keyword
MENU ▼
Read by QxMD icon Read
search

tilt of disc

keyword
https://www.readbyqxmd.com/read/28641680/ophthalmological-evaluation-of-integrated-resistance-and-aerobic-training-during-70-day-bed-rest
#1
Giovanni Taibbi, Ronita L Cromwell, Susana B Zanello, Patrice O Yarbough, Robert J Ploutz-Snyder, Bernard F Godley, Gianmarco Vizzeri
INTRODUCTION: We evaluated ophthalmic changes in healthy individuals who underwent integrated resistance and aerobic training (iRAT) during 70-d 6° head-down tilt (HDT) bed rest (BR). METHODS: Participants were selected using NASA standard screening procedures. Standardized NASA BR conditions were implemented. Subjects were randomly assigned to the iRAT protocol or no exercise during HDTBR. Weekly ophthalmic examinations were performed in the sitting (pre/post-BR only) and HDT (BR only) positions...
July 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28611153/effects-of-short-term-mild-hypercapnia-during-head-down-tilt-on-intracranial-pressure-and-ocular-structures-in-healthy-human-subjects
#2
Steven S Laurie, Gianmarco Vizzeri, Giovanni Taibbi, Connor R Ferguson, Xiao Hu, Stuart M C Lee, Robert Ploutz-Snyder, Scott M Smith, Sara R Zwart, Michael B Stenger
Many astronauts experience ocular structural and functional changes during long-duration spaceflight, including choroidal folds, optic disc edema, globe flattening, optic nerve sheath diameter (ONSD) distension, retinal nerve fiber layer thickening, and decreased visual acuity. The leading hypothesis suggests that weightlessness-induced cephalad fluid shifts increase intracranial pressure (ICP), which contributes to the ocular structural changes, but elevated ambient CO2 levels on the International Space Station may also be a factor...
June 2017: Physiological Reports
https://www.readbyqxmd.com/read/28555457/-situs-inversus-of-the-optic-nerve-a-case-report
#3
I Lopez-Cuenca, R de Hoz, E Salobrar-Garcia, B Rojas, A I Ramirez, J J Salazar, A Trivino, J M Ramirez
INTRODUCTION: Situs inversus of the optic nerve is a congenital anomaly characterised by the emergence of the vessels in the retina towards the nose rather than in a temporal direction. It is caused by an anomalous insertion of the optic stalks into the optic vesicle that gives rise to dysversion of the head of the optic nerve. It is not an isolated condition and usually appears jointly with tilted disc syndrome and in patients with myopia. It is characterised by the presence of inferior conus atrophy, deficiencies in the temporal visual field, refraction defects and ambliopy...
June 1, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28551164/multiple-temporal-lamina-cribrosa-defects-in-myopic-eyes-with-glaucoma-and-their-association-with-visual-field-defects
#4
Yu Sawada, Makoto Araie, Makoto Ishikawa, Takeshi Yoshitomi
PURPOSE: To investigate characteristics of lamina cribrosa (LC) defects in myopic eyes with open-angle glaucoma (OAG) using spectral-domain (SD) optical coherence tomography (OCT). DESIGN: Cross-sectional study. PARTICIPANTS: One hundred thirty-three eyes with OAG and 83 eyes without OAG, with axial length of 24 mm or more. METHODS: Serial enhanced depth imaging SD OCT B-scans of the optic disc were acquired and reviewed for LC defects (diameter, ≥100 μm) and large pores (diameter, 60-100 μm)...
May 24, 2017: Ophthalmology
https://www.readbyqxmd.com/read/28545560/influences-of-lumbar-disc-herniation-on-the-kinematics-in-multi-segmental-spine-pelvis-and-lower-extremities-during-five-activities-of-daily-living
#5
Shengzheng Kuai, Wenyu Zhou, Zhenhua Liao, Run Ji, Daiqi Guo, Rui Zhang, Weiqiang Liu
BACKGROUND: Low back pain (LBP) is a common problem that can contribute to motor dysfunction. Previous studies reporting the changes in kinematic characteristics caused by LBP present conflicting results. This study aimed to apply the multisegmental spinal model to investigate the kinematic changes in patients with lumbar disc herniation (LDH) during five activities of daily living (ADLs). METHODS: Twenty-six healthy subjects and 7 LDH patients participated in this study and performed level walking, stair climbing, trunk flexion, and ipsilateral and contralateral pickups...
May 25, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28542289/structural-parameters-associated-with-location-of-peaks-of-peripapillary-retinal-nerve-fiber-layer-thickness-in-young-healthy-eyes
#6
Takehiro Yamashita, Ryo Asaoka, Yuya Kii, Hiroto Terasaki, Hiroshi Murata, Taiji Sakamoto
The location of the peaks of the circumpapillary retinal nerve fiber layer (cpRNFL) thickness is affected by several ocular parameters. In this study, we have generated equations that can determine the peaks of the cpRNFL. This study was a prospective, observational, cross sectional study of 118 healthy right eyes. The axial length, optic disc tilt, superiortemporal (ST)- and inferiortemporal (IT)-peaks of the cpRNFL thickness, and angles of the ST and IT retinal arteries (RA) and veins (RV) were determined...
2017: PloS One
https://www.readbyqxmd.com/read/28511802/-a-continuous-series-of-27-adult-patients-treated-for-l5-s1-isthmic-spondylolisthesis-by-combined-approach-clinical-and-radiological-outcomes-at-1-year-follow-up
#7
N Koné, E Freitas Olim, P Coloma, A Rusconi, L Chenin, O Sy, I S Souaré, C Barrey
Through this single-center consecutive prospective study, we evaluated the results of a combined approach for L5-S1 isthmic spondylolisthesis, using a polyetheretherketone (PEEK) interbody lordotic cage during anterior approach and pedicle screw-based posterior fixation. Between 2010 and 2014, 27 adult patients were treated for L5-S1 isthmic spondylolisthesis (high and low grades) by a combined approach with a minimum follow-up of one year. Clinical outcome was assessed before surgical treatment and at four months and one year after surgery by: VAS, Oswestry Index (ODI) and Rolland-Morris scores...
May 13, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28501956/an-in-vitro-evaluation-of-sagittal-alignment-in-the-cervical-spine-after-insertion-of-supraphysiologic-lordotic-implants
#8
Donald J Blaskiewicz, Jeffrey E Harris, Patrick P Han, Alexander W Turner, Gregory M Mundis
PURPOSE: Cervical spine malalignment can develop as a consequence of degenerative disc disease or following spinal surgery. When normal sagittal alignment of the spine is disrupted, further degeneration may occur adjacent to the deformity. The purpose of this study was to investigate changes in lordosis and sagittal alignment in the cervical spine after insertion of supraphysiologic lordotic implants. METHODS: Eight cadaveric cervical spines (Occiput-T1) were tested...
May 13, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28495841/lower-body-negative-pressure-decreases-non-invasively-measured-intracranial-pressure-and-internal-jugular-vein-cross-sectional-area-during-head-down-tilt
#9
William Watkins, Alan R Hargens, Shannon Baird, Erika Marie Clary, Brandon R Macias
INTRODUCTION: Long-term space flight induces a near visual acuity change in approximately 50% of astronauts. In some crew members, postflight cerebrospinal fluid (CSF) opening pressures by lumbar puncture are as high as 20.9 mmHg who demonstrated optic disc edema. CSF communicates through the cochlear aqueduct to affect perilymphatic pressure and tympanic membrane motion. We hypothesized that 50 mmHg of lower-body negative pressure (LBNP) during 15° head-down tilt (HDT) would mitigate elevations in internal jugular vein cross-sectional area (IJV CSA) and intracranial pressure (ICP)...
May 11, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28486730/die-randunscharfe-papille-eine-diagnostische-herausforderung
#10
Julia Biermann, Wolf Alexander Lagrèze
Correct differential diagnosis in cases of blurred optic disc margins is a challenging task for ophthalmologists. The reliable differentiation of pseudopapilloedema and true papilloedema has significant implications for proper patient management. Conditions that give rise to pseudopapilloedema include small crowded discs, tilted discs and optic nerve head drusen. Conditions that cause bilateral true swelling of the optic nerve head with initially good visual acuity include those that are secondary to raised intracranial pressure (optic disc edema, ODE)...
June 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28420175/a-new-input-device-for-spastics-based-on-strain-gauge
#11
Niels Buchhold, Christian Baumgartner
This article presents a new sensor for use by people with spastic disorders and similar conditions and enables them to steer and control medical devices such as electric powered wheelchairs. As spastic patients often suffer from cramping of their extremities, which can then no longer be controlled, using a standard joystick while operating a powered wheelchair can lead to dangerous situations. To prevent this, we designed a sensor based on strain gauges, which is shaped like a flat disc that can be operated using any body part...
April 17, 2017: Sensors
https://www.readbyqxmd.com/read/28396340/myopic-glaucomatous-eyes-with-or-without-optic-disc-shape-alteration-a-longitudinal-study
#12
Junki Kwon, Kyung Rim Sung, Ji Min Park
AIMS: To compare the clinical courses of patients with myopic primary open angle glaucoma (POAG) with and without optic disc shape alterations. METHODS: In this longitudinal retrospective study, 146 eyes from 146 patients with myopic (axial length(AXL),>24 mm) POAG were classified according to optic disc shape alterations defined by optic disc tilt and/or rotation. Glaucomatous progression was determined by either serial optic disc/retinal nerve fibre layer photographs or visual field (VF) exams...
April 10, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/28395636/ttk-chitra-tilting-disc-heart-valve-model-tc2-an-assessment-of-fatigue-life-and-durability
#13
N N Subhash, Adathala Rajeev, Sreedharan Sujesh, C V Muraleedharan
Average age group of heart valve replacement in India and most of the Third World countries is below 30 years. Hence, the valve for such patients need to be designed to have a service life of 50 years or more which corresponds to 2000 million cycles of operation. The purpose of this study was to assess the structural performance of the TTK Chitra tilting disc heart valve model TC2 and thereby address its durability. The TC2 model tilting disc heart valves were assessed to evaluate the risks connected with potential structural failure modes...
April 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28383441/radiological-analysis-for-thoracolumbar-disc-herniation-in-spinopelvic-sagittal-alignment-a-retrospective-study
#14
Tao Wang, Lei Ma, Da-Long Yang, Hui Wang, Di Zhang, Ying-Ze Zhang, Wen-Yuan Ding
A retrospective study aims to explore differences in spinopelvic sagittal alignment between thoracolumbar disc herniation (TLD) and lower lumbar disc herniation (LLD).A total of 185 patients included 26 with TLD and 129 with LLD and 30 asymptomatic volunteers in normal group (NG). Each individual took full spine X-ray to evaluate pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS), lumbar lordosis (LL), thoracic kyphosis (TK), TK+LL+PI, TK/LL, and sacrum-femoral-pubic symphysis (SFP). The Roussouly classification was used to categorize all subjects according to their sagittal alignment...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28347933/mechanical-effects-of-traction-on-lumbar-intervertebral-discs-a%C3%A2-magnetic-resonance-imaging-study
#15
Daniel H K Chow, Ernest M K Yuen, L Xiao, Mason C P Leung
BACKGROUND: Although traction has long been used for treating patients with low back pain (LBP), its effects are still inconclusive mainly because of limited high-quality evidence. OBJECTIVE: To provide evidence of the mechanism of traction on lumbar intervertebral discs. DESIGN: A quantitative approach with a repeated measurement protocol. METHOD: Nine participants (mean age = 22.1 ± 0.8 years) without any LBP history were recruited...
June 2017: Musculoskeletal Science & Practice
https://www.readbyqxmd.com/read/28333895/visual-field-defects-in-young-patients-with-open-angle-glaucoma-comparison-between-high-tension-and-normal-tension-glaucoma
#16
Ji-Hye Park, Chungkwon Yoo, Jinhwan Park, Yong Yeon Kim
PURPOSE: To investigate the clinical features of young Korean patients with open-angle glaucoma (OAG), and to compare visual field (VF) defects between patients with normal-tension glaucoma (NTG) and those with high-tension glaucoma (HTG). MATERIALS AND METHODS: Patients with OAG younger than 40 years of age were divided into NTG and HTG groups based on untreated intraocular pressure (IOP) level. The patients were matched according to the mean deviation of standard automated perimetry...
June 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/28289843/micro-ct-evaluation-of-asymmetrical-ovine-intervertebral-disc-height-loss-from-surgical-approach
#17
Christopher Ludtka, Stefan Schwan, Andrea Friedmann, Walther Brehm, Ingo Wiesner, Felix Goehre
PURPOSE: The primary goal of this study is to clearly define and evaluate new intervertebral disc height parameters in analysing the morphological pathology of disc degeneration for application in damage model and regeneration therapy development, as well as applying traditional variables to 3-D characterization methods. METHODS: A posterolateral surgical approach was used to induce disc degeneration in an ovine model. At 12-months post-operation, sheep vertebral segments were removed and characterized using micro-CT to evaluate disc height parameters in regard to injury localization...
March 13, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28282064/predicting-the-risk-of-parafoveal-scotoma-in-myopic-normal-tension-glaucoma-role-of-optic-disc-tilt-and-rotation
#18
M S Sung, H Heo, Y S Ji, S W Park
PurposeThe purpose of the study was to evaluate the factors associated with development of parafoveal scotoma in early myopic normal tension glaucoma (NTG).Patients and methodsNinety-nine myopic NTG patients with mean deviation (MD) >-6.0 decibels (dB) were enrolled. Parafoveal scotoma was defined as a visual field (VF) defect within 10° of fixation with at least one point at P<1% lying at the four innermost central points. Systemic factors, optic disc characteristics including tilt ratio, rotation degree, β-zone parapapillary atrophy, disc hemorrhage, and peripapillary retinal nerve fiber layer and macular ganglion cell-inner plexiform layer (mGCIPL) thickness parameters using optical coherence tomography were evaluated...
March 10, 2017: Eye
https://www.readbyqxmd.com/read/28280945/influence-of-intraocular-pressure-reduction-on-progression-of-normal-tension-glaucoma-with-myopic-tilted-disc-and-associated-risk-factors
#19
Bo Ram Seol, Soa Kim, Dong Myung Kim, Ki Ho Park, Jin Wook Jeoung, Seok Hwan Kim
Purpose To evaluate the influence of intraocular pressure (IOP) reduction on progression of normal-tension glaucoma (NTG) with myopic tilted disc and to demonstrate the associated risk factors. METHODS: The medical records on 109 eyes of 109 NTG patients with myopic tilted discs who were followed up for more than 5 years and treated with topical medications were reviewed. Glaucoma progression was defined according to either structural or functional deterioration. Patients were divided into tertile groups according to the percent IOP reduction from the baseline, and the cumulative probability of NTG nonprogression of the upper- and lower-tertile groups was compared using Kaplan-Meier survival analysis...
March 9, 2017: Japanese Journal of Ophthalmology
https://www.readbyqxmd.com/read/28265884/d%C3%A3-bridement-and-reconstruction-improve-postoperative-sagittal-alignment-in-kyphotic-cervical-spinal-tuberculosis
#20
Zhimin Pan, Jiaquan Luo, Limin Yu, Yiwei Chen, Junlong Zhong, Zhiyun Li, Zhaoxun Zeng, Pingguo Duan, Yoon Ha, Kai Cao
BACKGROUND: Cervical spinal tuberculosis is relatively common in some developing countries. It erodes vertebrae and discs, which sometimes results in cervical kyphosis and myelopathy. However, to our knowledge, no studies have evaluated improvements to patient-reported outcomes among patients who undergo surgical cervical sagittal realignment after kyphotic cervical spinal tuberculosis has been treated by débridement and reconstruction. QUESTIONS/PURPOSES: (1) Can a spine with kyphotic cervical spinal tuberculosis be returned to normal alignment and fused successfully? (2) Will patient-reported outcomes be improved with this intervention? (3) Are patient-reported outcomes correlated with realignment? METHODS: Forty-six patients with kyphotic cervical spinal tuberculosis were evaluated in this retrospective study...
March 6, 2017: Clinical Orthopaedics and related Research
keyword
keyword
37128
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"