Is There a Difference in Shape of the Endplates in Sagittal Plane? A Morphometric Study of the Lumbosacral Spine

2010 ◽  
Vol 10 (9) ◽  
pp. S46 ◽  
Author(s):  
Palaniappan Lakshmanan ◽  
Vlasta Dvorak ◽  
Walter Schratt ◽  
Sathya Thambiraj ◽  
Iona Collins ◽  
...  
Keyword(s):  
Sagittal Plane ◽  
Morphometric Study ◽  
Lumbosacral Spine

Ventricular catheter trajectories from traditional shunt approaches: a morphometric study in adults with hydrocephalus

2008 ◽  
Vol 108 (5) ◽  
pp. 930-933 ◽  
Author(s):  
Christopher R. P. Lind ◽  
Amy M. C. Tsai ◽  
Andrew J. J. Law ◽  
Hui Lau ◽  
Kavitha Muthiah
Keyword(s):  
Sagittal Plane ◽  
Statistical Significance ◽  
Catheter Insertion ◽  
Adult Patients ◽  
Patient Specific ◽  
Morphometric Study ◽  
Ventricular Catheter ◽  
Mr Images ◽  
Frontal Horn ◽  
Margin Of Error

Object The purpose of this study was to compare the margins of error of different shunt catheter approaches to the lateral ventricle and assess surface anatomical aiming landmarks for free-hand ventricular catheter insertion in adult patients with hydrocephalus. Methods Four adults who had undergone stereotactic brain magnetic resonance (MR) imaging and had normal ventricles, and 7 prospectively recruited adult patients with acute hydrocephalus were selected for inclusion in this study. Reconstructed MR images obtained prior to surgical intervention were geometrically analyzed with regard to frontal, parietal, and parietooccipital (occipital) approaches in both hemispheres. Results The ventricular target zones were as follows: the frontal horn for frontal and occipital approaches, and the atrium/ posterior horn for parietal approaches. The range of possible angles for successful catheter insertion was smallest for the occipital approach (8° in the sagittal plane and 11° in the coronal plane), greater for parietal catheters (23 and 36°), and greatest for the frontal approach in models of hydrocephalic brains (42 and 30°; p < 0.001 for all comparisons except frontal vs parietal, which did not reach statistical significance). There was no single landmark for aiming occipital or parietal catheters that achieved ventricular target cannulation in every case. Success was achieved in only 86% of procedures using occipital trajectories and in 66% of those using parietal trajectories. Conclusions The occipital approach to ventricular catheter insertion provides the narrowest margin of error with regard to trajectory but has less aiming point variability than the parietal approach. The use of patient-specific stereotaxy rather than generic guides is required for totally reliable, first-pass ventricular catheterization via a posterior approach to shunt placement surgery in adults.

Value of Lumbar Lordosis and Back Pain in the Female Population Over 50 Years of Age

2020 ◽  
Vol 62 (1) ◽  
pp. 22-26
Author(s):  
Gustaw Wójcik ◽  
Elżbieta Rutkowska ◽  
Ihor Mysula ◽  
Adam Szepeluk
Keyword(s):  
Back Pain ◽  
Lumbar Lordosis ◽  
Sagittal Plane ◽  
Lumbosacral Spine ◽  
Female Population ◽  
Planning Treatment ◽  
Average Pain ◽  
The Individual ◽  
The Relationship ◽  
Similar Intensity

Introduction: In highly developed societies, back pain is a fairly common phenomenon, and its causes are usually multifactorial. Backaches can be caused by improper body posture, anatomical conditions, overloads, inflammation and many other factors. Changes in the shape of the spine in the sagittal plane, such as shallowing or deepening physiological curves translate into a change in the distribution of forces acting on individual parts of the spine, overloading the axial organ of movement. Aim: The aim of the study was to determine the relationship between the individual variants of lordosis (hypolordosis, hyperlordosis, norm) and pain experienced by women in the area of the lumbosacral spine (L/S). Material and Methods: The study group was a population of women over 50 (n = 277), divided into three subgroups, i.e. women with: normal, shallow and deepened lordosis, evaluated in the sagittal view in computed tomography imaging studies. Results: Deepened lordosis is associated with the highest BMI = 27.30 but a rather low average pain value (VAS = 4.60), which approximately corresponded to the severity of the discomfort in the group of women with normal lumbar lordosis. Shallow lordosis correlates with a lower BMI = 26.60 and the highest level of pain (VAS = 6.67). When the lordosis angle was normal, the pain was the lowest. Conclusions: The size of the lordosis angle may be a predictor of the occurrence of pain. A larger lumbar lordosis angle correlates with a higher body weight but pain in this group of women occurs with similar intensity as in the group of women with a normal lumbar lordosis angle.The research results indicate a strong correlation (p <0.0229) between shallow lordosis and the severity of pain experienced by the examined women, which should be taken into account when planning treatment.

scholarly journals Reliability and reproducibility of measurements in para-sagittal planes on sub-axial cervical vertebral bodies: a morphometric study of endplates in three-dimensional models

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Long Wang ◽  
Hao T. Luo ◽  
Wei Lu ◽  
Xing Bo Cai ◽  
Chen Yu ◽  
...  
Keyword(s):  
Vertebral Body ◽  
Sagittal Plane ◽  
Observer Agreement ◽  
Rank Test ◽  
Morphometric Study ◽  
Body Model ◽  
Observer Reliability ◽  
Morphological Studies ◽  
Interclass Correlation ◽  
Cervical Vertebral Body

Abstract Background Dimensional measurements have been implemented on a variety of entities in morphological studies of the sub-axial cervical vertebral endplate. Despite great progress, little information between the mid-sagittal plane and bilateral uncinate processes has been acquired due to the lack of a reliable method to determine the para-sagittal planes. Also, few studies of this region are available. We proposed a new approach to defining the para-sagittal planes on a 3D cervical vertebral body model; in this approach, dimensions can be measured in a specific plane. The aim of this study was to assess the inter-observer and intra-observer reliability of the measurements in different sagittal planes on sub-axial cervical vertebral endplates of 3D models. Methods We established mid-sagittal and bilateral quarter para-sagittal planes on the 3D model of a sub-axial cervical vertebral body based on landmarks labeled on the surface. By intersecting the vertebral body with the planes, three curves located at the three para-sagittal planes were generated. Linear dimensions were measured on every curve by two observers separately, and in total, 24 sub-axial cervical spines were included in the study. The first observer (O1) performed the procedure twice with an interval of 2 weeks. The paired t test, Wilcoxon matched-pairs signed-rank test and the interclass correlation coefficient (ICC) were employed to evaluate the inter- and intra-observer reliability of the proposed method. Results There were no significant differences in most intra- and inter-observer comparisons, and higher non-significant proportions were found in the intra-observer comparisons than in comparisons between different observers. The interclass correlation coefficients (ICCs) in the measurements were excellent (> 0.75) in most circumstances, and the values in intra-observer comparisons were higher than those in inter-observer comparisons. Conclusions In this study, we proposed an approach to determine the bilateral quarter para-sagittal planes in a 3D cervical vertebral body model; the results demonstrated that the method is reproducible with high intra- and inter-observer agreement.

Minimizing Septectomy for Endoscopic Transphenoidal Approaches to the Sellar and Suprasellar Regions: A Cadaveric Morphometric Study

2014 ◽  
Vol 75 (S 01) ◽  
Author(s):  
H. Garcia ◽  
M. Pyfer ◽  
S. Singhal ◽  
M. Otten ◽  
A. Iloreta ◽  
...  
Keyword(s):  
Morphometric Study

Secondary Fractures Following Internal Fixation in Two Horses

1989 ◽  
Vol 02 (03) ◽  
pp. 125-128
Author(s):  
E. M. Gaughan ◽  
N. G. Duchar
Keyword(s):  
Internal Fixation ◽  
Sagittal Plane ◽  
Proximal Phalanx ◽  
Fracture Repair ◽  
Fracture Line ◽  
Carpal Bone ◽  
Fracture Plane ◽  
The Third ◽  
Lag Screw ◽  
Secondary Fractures

SummaryImplant associated fractures have not been reported in horses. Two horses were evaluated for fractures in the fore limbs, occurring subsequent to previous fracture repair. Previously, the horses had sustained fractures of unusual configurations which were repaired using internal fixation. Following repair and healing of the fractures, secondary fractures occurred in the same bone, but in a different (more common) configuration. The first horse was evaluated ten months following lag screw fixation of a longitudinal fracture of the proximal phalanx in a frontal plane. This horse presented with a more typical comminuted fracture in the sagittal plane with the screws from the first fixation lying in the fracture line. This fracture was successfully treated with a cast. The second horse was examined eightteen months after repair of a medial sagittal slab fracture of the third carpal bone. The horse presented with a more typical dorsal slab fracture of the third carpal bone with the previously placed lag screw lying in the fracture line. The screw was removed and a lag screw was placed perpendicular to the new fracture plane through the dorsal surface of the third carpal bone to repair the fracture.

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