scholarly journals The effect of spinal alignment in streamlined position on passive drag generated by towing

2019 ◽  
Vol 22 (1) ◽  
pp. 1-9
Author(s):  
Rio NARA ◽  
Ryo NABESHIMA ◽  
Daisuke SATO ◽  
Hiroshi ICHIKAWA ◽  
Yasuhiro BABA ◽  
...  
Keyword(s):  
Spinal Alignment

scholarly journals Accuracy of Rod Contouring to Desired Angles With and Without a Template: Implications for Achieving Desired Spinal Alignment and Outcomes

2021 ◽  
pp. 219256822199837
Author(s):  
Juan Pablo Sardi ◽  
Christopher P. Ames ◽  
Skye Coffey ◽  
Christopher Good ◽  
Benny Dahl ◽  
...  
Keyword(s):  
Patient Outcomes ◽  
Study Design ◽  
Preoperative Planning ◽  
Biomechanical Study ◽  
Spinal Alignment ◽  
Target Angle ◽  
Proximal Junctional Failure ◽  
Bend Angles

Study Design: Biomechanical Study. Objective: The search for optimal spinal alignment has led to the development of sophisticated formulas and software for preoperative planning. However, preoperative plans are not always appropriately executed since rod contouring during surgery is often subjective and estimated by the surgeon. We aimed to assess whether rods contoured to specific angles with a French rod bender using a template guide will be more accurate than rods contoured without a template. Methods: Ten experienced spine surgeons were requested to contour two 125 × 5.5 mm Ti64 rods to 40°, 60° and 80° without templates and then 2 more rods using 2D metallic templates with the same angles. Rod angles were then measured for accuracy and compared. Results: Average angles for rods bent without a template to 40°, 60° and 80° were 60.2°, 78.9° and 97.5°, respectively. Without a template, rods were overbent by a mean of 18.9°. When using templates of 40°, 60° and 80°, mean bend angles were 41.5°, 59.1° and 78.7°, respectively, with an average underbend of 0.2°. Differences between the template and non-template groups for each target angle were all significant (p < 0.001). Conclusions: Without the template, surgeons tend to overbend rods compared to the desired angle, while surgeons improved markedly with a template guide. This tendency to overbend could have significant impact on patient outcomes and risk of proximal junctional failure and warrants further research to better enable surgeons to more accurately execute preoperative alignment plans.

Patient-Specific Spinal Alignment and Adult Deformity Surgery

Spine ◽  
2017 ◽  
Vol 42 ◽  
pp. S14-S15 ◽  
Author(s):  
Themistocles S. Protopsaltis
Keyword(s):  
Patient Specific ◽  
Spinal Alignment ◽  
Adult Deformity

Letter to the editor regarding “Representative dynamic ranges of spinal alignment during gait in patients with mild and severe adult spinal deformities” by Mar etal

2021 ◽  
Vol 21 (6) ◽  
pp. 1042-1043
Author(s):  
Alessandro Di Bartolomeo ◽  
Luca Ricciardi ◽  
Massimo Miscusi ◽  
Mariano Serrao ◽  
Antonino Raco
Keyword(s):  
Spinal Deformities ◽  
Spinal Alignment ◽  
Letter To The Editor

Radiographic and Clinical Outcomes of Surgical Treatment of Kümmell’s Disease With Thoracolumbar Kyphosis: A Minimal Two-Year Follow-Up

2021 ◽  
Author(s):  
Hao Cheng ◽  
Guo-dong Wang ◽  
Tao Li ◽  
Xiao-yang Liu ◽  
Jian-min Sun
Keyword(s):  
Surgical Treatment ◽  
Clinical Outcomes ◽  
Sagittal Balance ◽  
Rating Scale ◽  
Clinical Results ◽  
Spinal Alignment ◽  
Thoracolumbar Kyphosis ◽  
Kummell’S Disease ◽  
Kümmell’S Disease

Abstract Background: To evaluate the short to mid-term radiographic and clinical outcomes of the restoration of normal spinal alignment and sagittal balance in the treatment of Kümmell’s disease with thoracolumbar kyphosis. Methods: Between February 2016 and May 2018,30 cases of Kümmell’s disease with thoracolumbar kyphosis were divided into two groups (A and B) according to whether the kyphosis was combined with neurological deficits.All of the cases underwent surgical treatment to regain the normal spinal alignment and sagittal balance.And the radiographic outcomes and clinical results of these 30 patients were retrospectively evaluated.The sagittal imaging parameters including sagittal vertebral axis (SVA),thoracic kyphosis (TK),thoracolumbar kyphosis (TLK),lumbar lordosis (LL),pelvic incidence (PI),pelvic tilt (PT),and sacral slope (SS)of the whole spine before operation,immediately after operation,and the last follow-up of each group were measured and evaluated.The clinical results included the Oswestry Disability Index (ODI) and the Numerical Rating Scale (NRS) of the two groups .Results: The average follow-up period of group A and B were 34.2 and 38.7 months respectively.The parameters of both groups such as SVA,TLK,and thoracolumbar Cobb angle after surgery and at the last follow-up were significantly improved compared with those before surgery.The ODI and the NRS of the two groups at the last follow-up were also significantly improved. Conclusion: In the treatment of Kümmell’s disease with thoracolumbar kyphosis,to restore the normal alignment and sagittal balance can obtain a satisfactory radiographic and clinical short and medium-term effects.

scholarly journals Influence of Skeletal Muscle Mass and Spinal Alignment on Surgical Outcomes for Lumbar Spinal Stenosis

2018 ◽  
Vol 12 (3) ◽  
pp. 556-562 ◽  
Author(s):  
Yawara Eguchi ◽  
Munetaka Suzuki ◽  
Hajime Yamanaka ◽  
Hiroshi Tamai ◽  
Tatsuya Kobayashi ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Muscle Mass ◽  
Spinal Stenosis ◽  
Lumbar Spinal Stenosis ◽  
Surgical Outcomes ◽  
Skeletal Muscle Mass ◽  
Spinal Alignment ◽  
Lumbar Spinal

Does Spinal Alignment Influence Acetabular Orientation? A Study of Spinopelvic Parameters and Sagittal Acetabular Version

2011 ◽  
Vol 11 (10) ◽  
pp. S161
Author(s):  
Kris Radcliff ◽  
Christopher Kepler ◽  
Michael Hellman ◽  
Alexander Vaccaro ◽  
Todd Albert
Keyword(s):  
Spinal Alignment ◽  
Spinopelvic Parameters ◽  
Acetabular Version ◽  
Acetabular Orientation

scholarly journals Clasped position for measurement of sagittal spinal alignment

2010 ◽  
Vol 19 (5) ◽  
pp. 782-786 ◽  
Author(s):  
Hidekazu Suzuki ◽  
Kenji Endo ◽  
Jun Mizuochi ◽  
Hiroto Kobayashi ◽  
Hidetoshi Tanaka ◽  
...  
Keyword(s):  
Spinal Alignment ◽  
Sagittal Spinal Alignment

SPINAL DEFORMITY

Neurosurgery ◽  
2008 ◽  
Vol 63 (suppl_3) ◽  
pp. A25-A39 ◽  
Author(s):  
Charles Kuntz ◽  
Christopher I. Shaffrey ◽  
Stephen L. Ondra ◽  
Atiq A. Durrani ◽  
Praveen V. Mummaneni ◽  
...  
Keyword(s):  
Literature Review ◽  
Spinal Deformity ◽  
English Literature ◽  
Spinal Alignment ◽  
New Classification ◽  
Sagittal Spinal Alignment ◽  
Asymptomatic Volunteers ◽  
Asymptomatic Individuals ◽  
Spinal Abnormality

ABSTRACT OBJECTIVE In this literature review, the authors analyze data from previously published studies that evaluated neutral upright spinal alignment (NUSA) from the occiput to the pelvis in asymptomatic individuals. Based on the data for NUSA in asymptomatic volunteers, a new classification is proposed for spinal deformity. METHODS A review of the English literature was conducted to identify studies evaluating NUSA from the occiput to the pelvis in asymptomatic juvenile, adolescent, adult, and geriatric volunteers. From the literature review, 17 angles and displacements were selected to depict neutral upright coronal and axial spinal alignment, and 21 angles and displacements were selected to depict neutral upright sagittal spinal alignment. Pooled estimates of the mean and variance were calculated for the angles and displacements from the articles that met inclusion criteria. A new classification of spinal deformity was then developed based on age-dependent NUSA; spinal abnormality; deformity curve location, pattern, magnitude, and flexibility; and global spinal alignment. RESULTS Despite a wide variation in the regional curves from the occiput to the pelvis in asymptomatic volunteers, global spinal alignment is maintained in a narrow range for preservation of horizontal gaze and balance of the spine over the pelvis and femoral heads. CONCLUSION A new classification of spinal deformity is proposed that provides a structure for defining deformity of all patient ages and spinal abnormalities.

An Analysis of Sagittal Spinal Alignment in 100 Asymptomatic Middle and Older Aged Volunteers

Spine ◽  
1995 ◽  
Vol 20 (12) ◽  
pp. 1351-1358 ◽  
Author(s):  
Daniel E. Gelb ◽  
Lawrence G. Lenke ◽  
Keith H. Bridwell ◽  
Kathy Blanke ◽  
Kevin W. McEnery
Keyword(s):  
Spinal Alignment ◽  
Sagittal Spinal Alignment
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