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Ring fixator

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https://www.readbyqxmd.com/read/29143694/cryo-scanning-electron-microscopy-sem-and-scanning-transmission-electron-microscopy-stem-in-sem-for-bio-and-organo-mineral-interface-characterization-in-the-environment
#1
Guillaume Wille, Jennifer Hellal, Patrick Ollivier, Annie Richard, Agnes Burel, Louis Jolly, Marc Crampon, Caroline Michel
Understanding biofilm interactions with surrounding substratum and pollutants/particles can benefit from the application of existing microscopy tools. Using the example of biofilm interactions with zero-valent iron nanoparticles (nZVI), this study aims to apply various approaches in biofilm preparation and labeling for fluorescent or electron microscopy and energy dispersive X-ray spectrometry (EDS) microanalysis for accurate observations. According to the targeted microscopy method, biofilms were sampled as flocs or attached biofilm, submitted to labeling using 4',6-diamidino-2-phenylindol, lectins PNA and ConA coupled to fluorescent dye or gold nanoparticles, and prepared for observation (fixation, cross-section, freezing, ultramicrotomy)...
November 16, 2017: Microscopy and Microanalysis
https://www.readbyqxmd.com/read/29130653/-advances-in-diagnosis-and-treatment-of-posterior-distal-injury-of-pelvic-fracture
#2
REVIEW
Zhen Tan, Guang-Lin Wang
Pelvic fracture is one of the common diseases of traumatic orthopedics. With the increase of accidents such as traffic accidents,high craters and crush injuries in China,the incidence of pelvic fractures is also increasing year by year. Since pelvic bones and the ligament structure are close to neurovascular,cavity organs and the urogenital structure,early diagnosis and treatment of pelvic fractures is essential for preventing early complications and late sequelae. The treatment of pelvic ring injury has been the focus of pelvic fracture treatment,which determines the outcome of treatment...
September 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/29124339/accuracy-of-screw-fixation-using-the-o-arm-%C3%A2-and-stealthstation-%C3%A2-navigation-system-for-unstable-pelvic-ring-fractures
#3
Jun Takeba, Kensuke Umakoshi, Satoshi Kikuchi, Hironori Matsumoto, Suguru Annen, Naoki Moriyama, Yuki Nakabayashi, Norio Sato, Mayuki Aibiki
PURPOSE: Screw fixation for unstable pelvic ring fractures is generally performed using the C-arm. However, some studies reported erroneous piercing with screws, nerve injuries, and vessel injuries. Recent studies have reported the efficacy of screw fixations using navigation systems. The purpose of this retrospective study was to investigate the accuracy of screw fixation using the O-arm(®) imaging system and StealthStation(®) navigation system for unstable pelvic ring fractures. METHODS: The participants were 10 patients with unstable pelvic ring fractures, who underwent screw fixations using the O-arm StealthStation navigation system (nine cases with iliosacral screw and one case with lateral compression screw)...
November 9, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29117821/assessment-of-usefulness-of-anthropometric-data-for-predicting-the-scaphoid-and-the-screw-length-a-new-technique
#4
Darshan Kumar A Jain, Naresh Shetty, L Naveen Kumar, D C Sundaresh
BACKGROUND: Headless screw is frequently used for scaphoid fracture fixation. Aim of the study was to assess the correlation between the axial length of the scaphoid and the axial length of the middle phalanx of index, middle, ring and little finger so as to provide an indirect method to assess the length of the scaphoid and thereby the length of the screw. METHODS: Thirty five fresh frozen cadavers with seventy wrists and hands were dissected. The age, sex and side were recorded...
December 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/29106756/biomechanical-investigation-of-four-different-fixation-techniques-in-sacrum-denis-type-ii-fracture-with-low-bone-mineral-density
#5
Yves P Acklin, Ivan Zderic, R Geoff Richards, Paul Schmitz, Boyko Gueorguiev, Stephan Grechenig
With increasing life expectancy, fragility fractures of the pelvic ring are seen more frequently. Although their osteosynthesis can be very challenging, specific biomechanical studies for investigation of the fixation stability are still lacking. The aim of this study was to biomechanically evaluate four different fixation methods for sacrum Denis type II fractures in osteoporotic bone. Unstable Denis type II vertical sacrum fractures were created in 16 human pelves. Their osteosynthesis was performed with one sacro-iliac screw, posterior sacral plating, triangular fixation, or spino-pelvic fixation...
November 6, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29103207/complex-tibial-fractures-are-associated-with-lower-social-classes-and-predict-early-exit-from-employment-and-worse-patient-reported-qol-a-prospective-observational-study-of-46-complex-tibial-fractures-treated-with-a-ring-fixator
#6
Rasmus Elsoe, Peter Larsen, Juozas Petruskevicius, Søren Kold
The long-term outcomes following complex fractures of the tibia are reported to carry a risk of knee pain, malalignment, articular injury and post-traumatic osteoarthritis. The main objective of this study was to account for the patient-reported quality of life (QOL) 12 months after ring fixator removal in patients with a complex tibial fracture. Secondary objectives included a review of the socio-economic characteristics of the patient group and the rate of return to work in the study period. A prospective follow-up study was conducted of 60 patients with complex fractures of the tibia treated with ring external fixation...
November 4, 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/29099498/clinical-spectrum-and-surgical-outcomes-in-spherophakia-a-prospective-interventional-study
#7
S Khokhar, G Pillay, S Sen, E Agarwal
PurposeTo study the varied clinical presentations of patients with spherophakia, their management using surgical methods, and the clinical outcomes.Patients and methodsA prospective interventional study of 13 patients of spherophakia who presented to us from January 2014 and were followed up over the course of their treatment, and the data were documented for analysis.ResultsIn all, 26 eyes of 13 patients were reviewed and the median age of presentation was 12±12.05 years. All patients had a bilateral presentation with 22 eyes having lenticular myopia with a mean refractive error of -11...
November 3, 2017: Eye
https://www.readbyqxmd.com/read/29095714/current-trends-in-the-management-of-hemodynamically-unstable-pelvic-ring-injuries
#8
Philip F Stahel, Clay C Burlew, Ernest E Moore
PURPOSE OF REVIEW: Complex traumatic pelvic ring disruptions are associated with a high mortality rate due to associated retroperitoneal hemorrhage, traumatic-hemorrhagic shock, and postinjury coagulopathy. The present review provides an update on current management strategies to improve survival rates form hemodynamically unstable pelvic ring injuries. RECENT FINDINGS: Recently published international consensus guidelines have attempted to standardize the classification of hemodynamically unstable pelvic ring injuries and provided classification-based management algorithms for acute resuscitation and pelvic ring stabilization...
December 2017: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/29092114/remodeling-mitral-annuloplasty-ring-concept-with-preserved-dynamics-of-annular-height
#9
Søren N Skov, Diana M Røpcke, Marcell J Tjørnild, Christine Ilkjær, Jonas Rasmussen, Hans Nygaard, J M Hasenkam, Morten O Jensen, Sten L Nielsen
BACKGROUND: The configuration of the native annulus changes from nearly flat in the diastolic phase to saddle-shaped in the systolic phase. The present study was conducted to test a novel remodeling annuloplasty ring with built-in septal-lateral fixation and commissural axial flexibility so as to maintain the change in annular saddle shape. The study aim was to evaluate the in-vivo biomechanical performance of the novel annuloplasty ring, compared with the native valve and a semi-rigid and rigid annuloplasty ring...
May 2017: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/29078752/efficient-preparation-of-arabidopsis-pollen-tubes-for-ultrastructural-analysis-using-chemical-and-cryo-fixation
#10
Tohnyui Ndinyanka Fabrice, Andres Kaech, Gery Barmettler, Christof Eichenberger, J Paul Knox, Ueli Grossniklaus, Christoph Ringli
BACKGROUND: The pollen tube (PT) serves as a model system for investigating plant cell growth and morphogenesis. Ultrastructural studies are indispensable to complement data from physiological and genetic analyses, yet an effective method is lacking for PTs of the model plant Arabidopsis thaliana. METHODS: Here, we present reliable approaches for ultrastructural studies of Arabidopsis PTs, as well as an efficient technique for immunogold detection of cell wall epitopes...
October 27, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29078224/-spontaneous-iol-dislocation-what-can-we-do-for-prevention
#11
Joern Kuchenbecker
IOL dislocation and opacification represent further complications of modern IOL (intraocular lenses) implantation. Currently, an increase of IOL dislocation due to various reasons is observed. Due to capsular bag shrinkage, especially in patients with pseudoexfoliation (PEX) and other ocular condition, there is an increasing tension of the weakened zonula. The only use of capsular tension ring (CRT) is not sufficient. The shrinkage of the capsular bag and increasing tension of the zonula may be reduced by additional anterior capsule incisions...
October 27, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/29077625/chronic-and-intermittent-angle-closure-caused-by-in-the-bag-capsular-tension-ring-and-intraocular-lens-dislocation-in-patients-with-pseudoexfoliation-syndrome
#12
Frank Bochmann, Jörg Strümer
PURPOSE: A subluxation or dislocation of the intraocular lens (IOL) is a well-known complication after cataract surgery in patients with pseudoexfoliation syndrome (PEX). Capsular tension rings (CTR) are frequently used to prevent postoperative complications caused by zonular weakness. Here we present a series of 7 cases, 2 with intermittent and 5 with acute angle closure caused by a combination of PEX-associated zonular weakness and a resulting unstable capsular bag-CTR-IOL complex. MATERIALS AND METHODS: We describe the typical clinical course with elevated intraocular pressure, myopic shift, and shallowing of the anterior chamber in 7 patients with a new type of secondary angle closure...
November 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/29075017/assessment-of-a-novel-pinhole-supplementary-implant-for-sulcus-fixation-in-pseudophakic-cadaver-eyes
#13
K T Tsaousis, L Werner, C L C Trindade, J Guan, J Li, N Reiter
PurposeTo evaluate a novel small-aperture supplementary implant that applies the principle of pinholes for management of irregular astigmatism, in postmortem human eyes.MethodsPseudophakic human cadaver eyes were imaged by anterior segment optical coherence tomography (AS-OCT) to assess position of the in-the-bag intraocular lens (IOL). Eyes were prepared as per the Miyake-Apple technique. Two versions of the supplementary implant (open-loop and tripod designs) were then inserted into the sulcus of each eye...
October 27, 2017: Eye
https://www.readbyqxmd.com/read/29067950/percutaneous-sacroiliac-screw-placement-a-prospective-randomized-comparison-of-robot-assisted-navigation-procedures-with-a-conventional-technique
#14
Jun-Qiang Wang, Yu Wang, Yun Feng, Wei Han, Yong-Gang Su, Wen-Yong Liu, Wei-Jun Zhang, Xin-Bao Wu, Man-Yi Wang, Yu-Bo Fan
BACKGROUND: Sacroiliac (SI) screw fixation is a demanding technique, with a high rate of screw malposition due to the complex pelvic anatomy. TiRobot™ is an orthopedic surgery robot which can be used for SI screw fixation. This study aimed to evaluate the accuracy of robot-assisted placement of SI screws compared with a freehand technique. METHODS: Thirty patients requiring posterior pelvic ring stabilization were randomized to receive freehand or robot-assisted SI screw fixation, between January 2016 and June 2016 at Beijing Jishuitan Hospital...
November 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/29067533/double-flanged-haptic-and-capsular-tension-ring-or-segment-for-sutureless-fixation-in-zonular-instability
#15
Sergio Canabrava, Leticia Bernardino, Thais Batisteli, Gabriella Lopes, Alberto Diniz-Filho
PURPOSE: This paper introduces a surgical technique for the sutureless management of zonular dialysis greater than 120° using a capsular tension segment (CTS) or a modified capsular tension ring (m-CTR; CTR with suturing eyelets) and a haptic removed from a 3-piece polypropylene IOL. METHODS: A CTR is used as normal. Cataract removal is followed by connection of the CTS or m-CTR to the single haptic and created using heat to make a flange in one haptic's extremity...
October 24, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29065665/numerical-investigation-on-the-biomechanical-performance-of-laparoscopic-assisted-plate-used-for-fixing-pelvic-anterior-ring-fracture
#16
Yiqian He, Yongtao Lu, Baosheng Yin, Li Yu
Because of the minimal soft tissue injury, the laparoscopic-assisted internal fixation is a promising technique in fixing the pelvic anterior ring fracture. The aim of this study was to investigate the biomechanical performance of the laparoscopic-assisted plate by the finite element method. Four kinds of implants were investigated, that is, the laparoscopic-assisted plate (LAP), the percutaneous anterior pelvic bridge (PAPB), the transramus intraosseous screw (TIS), and the open reduction (OR). The stability of the implants was investigated under three loading cases, showing that when the LAP was used, the stress at the fracture site was smaller than that at other parts, while for other implants, the high stress was always around the fracture site...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29062151/a-new-species-of-the-rare-genus-anguillonema-fuchs-1938-nematoda-hexatylina-sphaerularioidea-with-its-molecular-phylogenetic-study
#17
Mahyar Mobasseri, Majid Pedram, Ebrahim Pourjam
Anguillonema amolensis n. sp. is described and illustrated based on its morphological, morphometric, and molecular characters. The new species is characterized by its 575 to 820 μm long and wide body (body width at vulva = 30 to 59 μm), irregularly ventrally curved after fixation, five to six lines in lateral fields, 6.0 to 7.5 μm long stylet with small rounded knobs, pharynx lacking a median bulb, pharyngo-intestinal junction anterior to nerve ring and excretory pore, females with monodelphic-prodelphic reproductive system, 15 to 19 μm long conical tail with broad rounded tip, and males absent...
September 2017: Journal of Nematology
https://www.readbyqxmd.com/read/29060811/identifying-the-effects-of-microsaccades-in-tripolar-eeg-signals
#18
Rachel Bellisle, Preston Steele, Rachel Bartels, Lei Ding, Sridhar Sunderam, Walter Besio
Microsaccades are tiny, involuntary eye movements that occur during fixation, and they are necessary to human sight to maintain a sharp image and correct the effects of other fixational movements. Researchers have theorized and studied the effects of microsaccades on electroencephalography (EEG) signals to understand and eliminate the unwanted artifacts from EEG. The tripolar concentric ring electrode (TCRE) sensors are used to acquire TCRE EEG (tEEG). The tEEG detects extremely focal signals from directly below the TCRE sensor...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29059105/recent-advances-in-small-pupil-cataract-surgery
#19
Boris E Malyugin
PURPOSE OF REVIEW: To highlight the existing and emerging cataract surgery trends in patients with insufficient mydriasis. Discuss the latest pharmacological approaches for pre and intraoperative pupil dilatation. Present the variety of newest pupil expansion devices; critically review their advantages and possible limitations to be considered by the surgeon. RECENT FINDINGS: The intracameral use of various mydriatic combinations augmenting the preoperative mydriatic instillations is currently gaining popularity in cataract surgery...
October 20, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/29055495/cemented-k-wire-fixation-for-the-treatment-of-shaft-fractures-of-middle-phalanges
#20
Xu Zhang, Xinzhong Shao, Zheming Zhang, Guisheng Zhang, Yadong Yu, Li Wang, Li Lyu
BACKGROUND: The objective of this report is to introduce an external-fixation technique using the combination of K-wires and cement. METHODS: From February 2009 to January 2015, 51 patients with shaft fractures of middle phalanges were treated with cemented K-wire fixation. The mean age of patients at surgery was 41 years. The mean time interval from injury to operation was 6±5.78days. Injured digits included index (n=18), long (n=15), ring (n=7), and little (n=11) fingers...
October 9, 2017: Injury
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