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Results 451 - 500 of 2073
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Kamiya Atsunori - - 2011
Although the dynamic characteristics of the baroreflex system have been described by baroreflex transfer functions obtained from open-loop analysis, the predictability of time-series output dynamics from input signals, which should confirm the accuracy of system identification, remains to be elucidated. Moreover, despite theoretical concerns over closed-loop system identification, the accuracy ...
Leblanc Nicole L NL Department of Medical Sciences, University of Wisconsin, Madison, WI 53706, - - 2011
To characterize ocular findings in hypertensive dogs, determine prevalence of hypertension in dogs with ocular disease suggestive of hypertension, and examine possible relationships between degree of hypertension and ocular disease. Retrospective case series. 65 dogs initially referred for blood pressure measurement (n = 22), ophthalmic examination (25), or both (18). ...
Wu Chueh-Yu - - 2011
This paper reports a novel pressure sensor with an electrical readout based on electrofluidic circuits constructed by ionic liquid (IL)-filled microfluidic channels. The developed pressure sensor can be seamlessly fabricated into polydimethylsiloxane (PDMS) microfluidic systems using the well-developed multilayer soft lithography (MSL) technique without additional assembly or sophisticated cleanroom microfabrication ...
Chatterjee Arya - - 2011
Using the disjoining pressure concept in a seminal paper, Derjaguin, Nerpin and Churaev demonstrated that isothermal liquid flow in a very thin film on the walls of a capillary tube enhances the rate of evaporation of moisture by several times. The objective of this review is to present the evolution ...
Ghai Gaurav - - 2011
Traditional metal cans and glass jars have been the mainstay in thermally processed canned foods for more than a century, but are now sharing shelf space with increasingly popular flexible pouches and semi-rigid trays. These flexible packages lack the strength of metal cans and glass jars, and need greater control ...
Cardoso Inês - - 2011
The importance of establishing the ecological quality of estuarine systems has been widely acknowledged and led to the development of several fish community-based multimetric indices. Nevertheless, a question rose about the accuracy of these tools when natural disturbance is acting upon the organization of the systems' communities. Four multimetric indices ...
Bernhard Andreas M - - 2011
Aqueous urea solution is widely used as reducing agent in the selective catalytic reduction of NO(x) (SCR). Because reports of urea vapor at atmospheric pressure are rare, gaseous urea is usually neglected in computational models used for designing SCR systems. In this study, urea evaporation was investigated under flow reactor ...
Shi Wei - - 2011
Significant progress in the development of implantable ventricular assist devices using continuous-flow blood pumps has been made recently. However, a control method has not been established. The blood pressure in the inflow cannula (inlet pressure) is one of the candidates for performing an adequate control. This could also provide important ...
Stouby Anna - - 2011
Prolonged air leakage is common after lung resection. We observed that during deep inspiration some patients were able to empty the water-seal of commercial chest drainage systems and retract air back into the chest tube, which subsequently escaped during the following expiration, mimicking "true" air leakage. This led us to ...
Choi In-Mook - - 2011
It is becoming more important to measure the pressure in high temperature environments in many industrial fields. However, there is no appropriate evaluation system and compensation method for high temperature pressure sensors since most pressure standards have been established at room temperature. In order to evaluate the high temperature pressure ...
Al Khaburi J - - 2011
Multi-component medical compression bandages are widely used to treat venous leg ulcers. The sub-bandage interface pressures induced by individual components of the multi-component compression bandage systems are not always simply additive. Current models to explain compression bandage performance do not take account of the increase in leg circumference when each ...
Neuman Michael - - 2011
Blood pressure is the last of the four physiologic variables known as clinical vital signs that we will consider in this tutorial series. In essence, pressure and heart rate are the two vital signs that evaluate the cardiovascular system. Although pressure is important throughout the cardiovascular system, the vital sign ...
Kim Moon Young - - 2011
Further histological subclassification of cirrhosis may be useful because of heterogeneity of severity within cirrhosis. We aimed to determine the relationship between histological subclassification and clinical stage of cirrhosis as well as grade of portal hypertension. One hundred-twenty-three biopsy-proven cirrhosis patients, whose clinical stage of cirrhosis and hepatic venous pressure ...
Maroni Beatrice - - 2011
The effect of chemical and hydrostatic pressure has been studied systematically in a selected system belonging to the 1111 family of iron pnictide high-temperature superconductors. The results show a surprising similarity between the trend of critical temperature vs hydrostatic pressure for isoelectronic samples with different rare earths (RE) on the ...
Shiry L J - - 2011
INTRODUCTION: The high pressure baroreceptor reflex rapidly buffers changes in systemic arterial pressure in response to postural changes, altered gravitational conditions, diseases, and pharmacological agents. Drug-induced exaggeration of changes in heart rate and in systemic arterial pressure is a leading cause of adverse events and of patients terminating use of ...
Arellano-Orden Victoria - - 2011
Important differences with respect to gender exist in the prognosis and mortality of traumatic brain injury (TBI) patients. The objective of this study was to assess the role of gender as an independent factor in cerebral oxygenation variations following red blood cell transfusion (RBCT). This retrospective analysis of a prospective ...
Rietveld Ivo B - - 2011
In 1981, Jacques, Collet, and Wilen already put forward the idea to use pressure to influence equilibria in binary enantiomer systems in analogy with temperature (Jacques et al. Enantiomers, Racemates and Resolutions; John Wiley & Sons: New York, 1981). Whereas temperature is used routinely to study phase equilibria, pressure is ...
Abraham William T - - 2011
Implantable hemodynamic monitoring to guide heart failure (HF) therapy is a promising area of active research. The goal of this investigation was to evaluate the safety and technical performance of a novel wireless pulmonary artery pressure monitoring system in 17 patients with symptomatic HF. The monitoring system consists of a ...
Kristo David - - 2011
BACKGROUND: Airborne particulate matter may induce health risk with inhalation. Special concerns exist for deployed military personnel with inhaled particulate matter in desert environments. Continuous positive airway pressure (CPAP) used in obstructive sleep apnea may facilitate inhalation of particulate matter. We evaluated the ability of commercial CPAP filter systems to ...
Siragy Helmy M - - 2011
Inhibition of the renin-angiotensin system has been a highly successful therapeutic approach for the prevention of hypertension-related end organ damage. Angiotensin converting enzyme inhibitors and angiotensin II receptor blockers lower blood pressure and reduce morbidity and mortality in patients with cardiovascular and kidney disease. However, progression to end-stage disease remains ...
Oba Koji - - 2011
Although intention-to-treat analysis is a standard approach, additional supplemental analyses are often required to evaluate the biological relationship among interventions, intermediates, and outcomes. Therefore, we need to evaluate whether the effect of an intervention on a particular outcome is mediated by a hypothesized intermediate variable. To evaluate the size of ...
Takasaki Kenji - - 2011
Objective. To evaluate the effect of effortful swallow on pharyngeal pressure while swallowing saliva and water using a novel high-resolution manometry (HRM) system. Study Design. Case series with planned data collection. Setting. Nagasaki University Hospital. Subjects and Methods. Eighteen asymptomatic Japanese adult volunteers were studied. A solid-state HRM assembly with ...
Krenke RafaƂ - - 2011
Background: Measurement of intrapleural pressure is useful during various pleural procedures. However, a pleural manometer is rarely available. Objectives: The aim of this study was to (1) construct an electronic pleural manometer, (2) assess the accuracy of the measurements done with the new device, (3) calculate the costs of the ...
Lee Jung-Hoon - - 2011
Objective: The objective of this study was to determine the changes in left and right gluteal pressures and posterior inclination angles between the anterior superior iliac spine (ASIS) and posterior superior iliac spine (PSIS) on both sides after continuous cross-legged sitting. Methods and participants: Fourteen young adults (nine males and ...
Mahler Simon A - - 2011
Studies have shown that vein size is an important predictor of successful ultrasound-guided vascular access. The objective of this study is to evaluate maneuvers designed to increase basilic vein size, which could be used to facilitate ultrasound-guided peripheral intravenous access (USGPIV) in the Emergency Department (ED) setting. This was a ...
Vailionis Arturas - - 2011
At extreme pressures and temperatures, such as those inside planets and stars, common materials form new dense phases with compacted atomic arrangements and unusual physical properties. The synthesis and study of new phases of matter at pressures above 100 GPa and temperatures above 10(4) K--warm dense matter--may reveal the functional ...
Lei Xiao-Wen - - 2011
In this paper, a theoretical analysis of the radial breathing mode (RBM) of carbon nanotubes (CNTs) subjected to axial pressure is presented based on an elastic continuum model. Single-walled carbon nanotubes (SWCNTs) are described as an individual elastic shell and double-walled carbon nanotubes (DWCNTs) are considered to be two shells ...
Pick Donald Lowell - - 2011
Tisseel® is used to control minor bleeding during laparoscopic procedures. The DuploSpray MIS™ spray system allows thin, even application over a larger surface area. We use sprayed Tisseel as the sole agent to control hemorrhage and seal the renal collecting system after severe porcine laparoscopic partial nephrectomy. We performed staged ...
Haynes Susan E - - 2011
ABSTRACT Background: Intravascular ultrasound (IVUS) measures prognostically important pulsatile flow indexes in patients with pulmonary hypertension (PH). IVUS catheters traditionally require a guiding catheter for placement which can impact hemodynamics in small infants because the guiding catheter renders the atrioventricular valve incompetent. Methods: Domestic swine (1.4-2.2 kg) were raised in ...
Sonenblum Sharon Eve - - 2011
To characterise the use of tilt-in-space systems and to form recommendations for tilt prescription and training based upon its use. Wheelchair occupancy and seat position of 45 full-time power wheelchair users were monitored for 1-2 weeks using an accelerometer, occupancy switch and data logger. Demographics, pressure ulcer history, functional and ...
Matthews Peter B - - 2011
Pulmonary autograft dilatation requiring reoperation is an Achilles' heel of the Ross procedure, as exposure to systemic pressure increases autograft wall stress, which may in turn lead to tissue remodeling and aneurysmal pathology. However, the magnitude of autograft wall stress with the Ross procedure is unknown. The study aim was ...
Tympa Aliki - - 2011
ABSTRACT Background: Currently, albumin dialysis is the most widely used nonbiological liver support system. We hypothesized that direct peritoneal albumin exposure in the peritoneal cavity would stabilize blood flow and prevent liver and brain injury, in the same way that had previously been seen with extracorporeal albumin dialysis systems. Materials ...
Krampe J - - 2011
Aeration of activated sludge is a critical treatment step for the operation of activated sludge plants. To achieve a cost effective treatment process, assessing and benchmarking of aeration system performance are important measures. A simple means of gauging the relative condition of a fine bubble diffused aeration system is to ...
Qiao Qing - - 2011
One laboratory-based and two non-laboratory-based models with and without blood pressure measures are developed based on data of 14815 men and 16617 women aged 25-64 years. During the followup 1134 men and 566 women developed coronary heart disease (CHD). The area under the receiver operating characteristic curve (95% CI) for ...
Yamashita Hiroshi - - 2011
The pressurized dissolution method is often used for microbubble generation. However, the main disadvantage of this method is that a large amount of energy (more than 0.3 MPa) is required to generate many microbubbles, each of which have a diameter of several dozen μm. To overcome this problem, we investigated ...
Shahgholian Nahid - - 2011
One of the most prevalent side effects of hemodialysis is intradialytic hypotension and its symptoms. Using sodium profiles 3 and ultra filtration profile 3 and cold dialysate are the ways to overcome this problem. Since none of these methods could control this complication lonely, this study was done to investigate ...
Ogbuehi Kelechi C - - 2011
The purpose of this study was to evaluate the precision of intraocular pressure measurements obtained by PT100 noncontact tonometry in a handheld and slit lamp-mounted position in comparison with that of Goldmann applanation tonometry in healthy young adults. Sixty eyes from 60 subjects (30 men and 30 women) aged 22 ...
Quinn Mark Kenneth - - 2011
There are numerous ways in which pressure-sensitive paint can be applied to a surface. The choice of substrate and application method can greatly affect the results obtained. The current study examines the different methods of applying pressure-sensitive paint to a surface. One polymer-based and two porous substrates (anodized aluminum and ...
Wang Jian-Sheng - - 2011
The strength of the cement-bone interface in hip arthroplasty is strongly related to cement penetration into the bone. A modified femoral pressuriser has been investigated, designed for closer fitting into the femoral opening to generate higher and more constant cement pressure compared to a commercial (conventional) design. Femoral cementation was ...
van Eps Carolyn L - - 2011
Nightly extended hours hemodialysis may improve left ventricular hypertrophy and function and endothelial function but presents problems of sustainability and increased cost. The effect of alternate nightly home hemodialysis (NHD) on cardiovascular structure and function is not known. Sixty-three patients on standard hemodialysis (SHD: 3.5-6 hours/session, 3-5 sessions weekly) converted ...
Hirata Raquel P - - 2011
Obstructive sleep apnea (OSA) is a respiratory disease characterized by the collapse of the extrathoracic airway and has important social implications related to accidents and cardiovascular risk. The main objective of the present study was to investigate whether the drop in expiratory flow and the volume expired in 0.2 s ...
Wang Dong - - 2011
Several healthful dietary patterns appear to be effective at lowering blood pressure and preventing hypertension. However, the relationship between dietary patterns and hypertension among a representative Chinese population sample is unclear. A nationally representative sample of 23 671 participants aged 18-59 years were recruited by the 2002 China National Nutrition ...
Kurth Florian - - 2011
Electrical Impedance measurements can be used to estimate the content of intra-thoracic air and thereby give information on pulmonary ventilation. Conventional Impedance measurements mainly indicate relative changes, but no information concerning air-volume is given. The study was performed to test whether a 3-point-calibration with known tidal volumes (VT) during conventional ...
Kapoor Dheeraj - - 2011
Rapid fluid administration is often required for resuscitation when patients are admitted in emergency department with hypovolemic shock or excessive blood loss. Various methods have been described earlier to increase the fluid administration speed. Larger vein size, larger bore cannula, height of fluid, pressure over fluid bottle etc. are some ...
Johnson Jennifer A - - 2011
Right ventricular (RV) dysfunction is a complication of pulmonary hypertension and portends a poor prognosis. Pharmacological therapies targeting RV function in pulmonary hypertension may reduce symptoms, improve hemodynamics, and potentially increase survival. We hypothesize that recombinant human angiotensin-converting enzyme 2 (rhACE2) will improve RV function in a pressure overload model. ...
Kostic Peter - - 2011
Protocols using high levels of positive end-expiratory pressure (PEEP) in combination with low tidal volumes have been shown to reduce mortality in patients with severe acute respiratory distress syndrome (ARDS). However, the optimal method for setting PEEP is yet to be defined. It has been shown that respiratory system reactance ...
Ejike Chukwunonso E C C - - 2011
The age-, gender-, and height-percentile requirements of the 'gold-standard' for the diagnosis of (pre)hypertension in adolescents make it time-consuming for clinicians and difficult-to-use by non-professionals. Simplified diagnostic tools are therefore needed. The use of blood pressure-to-height ratio (BPHR)--systolic BPHR (SBPHR) and diastolic BPHR (DBPHR)--has been reported in Han adolescents, but ...
Ohishi Junichi - - 2011
The forced oscillation technique (FOT) is a simple method for assessing the oscillatory mechanics of the respiratory system. The oscillatory properties, respiratory system resistance (Rrs) and reactance (Xrs), are calculated from the oscillatory pressure/flow relationship. Although the FOT has been a well-established technique, some detailed experimental conditions would be different ...
De Las Heras Javier - - 2011
To examine the cross-sectional relationship between blood pressure (BP) and (1) in vivo insulin sensitivity (IS) and (2) circulating adiponectin levels in overweight adolescents, and to determine if these relationships are driven by adiposity. Sixty-five white pubertal overweight adolescents underwent a hyperinsulinemic-euglycemic clamp to measure IS. Body composition and abdominal ...
Faes Luca - - 2011
The physiological mechanisms related to cardio-vascular (CV), cardio-pulmonary (CP), and vasculo-pulmonary (VP) regulation may be probed through multivariate time series analysis tools. This study applied an information domain approach for the evaluation of non-linear causality to the beat-to-beat variability series of heart period (t), systolic arterial pressure (s), and respiration ...
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