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https://www.readbyqxmd.com/read/27926673/guideline-for-c1-lateral-mass-and-c2-pedicle-screw-choices-in-children-younger-than-6-years
#1
Daoyang Fan, Ruipeng Song, Min Zhang, Ruimin Bai, Yue Li, Zhen Zhang, Han Wu, Yuqiang Wang, Liang Zhao, Wenfei Gao, Hui Dong, Wensheng Liao, Yilin Liu, Yi Zhang, Limin Wang, Weidong Wang
STUDY DESIGN: Prospective study. OBJECTIVE: To analyze the most feasible choice of C1 lateral mass (C1LM) and C2 pedicle (C2P) screw in upper cervical surgeries for children younger than 6 years. SUMMARY OF BACKGROUND DATA: The C1LM and C2P screw technique is a stable cervical vertebrae internal fixation method in upper cervical surgery. Some tomographic studies have indicated the feasibility of insertion of C1LM and C2P screws in children...
December 6, 2016: Spine
https://www.readbyqxmd.com/read/27926672/mechanisms-predisposing-factors-and-prognosis-of-intra-operative-vertebral-subluxation-during-pedicle-subtraction-osteotomy-in-surgical-correction-of-thoracolumbar-kyphosis-secondary-to-ankylosing-spondylitis
#2
Bang-Ping Qian, Sai-Hu Mao, Jun Jiang, Bin Wang, Yong Qiu
STUDY DESIGN: A retrospective study. OBJECTIVE: To analyze the mechanisms, predisposing factors and prognosis of the intraoperative vertebral subluxation (VS) during pedicle subtraction osteotomy (PSO) for thoracolumbar kyphosis secondary to ankylosing spondylitis (AS). SUMMARY OF BACKGROUND DATA: VS is one of the most daunting challenges that surgeons encounter during PSO closure, especially in AS patients with ankylosed and mostly osteoporotic spine...
December 6, 2016: Spine
https://www.readbyqxmd.com/read/27924499/pedicle-screw-fixation-with-kyphoplasty-decreases-the-fracture-risk-of-the-treated-and-adjacent-non-treated-vertebral-bodies-a-finite-element-analysis
#3
Pan Yang, Ying Zhang, Huan-Wen Ding, Jian Liu, Lin-Qiang Ye, Jin Xiao, Qiang Tu, Tao Yang, Fei Wang, Guo-Gang Sun
Adjacent vertebral fractures are common in patients with osteoporotic vertebral compression fractures (OVCFs) after kyphoplasty. This finite element study was to examine whether short segment pedicle screw fixation (PSF) with kyphoplasty may decrease the fracture risk of the treated and adjacent non-treated vertebrae after kyphoplasty for OVCFs. By simulating cement augmentation with or without short segment pedicle screw fixation (PSF), two tridimensional, anatomically detailed finite element models of the T10-L2 functional spinal junction were developed...
December 2016: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/27923375/the-surgical-strategy-for-eosinophilic-granuloma-of-the-pediatric-cervical-spine-complicated-with-neurologic-deficit-and-or-spinal-instability
#4
Nanzhe Zhong, Wei Xu, Tong Meng, Xinghai Yang, Wangjun Yan, Jianru Xiao
BACKGROUND: Various therapeutic approaches have been proposed for the treatment of pediatric patients with eosinophilic granuloma (EG) of the cervical spine. Our aim was to discuss and present our experience with the individualized surgical intervention of pediatric cervical EG complicated with neurologic deficits and/or spinal instability. METHODS: We retrospectively analyzed the clinical data of 19 children who were diagnosed with cervical EG comor spinal/or spinal instability (evaluated by the Spinal Instability Neoplastic Score, SINS ≥ 7) and treated surgically in our institution...
December 7, 2016: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/27922953/total-maxillary-reconstruction-with-a-bi-paddle-double-barrel-osteocutaneous-fibular-flap-and-arteriovenous-saphenous-loop-after-a-globe-sparing-total-maxillectomy-due-to-osteosarcoma
#5
Wan-Ling Tseng, Tzu-Yen Chang, Kuo-Shu Hung, Szu-Han Chen, Jenn-Ren Hsiao, Yao-Chou Lee
BACKGROUND: The titanium mesh or bone graft is usually used for orbital support after a globe-sparing total maxillectomy. However, its use can invite complications, such as infection, exposure, and absorption, especially for patients who require adjuvant radiotherapy. Here, the authors present a patient who received total maxillary reconstruction with an osteocutaneous fibular flap. METHODS: A 53-year-old man with the diagnosis of maxillary osteosarcoma received a globe-sparing total maxillectomy...
December 5, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27922578/facet-joint-violation-during-percutaneous-pedicle-screw-placement-a-comparison-of-two-techniques
#6
Oliver Tannous, Ehsan Jazini, Tristan B Weir, Kelley E Banagan, Eugene Y Koh, D Greg Anderson, Daniel E Gelb, Steven C Ludwig
STUDY DESIGN: A comparative study of facet joint violation (FJV) using two percutaneous surgical techniques. OBJECTIVE: To compare the rate of iatrogenic FJV and medial pedicle wall breach between two methods of percutaneous pedicle screw instrumentation in the thoracic and lumbar spine. SUMMARY OF BACKGROUND DATA: Variable iatrogenic damage to the facet joints has been reported to occur with percutaneous pedicle screw techniques, compared with the open approach, which has been associated with adjacent segment disease...
December 2, 2016: Spine
https://www.readbyqxmd.com/read/27922572/comparative-study-between-pedicle-subtraction-osteotomy-pso-and-closing-opening-wedge-osteotomy-fish-mouth-pso-for-sagittal-plane-deformity-correction
#7
Jong-Hwa Park, Seung-Jae Hyun, Ki-Jeong Kim, Tae-Ahn Jahng
STUDY DESIGN: A retrospective study. OBJECTIVE: To evaluate the safety and efficacy of closing-opening wedge osteotomy (COWO: fish-mouth pedicle subtraction osteotomy [PSO]), for sagittal plane deformity correction and to compare the radiographical outcomes for patients undergoing conventional- and fish-mouth PSO. SUMMARY OF BACKGROUND DATA: The COWO has been developed to achieve a large magnitude of correction at a single level for patients with severe fixed sagittal imbalance...
December 2, 2016: Spine
https://www.readbyqxmd.com/read/27921018/comparison-of-the-protective-effects-of-erythropoietin-and-melatonin-on-renal-ischemia-reperfusion-injury
#8
Shokofeh Banaei, Nasser Ahmadiasl, Alireza Alihemmati
BACKGROUND: Renal ischemia-reperfusion (IR) contributes to the development of acute renal failure (ARF). Oxygen free radicals are considered to be the principal components involved in the pathophysiological tissue alterations observed during renal IR. OBJECTIVES: In this study, we compared the effects of melatonin (MEL) and erythropoietin (EPO), both known antioxidant and anti-inflammatory agents, on IR-induced renal injury in rats. MATERIALS AND METHODS: Wistar albino rats were unilaterally nephrectomized and then subjected to 45 minutes of renal pedicle occlusion followed by 24 hours of reperfusion...
July 2016: Trauma Monthly
https://www.readbyqxmd.com/read/27919651/computer-assisted-skip-pedicle-screw-fixation-for-adolescent-idiopathic-scoliosis
#9
Masashi Uehara, Jun Takahashi, Shugo Kuraishi, Masayuki Shimizu, Shota Ikegami, Toshimasa Futatsugi, Hiroki Oba, Hiroyuki Kato
STUDY DESIGN: A retrospective single-center and single-surgeon study. OBJECTIVES: This study investigated the clinical and radiological results of skip pedicle screw fixation for adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA: At present, the generally used technique for pedicle screw fixation for the surgical correction of AIS entails inserting a pedicle screw into every segment on the corrective side and into every or every other segment on the supportive side...
December 2, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/27919616/supermicrosurgery-assisted-venous-supercharging-of-a-reverse-flow-angular-artery-perforator-flap-for-nasal-reconstruction
#10
R Vijayan, F Al-Aswad, R Y Kannan
The centre ground in the world of flaps have over time, gradually shifted from tubed pedicled, random-pattern, axial-pattern, pedicled, free and currently, to free-styled flaps. These concepts are broadly based on the angiosome-perforasome concept. In this case report, we illustrate how the concept of venosome capture can be transposed onto reverse-flow flaps with the aid of venous supercharging. Moreover, if this is seen from the free-styled flap perspective, it requires supermicrosurgical expertise. This case report hence, serves as a fusion of all the above concepts...
November 24, 2016: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/27918318/alternative-treatment-for-residual-aortobronchial-fistula-after-thoracic-endovascular-aortic-repair
#11
Kosuke Ujihira, Yoshihiko Kurimoto, Ryushi Maruyama, Yutaka Iba, Naritomo Nishioka, Akira Yamada, Katsuhiko Nakanishi, Hiroaki Kato, Masaru Abe, Yoshiaki Narita, Masayuki Osawa
A patient with an aortobronchial fistula secondary to a thoracic endovascular aortic repair was successfully treated with a re-thoracic endovascular aortic repair with debranching technique. Five months postoperatively, the aneurysm had shrunk; however, computed tomography revealed air in the thrombo-excluded aortic aneurysmal sac without signs of infection. Because of worsening air finding at the eighth month, we performed a resection of the residual fistula and wrapped the stent graft in a pedicled muscle flap...
December 1, 2016: Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery
https://www.readbyqxmd.com/read/27916869/error-analysis-and-experimental-study-of-a-bi-planar-parallel-mechanism-in-a-pedicle-screw-robot-system
#12
Qingjuan Duan, Zhijiang Du, Hongjian Yu, Yongfeng Wang, Wei Dong
Due to the urgent need for high precision surgical equipment for minimally invasive spinal surgery, a novel robot-assistant system was developed for the accurate placement of pedicle screws in lumbar spinal surgeries. The structure of the robot was based on a macro-micro mechanism, which includes a serial mechanism (macro part) and a bi-planar 5R parallel mechanism (micro part). The macro part was used to achieve a large workspace, while the micro part was used to obtain high stiffness and accuracy. Based on the transfer function of dimension errors, the factors affecting the accuracy of the end effectors were analyzed...
November 30, 2016: Sensors
https://www.readbyqxmd.com/read/27916685/finding-the-right-fit-studying-the-biomechanics-of-under-tapping-with-varied-thread-depth-and-pitch
#13
Ehsan Jazini, Carmen Petraglia, Mark Moldavsky, Oliver Tannous, Tristan Weir, Comron Saifi, Omar Elkassabany, Yiwei Cai, Brandon Bucklen, Joseph O'Brien, Steven C Ludwig
BACKGROUND CONTEXT: Compromise of pedicle screw purchase is a concern in maintaining rigid spinal fixation, especially with osteoporosis. Little consistency exists among various tapping techniques. Pedicle screws are often prepared with taps of a smaller diameter, which can further exacerbate inconsistency. PURPOSE: To determine whether a mismatch between tap thread depth (D) and pitch (P) and screw thread D and P affects fixation when under-tapping in osteoporotic bone...
December 1, 2016: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/27913719/surgical-site-infections-in-major-head-and-neck-surgeries-involving-pedicled-flap-reconstruction
#14
Neerav Goyal, Bharat B Yarlagadda, Daniel G Deschler, Kevin S Emerick, Derrick T Lin, Debbie L Rich, James W Rocco, Marlene L Durand
OBJECTIVE: To evaluate surgical site infections (SSI) after pedicled reconstruction in head and neck surgery. METHODS: Records of patients with pedicled flap reconstructions between 2009 and 2014 at Massachusetts Eye and Ear were reviewed. Onset of SSI or fistula ≤30 days postoperatively was noted. A free flap cohort was reviewed for comparison. RESULTS: Two hundred and eight pedicled reconstructions were performed for cancer (83%), osteoradionecrosis (7%), and other reasons (10%)...
January 2017: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/27912770/endometriosis-associated-clear-cell-carcinoma-arising-in-caesarean-section-scar-a-case-report-and-review-of-the-literature
#15
Gabriella Ferrandina, Eleonora Palluzzi, Francesco Fanfani, Stefano Gentileschi, Anna Lia Valentini, Maria Vittoria Mattoli, Ilaria Pennacchia, Giovanni Scambia, Gianfranco Zannoni
BACKGROUND: Malignant transformation has been reported in approximately 1% of the endometriosis cases; herein, we report a case of clear cell endometrial carcinoma arising from endometriosis foci located within a caesarean section scar. CASE PRESENTATION: In November 2014, a Caucasian, 44-year-old woman was transferred to our institution because of severe respiratory failure due to massive lung embolism and rapid enlargement of a subcutaneous suprapubic mass. Abdomino-pelvic magnetic resonance showed a 10...
December 3, 2016: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/27910172/imaging-diagnosis-imaging-and-histopathologic-characteristics-of-a-vertebral-hamartoma-in-a-cat
#16
Frances E Taylor-Brown, Christopher R Lamb, Henny Martineau, Clare Muir, Elsa Beltran
A 9-month-old domestic shorthair cat had progressive ambulatory paraparesis, proprioceptive ataxia, and thoracolumbar hyperesthesia. An extradural mass affecting the left pedicle and lamina of the second lumbar vertebra (L2) causing marked spinal cord impingement was identified in magnetic resonance (MR) images. The mass was predominantly calcified in computed tomographic (CT) images. A hemilaminectomy was performed to resect the mass. Clinical signs were greatly improved at 12-month follow-up. The histopathologic diagnosis was vascular hamartoma...
December 1, 2016: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/27909659/reliability-of-the-planned-pedicle-screw-trajectory-versus-the-actual-pedicle-screw-trajectory-using-intra-operative-3d-ct-and-image-guidance
#17
Catherine A Miller, Charles G Ledonio, Matthew A Hunt, Farhan Siddiq, David W Polly
BACKGROUND: Technological advances, including navigation, have been made to improve safety and accuracy of pedicle screw fixation. We evaluated the accuracy of the virtual screw placement (Stealth projection) compared to actual screw placement (intra-operative O-Arm) and examined for differences based on the distance from the reference frame. METHODS: A retrospective evaluation of prospectively collected data was conducted from January 2013 to September 2013. We evaluated thoracic and lumbosacral pedicle screws placed using intraoperative O-arm and Stealth navigation by obtaining virtual screw projections and intraoperative O-arm images after screw placement...
2016: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/27909652/percutaneous-transpedicular-lumbar-endoscopy-a-case-report
#18
Priyank Uniyal, Gun Choi, Bhushan Khedkkar
INTRODUCTION: Since Kambin introduced the concept of percutaneous transforaminal disc surgery in 1973, there has been numerous advances in the field of spine endoscopy and the concept of central debulking of the disc has changed to targeted fragmentectomy and disc preservation. The lumbar disc fragments which are down migrated and to the medial aspect of the pedicle are extremely challenging to deal by transforaminal approach even after foraminoplasties and by various other approaches...
2016: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/27908615/unilaterally-posterior-lumbar-interbody-fusion-with-double-expandable-peek-cages-without-pedicle-screw-support-for-lumbar-disc-herniation
#19
Aydemir Kale, Ibrahim Ilker Oz, Ayhan Onk, Murat Kalaycı, Çağatay Büyükuysal
OBJECTIVES: Posterior lumbar interbody fusion (PLIF) is usually bilateral procedure, and it is combined with posterior by bilateral pedicle screw support or with fixation. The purpose of this retrospective study was to compare the surgical outcomes of simple discectomy and PLIF without pedicle screw support in patients with lumbar disc herniation (LDH). PATIENTS AND METHODS: 60 patients with single segment LDH were operated between February 2010 and June 2013. 40 patients were treated with simple discectomy (Group 1) and 20 patients were treated with PLIF using double expandable polyetheretherketone (PEEK) cages without instrumentation (Group 2) unilaterally...
November 17, 2016: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/27906938/technical-strategies-and-anatomic-considerations-for-an-extrapedicular-modified-inferior-endplate-access-to-thoracic-and-lumbar-vertebral-bodies
#20
Douglas P Beall, Blake Parsons, Scott Burner
BACKGROUND: Percutaneous access to the vertebral bodies is commonly done via the transpedicular approach for both diagnoses and treatment of spinal pathology. While this approach is effective in most cases, it is difficult in certain situations such as a patient with obstructing hardware from prior surgery. OBJECTIVES: To investigate and illustrate an alternative to the typical percutaneous access to the vertebral body via an extrapedicular approach and to determine the complications associated with this approach...
November 2016: Pain Physician
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