Relevant bibliographies by topics / Malleable Spinal Fixation Device

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Malleable Spinal Fixation Device'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Malleable Spinal Fixation Device"

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Manek, Filip, Petr Marcián, Zdeněk Florian, Jiří Valášek, and Veronika Ebringerová. "Biomechanical Study of Lumbar Spinal Fixation Device." Applied Mechanics and Materials 232 (November 2012): 142–46. http://dx.doi.org/10.4028/www.scientific.net/amm.232.142.

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This article is focused on computational modeling of an interaction of malleable lumbar spine fixation device with ambient bone tissue focusing on solving problems of clinical practise. It describes creation of computational model including model of geometry, materials, loads and constraints. There is a comparative stress strain analysis of spinal segment after fixation device application with its physiological state. Computations are performed with use of FEM method. To simulate natural way of loading we used the compression of motional spinal segment. Results show the difference between the system including intervertebral disc in between vertebras and the system with applied lumbar spinal fixation device.
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Perrin, Richard G., and Robert J. McBroom. "Spinal Fixation after Anterior Decompression for Symptomatic Spinal Metastasis." Neurosurgery 22, no. 2 (1988): 324–27. http://dx.doi.org/10.1227/00006123-198802000-00008.

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Abstract Surgical strategies for the treatment of symptomatic spinal metastases must take into account both decompression of the spinal cord and stabilization of the spinal column. A method is described for securing spinal stabilization in patients who have undergone surgical decompression for symptomatic spinal metastases by an anterior approach. The fixation device used is a tailor-made prosthesis consisting of a U-shaped stainless steel plate permitting screw fixation to secure axial and rotational stability with an interposed methyl methacrylate strut to provide axial strength and support. The device has been used successfully in 51 patients who have undergone anterior decompression procedures for symptomatic spinal metastases. (Neurosurgery 22:324-327, 1988)
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Mohanty, Mira, Sulekha Baby, and K. V. Menon. "Spinal Fixation Device: A 6-Year Postimplantation Study." Journal of Biomaterials Applications 18, no. 2 (2003): 109–21. http://dx.doi.org/10.1177/088532803034746.

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Rohlmann, Antonius, Georg Bergmann, and Friedmar Graichen. "Loads on an internal spinal fixation device during walking." Journal of Biomechanics 30, no. 1 (1997): 41–47. http://dx.doi.org/10.1016/s0021-9290(96)00103-0.

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Rohlmann, Antonius, Ulrike Arntz, Friedmar Graichen, and Georg Bergmann. "Loads on an internal spinal fixation device during sitting." Journal of Biomechanics 34, no. 8 (2001): 989–93. http://dx.doi.org/10.1016/s0021-9290(01)00073-2.

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Rohlmann, A., G. Bergmann, and F. Graichen. "An instrumented spinal skeletal fixation device for load measurements." Journal of Biomechanics 24, no. 6 (1991): 478. http://dx.doi.org/10.1016/0021-9290(91)90120-c.

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Rohlmann, A., G. Bergmann, and F. Graichen. "A spinal fixation device for in vivo load measurement." Journal of Biomechanics 27, no. 7 (1994): 961–67. http://dx.doi.org/10.1016/0021-9290(94)90268-2.

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Rohlmann, Antonius, Friedmar Graichen, and Georg Bergmann. "Loads on an Internal Spinal Fixation Device During Physical Therapy." Physical Therapy 82, no. 1 (2002): 44–52. http://dx.doi.org/10.1093/ptj/82.1.44.

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Abstract Background and Purpose. Modified internal spinal fixation devices allow the measurement of the forces and moments acting on the implants. The aim of this study was to measure the loads on internal fixation devices for selected body positions and movements during physical therapy. Subjects and Methods. Loads on an internal spinal fixation device were measured in 10 patients with degenerative instability or compression fractures using a telemeterized implant. Results. Relatively low implant loads were found in the recumbent body positions. Most exercises performed in a lying position caused implant loads less than that measured for standing and are therefore not likely to increase the risk of screw breakage. Fixation device loads were lower for sitting relaxed than for standing. The highest implant loads (128% of the value for standing) were measured during walking. Standing up, sitting down, and lateral bending and axial rotation of the upper body while standing led to fixation device loads between 111% and 120% related to the value for standing. Even higher fixation device loads were measured for ventral flexion and extension of the upper body while standing. Kneeling on hands and knees, and flexing and extending the back in this position, caused implant loads that were lower than for standing. Discussion and Conclusion. Standing up, sitting down, and lateral bending and axial rotation of the upper body while standing may slightly increase the risk of pedicle screw breakage, whereas ventral flexion and extension of the upper body while standing may increase this risk considerably if the region bridged by the implant is distracted (the distance between upper and lower screws was increased) during surgery. However, walking is the exercise that plays the major role concerning pedicle screw breakage because it causes the highest bending moments of all exercises studied and it loads the fixation devices most frequently.
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Liu, Chong, Zide Zhang, Yuan Ma, et al. "Predicting the Failure Risk of Internal Fixation Devices in Chinese Patients Undergoing Spinal Internal Fixation Surgery: Development and Assessment of a New Predictive Nomogram." BioMed Research International 2021 (January 26, 2021): 1–13. http://dx.doi.org/10.1155/2021/8840107.

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The current study is aimed at developing and validating a nomogram of the risk of failure of internal fixation devices in Chinese patients undergoing spinal internal fixation. We collected data from a total of 1139 patients admitted for spinal internal fixation surgery at the First Affiliated Hospital of Guangxi Medical University from May 2012 to February 2019. Of these, 1050 patients were included in the spinal internal fixation group and 89 patients in the spinal internal fixation device failure group. Patients were divided into training and validation tests. The risk assessment of the failure of the spinal internal fixation device used 14 characteristics. In the training test, the feature selection of the failure model of the spinal internal fixation device was optimized using the least absolute shrinkage and selection operator (LASSO) regression model. Based on the characteristics selected in the LASSO regression model, multivariate logistic regression analysis was used for constructing the model. Identification, calibration, and clinical usefulness of predictive models were assessed using C-index, calibration curve, and decision curve analysis. A validation test was used to validate the constructed model. In the training test, the risk prediction nomogram included gender, age, presence or absence of scoliosis, and unilateral or bilateral fixation. The model demonstrated moderate predictive power with a C-index of 0.722 (95% confidence interval: 0.644–0.800) and the area under the curve (AUC) of 0.722. Decision curve analysis depicted that the failure risk nomogram was clinically useful when the probability threshold for internal fixation device failure was 3%. The C-index of the validation test was 0.761. This novel nomogram of failure risk for spinal instrumentation includes gender, age, presence or absence of scoliosis, and unilateral or bilateral fixation. It can be used for evaluating the risk of instrumentation failure in patients undergoing spinal instrumentation surgery.
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Shahrokni, M., Q. Zhu, J. Liu, W. Tetzlaff, and T. R. Oxland. "Design and biomechanical evaluation of a rodent spinal fixation device." Spinal Cord 50, no. 7 (2012): 543–47. http://dx.doi.org/10.1038/sc.2011.185.

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Dissertations / Theses on the topic "Malleable Spinal Fixation Device"

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Manek, Filip. "Mechanická studie interakce páteřního segmentu s poddajným fixátorem." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-234219.

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This doctoral thesis is focused on comparative stress strain analysis of a spinal segment with a malleable fixation device and a physiologic spinal segment. In its opening a research study from available sources is carried out. It covers the contemporary state of scientific studies in the given area, anatomy of individual components of the spine, material properties, ways and magnitudes of loadings and also the most common FE model used in similar problems solved. To create a model of geometry of a spinal segment CT scans of a spinal segment of a 38-year-old woman are used. Then they are subsequently used in the modeling software SolidWorks to create the model of geometry of two lumbar vertebras L4 - L5 and a malleable fixation device. Using the computational system ANSYS Workbench, the complete computational model of the spinal motional segment with a malleable fixation device is compiled, covering models of material, loading and bonds. On the basis of the computational solution of FEM models for different ways of loading, a stress-strain analysis is performed. To compare obtained results a detailed comparative analysis with the physiological spinal segment, the segment with the degenerated disc and the segment with applied "rigid" fixation device is carried out. Within the stress strain analysis of the spinal segment with malleable fixation device, an analysis of the magnitude of the strain intensity of spongious bone tissue around the implanted transpedicular screw, depending on the cord pretension of the malleable fixation device, is performed.
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Shahrokni, Maryam. "Design and biomechanical evaluation of a rodent spinal fixation device." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/29401.

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Previous experimental studies of spinal cord injury (SCI) in rodents established the importance of fixation of the spine in survival models following a mechanical injury. However, no fixation device has been designed to provide spinal stabilization, prevent additional damage to the cord, and promote fusion at the site of injury. The present study aims to design a novel rat spinal fixation device, which will be used in future survival studies and investigates its biomechanical effectiveness in stabilizing the spine up to eight weeks post injury. A custom-made magnetic resonance imaging (MRI) compatible fixation device was designed to stabilize the C5/C6 joint. This was achieved in an animal model by creating a 1.5 mm fracture-dislocation injury between C5 and C6 spinal segments of Sprague-Dawley rats using a multimechanism SCI test system. A biomechanical evaluation of the device-spine system was conducted at these segments. Cycles of stepwise directed shear forces with a maximum of 0.98 N were applied at a known distance from the injured site producing flexion and extension bending moments, while the resulting two-dimensional motions between C5 and C6 were measured and presented in the form of load-displacement curves. This was implemented at two time points: immediately (n = 6), and eight weeks post-injury (n = 9) and the results were compared to an intact group (n = 6). Average ± S.D. flexion/extension ranges of motion (ROM) were 18.1 ± 3.3º, 19.9 ± 7.5º, and 1.5 ± 0.7º, and neutral zones (NZ) were 3.4 ± 2.8º, 5.0 ± 2.4º, and 0.7 ± 0.5º, respectively for the intact, injured/fixed, and injured/8-week groups. The results show that there is a significant difference in ROM and NZ between the injured/fixed and injured/8-week groups (p-values = 0.0002, and 0.006, respectively). The device acutely stabilizes the spine by restoring its stiffness to the initial stiffness of the intact specimen. It also proves that along with the biological factors over time, fusion is promoted at the site of injury. This study presents the design and evaluation of a novel well-characterized spinal fixation device for rats, which will be used in future experimental SCI survival models.
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Books on the topic "Malleable Spinal Fixation Device"

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Frost & Sullivan., ed. U.S. orthopedic prosthetic device and instrument markets: Spinal fixation market rebounds with new growth potential. Frost & Sullivan, 1994.

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Book chapters on the topic "Malleable Spinal Fixation Device"

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Hartensuer, René, and Maarten Spruit. "New Techniques and MIS: The Interfacet Fixation with Facet Wedge Device." In Modern Thoraco-Lumbar Implants for Spinal Fusion. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60143-4_12.

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"103 PYRAMID Plate Anterior Lumbosacral Fixation Device." In Spinal Instrumentation: Surgical Techniques, edited by Daniel H. Kim, Alexander R. Vaccaro, and Richard G. Fessler. Georg Thieme Verlag, 2005. http://dx.doi.org/10.1055/b-0034-75927.

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Rohlmann, Antonius, Friedmar Graichen, and Georg Bergmann. "Loads on an Internal Spinal Fixation Device Measured In Vivo." In Advances in Spinal Fusion. CRC Press, 2003. http://dx.doi.org/10.1201/9780203912935.ch46.

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"The Lumbar Alligator Spinal SystemTM—A Simple and Less Invasive Device for Posterior Lumbar Fixation." In Spinal Reconstruction. CRC Press, 2007. http://dx.doi.org/10.3109/9781420020960-9.

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Conference papers on the topic "Malleable Spinal Fixation Device"

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Cavanagh, Daniel P., Asena Abay, Jessica M. Brito, Jasmine R. Joyner, Jordyn N. Nally, and Xianren Wu. "A Novel Epidural Catheter Fixation Device." In 2017 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dmd2017-3490.

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Epidurals are a method of long-term pain relief administered by injecting and continuously delivering an anesthetic via catheter in the spine. This method of pain relief is often used for patients in the Obstetrics/Gynecology unit as well as those in pre- and post-operational care. For almost 2 million singleton vaginal deliveries across 27 states in 2008 (representing 65% of all US singleton vaginal births in 2008), 61% of patients received some form of an epidural or spinal injection [1]. Additionally, this number has been increasing. For the 18 states for which 2006 and 2008 data are available, the average of the state-level increases in epidural/spinal injections is approximately 4.2% revealing an overall increase in these injections. Just between 2000 and 2010, the use of epidural injections increased by 160% [2]. Commonly, epidural catheters are inserted into the patient’s back in the appropriate location and then secured to the body with an adhesive medical dressing. Movement and subsequent dislocation of the catheter beneath the adhesive medical dressing can result in inefficient anesthetic delivery, increased patient discomfort, and repeated administration of the epidural. Secondary migration of epidural catheters is a problem responsible for failure in approximately 6.8% of epidurals administered [3]. Requiring an anesthesiologist to repeat the procedure is also an increased cost. A solution to secondary migration of epidural catheters would ensure effective delivery of the anesthetic to the patient, reduce the need for a repeated procedure, and prevent unwanted additional healthcare expenses.
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Halverson, Peter A., Larry L. Howell, and Anton E. Bowden. "A Flexure-Based Bi-Axial Contact-Aided Compliant Mechanism for Spinal Arthroplasty." In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-50121.

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A healthy spinal disc is capable of 3 degrees of rotation and has a force-deflection response that helps to stabilize the spine. Age or trauma can cause the stability of the spine to decrease. Spinal fusion, the current surgical treatment of choice, stabilizes the spine by rigid fixation, reducing spinal mobility at the cost of increased stress at adjacent levels. This paper introduces a compliant mechanism that has the potential to closely mimic the physiological motion profile of the natural spinal disc. Compliant mechanisms have properties that make them well suited for spinal implants that restores the range of motion and the forcedeflection response of the spine. This paper presents an introduction to the biomechanics of the spinal disc, reviews the state of the art in spinal care, and proposes the use of the Flexure-based Bi-Axial Contact-aided (Flex-BAC) compliant mechanism as a spinal arthroplasty device (artificial disc). The Flex-BAC compliant mechanism offers the potential to restore both the kinematics and kinetics of a damaged spinal disc. The disc provides the ability to eliminate wear through rolling. An overview of the device and a preliminary kinematic and kinetic analysis are given.
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DiAngelo, Denis J., Elizabeth J. Sander, Nephi A. Zufelt, Brian P. Kelly, and Kevin T. Foley. "Low Endurance Testing of a Spinous Process Spacer." In ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-192985.

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Lumbar neurogenic claudication secondary to spinal stenosis causes narrowing of the spinal canal that contributes to extremity lower back pain. Lumbar extension, as seen in standing and walking, exacerbates symptoms by decreasing the foraminal height, width, and area, whereas flexion, as seen in sitting, improves symptoms by increasing the cross-sectional area of the foramen. Interspinous process devices have been developed to treat symptomatic lumbar stenosis [1]. The device is placed between the spinous processes and serves to limit the amount of extension that can occur beyond a neutral alignment. The objective of this study was to perform low endurance cyclic tests on the In-Space spinous process spacer (Synthes Spine) to assess fixation and containment in a human cadaveric spine model in vitro. The device was cyclically tested under an alternating sequence of combined loading conditions using a new protocol developed on a robotic based spinal testing system (Spine Robot).
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