Search Results
Results 301 - 350 of 2051
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Mynard Jonathan P - - 2011
Arterial wave speed estimated invasively from pressure (P) and velocity (U) measurements using the P-U loop method, or non-invasively from diameter (D) and U measurements using the lnD-U loop method, assume that during early systole 1) backward-running waves are absent and 2) wave speed is constant. These assumptions also form ...
Fatehee Naeem - - 2011
To investigate the effects of acute elevations in intraocular pressure (IOP) on the cup, prelaminar, and lamina cribrosa regions of the porcine optic nerve head (ONH). Ex vivo imaging of 10 porcine ONHs was performed using spectral-domain optical coherence tomography (OCT). The IOP was manipulated with a pressure head and ...
Lin Hong-Dun - - 2011
Clinically arterial stiffness has shown that it is the most important cause of cardiovascular complications and also an independent risk factor to several cardiovascular diseases. In routine, there are many preferable non-invasive methods, including pressure-sensitive transducers, applanation tonometry, Doppler ultrasound and MRI, to get insight of cardiovascular condition. However, the ...
Bianchi Matteo - - 2011
During manual palpation, clinicians rely on distributed tactile information to identify and localize hard lumps embedded in soft tissue. The development of tactile feedback systems to enhance palpation using robot-assisted minimally invasive surgery (RMIS) systems is challenging due to size and weight constraints, motivating a pneumatic actuation strategy. Recently, an ...
Nogawa Masamichi - - 2011
Up to now, we have successfully carried out the non-invasive beat-by-beat measurement of blood pressure (BP) in the root of finger, superficial temporal and radial artery based on the volume-compensation technique with reasonable accuracy. The present study concerns with improvement of control method for this beat-by-beat BP measurement. The measurement ...
Inui Shigeki - - 2011
Objective  To assess dermoscopic findings of "non-blanchable erythema" in stage I pressure ulcers and to determine their characteristics. Methods  Dermoscopic examinations using DermLite(®) II pro of redness over a bony prominence that did not resolve within 30 min of pressure relief or if a positional change was impossible for three days. Results  ...
Holtzman Megan - - 2011
A pressure sensor array placed below a mattress can be used to estimate the breathing effort signal unobtrusively. When multiple breathing effort sensor outputs are available, there is sometimes a need to choose the sensor with the best approximation of the actual breathing effort. Previous work with pressure sensor arrays ...
Lim Einly - - 2011
We propose a deadbeat controller for the control of pulsatile pump flow (Q(p) ) in an implantable rotary blood pump (IRBP). Noninvasive measurements of pump speed and current are used as inputs to a dynamical model of Q(p) estimation, previously developed and verified in our laboratory. The controller was tested ...
He Shao-Ru - - 2011
Echocardiography is regarded as a gold standard for measuring hemodynamic values. The ultrasonic cardiac output monitor (USCOM) is a new method for measuring hemodynamics and could provide non-invasive point of care guidance. So far, there are no published USCOM reference values for neonates, nor has USCOM's accuracy been established in ...
Alavarce Debora Cristina - - 2011
Arterial blood pressure measurement is an essential conduct to evaluate the condition of the cardiovascular system. Digital teaching environment is a powerful tool for the teaching-learning process, because it adds meaning and concreteness to the content to be learned, and it can be useful to instruct this procedure. The objective ...
Akpolat Tekin - - 2011
Home blood pressure monitoring requires a precise blood pressure measurement technique and an accurate sphygmomanometer. The oscillometric sphygmomanometers have some drawbacks including in accuracy. The aims of this study were to assess the inaccuracy of home sphygmomanometers using a method first proposed in 2009 and to compare validated devices with ...
Brum Javier - - 2011
Simultaneous measurement of pressure and diameter in blood vessels or vascular prosthesis is of great importance in cardiovascular research. Knowledge of diameter changes as response to intravascular pressure is the basis to estimate the biomechanical properties of blood vessel. In this work a new method to quantify arterial diameter based ...
Shon In-Jin - - 2011
TiCu nanopowder was produced using an electrical wire explosion method and subsequently consolidated into dense nanostuctured TiCu by a high frequency induction heated sintering method. The consolidation was accomplished by the combination of an induced current and a high mechanical pressure within two minutes. This process results in very quick ...
Eibel Bruna - - 2011
Functional electrical stimulation (FES) is a rehabilitation method that can revert alterations provoked by aging, such as reductions in functional capacity and modifications on blood pressure variability (BPV). To evaluate the training effects of FES on functional capacity and BPV in a centenarian woman. A 101-year-old woman without previous disease ...
Xu Da - - 2011
We investigated the system identification approach for potentially improved estimation of pulse transit time (PTT), a popular arterial stiffness marker. In this approach, proximal and distal arterial waveforms are measured and respectively regarded as the input and output of a system. Then, the system impulse response is identified from all ...
Weenink Robert P - - 2011
OBJECTIVE: Cerebral arterial gas embolism (CAGE) is a serious hazard in cardiovascular surgery and other invasive procedures. We used a swine model of CAGE to determine if quantitative electroencephalography (qEEG) is a useful tool in diagnosis and prognostication of CAGE. METHODS: 0.05ml/kg of air was injected into the ascending pharyngeal ...
Myrie Semone B - - 2011
Background: Impaired fetal growth and rapid postnatal growth are associated with programming of hypertension and metabolic syndrome in adulthood. Objectives: This study evaluated this phenomenon in a novel spontaneous intrauterine growth-restricted (IUGR) model in Yucatan miniature pigs. Methods: IUGR piglets (n = 6, 3 days old, 0.73 ± 0.11 kg) ...
Holey Liz A - - 2011
The purpose of this study was to measure effects of connective tissue massage (CTM) on the autonomic nervous system using thermography and physiological measurements. A repeated-measures design was used. The setting was a university laboratory. Skin temperature at the site of massage, blood pressure, heart rate, and dorsal foot temperature ...
Verberk Willem J - - 2011
BackgroundScreening for inter-arm difference (IAD) of blood pressure (BP) at each first visit is recommended by numerous guidelines whereas it is unclear whether the method by which IAD is measured has significant influence on the IAD value.MethodsA systematic review is made of the studies reporting on double-arm measurements and the ...
Croccolo Fabrizio - - 2011
In the present work binary mixtures of varying concentrations of two miscible hydrocarbons, 1,2,3,4-tetrahydronaphtalene (THN) and n-dodecane (C12), are subjected to increasing pressure up to 50 MPa in order to investigate the dependence of the so-called concentration contrast factor (CF), i.e., (∂n∕∂c)(p, T), on pressure level. The refractive index is ...
Latour Ewa - - 2011
Analysis of pedobarographical data requires geometric identification of specific anatomical areas extracted from recorded plantar pressures. This approach has led to ambiguity in measurements that may underlie the inconsistency of conclusions reported in pedobarographical studies. The goal of this study was to design a new analysis method less susceptible to ...
Rossi Rosario - - 2011
INTRODUCTION: : Endothelial dysfunction is a well-demonstrated independent predictor of cardiovascular events in hypertensive postmenopausal women. Accordingly, it is plausible that improving endothelial function could represent an adjunctive target for antihypertensive treatment. The aim of our study was to evaluate the effect of pharmacologic treatment on endothelial function in the ...
Macintyre Lisa - - 2011
Accurate measurement of the pressure delivered by medical compression products is highly desirable both in monitoring treatment and in developing new pressure inducing garments or products. There are several complications in measuring pressure at the garment/body interface and at present no ideal pressure measurement tool exists for this purpose. This ...
Peterson Ronald W - - 2011
Encapsulation within reverse micelles dissolved in low viscosity fluids offers a potential solution to the slow tumbling problem presented by large soluble macromolecules to solution NMR spectroscopy. The reduction in effective macromolecular tumbling is directly dependent upon the viscosity of the solvent. Liquid ethane is of sufficiently low viscosity at ...
Chu Shengqi - - 2011
Differential EXAFS (DiffEXAFS) is able to detect subtle atomic perturbations in the local area of the absorbing atom. Here a new method of performing DiffEXAFS experiments under the modulation of high pressure has been developed. Periodic pressure was achieved in the gasket with the help of a dynamic diamond anvil ...
Moser D - - 2011
Computational thermodynamics using density functional theory ab initio codes is a powerful tool for calculating phase diagrams. The method is usually applied at the standard pressure of p = 1 bar and where the Gibbs energy is assumed to be equal to the Helmholtz energy. In this work, we have calculated the ...
Vavourakis V - - 2011
Hemodynamic conditions in large arteries are significantly affected by the interaction of the pulsatile blood flow with the distensible arterial wall. A numerical procedure for solving the fluid-structure interaction problem encountered in cardiovascular flows is presented. We consider a patient-specific carotid bifurcation geometry, obtained from 3D reconstruction of in vivo ...
Daoud Ehab G - - 2011
Airway Pressure Release Ventilation (APRV) is inverse ratio pressure controlled intermittent mandatory ventilation. It is based on the principle of open lung approach. It has many purported advantages over conventional ventilation including alveolar recruitment, improved oxygenation, preservation of spontaneous breathing, improved hemodynamics, and potential lung protective effects. It has many ...
Lan H - - 2011
This paper presents a 3D finite element upper arm model, validated by experiments as well as clinical data, used to study the error introduced in blood pressure measurements due to variability of arm tissue mechanical properties. The model consists of three separate cylindrical parts: soft tissue, bone and brachial artery. ...
Zaleski-Ejgierd Patryk - - 2011
A wide decomposition pressure range of 132 GPa is predicted for PbH_{4} above which it emerges in very different forms compared with its group-14 congeners. This triply Born-Oppenheimer system is a nonmolecular, three-dimensional, metallic alloy, despite a prominent layered structure. A significant number of enthalpically near-degenerate structures, with exceedingly small energy ...
Hu Xiao - - 2011
Peanut protein isolate (PPI) was treated by high-pressure microfluidization (120 Peanut protein isolate (PPI) was treated by high-pressure microfluidization (40, 80, 120 and 160 MPa) and/or transglutaminase (TGase) cross-linking. It was found that individual microfluidization at 120 MPa was more effective to improve the solubility, emulsifying properties and surface hydrophobicity ...
Zenk R - - 2011
For car manufacturers, seat comfort is becoming more important in distinguishing themselves from their competitors. Therefore, many studies on participative seat comfort are carried out. In this paper, an objective assessment approach is reported which evaluates the concept of "optimal load distribution", based on the identification of a close relationship ...
Sato Hajime - - 2011
The quality of chest compression (CC) is influenced by the surface supporting the patient. The present study compared chest compression depth with and without a rigid backboard on an operating table with a pressure-distributing mattress. We hypothesized that the presence of a backboard would result in an increased depth of ...
Schizas A M P - - 2011
Background  Vector volume manometry (VVM) can be used to assess patients with fecal incontinence. The VVM may be performed using a station pull through, or an automated technique. Currently no standard technique or equipment exists to assess anal canal VVM. This study aimed to assess the different techniques to produce ...
Lamarre-Cliché Maxime - - 2011
Discordance between blood pressure (BP) measurement methods can occur and create ambiguity. New automated office BP monitors (AOBPs) are widely available, but their role is presently unclear. The objectives of this study are to quantify concordance among BP measurement methods and to define the diagnostic sensitivity, specificity, and predictive value ...
Lee Eun Joong - - 2011
Based on the optical deflection method, the resonant characteristics of a microcantilever under various pressure have been observed at room temperature to understand the pressure-dependent dissipation effect. Especially, the quality factor of the cantilever has been measured for up to fourth harmonic mode of cantilever resonance as a function of ...
Sanda Robert B - - 2011
Background: Hyperthermic Intraoperative Peritoneal Lavage (HIPL) is useful for bacterial decontamination and prevention of hypothermia during damage-control surgery (DCS). Little is known about the effect of HIPL on intra-abdominal pressure (IAP) alone or in combination with peritonitis. Aim: To determine the effects of HIPL at graded temperatures on IAP in ...
Hollow M R - - 2011
Baroreflex sensitivity (BRS) is known to be attenuated by inspiration and all the original BRS methodologies took this into account by measuring only in expiration. Spontaneous sequence analysis (SSA) is a non-invasive clinical tool widely used to estimate BRS in Man but does not take breathing into account. We have ...
Hong S S - - 2011
Ultrasonic sensors of 500 kHz frequency have been used to study the measuring of gas pressure in the range 1.33 × 10(3)-2.026 × 10(5) Pa. From the experimental data it was observed that amplitude of the transmitted ultrasound was dependent on gas pressure. The results confirm that by using appropriate ...
Schmidl Doreen - - 2011
The purpose of the present study was to investigate whether the nucleoside adenosine is involved in the regulatory processes of choroidal blood flow (ChBF) during an experimental decrease in ocular perfusion pressure (OPP). In this randomized, double-masked, placebo-controlled, two-way crossover study, 14 subjects received either intravenous adenosine or placebo on ...
Egan Patrick - - 2011
We present a method of measuring the refractive index of dry gases absolutely at 632.8 nm wavelength using a Fabry-Perot cavity with an expanded uncertainty of <3×10<sup>-9</sup> (coverage factor k=2). The main contribution to this uncertainty is how well vacuum-to-atmosphere compression effects (physical length variation) in the cavities can be corrected. ...
Soutello Ana Lúcia Soares - - 2011
This study aimed to evaluate the feasibility, acceptability, ceiling and floor effects, reliability, and convergent construct validity of the Brazilian version of the Mini Cuestionario de Calidad de Vida en la Hipertensión Arterial (MINICHAL). The study included 200 hypertensive outpatients in a university hospital and a primary healthcare unit. The ...
Bhavanani Ananda Balayogi - - 2011
Numerous scientific studies have reported beneficial physiological changes after short- and long-term yoga training. Suryanamaskar (SN) is an integral part of modern yoga training and may be performed either in a slow or rapid manner. As there are few studies on SN, we conducted this study to determine the differential ...
Erath Byron D - - 2011
A theoretical flow solution is presented for predicting the pressure distribution along the vocal fold walls arising from asymmetric flow that forms during the closing phases of speech. The resultant wall jet was analyzed using boundary layer methods in a non-inertial reference frame attached to the moving wall. A solution ...
Jain Mukul Kumar MK Department of Neuroanesthesiology, Institute of Human Behavior and Allied Sciences, Dilshad Garden, Delhi, - - 2011
Inflation and assessment of the endotracheal tube cuff pressure is often not appreciated as a critical aspect of endotracheal intubation. Appropriate endotracheal tube cuff pressure, endotracheal intubation seals the airway to prevent aspiration and provides for positive-pressure ventilation without air leak. Correlations between manual methods of assessing the pressure by ...
Tsai Andrew Sh - - 2011
This paper aims to review the current methods available for the measurement of intraocular pressure (IOP) after laser in situ keratomileusis (LASIK) for the correction of myopia. Searches were performed for studies that assessed or compared various methods of obtaining IOP after myopic LASIK. The MEDLINE database was systemically reviewed ...
Daghma D S - - 2011
The high pressure freezing (HPF) followed by freeze substitution technique has advantages over chemical fixation in the context of preserving sample ultrastructure. However, when HPF is applied to cultured pollen grains, the large intercellular spaces present lead to a poor level of ultrastructure preservation. We report here that the mixing ...
Manakov Andrey Yu - - 2011
Experimental data on the pressure dependence of unit cell parameters for the gas hydrates of ethane (cubic structure I, pressure range 0-2 GPa), xenon (cubic structure I, pressure range 0-1.5 GPa) and the double hydrate of tetrahydrofuran+xenon (cubic structure II, pressure range 0-3 GPa) are presented. Approximation of the data using the cubic ...
Møller Niels Christian - - 2011
This study investigated the effect of commuter cycling on cardiorespiratory fitness in men and women. Secondary outcomes included body fat and blood pressure measurements. In February 2009, 48 volunteers from the Island of Funen, Denmark were randomly assigned to either "no change in lifestyle" or to "minimum 20 minutes of ...
Tsevdou M S - - 2011
High Hydrostatic Pressure (HP) processing has been suggested as an alternative method to improve textural attributes of dairy products. Since, the global market seeks improved functional foods, it is important to investigate whether HP processing can be applied to fermented dairy probiotic products. The inactivation kinetics of Bifidobacterium spp. in ...
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