Search Results
Results 551 - 600 of 1273
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De Paoli A G - - 2002
OBJECTIVE: To compare the resistance in vitro of different devices used for the delivery of nasal continuous positive airway pressure (NCPAP) in neonates. DESIGN: Flows of 4-8 litres/min were passed through a selection of neonatal NCPAP devices (single prong, Duotube, Argyle prong, Hudson prong, Infant Flow Driver), and the resultant ...
Braam Richard L - - 2002
The accuracy of the Welch Allyn Vital Signs Monitor, a compact device for the oscillometric measurement of blood pressure, was determined according to the British Hypertension Society protocol. The monitor achieved a grade C for diastolic and a grade D for systolic blood pressure. The device is suitable for monitoring ...
Smith Tony - - 2002
Cardiac arrest survival rates remain low despite increased access to advanced cardiac life support. Survival from cardiac arrest is, at least in part, related to the perfusion pressures and blood flow achieved during cardiopulmonary resuscitation (CPR). A number of alternative CPR devices have been developed that aim to improve the ...
Németh Zsófia - - 2002
BACKGROUND: The validation of ambulatory blood pressure monitoring devices is necessary to obtain information on their accuracy. The objective of the present study was to evaluate the accuracy of the Tensioday oscillometric ambulatory blood pressure monitor according to the protocols of the British Hypertension Society and the Association for the ...
Wingfield David - - 2002
BACKGROUND: Terminal digit and single-number preference may produce inaccuracy and biased results when measuring blood pressure. We describe these preferences in the Syst-Eur randomized placebo-controlled trial of the treatment of isolated systolic hypertension and describe how we sought to eliminate these problems. METHODS: The Data Monitoring Committee of the trial ...
Hug M I - - 2002
Using 10 different infusion bag pressure pumps, indicated manometer pressures were compared with measured infusion pressures proximal to the flow-regulating device in an in vitro experiment. Flow rates delivered through the flow-regulating device were gravimetrically measured at different monitored pressure levels. Significant differences were found between manometer and measured infusion ...
Seifer Colette M - - 2002
Monitoring devices are an important adjunct to the clinical assessment of patients who experience falls. The use of these devices should be guided by the clinical history, a physical assessment, and routine investigations. Quantitative measures of postural sway should be used in conjunction with clinical measures to provide a more ...
Lewis Jacqueline E - - 2002
Automated devices are widely available in the community for people to measure their blood pressure. We assessed the accuracy and reproducibility of a brand of community-based automated device against the standard mercury sphygmomanometer. Same-arm pairs of blood pressure readings were obtained with the Vita-Stat 90550 automated device, a sphygmomanometer and ...
Nelson Robert M - - 2002
BACKGROUND: New software (SuperSTAT(R) algorithm) with enhancements aimed at shorter determination times was developed for a non-invasive blood pressure (NIBP) device and a clinical evaluation was conducted to verify accuracy. OBJECTIVE: To determine the accuracy of the new algorithm according to ANSI/AAMI SP10-1992 and SP10A-1996 American National Standard for Electronic ...
Verkerke Gijsbertus Jacob - - 2002
Rehabilitation of laryngectomees has been furthered by the introduction of heat and moisture exchange (HME) filters, placed over a tracheostoma or on a tracheostoma valve (TSV). The airflow resistance of HME filters is an important factor with regard to the comfort of the patient. The goal of this study was ...
Kikuya Masahiro - - 2002
OBJECT: Self-measurement of blood pressure (BP) might offer some advantages in diagnosis and therapeutic evaluation and in patient management of hypertension. Recently, wrist-cuff devices for self-measurement of BP have gained more than one-third of the world market share. In the present study, we validated wrist-cuff devices and compared the results ...
Tomotake Yoritoki - - 2002
The purpose of the present study was to evaluate the difference in stress transfer between titanium (Ti) and hydroxyapatite (HA) by the measurement of bone marrow pressure using a catheter pressure transducer. Ti and HA implants were inserted in the tibiae of rabbits. A hole of 1 mm in diameter ...
Dunn Robert W - - 2002
The design and operation of a proof-of-principle rectangular He-Ne ring laser resonator with a cavity perimeter of 77.0 m and an area of approximately 367 m2 are described. With unevacuated beam lines this device gave an Earth-induced Sagnac frequency of 1513 Hz, with a relative Allan deviation over 1000 s ...
Lafon Cyril - - 2002
Heat deposition by interstitial routes, especially with ultrasound-based instruments, is becoming a valuable therapeutic option for the treatments of sites, which are difficult to access from outside of the body. The active part of most interstitial ultrasound applicators described in the literature is logically tubular to induce cylindrical volumes of ...
Gerdes Anja - - 2002
BACKGROUND: Prevention of intraoperative plaque dislodgement in patients with atherosclerotic ascending aorta by development of innovative aortic cannula designs gains growing interest in cardiac surgery. To increase knowledge about the hydrodynamics of the innovative Embol-X cannula, which includes an intra-aortic filter device targeting at atheromatous emboli capture, was the aim ...
O'Brien Eoin - - 2002
The banning of mercury from clinical practice will lead to the inevitable demise of traditional clinical sphygmomanometry. There are differences in approach to this important issue between European countries on the one hand, which generally have accepted that the mercury sphygmomanometer must be replaced with alternative devices, and the U.S. ...
Sepic Jerome - - 2002
BACKGROUND: Cardiac positioning during off-pump coronary artery bypass (OPCAB) using deep pericardial sutures (DPS) typically results in some degree of hemodynamic compromise. We sought to determine whether cardiac positioning using an apical suction device was hemodynamically superior to DPS. METHODS: Five healthy pigs underwent sternotomy and instrumentation to measure right ...
Kreis M E - - 2002
BACKGROUND: The barostat has been used to investigate gastrointestinal motility. No detailed technical evaluation to characterize the properties of this device for motility recordings has been reported. We, therefore, aimed to test the barostat in vitro under standardized conditions. METHODS: Barostat and manometry recordings were performed using a combined catheter ...
Wang Jia-Jung - - 2002
In this paper, a new measurement system for the noninvasive monitoring of the continuous blood pressure waveform in the radial artery is presented. The proposed system comprises a model-based fuzzy logic controller, an arterial tonometer and a micro syringe device. The flexible diaphragm tonometer registers the continuous blood pressure waveform. ...
Taylor P N - - 2002
Evaluation of a FES (Functional Electrical Stimulation) device for the relief of postural hypertension and augmentation of cough in a C3 ventilator-dependent tetraplegic. A single case study. A supra regional spinal unit in the UK. A dual channel stimulator was designed that allowed selection and initiation of two predetermined stimulation ...
Brooks Dina - - 2002
PURPOSE: Flutter therapy uses a handheld instrument that consists of a pipe-like device with a ball in the central core that oscillates during exhalation, providing oscillating positive expiratory pressure. The purpose of this study was to determine the effect of airflow and the incline of the device at the mouth ...
Couvillion Warren - - 2002
This paper describes a new virtual reality (VR) locomotion input device, the Pressure Mat, which allows a simulator user to navigate/traverse a virtual environment (VE) using similar motions as in the real world; i.e., walk, run, crawl. The device consists of an array of pressure sensitive resistors covered by a ...
Koegler Wendy S - - 2002
Biodegradable polymeric devices for drug delivery and tissue engineering are often fabricated with the use of organic solvents and may still contain significant amounts of solvent (> 1 wt%) even after aggressive vacuum drying. This excess solvent can interfere with tissue response and the mechanical properties of the devices. The ...
Walker S B - - 2001
This study compared two techniques, the FemoStop device (RADI Medical Systems, Uppsala, Sweden) and manual pressure, currently used by nurses to achieve haemostasis at the groin puncture site following removal of femoral arterial sheaths in patients following coronary angioplasty and coronary stent placement. Participants were randomly allocated the FemoStop device ...
Chung I S - - 2001
The purpose of this study was to evaluate the flow rate of elastomeric balloon infusor composed of rubber or silicone materials. Two models were studied: the Baxter Twoday Infusor and Advance Silicone Infusor. Each infusion device has a preset flow rate of 2 mL/hr. Fifteen units of each device were ...
Pomini F - - 2001
OBJECTIVE: To assess the agreement between manual auscultatory arterial blood pressure values and the values obtained by an automated oscillometric device in normotensive pregnant patients. METHODS: Arterial blood pressure was determined concomitantly by a Dinamap 1846 sx/p device and by one observer (I, IV, V Korotkoff sounds) blinded to the ...
O'Brien E - - 2001
With the increasing marketing of automated and semi-automated devices for the measurement of blood pressure, there is a need for potential purchasers to be able to satisfy themselves that such devices have been evaluated according to agreed criteria. Since their introduction a large number of blood pressure measuring devices have ...
O'Brien E - - 2001
There is a large market for blood pressure measuring devices, not only in clinical medicine, but also with the public where the demand for self-measurement of blood pressure is growing rapidly. For the consumer, whether medical or lay, device accuracy should be of prime importance in selecting a blood pressure ...
van Montfrans G A - - 2001
Oscillometric blood pressure measurement has become very popular, but although a number of devices have now passed both the Association for the Advancement of Medical Instrumentation and British Hypertension Society criteria, complacency with the state of the technique is as yet premature. In individual subjects, a substantial number of readings ...
O'Brien E - - 2001
To reach a consensus on important methodological aspects of blood pressure measurement. A Task Force on the methodological aspects of blood pressure measurement wrote this review after the Eighth International Consensus Conference on Blood Pressure Monitoring, in Sendai, Japan (28-31 October 2001). This consensus paper is based on the papers ...
Piper I - - 2001
OBJECTIVE: To audit the reliability of the Camino intracranial pressure (ICP) sensor (Camino Laboratories, San Diego, CA) in our clinical practice as part of a continuing quality assurance program, and to assess its relative usefulness as compared with currently available ICP monitoring technologies that we reviewed. DESIGN: Prospective audit of ...
Topliss C J - - 2001
Lower limb traction is applied with counter traction in the groin. The resultant tissue pressures can be high and may result in skin necrosis or nerve palsies. Volunteers were positioned on a fracture table and traction applied to the left leg. Perineal contact pressures were measured using pressure transducers connected ...
Broeders M E - - 2001
Aerosol delivery depends on device design and inhalation technique. In vitro device evaluations have shown that the emitted dose and fine particle mass of dry powder inhalers (DPIs) increase at high peak inspiratory flow rates (PIFR). Since the PIFR is mostly achieved after the release of the powder, slope of ...
Bailliet H - - 2001
A derivation of acoustic streaming in a steady-state thermoacoustic device is presented in the case of zero second-order time-averaged mass flux across the resonator section (nonlooped device). This yields analytical expressions for the time-independent second-order velocity, pressure gradient, and time-averaged mass flux in a fluid supporting a temperature gradient and ...
Gerin W - - 2001
BACKGROUND: Blood pressure is the most ubiquitous diagnostic recording made in the doctor's office, but the measurement is subject to a number of sources of bias, which may lead to over- or underestimation. The current study examined the systematic influence of the way in which the measurements were taken - ...
Braam R L - - 2001
OBJECTIVE: To show that different methods of data analysis affect the grading that blood pressure measuring devices achieve according to the British Hypertension Society (BHS)-protocol. METHODS: Based on the somewhat unclear description of the exact method of data analysis in the BHS-protocol four different methods can be discerned. The effect ...
- - 2001
AIMS: (I) To examine whether small holes produced by 248 nm excimer laser ablation in a polymer substrate could consistently produce a pressure drop in the desired target range (5-15 mm Hg) at physiological aqueous flow rates for use as an internal flow restrictor in a glaucoma drainage device, and ...
McCann U G UG 2nd Cardiopulmonary and Critical Care Laboratory, SUNY Upstate Medical University, University Hospital, Syracuse, NY, - - 2001
(1) To determine the validity of current recommendations for direct arterial BP measurement that suggest that the transducer (zeroed to atmosphere) be placed level with the catheter access regardless of subject positioning: and (2) to investigate the effect of transducer level, catheter access site, and subject positioning on direct arterial ...
Morgalla M H - - 2001
The assessment of the actual measurement accuracy of an intracranial pressure (ICP) transducer is imperative but still very difficult in practice. The authors tested the Codman MicroSensor ICP transducer experimentally. Additionally, a bedside test for assessment of measurement accuracy was used before and after clinical monitoring. For laboratory testing, seven ...
Chambers I R - - 2001
The Spiegelberg brain pressure catheter is a low cost implantable intracranial pressure measuring system which has the unique ability to perform regular automatic zeroing. A new version of the catheter has become available with a subdural bolt fixation to allow insertion of the device into the brain parenchyma. The accuracy ...
Chien R L - - 2001
A multiport system suitable for pressure control on a lab-on-a-chip microfluidic device is described. An algorithm and a strategy for calculating pressures were developed to control the flow from multiple reservoirs for the microfluidic devices. Dye mixing and enzyme assay titration experiments were performed using pressure-driven flow only. Results show ...
Pickering T - - 2001
Mercury sphygomanometers are being banned in many countries, but what will replace them for the routine management of clinic blood pressure is unresolved. The accuracy of the two most widely used alternatives, aneroid and oscillometric devices, is questionable. A proposed alternative is a hybrid sphygomomanometer which is based on the ...
Kong H - - 2001
The purpose of this study was to evaluate a new device specifically designed for patent ductus arteriosus (PDA) occlusion based on PDA anatomy. Percutaneous closure of aortopulmonary shunts was attempted in 10 dogs. Shunts were surgically created in the location and orientation of PDA. The occlusion prosthesis consisted of a ...
Yung P M - - 2001
The application of automated devices in measuring patients' blood pressure has been widely adopted in nursing practice. This study compared blood pressure recordings of two automated blood pressure monitors which were commonly used in clinical settings in Hong Kong. Single-arm recordings were obtained from 31 subjects with both devices. Ten ...
Maluf K S - - 2001
OBJECTIVE: To investigate the reliability and validity of measures obtained from a portable electronic device used to monitor changes in plantar pressure, temperature, and humidity that occur within the shoe during prolonged activity. DESIGN: Descriptive study comparing electronic sensor output with criterion values. SETTINGS: Indoor level walkway for pressure data; ...
Verkerke G J - - 2001
Rehabilitation after laryngectomy includes more and more the use of airflow-regulating devices such as shunt valves (SVs), tracheostoma valves (TSVs), and heat and moisture exchange (HME) filters. In determining the quality of those devices, airflow resistance is a very important factor. It is currently defined as pressure drop divided by ...
Amae S - - 2001
In this study, we developed and assessed an artificial anal sphincter driven by an shape memory alloy actuator (AS-SMA). The performance characteristics of the device were analyzed with a measurement system. Assessment showed that the AS-SMA could generate a pressure of 55 mm Hg at an atmospheric temperature of 36 ...
Frelich R - - 2001
BACKGROUND: RBC transfusions are often administered using externally applied pneumatic pressure. The effect of this practice on RBC hemolysis was studied during simulated transfusion performed in the laboratory. MATERIALS AND METHODS: RBC transfusions were performed sequentially via 16-, 18-, 20-, and 22-gauge cannulas with the application of a pneumatic pressure ...
Van den Kerckhove E - - 2001
This article gives an overview of the use of silicones in the treatment and prevention of hypertrophic (burn related) scars. Of all non-invasive treatment modalities the use of continuous pressure and occlusive contact media, e.g. silicones, seem to be generally accepted as the only ones that are able to manage ...
Li G R - - 2001
We have been developing a new left ventricular assist device, an axial flow pump implanted at the aortic valve position. Since the device is intended for long-term use, its motor unit and pump are physically separated. The device consists of a "rotor-impeller" and a support cage. The rotor joins the ...
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