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https://www.readbyqxmd.com/read/28050537/spinopelvic-balance-evaluation-of-patients-with-degenerative-spondylolisthesis-l4l5-and-l4l5-herniated-disc-who-underwent-surgery
#1
Viviane Regina Hernandez Nunes, Charbel Jacob, Igor Machado Cardoso, José Lucas Batista, Marcus Alexandre Novo Brazolino, Thiago Cardoso Maia
OBJECTIVE: To correlate spinopelvic balance with the development of degenerative spondylolisthesis and disk herniation. METHODS: This was a descriptive retrospective study that evaluated 60 patients in this hospital, 30 patients with degenerative spondylolisthesis at the L4-L5 level and 30 with herniated disk at the L4-L5 level, all of whom underwent Surgical treatment. RESULTS: Patients with lumbar disk herniation at L4-L5 level had a mean tilt of 8...
November 2016: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28046494/su-c-209-07-phantoms-for-digital-breast-tomosynthesis-imaging-system-evaluation
#2
D Jacobson, Y Liu
PURPOSE: Digital Breast Tomosynthesis (DBT) is gaining importance in breast imaging. There is a need for phantoms that can be used for image evaluation and comparison. Existing commercially available phantoms for DBT are expensive and may lack clinically relevant test objects. The purpose of this study is to develop phantoms for DBT evaluation. METHODS: Four phantoms have been designed and constructed to assess the image quality (IQ) of two DBT systems. The first contains a spiral of 0...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28003787/pseudoduplication-of-the-optic-disc-in-moderate-myopia
#3
Zeynep Eylül Ercan, Aylin Karalezli, Gokcen Coban
We report a case of optic disc pseudoduplication without pathological myopia. A 79-year-old woman presented with gradually decreased vision. Fundus examination showed macular drusen in both eyes and subretinal haemorrhage in the left eye. Both optic discs appeared to be tilted and the left optic disc was seen to be inferiorly duplicated. Pseudodoubling of the optic discs can be caused by optic disc and peripapillary chorioretinal colobomas and pathological myopia. Considering that our patient did not have enough axial length to merit a diagnosis of pathological myopia and no pathological fundus lesions typical of elongated sclera, we suggest that acquired pseudoduplication is not a condition unique to pathological myopia, but can occur in all myopic patients...
October 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/27998660/prosthetic-dislocation-and-revision-after-primary-total-hip-arthroplasty-in-lumbar-fusion-patients-a-propensity-score-matched-pair-analysis
#4
Dean C Perfetti, Ran Schwarzkopf, Aaron J Buckland, Carl B Paulino, Jonathan M Vigdorchik
BACKGROUND: Lumbar-pelvic fusion reduces the variation in pelvic tilt in functional situations by reducing lumbar spine flexibility, which is thought to be important in maintaining stability of a total hip arthroplasty (THA). We compared dislocation and revision rates for patients with lumbar fusion and subsequent THA to a matched comparison cohort with hip and spine degenerative changes undergoing only THA. METHODS: We identified patients in New York State who underwent primary elective lumbar fusion for degenerative disc disease pathology and subsequent THA between January 2005 and December 2012...
November 23, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/27989074/excellence-and-durability-a-normally-functioning-bj%C3%A3-%C3%A2-rk-shiley-flat-disc-prosthesis-42-years-post-implantation
#5
Armaan Shaikh, A Jamil Tajik
Mechanical heart valves have been used worldwide for more than 60 years. While the composition and design of the valves, and the surgical techniques employed to implant them, have changed and advanced over that time, some of the earlier mechanical heart valves showed such great durability that they are still functioning in patients today. One of the most often-used and long-lasting mechanical prostheses was the Björk-Shiley heart valve. While many versions of this valve were used during its 25 years of production, the most durable was the Björk-Shiley flat-disc valve...
March 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/27982204/corneal-structure-in-tilted-disc-syndrome
#6
Abuzer Gunduz, Nihat Polat, Tongabay Cumurcu, ErsinErsan Demirel, Ercan Özsoy
Purpose: To evaluate the central corneal thickness (CCT), corneal volume (CV), and anterior and posterior corneal surfaces using the Scheimpflug imaging system in patients diagnosed with tilted disc syndrome (TDS). Methods: The study group (Group 1) and the control group (Group 2) comprised 35 eyes of 35 age-, sex-, and refraction-matched cases. All cases underwent a full ophthalmic examination that included cycloplegic refraction, axial ocular length measurement, and Scheimpflug imaging...
September 2016: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/27943601/surgical-repair-of-annulus-defect-with-biomimetic-multilamellar-nano-microfibrous-scaffold-in-a-porcine-model
#7
R Kang, H Li, Z Xi, S Ringgard, A Baatrup, K Rickers, M Sun, D Q S Le, M Wang, L Xie, Y Xie, M Chen, C Bünger
Annulus defect is associated with reherniation and disc degeneration after discectomy; currently there is no effective treatment that addresses this problem. The annulus is a hierarchical lamellar structure, where each lamella consists of aligned collagen fibers, which are parallel and tilted at 30° to the spinal axis. In this study, a biomimetic biodegradable scaffold consisting multi-lamella nano/microfibers, sharing nano-topography and micro-porosity similar to the native lamellar structure, was assessed in a porcine model, aided by sealing with fascia and medical glue and subsequent suture fixation...
December 11, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27935604/ocular-characteristics-associated-with-the-location-of-focal-lamina-cribrosa-defects-in-open-angle-glaucoma-patients
#8
H-Yl Park, Y S Hwang, C K Park
PurposeTo investigate the clinical characteristics according to the location of focal lamina cribrosa (LC) defects and its associated ocular features.Patients and methodsA total of 139 open-angle glaucoma patients underwent Spectralis optical coherence tomography (OCT) with enhanced depth imaging. Alterations in the contour of the LC were investigated to find focal LC defects. The location of the visible LC defect from the neural canal wall (far-peripheral and mid-peripheral) and clock-hour position (superotemporal, temporal and inferotemporal) were classified...
December 9, 2016: Eye
https://www.readbyqxmd.com/read/27898445/pathologic-myopia
#9
Kyoko Ohno-Matsui
Pathologic myopia (PM) is the only myopia that causes the loss of best-corrected visual acuity. The main reason for best-corrected visual acuity loss is complications specific to PM, such as myopic maculopathy, myopic traction maculopathy, and myopic optic neuropathy (or glaucoma). The meta-analyses of the PM study group (META-PM study) made a classification system for myopic maculopathy. On the basis of this study, PM has been defined as eyes having atrophic changes equal to or more severe than diffuse atrophy...
November 2016: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/27847073/impingement-of-single-tilting-disc-mitral-prosthesis-during-transcatheter-aortic-valve%C3%A2-replacement
#10
John J Squiers, Katherine R Hebeler, J Michael DiMaio, Patrick Ogbue, Molly Szerlip, William T Brinkman
An 80-year-old woman with a medical history of mitral valve replacement with single-tilting disc prosthesis underwent transcatheter aortic valve replacement (TAVR). The tilting disc was noted to have abnormal motion after re-ballooning of the TAVR valve. Cardiopulmonary bypass was initiated, and the procedure was converted to surgical aortic valve replacement. After removal of the TAVR valve, the tilting disc moved freely. Although TAVR in patients with mitral prostheses is technically feasible, particular caution is necessary, and postdeployment dilation should be avoided...
December 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27837279/optic-disc-and-peripapillary-retinal-nerve-fiber-layer-characteristics-associated-with-glaucomatous-optic-disc-in-young-myopia
#11
Jong Eun Lee, Kyung Rim Sung, Ji Min Park, Joo Young Yoon, Sung Yong Kang, Sung Bae Park, Hyung Jin Koo
PURPOSE: To explore optic disc and peripapillary retinal nerve fiber layer (RNFL) features associated with glaucomatous optic disc (GOD) in young myopia. METHODS: Presence of GOD, optic disc tilt, and disc torsion were determined using fundus photographs. If the measured disc tilt ratio was >1.3, the optic disc was classified as tilted. Optic disc torsion was defined as a >15° deviation in the long axis of the optic disc from the vertical meridian. The average and four quadrants RNFL thicknesses were assessed using spectral domain optical coherence tomography (SD-OCT)...
November 11, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/27820904/morphology-of-cyprid-attachment-organs-compared-across-disparate-barnacle-taxa-does-it-relate-to-habitat
#12
Hamad Al-Yahya, Hsi-Nien Chen, Benny K K Chan, Ryusuke Kado, Jens T Høeg
This study used morphometric analyses to compare the structure of the third antennular segment, also called the attachment organ, in cyprid larvae from cirripede species representing a diverse set of taxonomic groups. The aim was to investigate the degree of morphological variation in view of the diversity of habitats, settlement substrata, and modes of life found in the Cirripedia. In all cyprids the third segment features a flat surface (the attachment disc) covered with small cuticular villi thought to function in adhesion...
October 2016: Biological Bulletin
https://www.readbyqxmd.com/read/27816390/biomechanical-analysis-of-combining-head-down-tilt-traction-with-vibration-for-different-grades-of-degeneration-of-the-lumbar-spine
#13
Sicong Wang, Lizhen Wang, Yawei Wang, Chengfei Du, Ming Zhang, Yubo Fan
In recent years, a combination of traction and vibration therapy is usually used to alleviate low back pain (LBP) in clinical settings. Combining head-down tilt (HDT) traction with vibration was demonstrated to be efficacious for LBP patients in our previous study. However, the biomechanics of the lumbar spine during this combined treatment is not well known and need quantitative analysis. In addition, LBP patients have different grades of degeneration of the lumbar spinal structure, which are often age related...
January 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/27796669/vertical-asymmetry-of-lamina-cribrosa-tilt-angles-using-wide-bandwidth-femtosecond-mode-locked-laser-oct-effect-of-myopia-and-glaucoma
#14
Takuhei Shoji, Hiroto Kuroda, Masayuki Suzuki, Hisashi Ibuki, Makoto Araie, Shin Yoneya
PURPOSE: Morphological features of the lamina cribrosa (LC) and optic disc may be important in the pathogenesis of glaucoma and myopic neuropathy. We therefore performed a cross-sectional study of patients with glaucoma and myopic neuropathy to evaluate vertical asymmetry of LC tilt angles (LCTAs) from Bruch's membrane opening (BMO). MATERIAL AND METHODS: Forty-six control eyes and 35 primary open-angle glaucoma (POAG) eyes were included. A raster scanning protocol with 300 single B-scans (without averaging) were obtained using optical coherence tomography with a wide-bandwidth, femtosecond mode-locked (ML) laser...
January 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/27772574/karl-viktor-hall-from-in-situ-vein-bypass-to-the-tilting-disc-heart-valve-prosthesis
#15
John-Peder Escobar Kvitting, Odd R Geiran
In 1977, Karl Viktor Hall implanted a novel tilting disc heart valve prosthesis at Rikshospitalet in Oslo, Norway. The Medtronic-Hall valve was known for its excellent durability and low thrombogenicity. Hall popularized the use of the great saphenous vein in situ as an arterial shunt in the 1960s, made a metal stripper to lyse vein valves, and introduced electromagnetic flowmeters in vascular surgery. He performed the first coronary artery bypass graft in Scandinavia in 1969. Under his leadership the first heart transplantation and the first heart-lung transplantation were performed in Scandinavia by his successor Tor Frøysaker in 1983 and 1986, respectively...
2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27755347/optic-disc-characteristics-and-visual-field-progression-in-normal-tension-glaucoma-patients-with-tilted-optic-discs
#16
Youngkyo Kwun, Gyule Han, Yoon-Jung Choy, Jong Chul Han, Changwon Kee
PURPOSE OF THE STUDY: The purpose of the study was to evaluate the optic disc characteristics associated with visual field (VF) progression in normal tension glaucoma (NTG) eyes with tilted optic discs. METHODS: Sixty-six eyes of 66 NTG patients with tilted optic disc were included in this cross-sectional study, who were examined by at least 5 Humphrey 30-2 VFs. Glaucomatous VF progression was evaluated using pointwise linear regression. Optic nerve heads were scanned with enhanced-depth imaging optical coherence tomography (EDI-OCT), and evaluated for the focal lamina cribrosa (LC) defects and LC thicknesses...
October 14, 2016: Journal of Glaucoma
https://www.readbyqxmd.com/read/27753756/correlations-between-retinal-nerve-fiber-layer-thickness-and-axial-length-peripapillary-retinal-tilt-optic-disc-size-and-retinal-artery-position-in-healthy-eyes
#17
Takehiro Yamashita, Taiji Sakamoto, Naoya Yoshihara, Hiroto Terasaki, Minoru Tanaka, Yuya Kii, Kumiko Nakao
PURPOSE: To determine the correlations between the retinal nerve fiber layer thickness (RNFLT) and the axial length, peripapillary retinal tilt (PRT), and optic disc size, and retinal artery position. METHODS: A prospective, observational cross-sectional study of 119 healthy right eyes of 119 volunteers. All participants underwent comprehensive ophthalmologic examinations including peripapillary RNFLT imaging and measurements of the axial length. The RNFLT was determined by the TOPCON 3D OCT-1000, MARK II...
January 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/27733169/pedicle-subtraction-osteotomy-and-disc-resection-with-cage-placement-in-post-traumatic-thoracolumbar-kyphosis-a-retrospective-study
#18
Wenhao Hu, Bin Wang, Hongyu Run, Xuesong Zhang, Yan Wang
BACKGROUND: It is estimated that upwards of 50,000 individuals suffer traumatic fracture of the spine each year, and the instability of the fractured vertebra and/or the local deformity results in pain and, if kyphosis increases, neurological impairment can occur. There is a significant controversy over the ideal management. The purpose of the study is to present clinical and radiographic results of pedicle subtraction osteotomy and disc resection with cage placement in correcting post-traumatic thoracolumbar kyphosis...
October 12, 2016: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/27714512/optic-disc-tilt-direction-affects-regional-visual-field-progression-rates-in-myopic-eyes-with-open-angle-glaucoma
#19
Jong Rak Lee, Jiyun Lee, Jong-Eun Lee, Jin Young Lee, Michael S Kook
PURPOSE: To compare global and regional visual field (VF) progression rates and determine clinical factors associated with rapid VF progression in myopic patients with open-angle glaucoma (OAG) with different disc tilt directions. METHODS: The medical records of 182 eyes from 182 myopic OAG patients with progressive VF deterioration during follow-up were analyzed. The rates of change in the mean thresholds of the global and regional VF areas of the horizontal and vertical disc tilt (HDT and VDT) groups were compared using a linear mixed model after controlling for confounding covariates...
October 6, 2016: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/27704285/cobb-1-versus-cobb-to-cobb-anterior-fusion-for-adolescent-idiopathic-scoliosis-lenke-5c-curves-a-radiological-comparative-study
#20
Arnaud Dubory, Lotfi Miladi, Brice Ilharreborde, Jean-Marie Gennari, Jihane Rouissi, Christophe Glorion, Charles Henri Flouzat Lachaniette, Thierry Odent
PURPOSE: Anterior fusion is a well-established procedure for the treatment of Lenke 5C adolescent idiopathic scoliosis (AIS). This retrospective study aimed to assess preoperative and postoperative radiographic differences between the conventional anterior fusion and anterior short fusions (ASF) in Lenke 5C AIS. METHODS: Radiographic data of 42 consecutive cases of Lenke 5C AIS, which were surgically treated through anterior segmental fusion, were analyzed retrospectively...
October 4, 2016: European Spine Journal
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