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Analysis of boundary conditions of biomechanical models of the lumbar spine
Kocián, Ondřej ; Kovář, Jaroslav (referee) ; Vosynek, Petr (advisor)
The bachelor thesis deals with a research study of biomechanical models of the lumbar spine. After a brief anatomical introduction, this thesis describes the process of building computational models for finite element analysis and what material properties of individual tissues are usually reported in the analyses. Subsequently, boundary conditions, i.e. more precisely, constraints and different types of loading and their influence on the model behaviour are described in order to provide the most accurate interpretation with respect to the actual behaviour of the lumbar spine. The most accurate method of loading the spine appears to be the introduction of a force flow through the instantaneous centres of rotation of each vertebra, based on a research study. In the last section, an experimental attempt is carried out on a computational model with a single loading force changing its location in order to better interpret the positions of the instantaneous centres of rotation. This method can sufficiently approximate the force states in the contact surfaces. However, it needs to be experimentally verified.
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Case Study of Physiotherapeutic Treatment of a Patient after Lumbar Spine Surgery
Špatzová, Barbora ; Stupková, Michaela (advisor) ; Hořejší, Jan (referee)
v Abstract Author: Barbora Špatzová Supervisor: Mgr. Michaela Stupková Title: Case Study of Physiotherapeutic Treatment of a Patient after Lumbar Spine Surgery Objectives: The aim of this bachelor's thesis is to summarize theoretical information regarding the diagnosis of lumbar spine stenosis. Furthermore, the aim is to use the practical skills achieved during the bachelor's degree in physiotherapy at the Faculty of Physical Education and Sports of Charles University in the care of a patient after decompression surgery due to spinal canal stenosis. Methods: In order to process the theoretical part, a literature search was carried out, on the basis of which this part was created. A special part is dedicated to working with the patient, includes anamnesis, initial kinesiological analysis, proposal of short-term and long-term therapeutic plan, detailed description of therapeutic units, output kinesiological analysis and finally evaluation of the therapy effect. This is followed by a discussion where the used therapeutic methods and procedures are discussed with professional publications. Results: According to the evaluation of the therapy effect, there was a partial improvement in the overall condition of the patient, as a result of the physiotherapy care. Conclusion: Theoretical knowledge was processed and...
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Comparative analysis of physiological, degenerative and postoperative lumbar spine using computational modeling
Krejbychová, Adéla ; Návrat, Tomáš (referee) ; Vosynek, Petr (advisor)
This diploma thesis deals with the comparative analysis of the physiological, degenerative and postoperative state of the lumbar spine. The problem was solved by computational modeling using the finite element method. For this solution, it was necessary to create appropriate computational models. The spine physiological state was compared with cases of the lumbar spine with different levels of spondylolisthesis, cases of the lumbar spine with different sacral angles, and cases of lumbar spine with applied fixators. Based on the performed analyses, it was found that spine degenerative state has a great influence on the distribution of stress in the vertebral discs and the vertebra itself. Compared to the physiological state, with increasing level of the spondylolisthesis the stress in the vertebral discs increases, while the stress in the vertebral section decreases. Furthermore, the spondylolisthesis affects the force flow. The higher the level of the spondylolisthesis, the more the force flow is shifted onto the posterior articular ligaments. The best results in terms of the spine physiological state were achieved with the applied fixator model.
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Detection and segmentation of lumbar vertebrae in 3D CT data
Nemček, Jakub ; Kolář, Radim (referee) ; Jakubíček, Roman (advisor)
This thesis deals with the detection and the segmentation of lumbar vertebrae in CT image datas. The described detection method is based on the use of a trained SVM classificator and histograms of oriented gradients as the image features. The detection method is applied on two-dimensional sagital slices of the CT image. The segmentation method is implemented as triangular mesh model deformation of models, that are obtained from averaged vertebrae in real CT datas. The first part of the thesis describes essential theoretical knowledge about the anatomy of the axial skeleton, computer tomography, image processing methods and about the detection and segmentation issues. The second part contains the algorithms realisation description, the evaluation and the discussion of the results. Applications of the algorithms in CAD systems is described at the end. The application of all of the points is done in the programming software Matlab.
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Physical activity in patients after surgical treatment of lumbar spine
Plháková, Michaela ; Dudová, Agnieszka (advisor) ; Novotná, Irena (referee)
Title: Physical activity of patients after surgical treatment of the lumbar spine. Aim: Main aim of the diploma thesis is to investigate which physiotherapeutic intervention for patients after spinal surgery is the most effective one and offer optimal activity immediately after the surgery and in a long term phase. Investigate questions: 1. Which physiotherapeutic intervention is the most effective one? 2. Which type of physical activity is the most optimal one? Methods: A systematic review on the topic. Results: The review answers the questions about physiotherapy after lumbar surgery in acute and long term phase after surgery and shows current trends and unique approaches in this study area. Keywords: Lumbar spine, intervertebral disc herniation, microdiscectomy, physiotherapy, physical activity.
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Physical activity in patients after surgical treatment of lumbar spine
Plháková, Michaela ; Dudová, Agnieszka (advisor) ; Novotná, Irena (referee)
Title: Physical activity of patients after surgical treatment of the lumbar spine. Aim: Main aim of my diploma thesis is to present an up to date review on the topic of postoperative physiotherapy in short-term and long-term phase after lumbar surgery and to find out how recommendations about postoperative physiotherapy are created. Methods: A systematic review on the topic. Results: The review answers the questions about physiotherapy after lumbar surgery in short-term and long-term phase and shows current trends and unique approaches in this study area. Keywords: Lumbar spine, intervertebral disc, discectomy, physiotherapy, physical activity.
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Comparative analysis of the effect of nonlinearities on the lumbar segment stress/strain of the spine after correction of spondylolisthesis
Holá, Lucia ; Ščerba, Bořek (referee) ; Vosynek, Petr (advisor)
This final thesis focuses on the stress-strain analysis of the physiological, postoperative and degenerative state of the lumbar spine segment. The aim of this thesis is to implement nonlinear material characteristics into previously made computational models and to compare these two models. The solution is performed by computational modeling using the finite element method. The geometry model was made by modification of the previous model of geometry. The group of degenerative state models comprises of three different levels of spondylolisthesis, according to Myereding’s classification. Based on the performed analysis, it was found that the increasing severity of spondylolisthesis, as well as the change in material definition plays a huge role in the stress development in the intervertebral discs and in the vertebrae. The total deformation of the spine segment increases with the use of nonlinear material characteristics, as well as with the increasing variability from the physiological state. However, the stress distribution in the intervertebral disc decreases with the use of nonlinear material characteristics and in case of the vertebral stress distribution increases, unlike in the linear material models. The biggest similarity with the physiological state of the lumbar spine segment was found in the postoperative state using the spinal implants.
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Assessment of the strength of the lumbar spine fixator screw using stochastically entered input variables
Rapantová, Zuzana ; Hrabec, Pavel (referee) ; Vosynek, Petr (advisor)
The bachelor's thesis deals with the strength and fatigue of the spinal rod fixator. The topic is addressed by creating a computational model with two lengths of fixation screws. Simulations are performed using the Ansys software with the application of Six Sigma analysis. The strength analysis is quantified from the average load values, and the stress-strain analysis employs stochastic input variables. The results demonstrate that the modulus of elasticity of the cancellous bone significantly affects the deformation of the fixator. In the conclusion, the output data between the two lengths undergo statistical tests. Based on the acceptance of hypotheses regarding the equality of mean values, it is evaluated that a screw not passing through the entire cross-section of the cancellous bone in the vertebra is more suitable.
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A Case Study of Physiotherapy on a Patient with Vertebral Algic Syndrome of the Lower Spine
Šauerová, Lucie ; Novotná, Irena (advisor) ; Nováková, Tereza (referee)
Author: Lucie Šauerová Supervisor: Mgr. Irena Novotná Title: A Case Study of Physiotherapy on a Patient with Vertebral Algic Syndrome of the Lower Spine Objectives: The aim of this bachelor's thesis is to provide a comprehensive summary of theoretical information related to lower back pain. The work includes a list of the most suitable diagnostic and therapeutic methods to this issue. Lastly, the thesis provides a case study of physiotherapeutic care for a patient with lower back pain. Methods: Throughout the duration of the case study, I applied physiotherapeutic methods and procedures that I had acquired during my three-year study of physiotherapy at the Faculty of Physical Education and Sport in Charles University. Results: The effectiveness of physiotherapeutic care was assessed by comparing the patient's initial and final kinesiological assessment, which are summarized in the chapter titled "Evaluation of Therapy Effect". The therapy had a favorable impact on the patient's overall condition. Conclusion: This bachelor's thesis is based upon continuous professional practice. The first part of the thesis focuses on theoretical knowledge related to the problem of lower back pain. The second part of the thesis is dedicated to a specific case study of a patient suffering from this syndrome. This...
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