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Vieira Evandro Pires - - 2011
The purpose of this study was to evaluate the torsional behavior of rotary ProTaper Universal instruments after multiple clinical uses with and without lateral pressure motion. Thirty sets of ProTaper Universal instruments were divided into 3 groups (n = 10): control group (CG) involving new instruments tested in torsion on ...
Cha Kyoung Je - - 2011
In this paper, we propose a novel portable and disposable pressure pump using a porous polydimethylsiloxane (PDMS) sponge and demonstrate its application to a microfluidic lab-on-a-chip. The porous PDMS sponge was simply fabricated by a sugar leaching technique based on capillary suction of pre-cured PDMS into lumps of sugar, thereby ...
Di Noto Vito - - 2011
Broadband Electric Spectroscopy (BES) is a technique that shows promise in studying the interactions of dense or supercritical gases with polymers, particularly with respect to chain mobility. Polymers that are treated with dense gases show a reduction in the viscosity, glass transition and melting temperature. A high pressure cell for ...
Kottner Jan - - 2011
BACKGROUND: Pressure ulcer risk assessment using an age-appropriate, valid and reliable tool is recommended for clinical paediatric practice. OBJECTIVES: (1) What PU risk scales for children currently exist? (2) What is the diagnostic accuracy of their scores? (3) Are the scores reliable and what is the degree of agreement? (4) ...
Nakamoto Y - - 2011
Nano-polycrystalline diamonds (NPDs) consist of nanosized diamond grains oriented in random directions. They have high toughness and isotropic mechanical properties. A NPD has neither the cleavage feature nor the anisotropy of hardness peculiar to single-crystal diamonds. Therefore, it is thought to be useful as a diamond anvil. We previously reported ...
Gesche Heiko - - 2011
Pulse transit time (PTT) and pulse wave velocity (PWV), respectively, were shown to have a correlation with systolic blood pressure (SBP) and have been reported to be suitable for indirect BP measurements. The aim of this study was to create a function between SBP and PWV, and to test its ...
Merkel Carlo - - 2011
Portal hypertension is key to the natural history of cirrhosis and the standard way to assess it is the hepatic venous pressure gradient. Hepatic venous pressure gradient is a strong predictor of variceal bleeding/survival and is the only suitable tool to assess the response of portal hypertension to medical treatment. ...
Cothran Amber - - 2011
High-pressure has been established as an effective technique for refolding proteins at high concentrations. In this study, high hydrostatic pressure (1-3 kbar) was utilized to refold a homodimeric protein from inclusion bodies and the process was evaluated for large-scale manufacturing feasibility. This research focused on increasing protein concentration while maximizing ...
Tateiwa Naoyuki - - 2011
A miniature opposed-anvil high-pressure cell has been developed for magnetic measurement in a commercial superconducting quantum interference device magnetometer. Non-magnetic anvils made of composite ceramic material were used to generate high-pressure with a Cu-Be gasket. We have examined anvils with different culet sizes (1.8, 1.6, 1.4, 1.2, 1.0, 0.8, and ...
Rosenberg Jamie B - - 2011
Non-invasive measurement of intracranial pressure can be invaluable in the management of critically ill patients. We performed a comprehensive review of the literature to evaluate the different methods of measuring intracranial pressure. Several methods have been employed to estimate intracranial pressure, including computed tomography, magnetic resonance imaging, transcranial Doppler sonography, ...
Pickard Amelia - - 2011
Capillary refill time (CRT) is widely used by health care workers as part of the rapid, structured cardiopulmonary assessment of critically ill patients. Measurement involves the visual inspection of blood returning to distal capillaries after they have been emptied by pressure. It is hypothesized that CRT is a simple measure ...
Lee Yong Gi - - 2011
PURPOSE.: This study aimed to compare central corneal thickness (CCT) measurement by Tonopachy to that by Pentacam and ultrasound pachymetry, and intraocular pressure (IOP) measurement to that by Goldmann applanation tonometry (GAT). The reproducibility of CCT and IOP measurements by Tonopachy was also evaluated. METHODS.: In 104 eyes of 104 ...
Gözke Gözde - - 2011
Downstream processing of chitosan requires several technological steps that contribute to the total production costs. Precipitation and especially evaporation are energy-consuming processes, resulting in higher costs and limiting industrial scale production. This study investigated the filtration kinetics of chitosan derived from cell walls of fungi and from exoskeletons of arthropods ...
Finer Neil N - - 2011
INTRODUCTION: The ability of T-piece resuscitators to deliver consistent peak inspiratory pressure (PIP) and positive end expiratory pressure (PEEP) during real and simulated neonatal resuscitation has been well described. The Neopuff (Fisher & Paykel Healthcare, Auckland, New Zealand) has been the device used for nearly all of these comparisons. METHODS: ...
Warden Kara F - - 2011
BACKGROUND:: The management of idiopathic intracranial hypertension (IIH) depends on a reliable assessment of intracranial pressure (ICP), particularly when visual function measures or ophthalmoscopic indicators are confusing and when invasive surgical procedures are being considered. Although ICP monitoring has been widely applied in many neurologic conditions as a more reliable ...
Moretti R - - 2011
The rapid diagnosis of intracranial hypertension is urgently needed for therapeutic reasons in various clinical settings. This can rarely be achieved without invasive procedures such as intracranial pressure (ICP) monitoring or neuroimaging. The optic nerve is surrounded by cerebrospinal fluid (CSF) and dura mater, which forms the optic nerve sheath ...
Sit Arthur J - - 2011
Episcleral venous pressure (EVP) is an important determinant of intraocular pressure (IOP) and can be estimated by the pressure required to compress an episcleral vein. However, the lack of objective measurement endpoints makes EVP measurements in humans uncertain. To address this issue, we developed a new method to measure EVP ...
Welzel Oliver P - - 2011
Multiprobe high pressure measurements require electrical leads in the sample chamber. Compared to conventional wire-based techniques, metallic tracks patterned onto the anvil surface improve reliability and ease of use, and enable novel and more demanding measurements under high pressure. We have developed new anvil designs based on sputter-deposited tracks on ...
Criée C P - - 2011
Body plethysmography allows to assess functional residual capacity (FRC(pleth)) and specific airway resistance (sRaw) as primary measures. In combination with deep expirations and inspirations, total lung capacity (TLC) and residual volume (RV) can be determined. Airway resistance (Raw) is calculated as the ratio of sRaw to FRC(pleth). Raw is a ...
Smulyan Harold - - 2011
Measurement of the arterial blood pressure (BP) is a time-honored, vital piece of medical information whose accuracy is seldom questioned. This review identifies the unappreciated weakness of the early validation data that compared the cuff to intra-arterial BP's. Unfortunately, the inaccuracy of the auscultatory systolic (SBP) and diastolic (DBP) measurements ...
Jóhannesson Gauti - - 2011
Purpose:  In recent years, Applanation Resonance Tonometry (ART) has been suggested for intraocular pressure (IOP) measurements. The manual version of ART (ART(manual) ) has been further developed, and to improve usability, an automatic servo-controlled prototype (ART(servo) ) has been proposed. The aim of this study was to assess the limits ...
Thabut Dominique - - 2011
Severe portal hypertension is responsible for complications and death. Although measurement of the hepatic venous pressure gradient is the most accurate method for evaluating the presence and severity of portal hypertension, this technique is considered invasive and is not routinely performed in all centers. Several noninvasive techniques have been proposed ...
Erdem Emre - - 2011
Standard validation protocols are objective guides for healthcare providers, physicians, and patients. The purpose of this study was to test validation of the Medisana MTP Plus upper arm blood pressure (BP) measuring monitor for self-measurement according to the European Society of Hypertension International Protocol (ESH-IP2) in adults. The Medisana MTP ...
Collette Mathieu - - 2011
The stiffness of large arteries has an important role in cardiovascular hemodynamics. Aortic stiffness (AoStiff) can be assessed non-invasively with regional and local methods. In this paper, we compared these two techniques for evaluating AoStiff. Our subjects comprised of 118 consecutive patients (85 men, mean age: 49±14 years). We evaluated ...
Cooke Andrew - - 2011
Although it is well established that performance is influenced by competitive pressure, our understanding of the mechanisms which underlie the pressure-performance relationship is limited. The current experiment examined mediators of the relationship between competitive pressure and motor skill performance of experts. Psychological, physiological, and kinematic responses to three levels of ...
Chio Shiu-Shin - - 2011
Listening to Korotkoff sounds (K-sounds) to determine systolic and diastolic blood pressure (BP) has been the standard for noninvasive BP measurement in medical practices for nearly 100 years. It is the essential tool used for evaluation and assessment of patients with hypertension and risks of cardiovascular diseases (CVD) by physicians ...
Pataky Todd Colin - - 2011
PURPOSE:: The purposes of this study were: (i) to develop a 3D interactive visualization tool for exploring plantar pressure time series and spatiotemporal statistical volumes, and (ii) to demonstrate the benefits of volumetric analyses using various running and walking datasets. METHODS:: A data exploration tool was developed in Python using ...
Munsterman Amelia S - - 2011
Objective - To develop an indirect method for measurement of intraabdominal pressures in the standing horse using measurement of gastric pressures as a less invasive technique, and to compare this method with direct intraabdominal pressures obtained from the peritoneal cavity. Design - Prospective, experimental study. Setting - University-based equine research ...
Borja Angel - - 2011
In recent times many benthic indices have been proposed to assess the ecological quality of marine waters worldwide. In this study we compared single metrics and multi-metric methods to assess coastal and transitional benthic status along human pressure gradients in five distinct environments across Europe: Varna bay and lake (Bulgaria), ...
Serumaga Brian - - 2011
To assess the impact of a pay for performance incentive on quality of care and outcomes among UK patients with hypertension in primary care. Interrupted time series. The Health Improvement Network (THIN) database, United Kingdom. 470 725 patients with hypertension diagnosed between January 2000 and August 2007. The UK pay for ...
Stevens Michael Charles MC School of Information Technology and Electrical Engineering, University of Queensland, Brisbane, Australia. - - 2011
A physiological control system was developed for a rotary left ventricular assist device (LVAD) in which the target pump flow rate (LVADQ) was set as a function of left atrial pressure (LAP), mimicking the Frank-Starling mechanism. The control strategy was implemented using linear PID control and was evaluated in a ...
Wheeler Jason W JW Sandia National Laboratories, Albuquerque, NM87185, USA. - - 2011
The ability to chronically monitor pressure at the prosthetic socket/residual limb interface could provide important data to the research and clinical communities. With this application in mind, we describe a novel type of sensor which consists of a MEMS pressure sensor and custom electronics packaged in a fluid-filled bubble. The ...
Ogawa M M Graduate School of Natural Science and Engineering, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan. - - 2011
The concept of tailored bioinstrumentation using rapid prototyping and three-dimensional CAD (3D-CAD) was proposed. This concept is to make individually designed and fabricated sensor unit to attach human body. Within the proposed concept, cuff-units for continuous blood pressure measurement were individually designed using 3D-CAD and fabricated automatically. As the result, ...
Sepúlveda A T AT Institute for Polymers and Nanocomposites/I3N, University of Minho, 4800-058 Guimarães, Portugal. - - 2011
A new approach for the design and fabrication of a highly flexible blood pressure sensor is introduced in this paper. The goal is to measure the pressure within an aneurysm sac for post-endovascular aneurysms repair (EVAR) surveillance. Biocompatible polydimethylsiloxane (PDMS) membranes with embedded aligned carbon nanotubes (CNTs) are used to ...
Voss A A Department of Medical Engineering and Biotechnology, University of Applied Sciences Jena, Carl-Zeiss-Promenade 2, 07745 Jena, Germany. voss@ - - 2011
Due to recent advances in technology extensive cardiovascular monitoring is widely introduced today. An essential component of cardiovascular monitoring is the analysis of several biosignals as electrocardiogram, blood pressure and other vital signs. This manuscript provides an overview about several application fields of cardiovascular monitoring with the main focus on ...
De Rossi S M M SM The BioRobotics Institute, Scuola Superiore Sant’Anna, viale Rinaldo Piaggio 34, 56025 Pontedera, Pi, Italy. - - 2011
In this work, we present the development of an in-shoe device to monitor plantar pressure distribution for gait analysis. The device consists in a matrix of 64 sensitive elements, integrated with in-shoe electronics and battery which provide an high-frequency data acquisition, wireless transmission and an average autonomy of 7 hours ...
Lindeboom R E F - - 2011
Conventional anaerobic digestion is a widely applied technology to produce biogas from organic wastes and residues. The biogas calorific value depends on the CH, content which generally ranges between 55 and 65%. Biogas upgrading to so-called 'green gas', with natural gas quality, generally proceeds with add-on technologies, applicable only for ...
Childs Paul - - 2010
.We measured the hydrostatic pressure dependence of the birefringence and birefringent dispersion of a Sagnac interferometric sensor incorporating a length of highly birefringent photonic crystal fiber using Fourier analysis. Sensitivity of both the phase and chirp spectra to hydrostatic pressure is demonstrated. Using this analysis, phase-based measurements showed a good ...
Ito Ken - - 2010
PURPOSE: The purpose of this study was threefold. We sought to compare the intraocular pressure (IOP) measured by dynamic contour tonometry (DCT) with that measured by Goldmann applanation tonometry (GAT) and noncontact tonometry (NCT). We also examined the influence of central corneal thickness (CCT) and corneal curvature radius (CCR) on ...
Benetos Athanase - - 2010
The elderly blood pressure paradigm reflects all of the demographic, technological and therapeutic changes over the past 20-30 years that make it now possible to propose a more integrative approach of 'hypertension'. The aim of the present review was to address what does measured blood pressure really mean and what ...
Flo Kari - - 2010
OBJECTIVE:: To describe a new method for measuring uterine vascular resistance (R(uta)), establish longitudinal reference ranges and explore the relationship between uterine artery (UtA) Doppler indices and R(uta). METHODS:: Longitudinal study of 53 low-risk pregnancies. Doppler ultrasonography was used to measure UtA velocities and the pulsatility index (PI), resistance index ...
Martin Bryn A - - 2010
Full explanation for the pathogenesis of syringomyelia (SM), a neuropathology characterized by the formation of a cystic cavity (syrinx) in the spinal cord (SC), has not yet been provided. It has been hypothesized that abnormal cerebrospinal fluid (CSF) pressure, caused by subarachnoid space (SAS) flow blockage (stenosis), is an underlying ...
Rossiter F - - 2010
A 32-year-old woman presented subacutely with headache, neck pain and vomiting. There was haemorrhagic papilloedema and bilateral sixth nerve palsies, but no localising signs. MRI of the brain was normal and there was no evidence of venous sinus thrombosis. Lumbar puncture revealed an opening pressure of 39 cm water with 277 ...
Kobayashi-Torii Mikako - - 2011
The concentration of calcium in the cerebrospinal fluid (CSF) affects systemic blood pressure; an increase in calcium concentration lowers blood pressure, whereas a decrease raises it. Although this phenomenon has been known for more than 50 years, the precise mechanism is not completely understood. We examined whether the extracellular calcium-sensing ...
Qvarlander Sara - - 2010
The amplitude of cardiac-related pulsations in intracranial pressure has recently been suggested as useful for selecting patients for shunt surgery in hydrocephalus. To better understand how shunting affects these pulsations, we aim to model the relationship between mean pressure and pulsation amplitude in a wide range, including low pressures typically ...
Hamilton Roy - - 2010
To determine the impact of cortical Alzheimer disease pathology on shunt responsiveness in individuals treated for idiopathic normal pressure hydrocephalus (iNPH), 37 patients clinically diagnosed with iNPH participated in a prospective study in which performance on neurologic, psychometric, and gait measures before and 4 months after shunting was correlated with ...
Sahu Dinesh D Pain Fellowship (IASP), Divisional Medical Officer, WR, Mumbai, - - 2010
Most common method for measuring blood pressure is palpatory but only systolic pressure can be measured with this method. In this study we are describing palpatory method of measuring diastolic blood pressure as well. PATIENTS #ENTITYSTARTX00026; We have studied in 200 patients and compared systolic as well as diastolic blood ...
Czosnyka Z Z Neurosurgical Unit, Department of Clinical Neurosciences, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK. - - 2011
Cerebrospinal fluid (CSF) pressure-volume compensation may change over time as part of normal ageing, where the resistance to CSF outflow increases and the formation of CSF decreases with age. Is CSF compensation dependent on duration of symptoms in idiopathic normal pressure hydrocephalus (iNPH)? We investigated 92 patients presenting with iNPH. ...
Elliott N S J - - 2011
Fluid transport in syringomyelia has remained enigmatic ever since the disease was first identified some three centuries ago. However, accumulating evidence in the last decade from animal studies implicates arterial pulsations in syrinx formation. In particular, it has been suggested that a phase difference between the pressure pulse in the ...
Sundström Nina - - 2010
There are several infusion methods available to estimate the outflow conductance (Cout) or outflow resistance (Rout=1/Cout) of the CSF system. It has been stated that for unknown reasons, the bolus infusion method estimates a higher C(out) than steady-state infusion methods. The aim of this study was to compare different infusion ...
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