keyword
MENU ▼
Read by QxMD icon Read
search

Tilt test

keyword
https://www.readbyqxmd.com/read/29225329/medial-patellofemoral-ligament-reconstruction-with-semi-patellar-tunnel-fixation-surgical-technique-and-mid-term-follow-up
#1
Jinghui Niu, Qi Qi, Kunpeng Fu, Guman Duan, Chang Liu, Fei Wang
BACKGROUND The present study aimed to describe a new safe and economical technique for medial patellofemoral ligament (MPFL) reconstruction with satisfactory clinical outcomes, and present the results of a four-year follow-up. MATERIAL AND METHODS Thirty-two patients with recurrent patella dislocation, who underwent MPFL reconstruction with two semi-patellar tunnels and hardware-free patellar fixation between 2011 and 2013, were included in the study. Patella stability was tested by an apprehension test preoperatively and at follow-up...
December 11, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29222896/serum-vitamin-b-12-in-children-presenting-with-vasovagal-syncope
#2
Ayhan Pektas, Resit Koken, Halit Bugra Koca
BACKGROUND AND OBJECTIVES: The present study aims to determine the serum vitamin B-12 in children presenting with vasovagal syncope. METHODS AND STUDY DESIGN: This is a prospective review of 160 children presenting with vasovagal syncope. Subgroup analysis was done based on the results of head up tilt test. RESULTS: Head up tilt test gave positive results in 80 children and yielded negative results in the remaining 80 children. The tilt test positive children had significantly lower thyroid stimulating hormone concentrations (p=0...
2018: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29216089/stitching-test-of-large-flats-by-using-two-orthogonally-arranged-wavefront-interferometers
#3
Shanyong Chen, Chuanchao Wu, Guipeng Tie, Dede Zhai
The most challenging problem in the stitching test of large flats with a small-aperture interferometer is the accumulation effect of the second-order error. As it is approximately enlarged by the square of the ratio of full aperture size to subaperture size, a very small amount of the second-order error in the reference surface of a transmission flat can be accumulated and gets far from negligible when the subaperture is far smaller than the full aperture. We present here a solution by using two orthogonally arranged wavefront interferometers...
November 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/29216080/modeling-near-null-testing-method-of-a-freeform-surface-with-a-deformable-mirror-compensator
#4
Yiwei He, Lei Huang, Xi Hou, Wu Fan, Rongguang Liang
We present and analyze a new measurement method of freeform surfaces with a deformable mirror (DM), which functions as a wavefront compensator. We discuss the maximum slope compensation of a DM in the first-order approximation and derive how to calculate the ideal DM form. A constrained optimization procedure is conducted to ensure the actual DM form fits the ideal DM form as closely as possible. To demonstrate the feasibility and understand the measurable range of our method, we evaluate freeform surfaces with a single Zernike term, the first 36 random Zernike terms, and 230 random Zernike terms...
November 20, 2017: Applied Optics
https://www.readbyqxmd.com/read/29212669/long-duration-bed-rest-modifies-sympathetic-neural-recruitment-strategies-in-males-and-females
#5
Stephen A Klassen, Steven De Abreu, Danielle K Greaves, Derek S Kimmerly, Philippe Arbeille, Pierre Denise, Richard L Hughson, Hervé Normand, J Kevin Shoemaker
To understand the impact of physical deconditioning with head-down tilt bed rest (HDBR) on the malleability of sympathetic discharge patterns, we studied a) baseline integrated muscle sympathetic nerve activity (MSNA; microneurography) from 13 females participating in the WISE-2005 60-day HDBR study (Female, retrospective analysis), b) integrated MSNA and multi-unit action potential (AP) analysis in 13 males (Male) performed on data collected at baseline and during physiological stress imposed by end-inspiratory apnea, in a new 60-day HDBR study, and c) a repeatability study (Control, n = 6, retrospective analysis, 4 weeks between tests)...
December 6, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29210841/comparison-of-heart-rate-variability-parameters-to-the-autonomic-reflex-screen-in-postural-orthostatic-tachycardia-syndrome-and-neurogenic-orthostatic-hypotension
#6
Jacquie Baker, Juan M Racosta, Kurt Kimpinski
PURPOSE: The clinical significance of heart rate variability (HRV) in the context of autonomic dysfunction continues to be a matter of debate. Therefore, the purpose of the current study was to investigate the clinical relevance of HRV in the context of autonomic dysfunction. METHODS: Heart rate variability data from 225 volunteers consisting of controls (n = 166) and patients with mild (n = 25) and severe (n = 34) autonomic dysfunction were retrospectively analyzed...
November 23, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29195353/an-optically-referenced-inclinometer-with-sub-microradian-repeatability
#7
Donald G Bruns
A pendulum inclinometer has been built and tested, suitable for measuring the deflection of the gravitational vertical to an accuracy of 1 μrad. The design is based on measuring the differential capacitance between a pendulum bob and two closely spaced parallel electrodes. Two independent pendulums are oriented orthogonally to measure both coordinates. A collimated optical beam is stably attached to the inclinometer pair and provides a means for making stellar measurements relative to the gravitational vertical...
November 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/29192954/is-heart-rate-recovery-index-a-predictive-factor-for-cardioinhibitory-syncope
#8
Volkan Emren, Uğur Kocabaş
BACKGROUND: Cardionhibitory syncope is related with excessive bradycardia or asystole due to parasympathetic response. AIM: We investigated whether patients with cardioinhibitory syncope have higher heart rate recovery index (HRRi) considered as an parasympathetic system activation in exercises stress testing (EST) than other those with other neurogenic syncope forms METHODS: A total of 262 patients who had neurogenic syncope documented by head-up tilt test (HUTT) and 199 healthy control individuals were examined...
December 1, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/29189552/autonomic-reflex-screen-test-abnormalities-in-cold-induced-sweating-syndrome-type-1
#9
Ahmed M El-Dokla, Jannatul Ferdous, Sara T Ali, Khondoker Alam
Cold-induced sweating syndrome (CISS) is a rare autosomal recessive disease due to mutation in the Cytokine receptor-like factor 1 (CRLF1). The characteristic symptom of CISS is the tendency to sweat profusely especially in the upper body and hands when the patient is exposed to cold temperature. We sought to first report the findings of autonomic reflex screen in a case of CISS type 1 with Cytokine receptor-like factor 1 mutation. Valsalva morphology, Valsalva ratio, and heart rate response to deep breathing were normal for the patient's age...
December 2017: Journal of Clinical Neuromuscular Disease
https://www.readbyqxmd.com/read/29185078/evaluation-of-autonomic-functions-of-patients-with-multiple-system-atrophy-and-parkinson-s-disease-by-head-up-tilt-test
#10
Chikako Watano, Yuri Shiota, Keiichi Onoda, Abdullah Md Sheikh, Seiji Mishima, Eri Nitta, Shozo Yano, Shuhei Yamaguchi, Atsushi Nagai
The aim of this study was to evaluate the autonomic neural function in Parkinson's disease (PD) and multiple system atrophy (MSA) with head-up tilt test and spectral analysis of cardiovascular parameters. This study included 15 patients with MSA, 15 patients with PD, and 29 healthy control (HC) subjects. High frequency power of the RR interval (RR-HF), the ratio of low frequency power of RR interval to RR-HF (RR-LF/HF) and LF power of systolic BP were used to evaluate parasympathetic, cardiac sympathetic and vasomotor sympathetic functions, respectively...
November 28, 2017: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29182378/early-changes-in-cerebral-autoregulation-among-youth-hospitalized-after-sports-related-traumatic-brain-injury
#11
Monica S Vavilala, Carly K Farr, Arraya Watanitanon, Bs Crystalyn Clark-Bell, Theerada Chandee, Anne Moore, William Armstead
OBJECTIVE: To examine early cerebral haemodynamic changes among youth hospitalized with sports-related traumatic brain injury (TBI). STUDY DESIGN: Youth 0-18 years admitted to a level one trauma centre with sports-related TBI were enrolled. Daily measures included clinical symptoms and Glasgow Coma Scale (GCS) score. Using Transcranial Doppler (TCD) ultrasonography and tilt testing, we measured middle cerebral artery flow velocity (Vmca) and cerebral autoregulation index (ARI)...
November 28, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/29176565/new-early-cretaceous-palaeomagnetic-and-geochronological-results-from-the-far-western-lhasa-terrane-contributions-to-the-lhasa-qiangtang-collision
#12
Weiwei Bian, Tianshui Yang, Yiming Ma, Jingjie Jin, Feng Gao, Shihong Zhang, Huaichun Wu, Haiyan Li
To better constrain the Lhasa-Qiangtang collision, a combined palaeomagnetic and geochronological study of the far western Lhasa terrane was conducted on the Duoai Formation lava flows (~113-116 Ma), as well as on the Early Cretaceous Jiega Formation limestone. Following detailed rock magnetic, petrographical, and palaeomagnetic experiments, characteristic remanent magnetisation directions were successfully isolated from most samples using principal component analysis. The tilt-corrected direction groups yielded a palaeopole at 69...
November 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29176136/plasma-neuropeptide-y-levels-in-vasovagal-syncope-in-children
#13
Ying Liao, Wen-Rui Xu, Hong-Xia Li, Chao-Shu Tang, Hong-Fang Jin, Jun-Bao Du
BACKGROUND: Vasovagal syncope (VVS) is the most common cause of syncope in children. Neuropeptide Y (NPY) plays an important role in the regulation of blood pressure (BP), as well as myocardial contractility. This study aimed to explore the role of plasma NPY in VVS in children. METHODS: Fifty-six children who were diagnosed with VVS (VVS group) using head-up tilt test (HUT) and 31 healthy children who were selected as controls (control group) were enrolled. Plasma NPY concentrations were detected...
December 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/29175719/does-chronic-ankle-instability-influence-lower-extremity-muscle-activation-of-females-during-landing
#14
Yumeng Li, Jupil Ko, Marika A Walker, Cathleen N Brown, Julianne D Schmidt, Seock-Ho Kim, Kathy J Simpson
Much remains unclear about how chronic ankle instability (CAI) could affect knee muscle activations and interact with knee biomechanics. Therefore, the purpose of this study was to assess the influence of CAI on the lower extremity muscle activation at the ankle and knee joints during landings on a tilted surface. A surface electromyography system and two force plates were used to collect lower extremity muscle activation of 21 young female individuals with CAI and 21 pair-matched controls during a double-leg landing with test limb landing on the tilted surface...
November 22, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29167656/multivariate-analyses-of-balance-test-performance-vestibular-thresholds-and-age
#15
Faisal Karmali, María Carolina Bermúdez Rey, Torin K Clark, Wei Wang, Daniel M Merfeld
We previously published vestibular perceptual thresholds and performance in the Modified Romberg Test of Standing Balance in 105 healthy humans ranging from ages 18 to 80 (1). Self-motion thresholds in the dark included roll tilt about an earth-horizontal axis at 0.2 and 1 Hz, yaw rotation about an earth-vertical axis at 1 Hz, y-translation (interaural/lateral) at 1 Hz, and z-translation (vertical) at 1 Hz. In this study, we focus on multiple variable analyses not reported in the earlier study. Specifically, we investigate correlations (1) among the five thresholds measured and (2) between thresholds, age, and the chance of failing condition 4 of the balance test, which increases vestibular reliance by having subjects stand on foam with eyes closed...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29166666/evaluating-the-efficacy-of-an-active-compression-brace-on-orthostatic-cardiovascular-responses
#16
Hadi Moein, Ramandeep Jhalli, Andrew P Blaber, Victoria E Claydon, Carlo Menon
Orthostatic intolerance, one of the principle causes of syncope, can occur secondary to concomitant venous pooling and enhanced capillary filtration. We aimed to evaluate a prototype portable calf active compression brace (ACB) designed to improve orthostatic haemodynamic control. Fourteen healthy volunteers participated in a randomized, placebo controlled, cross-over, double-blind study. Testing consisted of head-upright tilting and walking on a treadmill conducted on two consecutive days with a pair of ACBs wrapped around both calves...
2017: PloS One
https://www.readbyqxmd.com/read/29165784/interventions-for-managing-skeletal-muscle-spasticity-following-traumatic-brain-injury
#17
REVIEW
Anneliese Synnot, Marisa Chau, Veronica Pitt, Denise O'Connor, Russell L Gruen, Jason Wasiak, Ornella Clavisi, Loyal Pattuwage, Kate Phillips
BACKGROUND: Skeletal muscle spasticity is a major physical complication resulting from traumatic brain injury (TBI), which can lead to muscle contracture, joint stiffness, reduced range of movement, broken skin and pain. Treatments for spasticity include a range of pharmacological and non-pharmacological interventions, often used in combination. Management of spasticity following TBI varies from other clinical populations because of the added complexity of behavioural and cognitive issues associated with TBI...
November 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29153480/spatial-orientation-and-postural-control-in-patients-with-parkinson-s-disease
#18
E Pawlitzki, C Schlenstedt, N Schmidt, I Rotkirch, F Gövert, G Hartwigsen, K Witt
Postural instability is one of the most disabling and risky symptoms of advanced Parkinson's disease (PD). The purpose of this study was to investigate whether and how this is mediated by a centrally impaired spatial orientation. Therefore, we performed a spatial orientation study in 21 PD patients (mean age 68years, SD 8.5 years, 9 women) in a medically on condition and 21 healthy controls (mean age 68.9years, SD 5.5years, 14 women). We compared their spatial responses to the horizontal axis (Sakashita's visual target cancellation task), the vertical axis (bucket-test), the sagittal axis (tilt table test) and postural stability using the Fullerton Advanced Balance Scale (FAB)...
November 13, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29142084/impaired-vestibular-responses-in-internuclear-ophthalmoplegia-association-and-dissociation
#19
Seo-Young Choi, Hyo-Jung Kim, Ji-Soo Kim
OBJECTIVE: To determine the role of the medial longitudinal fasciculus (MLF) in conveying vestibular signals. METHODS: In 10 patients with isolated acute unilateral internuclear ophthalmoplegia (INO) due to an acute stroke, we performed comprehensive vestibular evaluation using video-oculography, head impulse tests with a magnetic search coil technique, bithermal caloric tests, tests for the ocular tilt reaction, and measurements of subjective visual vertical and cervical and ocular vestibular evoked myogenic potentials (VEMPs)...
November 15, 2017: Neurology
https://www.readbyqxmd.com/read/29140379/seven-year-follow-up-of-full-arch-prostheses-supported-by-four-implants-a-prospective-study
#20
Karen Vaz Ayub, Eduardo Antônio Ayub, Accácio Lins do Valle, Gerson Bonfante, Thiago Pegoraro, Luiz Fernando
PURPOSE: To evaluate biologic and prosthetic outcomes of implant-supported mandibular full-arch fixed prostheses treated with the All-on-4 treatment concept after 7 years. MATERIALS AND METHODS: Patients were selected to receive full-arch fixed immediate prostheses supported by four implants up to 72 hours after surgery. The following biologic aspects were evaluated: Plaque Index (PI) and Bleeding Index (BI), implant stability by resonance frequency, and marginal bone loss (MBL) measured with the aid of periapical radiographs...
November 2017: International Journal of Oral & Maxillofacial Implants
keyword
keyword
18953
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"