuracy, study population or parameters recorded. The objective of this study is to provide a large and accurate database of lumbar spinal characteristics from 126 digitised computed tomographic (CT) images, reviewed using the Picture Archiving Communication System (PACS) coupled with its internal measuring instrumentation. These CT images were obtained from patients with low back pain attending the spinal clinic at the Hammersmith Hospitals NHS Trust. Measurements of various aspects of vertebral dimensions and geometry were recorded, including vertebral and intervertebral disc height. The results from this study indicated that the depth and width of the vertebral endplate increased from the third to the fifth lumbar vertebra. Anterior vertebral height remained the same from the third to the fifth vertebra, but the posterior vertebral height decreased. Mean disc height in the lower lumbar segments was 11.6 ± 1.8 mm for the L3/4 disc, 11.3 ± 2.1 mm for the L4/5, and 10.7 ± 2.1 mm for the L5/S1 level. The average circumference of the lower endplate of the fourth lumbar vertebra was 141 mm and the average surface area was 1492 mm 2 . An increasing pedicle width from a mean of 9.6 ± 2.2 mm at L3 through to 16.2 ± 2.8 mm at L5 was noted. A comprehensive database of vertebral and intervertebral dimensions was generated from 378 lumbar vertebrae from 126 patients measured with a precise digital technique. These results are invaluable in establishing an anthropometric model of the human lumbar spine, and provide useful data for anatomical research. In addition this is important information for the scientific planning of spinal surgery and for the design of spinal implants.

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“…Surgical treatment of an unstable lumbodorsal spine is a controversial matter, particularly in traumatologyT' 8 24,35,36,50,57,73,76,128,137,151 Scanographic study of the factors of radiculomedullary compression now provides a strict schedule of compressive lesions 6' 23, 38, 41,55,56,65,78,106,119,126,130 The screws we use have a fixation that goes through the cortical spongy structures of several vertebral bodies and the stresses are probably distributed evenly all along the screw and partly over the fracture site, but the resistance of this support is not to be overlooked 84' 105. These screws are supporting axes for both compression and flexion forces.…”

Section: Discussionmentioning

confidence: 99%

Percutaneous interbody osteosynthesis in the treatment of thoracolumbar traumatic or tumoural lesions

Lozes¹,

Fawaz²,

Mescola³

et al. 1990

Acta neurochir

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The authors describe a technique of percutaneous interbody osteosynthesis applicable to the dorsal and lumbar spine. 51 patients were so treated for different aetiologies: traumatic conditions (35 cases) and tumoural lesions (16 cases). The material used consisted of special instruments that are positioned in double obliquity by a percutaneous posterolateral approach. A posterior approach limited to the pathological focus was used jointly whenever a graft or a decompression was necessary (19 cases). Several types of anaesthesia were used (local, local-regional, general, neuroleptanalgesia). The patients benefited by the advantages that usually accompany percutaneous techniques. The advantages and limitations of the method are discussed.

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Computerised tomography in lumbar stenosis. A preliminary report

Cited by 37 publications

References 14 publications

Analysis of Operated Cases with Lumbar Spinal Stenosis

Analysis of Operated Cases with Lumbar Spinal Stenosis

Geometrical dimensions of the lower lumbar vertebrae - analysis of data from digitised CT images

Percutaneous interbody osteosynthesis in the treatment of thoracolumbar traumatic or tumoural lesions

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