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Abstracts of the 10th Annual Meeting of the Lumbar Spine Research Society Chicago, Illinois • April 6 & 7, 2017

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Abstracts of the 2013 Annual Meeting of the Lumbar Spine Research Society, Chicago, Illinois • April 11–12, 2013

junctional kyphosis (PJK) is a well-recognized complication of adult spinal deformity correction. Previously published studies have focused on all age groups and identified age older than 55 years as a consistent risk factor. Other risk factors remain controversial. This study is the first to assess risk of PJK and proximal junctional failure (PJF) specifically in the older patient population. Methods: Retrospective review of 198 consecutive patients over age 55 years, treated operatively at a single institution for spinal deformity. Radiographic measurements and

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Abstracts of the Eighth Annual Meeting of the Lumbar Spine Research Society Chicago, Illinois • April 9–10, 2015

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Abstracts of the Ninth Annual Meeting of the Lumbar Spine Research Society Chicago, Illinois • April 14–15, 2016

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Abstracts of the 2012 Meeting of the Lumbar Spine Research Society April 26–27, 2012

. Standard outcome and radiographic measurements were measured. Results: Average follow-up was 13.5 months. Average ORT, EBL, and LOS were 206 minutes, 83cc, and 1.29 days, respectively. Complications occurred in three (5%) patients: one MI, one urinary retention, and one delayed mild dorsiflexion weakness which completely resolved by 3 months. Transient approach-related thigh/groin pain was observed in five (8%) cases, all resolved by 3 months. At one year, LBP and LP improved 73% (8.0 to 2.2) and 68% (7.7 to 2.5), respectively (p<0.001), ODI decreased 52% from 42

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Radiographic predictors of delayed instability following decompression without fusion for degenerative Grade I lumbar spondylolisthesis

Clinical article

Claire Blumenthal, Jill Curran, Edward C. Benzel, Rachel Potter, Subu N. Magge, J. Frederick Harrington Jr., Jean-Valery Coumans, and Zoher Ghogawala

excluded. Mechanical back pain was defined as back pain produced by standing for > 5 min or by lifting > 20 lbs. This type of back pain was relieved in all patients by lying supine. Approval from the institutional review board at Greenwich Hospital was obtained prior to initiating the study. Informed consent was obtained in all patients. This clinical trial is registered as the Greenwich Lumbar Stenosis SLIP Study (clinical trial registration no. NCT00109213, www.clinicaltrials.gov ). Radiographic Measurements In all patients lumbar flexion-extension plain

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Modified fenestration with restorative spinoplasty for lumbar spinal stenosis

Technical note

Ko Matsudaira, Takashi Yamazaki, Atsushi Seichi, Kazuto Hoshi, Nobuhiro Hara, Satoshi Ogiwara, Sei Terayama, Hirotaka Chikuda, Katsushi Takeshita, and Kozo Nakamura

measurements for segmental sagittal alignment. Segmental sagittal alignment was defined as the angle between the inferior margin of the superior vertebra and the superior margin of the inferior vertebra on neutral position in a lateral radiograph. This angle was measured at each of the levels decompressed. F ig . 5. Schematic illustration of the radiographic measurements for intervertebral range of motion. Intervertebral range of motion was determined on dynamic view as the following: α − (−β). F ig . 6. Illustrations of the radiographic measurements of

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Can we use shorter constructs while maintaining satisfactory sagittal plane alignment for adult spinal deformity?

Hiroshi Moridaira, Satoshi Inami, Daisaku Takeuchi, Haruki Ueda, Hiromichi Aoki, Takuya Imura, and Hiroshi Taneichi

exacerbated by maintaining a standing position or walking that had not improved after at least 1 year of conservative therapy. Nineteen of the 37 patients also had leg pain due to spinal canal stenosis or foraminal stenosis. The UIV was selected as the UEV of lumbar scoliosis. The LIV was selected as L5 or S1 according to the status of the L5–S1 disc, assessed by determining whether or not the patient experienced significant lumbosacral discomfort and whether there was radiographic evidence of disc degeneration on MRI. Radiographic Measurements and Patient Outcomes

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Clinical significance of the C2 slope after multilevel cervical spine fusion

Namhoo Kim, Kyung-Soo Suk, Ji-Won Kwon, Joonoh Seo, Hunjin Ju, Byung Ho Lee, Seong-Hwan Moon, Hak-Sun Kim, and Hwan-Mo Lee

obstructed on plain radiographs. 9 The radiographic measurements were defined as follows: 1) C2S = the angle between the lower endplate of C2 and the horizontal plane; 11 2) cSVA = the distance between the C2 plumb line and the superior posterior endplate of C7; 13 3) C2–7 lordosis = the Cobb angle between the lower endplates of C2 and C7; 14 and 4) T1S = the angle between the upper endplate of T1 and the horizontal plane ( Fig. 2 ). 15 , 16 Two independent observers (spine fellows, N.K. and J.S.) measured the parameters, and each observer repeated the measurements

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Radiological evaluation of cervical spine involvement in rheumatoid arthritis

Andrei F. Joaquim, Enrico Ghizoni, Helder Tedeschi, Simone Appenzeller, K. Daniel Riew, and MD

the plain radiographic measurements are in the normative range. Lateral Displacement of the Atlas Over the Axis The open-mouth view is useful for evaluating lateral AAS. Rotatory AAS should be suspected when there is asymmetry or lateral displacement of the atlas on the axis by more than 2 mm in an open-mouth view. 1 It should also be suspected when there is asymmetrical collapse of the lateral atlas mass. 1 Lateral displacement can also occur with fractures of the dens. A CT scan should be performed to confirm the diagnosis. Cranial Settling Cranial