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https://www.readbyqxmd.com/read/29435500/three-dimensional-reconstructions-of-lenke-1a-curves
#1
J-C Bernard, E Berthonnaud, J Deceuninck, L Journoud-Rozand, G Notin, E Chaleat-Valayer
Background: Scoliosis is a 3D deformity that can be reconstructed through 2D antero-posterior and lateral radiographs, which provide an upper view of the deformed spine as well as regional planes matching all vertebrae of elective plane for each curve. The objective of this study is to explore whether all idiopathic scoliosis classified Lenke 1A have the same 3D representation made with regional planes. Methods: All patients treated for idiopathic thoracic scoliosis during the growth period and classified Lenke 1A were included in this study conducted in the pediatric spinal orthopedic department of Centre des Massues...
2018: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/29429610/automated-ultrafast-kilovoltage-megavoltage-cone-beam-ct-for-image-guided-radiotherapy-of-lung-cancer-system-description-and-real-time-results
#2
Manuel Blessing, Anna Arns, Hansjoerg Wertz, Dzmitry Stsepankou, Judit Boda-Heggemann, Juergen Hesser, Frederik Wenz, Frank Lohr
PURPOSE: To establish a fully automated kV-MV CBCT imaging method on a clinical linear accelerator that allows image acquisition of thoracic targets for patient positioning within one breath-hold (∼15s) under realistic clinical conditions. METHODS AND MATERIALS: Our previously developed FPGA-based hardware unit which allows synchronized kV-MV CBCT projection acquisition is connected to a clinical linear accelerator system via a multi-pin switch; i.e. either kV-MV imaging or conventional clinical mode can be selected...
February 8, 2018: Zeitschrift Für Medizinische Physik
https://www.readbyqxmd.com/read/29428293/impact-of-spine-alignment-on-the-rotator-cuff-in-long-term-wheelchair-users
#3
Yasser Kentar, Manuela Brunner, Thomas Bruckner, Andreas Hug, Patric Raiss, Felix Zeifang, Markus Loew, Haidara Almansour, Michael Akbar
BACKGROUND: We investigated the impact of poor seated posture on the prevalence of rotator cuff tears (RCTs) among wheelchair-dependent individuals with long-standing paraplegia. METHODS: The study included 319 patients. Lateral radiographs of the spine were collected from a database and analyzed to assess the global spinopelvic alignment (SPA). Magnetic resonance images of both shoulders were obtained to detect the presence of cuff tears. Patients were divided into 2 groups: Group RCT-I included all patients with cuff tears (right, left, or bilateral), whereas group RCT-II consisted exclusively of patients with bilateral cuff tears...
February 8, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29409630/spinal-kinematics-during-smartphone-texting-a-comparison-between-young-adults-with-and-without-chronic-neck-shoulder-pain
#4
Yan Fei Xie, Grace Szeto, Pascal Madeleine, Sharon Tsang
To advance our understanding about the association between smartphone use and chronic neck-shoulder pain, the objective of this study was to compare spinal kinematics between different text-entry methods in smartphone users with and without chronic neck-shoulder pain. Symptomatic (n = 19) and healthy participants (n = 18) were recruited and they performed three tasks: texting on a smartphone with one hand, with two hands, and typing on a desktop computer. Three-dimensional kinematics were examined in the cervical, thoracic and lumbar regions for each task...
April 2018: Applied Ergonomics
https://www.readbyqxmd.com/read/29402546/reconstruction-of-an-anterior-chest-wall-radionecrosis-defect-by-a-contralateral-latissimus-dorsi-flap-a-case-report
#5
A Vairinho, A Al Hindi, M Revol, A Legras, K Rem, Y Guenane, S Cristofari, T Sorin
INTRODUCTION: Soft tissue and bone radionecrosis are rare but serious complications may occur late after radiotherapy. CASE REPORT: We report the case of an 86-year-old woman with a history an infiltrating ductal carcinoma of the left breast, treated by total mastectomy, left axillary dissection and adjuvant radiotherapy. Eighteen years later, the first radionecrosis lesions appeared and grew progressively in a 6-month period. These lesions are deep, involving the anterior aspect of the 4th to the 6th ribs and infiltrating the chest wall to the left cardio-thoracic space communicating largely with the pericardium...
February 2, 2018: Annales de Chirurgie Plastique et Esthétique
https://www.readbyqxmd.com/read/29397630/-radiological-analysis-of-coronal-and-sagittal-spinopelvic-parameters-in-patients-with-degenerative-lumbar-kyphoscoliosis
#6
C J Liu, Z Q Zhu, S Duan, K F Wang, W W Xia, S Xu, H Y Liu
Objective: To review and compare radiological parameters between degenerative lumbar kyphoscoliosis (DLKS) and degenerative lumbar kyphosis (DLK), and analyze the relationships between coronal and sagittal deformities and compensatory mechanisms of sagittal balance. Methods: A total of 82 patients with lumbar degenerative deformities were enrolled for our radiographic study at Department of Spinal Surgery, Peking University People's Hospital from January 2016 to May 2017. These patients were divided into two groups: DLKS group (39 patients) with lumbar coronal and sagittal deformities, and DLK group (43 patients) just with lumbar sagittal deformity...
February 1, 2018: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
https://www.readbyqxmd.com/read/29395226/three-dimensional-primary-and-coupled-range-of-motions-and-movement-coordination-of-the-pelvis-lumbar-and-thoracic-spine-in-standing-posture-using-inertial-tracking-device
#7
M Narimani, N Arjmand
Evaluation of spinal range of motions (RoMs) and movement coordination between its segments (thorax, lumbar, and pelvis) has clinical and biomechanical implications. Previous studies have not recorded three-dimensional primary/coupled motions of all spinal segments simultaneously. Moreover, magnitude/direction of the coupled motions of the thorax/pelvis in standing posture and lumbopelvic rhythms in the frontal/transverse planes have not been investigated. This study, hence, used an inertial tracking device to measure T1, T5, T12, total (T1-T12) thoracic, lower (T5-T12) and upper (T1-T5) thoracic, lumbar (T12-S1), and pelvis primary and coupled RoMs as well as their movement coordination in all anatomical planes/directions in twenty-two healthy individuals...
January 25, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29382295/arthroscopic-percutaneous-inverted-mattress-suture-fixation-of-isolated-greater-tuberosity-fracture-of-humerus
#8
Suk-Hwan Jang, Han-Eui Song, Seung-Hyuk Choi
OBJECTIVE: The purpose of the study was to evaluate the clinical and radiographic outcomes of treatment in patients with isolated greater tuberosity (GT) fractures of humerus using arthroscopic percutaneous inverted mattress suture fixation technique. MATERIALS AND METHODS: We attempted to use the arthroscopic percutaneous inverted mattress suture fixation technique in 17 consecutive cases with isolated displaced GT fractures. Fourteen patients were successfully treated without switching to other methods and were available for follow-up at a mean of 22 months (range: 17-38 months) after surgery...
January 2018: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29368324/how-to-reduce-stress-on-the-pedicle-screws-in-thoracic-spine-importance-of-screw-trajectory-a-finite-element-analysis
#9
Yahya Güvenç, Göktuğ Akyoldaş, Salim Şentürk, Deniz Erbulut, Onur Yaman, Ali Fahir Özer
AIM: With wide application of the pedicle screw, clinical concerns have focused on accurate placement of the screws. Anatomic trajectory (AT) and straightforward trajectory (ST) are two popular techniques of pedicle screw insertion. Herein, we investigated the biomechanical comparison of thoracic transpedicular screw trajectories on the sagittal plane. To the best of our knowledge, this is the first comparative finite element analysis (FEA) on the different insertion trajectories of the pedicle screws in the thoracic spine...
December 25, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/29362689/ergonomic-risk-and-preventive-measures-of-musculoskeletal-disorders-in-the-dentistry-environment-an-umbrella-review
#10
Simone De Sio, Veronica Traversini, Francesca Rinaldo, Valerio Colasanti, Giuseppe Buomprisco, Roberto Perri, Federica Mormone, Giuseppe La Torre, Fabrizio Guerra
Introduction: Dental practitioners are exposed to different occupational hazards during the course of their professional activity, such as physical, chemical, biological, ergonomic factors. The ergonomic hazards, caused by strained posture and prolonged repetitive movements, can induce musculoskeletal disorders. It occurs in 54-93% of dental professionals and involve the spine, shoulder and hand-wrist tract. Through a systematic review of international literature, we analyzed specific ergonomic risk factors and preventive measures of musculoskeletal disorders in professional dental activity...
2018: PeerJ
https://www.readbyqxmd.com/read/29362342/-a-case-report-of-robotic-assisted-laparoscopic-low-anterior-resection-in-a-patient-with-rectal-cancer-and-polysplenia-syndrome
#11
Akinobu Furutani, Akio Shiomi, Yusuke Kinugasa, Tomohiro Yamaguchi, Hiroyasu Kagawa, Yushi Yamakawa, Shoichi Manabe, Yusuke Yamaoka, Yusuke Ogi, Yoshinobu Nagasawa, Hitoshi Hino, Shunichiro Kato, Takuya Suzuki, Kakeru Torii, Kohei Koido
Polysplenia syndrome is a rare congenital disease characterized by variable thoracic and abdominal anomalies. A man in his 70s was diagnosed with rectal cancer by close exploration for fecal occult blood. A barium enema revealed a type 1 rectal tumor andwith non-rotation of intestine. CT revealed multiple abnormalities: a polyspleen, preduodenal portal vein, congenital absence of the pancreatic tail, bilateral superior vena cava, andbilateral bilobedlung. Basedon these findings, the patient was diagnosedas having rectal cancer with polysplenia syndrome andtreatedwith robotic assistedlaparoscopic low anterior resection...
January 2018: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/29361243/emphysematous-and-nonemphysematous-gas-trapping-in-chronic-obstructive-pulmonary-disease-quantitative-ct-findings-and-pulmonary-function
#12
Mariaelena Occhipinti, Matteo Paoletti, Francesca Bigazzi, Gianna Camiciottoli, Riccardo Inchingolo, Anna Rita Larici, Massimo Pistolesi
Purpose To identify a prevalent computed tomography (CT) subtype in patients with chronic obstructive pulmonary disease (COPD) by separating emphysematous from nonemphysematous contributions to total gas trapping and to attempt to predict and grade the emphysematous gas trapping by using clinical and functional data. Materials and Methods Two-hundred and two consecutive eligible patients (159 men and 43 women; mean age, 70 years [age range, 41-85 years]) were prospectively studied. Pulmonary function and CT data were acquired by pulmonologists and radiologists...
January 23, 2018: Radiology
https://www.readbyqxmd.com/read/29360660/relationships-between-the-axial-derotation-of-the-lower-instrumented-vertebra-and-uninstrumented-lumbar-curve-correction-radiographic-outcome-in-lenke-1-adolescent-idiopathic-scoliosis-with-a-minimum-2-year-follow-up
#13
Saba Pasha, Patrick J Cahill, John M Flynn, Paul Sponseller, Peter O Newton
BACKGROUND: Preoperative spinal parameters are used to guide the fusion levels in adolescent idiopathic scoliosis (AIS) spinal surgery. However, the impact of the factors modifiable by the surgeon in varying levels of preoperative patient-specific variables is not fully explored. The goal of this study was to identify the association between axial rotation correction of the lower instrumented vertebra (LIV) and spontaneous correction of the uninstrumented lumbar spine as a function of preoperative 3 dimensional (3D) curve characteristics in Lenke 1 AIS...
January 22, 2018: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29339321/internal-thoracic-artery-to-middle-cerebral-artery-bypass-surgery-cadaveric-feasibility-study
#14
Stephen Monteith, Oded Goren, Ragu Sampath, Eric Lehr, Akshal Patel, Paul J Choi, Joe Iwanaga, Marios Loukas, R Shane Tubbs
BACKGROUND: A few options of extracranial donor vessels exist for utilization in intracranial vascular bypass procedures. To our knowledge, the use of an internal thoracic artery for cerebral revascularization has not been studied previously. Hence, this cadaveric feasibility study was performed. METHODS: The internal thoracic artery was dissected in five adult cadaveric specimens. The proximal diameter, distal diameter, and the length of the vessel were measured and recorded...
January 12, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29338846/comparison-of-two-trunk-electromagnetic-sensor-placement-methods-during-shoulder-motion-analysis
#15
Hillary A Plummer, Federico Pozzi, Lori A Michener
For kinematic studies of the shoulder, electromagnetic sensors are commonly placed on the humerus, scapula, and trunk. The trunk sensor is used to describe humeral and scapular kinematics with respect to the trunk. There are two common trunk sensor placements, the sternum or third thoracic vertebrae (T3). It is currently unclear if placement of the trunk sensor affects kinematics, making it difficult to compare data across studies. The purpose of this study was to compare two trunk sensor placements (T3 and sternum) on trunk and scapular kinematics during arm elevation...
December 24, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29299101/rib-head-dislocation-causing-spinal-canal-stenosis-in-a-child-with-neurofibromatosis-type-1
#16
Alan M Chen, Jeffrey B Neustadt, Jennifer Neville Kucera
A 10-year-old female with neurofibromatosis type 1 and severe dystrophic scoliosis presented with a two-month history of difficulty ambulating due to low back pain. The patient did not have any neurological symptoms. MRI of the thoracolumbar spine demonstrated subluxation of the right posterior tenth and eleventh ribs through their respective neural foramina, with mild mass effect on the thecal sac without abnormal cord signal or cord compression. Groups of neurofibromas were present along the right ribs and paravertebral soft tissues around these levels...
August 2017: Journal of Radiology Case Reports
https://www.readbyqxmd.com/read/29287812/the-true-ponte-osteotomy-by-the-one-who-developed-it
#17
Alberto Ponte, Giuseppe Orlando, Gian Luigi Siccardi
STUDY DESIGN: Technique and applications. OBJECTIVES: To define the anatomy, biomechanics, indications, and surgical technique of the true Ponte osteotomy. SUMMARY OF BACKGROUND DATA: The Ponte osteotomy, originally developed for thoracic kyphosis, was the first one to obtain posterior shortening of the thoracic spine, maintaining the anterior column load-sharing capacity. It has become a widely applied technique in various types of spine deformities and a frequent topic of presentations at meetings and in scientific articles...
January 2018: Spine Deformity
https://www.readbyqxmd.com/read/29287811/biomechanical-simulation-of-stresses-and-strains-exerted-on-the-spinal-cord-and-nerves-during-scoliosis-correction-maneuvers
#18
Juan Henao, Hubert Labelle, Pierre-Jean Arnoux, Carl-Éric Aubin
STUDY DESIGN: Biomechanical analysis of the spinal cord and nerves during scoliosis correction maneuvers through numerical simulations. OBJECTIVE: To assess the biomechanical effects of scoliosis correction maneuvers and stresses generated on the spinal nervous structures. BACKGROUND DATA: Important forces are applied during scoliosis correction surgery, which could potentially lead to neurologic complications due to stresses exerted on the nervous structures...
January 2018: Spine Deformity
https://www.readbyqxmd.com/read/29277028/are-we-simplifying-balance-evaluation-in-adolescent-idiopathic-scoliosis
#19
Saba Pasha, Keith Baldwin
BACKGROUND: Clinical evaluation of the postural balance in adolescent idiopathic scoliosis has been measured by sagittal vertical axis and frontal balance. The impact of the scoliotic deformity in three planes on balance has not been fully investigated. METHODS: 47 right thoracic and left lumbar curves adolescent idiopathic scoliosis and 10 non-scoliotic controls were registered prospectively. 13 spinopelvic postural parameters were calculated from the 3-dimantional reconstructions of X-rays...
November 29, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/29246473/coupled-motions-in-human-and-porcine-thoracic-and-lumbar-spines
#20
Idsart Kingma, Iris Busscher, Albert J van der Veen, Gijsbertus J Verkerke, Albert G Veldhuizen, Jasper Homminga, Jaap H van Dieën
Coupled motions, i.e., motions along axes other than the loaded axis, have been reported to occur in the human spine, and are likely to be influenced by inclined local axes due to the sagittal plane spine curvature. Furthermore, the role of facet joints in such motions is as yet unclear. Therefore, this study aimed at assessing coupled motions in multiple spine sections in vitro, before and after removal of posterior elements. Six elderly human and 6 young porcine spines were sectioned in four segments (high thoracic, mid thoracic, low thoracic and lumbar), each consisting of four vertebrae and three intervertebral discs...
December 6, 2017: Journal of Biomechanics
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