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Ring fixator

Xiaodong Tang, Rongli Yang, Huayi Qu, Zhenyu Cai, Wei Guo
STUDY DESIGN: We retrospectively analyzed factors associated with spinopelvic mechanical failure after total sacrectomy. OBJECTIVE: To find the rate and type of mechanical fixation failure after total sacrectomy and to identify the associated risk factors. SUMMARY OF BACKGROUND DATA: Although rigid fixation has been achieved, mechanical failure is sometimes encountered in reconstruction after total sacrectomy. The incidence and factors associated with spinopelvic fixation mechanical failure after total sacrectomy are still not clear...
March 13, 2018: Spine
Ron N Alkalay, Robert Adamson, Michael W Groff
BACKGROUND CONTEXT: In the lumbar spine, end plate preparation for the interbody fusion cages may critically affect the cage's long term performance. This study investigated the effect of the interbody cage design on the compliance and cage subsidence of instrumented spines under cyclic compression. PURPOSE: To quantify the role of cage geometry and bone density on the stability of the spinal construct in response to cyclic compressive loads. STUDY DESIGN: Changes in the cage-bone interface and the effect of bone density on these changes were evaluated in a human cadaveric model for three intervertebral cage designs...
March 8, 2018: Spine Journal: Official Journal of the North American Spine Society
Michael A Bohl, Randy J Hlubek, U Kumar Kakarla, Steve W Chang
BACKGROUND: A major drawback to the use of cortical bone trajectory pedicle screws (CBTPS) with traditional posterior lumbar interbody fusion (PLIF) and transforaminal lumbar interbody fusion (TLIF) grafts is that traditional graft insertion trajectories require a wider posterior exposure. This wider exposure, beyond the limits otherwise required for CBTPS placement, negates a primary benefit of CBTPS fixation. OBJECTIVE: To define an alternative surgical technique for interbody graft placement that, when used in conjunction with CBTPS fixation, permits both minimal soft tissue dissection and optimal graft placement...
February 17, 2018: World Neurosurgery
D G Mostafa, M I Qavi, M M Bari, M Arifuzzaman, M Kamruzzaman, M K Saha
High-energy tibial plateau fractures associated with severe soft tissue injury are difficult to manage. The risk of wound complications following open reduction and internal fixation is notably high owing to extensive soft tissue dissection. Alternatively, application of Ilizarov ring fixator minimizes soft tissue dissection and provides adequate fracture stabilization to allow early range of motion and correction of any mal-alignment. With this technique, soft tissue complications particularly surgical site infections are expected to be significantly reduced...
January 2018: Mymensingh Medical Journal: MMJ
Denise Visco
Purpose: To evaluate the effect of intracameral phenylephrine/ketorolac (1%/0.3%) during cataract surgery on the use of iris fixation ring and surgical time in patients with poor pupil dilation (≤5.0 mm) or intraoperative floppy iris syndrome (IFIS). Setting: Private practice outpatient surgical center. Design: This retrospective analysis was conducted from January 1, 2014 to October 7, 2015. Materials and methods: The use of iris fixation rings was evaluated in a retrospective analysis of 46 patients who underwent cataract surgery from January 1, 2014, to October 7, 2015, and who were identified before surgery to be at risk for intraoperative miosis...
2018: Clinical Ophthalmology
T Ohmori, T Kitamura, T Nishida, T Matsumoto, T Tokioka
AIM: There is not adequate evidence to establish whether external fixation (EF) of pelvic fractures leads to a reduced mortality. We used the Japan Trauma Data Bank database to identify isolated unstable pelvic ring fractures to exclude the possibility of blood loss from other injuries, and analyzed the effectiveness of EF on mortality in this group of patients. PATIENTS AND METHODS: This was a registry-based comparison of 1163 patients who had been treated for an isolated unstable pelvic ring fracture with (386 patients) or without (777 patients) EF...
February 2018: Bone & Joint Journal
Germano Gallicchio, Andrew Cooke, Christopher Ring
Eye-tracking research has revealed that, compared to novices, experts make longer ocular fixations on the target of an action when performing motor skills; that is, they have a longer quiet eye. Remarkably, the reason why a longer quiet eye aids movement has yet to be established. There is a need for interdisciplinary research and new measures to accelerate progress on the mechanistic understanding of the phenomenon. With the aim to provide researchers with new tools, we assessed the utility of electrooculography (EOG) to examine ocular activity while 10 experts and 10 novices putted golf balls...
February 9, 2018: Psychophysiology
Chun-Hui Tang, Gao-Wen Yao, Lin Wang, Hong-Liang Tu, Wei Luo
OBJECTIVE: To evaluate the feasibility of minimally invasive internal fixation of pelvic anterior and posterior ring for the treatment of type C pelvic fracture, and to explore its operative techniques and therapeutic efficacy. METHODS: From December 2010 to December 2015, 18 patients with type C pelvic fracture were treated by reconstructive plates fixation through minimally invasive ilioinguinal approach for pelvic anterior ring injuries, and by invasive percutaneous sacroiliac joint screw fixation for pelvic posterior ring injuries...
July 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Mariam Lami, Harsimrat Singh, James H Dilley, Hajra Ashraf, Matthew Edmondon, Felipe Orihuela-Espina, Jonathan Hoare, Ara Darzi, Mikael H Sodergren
BACKGROUND:  The adenoma detection rate (ADR) is an important quality indicator in colonoscopy. The aim of this study was to evaluate the changes in visual gaze patterns (VGPs) with increasing polyp detection rate (PDR), a surrogate marker of ADR. METHODS:  18 endoscopists participated in the study. VGPs were measured using eye-tracking technology during the withdrawal phase of colonoscopy. VGPs were characterized using two analyses - screen and anatomy. Eye-tracking parameters were used to characterize performance, which was further substantiated using hidden Markov model (HMM) analysis...
February 7, 2018: Endoscopy
Narjes Jafari, Karl Golnik, Mansoor Shahriari, Parvaneh Karimzadeh, Sayena Jabbehdari
Purpose: We aimed to present the ophthalmic manifestations of neuro-metabolic disorders. Methods: Patients who were diagnosed with neuro-metabolic disorders in the Neurology Department of Mofid Pediatric Hospital in Tehran, Iran, between 2004 and 2014 were included in this study. Disorders were confirmed using clinical findings, neuroimaging, laboratory data, and genomic analyses. All enrolled patients were assessed for ophthalmological abnormalities. Results: A total of 213 patients with 34 different neuro-metabolic disorders were included...
January 2018: Journal of Ophthalmic & Vision Research
John S Hwang, Mark C Reilly, Mohammad K Shaath, Stuart Changoor, Jonathan Eastman, Milton Lee Chip Routt, Michael S Sirkin, Mark R Adams
OBJECTIVE: To quantify the osseous anatomy of the dysmorphic third sacral segment and assess its ability to accommodate internal fixation DESIGN:: Retrospective chart review of a trauma database SETTING:: University Level 1 Trauma Center PATIENTS:: Fifty-nine patients over the age of 18 with computed tomography (CT) scans of the pelvis separated into two groups: a group with normal pelvic anatomy and a group with sacral dysmorphism. MAIN OUTCOME MEASUREMENTS: The sacral osseous area was measured on CT scans in the axial, coronal, and sagittal planes in normal and dysmorphic pelves...
January 26, 2018: Journal of Orthopaedic Trauma
Theerayot Kobasa, Eldin Talundzic, Rungniran Sug-Aram, Patcharida Boondat, Ira F Goldman, Naomi W Lucchi, Pratin Dharmarak, David Sintasath, Mark Fukuda, Toni Whistler, John MacArthur, Venkatachalam Udhayakumar, Preecha Prempree, Nipon Chinanonwait
Artemisinin-based combination therapy (ACT) is the most effective and widely used treatment for uncomplicated Plasmodium falciparum (Pf ) malaria and is a cornerstone for malaria control and prevention globally. Resistance to artemisinin derivatives has been confirmed in the Greater Mekong Subregion (GMS), which manifest as slow parasite clearance in patients and reduced ring-stage susceptibility to artemisinins in survival assays. The Pf kelch 13 gene mutations associated with artemisinin resistant parasites are now wide-spread in the GMS...
January 29, 2018: Antimicrobial Agents and Chemotherapy
Rachelle M Metz, J Gary Bledsoe, Berton R Moed
OBJECTIVE: Recent clinical study suggests an advantage to adding an iliosacral screw to the anterior fixation construct for anteroposterior compression type-2 (OTA/AO type 61-B1), partially unstable open-book pelvic ring injuries. Others have described stress examination to determine any required supplemental fixation. However, biomechanical studies investigating iliosacral fixation requirements for this injury are lacking. Our objective was to determine whether adding an iliosacral screw to symphyseal plate fixation decreases displacement in a well-defined open-book pelvic ring injury model...
February 2018: Journal of Orthopaedic Trauma
Da-Wei Bi, Gang Zu, Lei Han, Yi-Min Chen, Hai-Tao Ma, Gang-Feng Hu, Yuan Zhu
OBJECTIVE: To discuss the suitable surgical approach and the internal fixation of unstable pelvic pelvic fractures. METHODS: From May 2010 to May 2015, 45 patients with unstable pelvic fractures were treated with different approaches and fixations, including 38 males and 7 females with an average age of 45 years ranging from 21 to 61 years. The course was within 2 weeks. According to Young-Burg classification, 23 patients were lateral compression injuries, 6 patients were vertical shearing injuries, 16 patients were anterior-posterior compression injuries...
March 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Qi-Fei Xu, Kui-Ran Lin, Dai-Jie Zhao, Song-Qin Zhang, Sheng-Kai Feng, Chen Li
OBJECTIVE: To investigate the application and effect of minimally invasive percutaneous anterior pelvic pubic ramus screw fixation in Tile B fractures. METHODS: A retrospective review was conducted on 56 patients with posterior pelvic ring injury combined with fractures of anterior pubic and ischiadic ramus treated between May 2010 and August 2015, including 31 males and 25 females with an average age of 36.8 years old ranging from 35 to 65 years old. Based on the Tile classification, there were 13 cases of Tile B1 type, 28 cases of Tile B2 type and 15 cases of Tile B3 type...
March 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Nicolas Cassar, Weiyi Tang, Hans Gabathuler, Kuan Huang
Because of the difficulty in resolving the large variability of N2 fixation with current methods which rely on discrete sampling, the development of new methods for high resolution measurements is highly desirable. We present a new method for high-frequency measurements of aquatic N2 fixation by continuous flow-through incubations and spectral monitoring of the acetylene (C2H2, a substrate analog for N2) reduction to ethylene (C2H4). In this method, named "Flow-through incubation Acetylene Reduction Assays by Cavity ring-down laser Absorption Spectros-copy" (FARACAS), dissolved C2H2 is continuously admixed with seawater upstream of a continuous-flow stirred-tank reactor (CFSR) in which C2H2 reduction takes place...
January 17, 2018: Analytical Chemistry
Kentaro Futamura, Tomonori Baba, Atsuhiko Mogami, Akio Kanda, Osamu Obayashi, Hideaki Iwase, Kazuo Kaneko
PURPOSE: Spinopelvic fixation and triangular osteosynthesis give firm internal fixation for unstable pelvic ring injuries (UPRI), but with sacrifice of mobility of the lumbar spine. Here, we describe the procedure and outcomes of a new approach, which we refer to as "within ring"-based sacroiliac rod fixation (SIRF). METHODS: The patient was placed in a prone position and longitudinal skin incisions were made at the medial margins of the bilateral posterior superior iliac spines (PSIS)...
January 10, 2018: International Orthopaedics
Todd Jaeblon, Kevin J Perry, Joseph A Kufera
OBJECTIVES: To determine if a novel surrogate of waist hip ratio (WHR) is more predictive of wound complications following pelvis or acetabulum stabilization than BMI, and describe the method of measuring a WHR proxy (WHRp). DESIGN: Retrospective review. SETTING: One Level-1 Trauma Center PATIENTS:: 161 patients following operative repair of pelvis and acetabulum fractures. INTERVENTION: Operative stabilization of a pelvic ring injury or acetabular fracture MAIN OUTCOME MEASUREMENTS:: Infection (pin, superficial, deep), Wound healing complication METHODS:: We retrospectively reviewed 161 subjects following operative repair of pelvic and acetabular fractures...
January 8, 2018: Journal of Orthopaedic Trauma
An Yan, Hai-Bo Mei, Kun Liu, Jiang-Yan Wu, Jin Tang, Guang-Hui Zhu, Wei-Hua Ye
OBJECTIVE: Treatment of congenital pseudarthrosis of the tibia (CPT) remains a challenge. The autogenic iliac bone graft is important consistent of treatment for CPT. The purpose of this study was to investigate the role of wrapping autogenic iliac bone graft in improvement of the curing opportunities of CPT. METHODS: We combined Ilizarov fixator with intramedullary rodding of the tibia and wrapping autogenic iliac bone graft for treatment 51 cases of CPT between 2007 and 2010...
December 2017: Medicine (Baltimore)
Yuebin Zhou, Honggang Guo, Zhiwei Cai, Yuan Zhang
RATIONALE: Complex pelvic ring fracture associated with floating knee is comparatively rare which usually results from high-energy trauma including vehicle-related accidence, falls from height, and earthquake-related injury. To our knowledge, few literatures have documented such injuries in the individual patient. Management of both injuries present challenges for surgical management and postoperative care. The purpose of this study is to prove the feasibility and benefits of damage control orthopedics (DCO)...
December 2017: Medicine (Baltimore)
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