Search Results
Results 501 - 550 of 1263
< 6 7 8 9 10 11 12 13 14 15 16 >
Sinha Uttam K - - 2003
We conducted a study to quantitatively determine the pressure perception thresholds in the oral cavity and oropharynx of a normal population with the Pressure-Specifying Sensory Device (PSSD). The PSSD measured pressure perception thresholds for both static and moving one- and two-point discrimination modalities at a variety of sites in the ...
Dyer I R - - 2003
BACKGROUND AND OBJECTIVE: This study investigated the distribution of pressures within a model trachea, produced by five different tracheal gas insufflation devices. The aim was to suggest a suitable design of a tracheal gas insufflation device for clinical use. METHODS: Each device was tested using insufflation flow rates of 5 ...
Vassalos A - - 2003
The results are reported of a postal survey into current trends in the management of compartment syndrome and the use of compartment pressure monitoring (CPM) within Scottish trauma units. The majority of consultants in the study felt that all patients, especially the obtunded, with suspected compartment syndrome should be diagnosed ...
Hertegonne Katrien B - - 2003
STUDY OBJECTIVES: The purpose of this study was to compare comfort parameters and pressure profiles of the AutoSet (Resmed) and the SOMNOsmart (Weinmann), two auto-adjustable positive airway pressure (APAP) devices. SETTING: The sleep disorders center of a university hospital. DESIGN: A single-blind randomized trial protocol was applied. A split night ...
O'Brien Eoin - - 2003
Consumers are faced with an ever-increasing array of blood pressure measuring devices, whether for use in clinical areas or for use by individuals anxious to measure their own blood pressure. Validation protocols that allow for independent evaluation of blood pressure measuring devices are available, and some of the devices on ...
Lang Josef-Michael - - 2003
The Spiegelberg 3-PN intraparenchymal pressure sensor was clinically evaluated. The Spiegelberg intraparenchymal pressure sensor is a low-cost device that uniquely performs regular automatic zeroing in situ throughout the measurement period. The Spiegelberg sensor was inserted in 87 patients who required intracranial pressure monitoring as part of their routine management. Complications ...
Baumann Michael H - - 2003
PURPOSE: Flow rates and pressures generated by commercially available pleural drainage units (PDUs) and flow rates through available pleural drainage catheters (PDCs) are not known. This information may be important clinically depending on the volume of air leak associated with a bronchopleural fistula. DESIGN: Eight PDUs were assessed for flow ...
El Assaad Mohamed A - - 2003
BACKGROUND: Two devices for self-measurement of blood pressure at the brachial artery-the Omron M5-I and the Omron 705IT-were evaluated according to the international protocol of the European Society of Hypertension. DESIGN: The international validation protocol is divided into two phases: the first phase is performed on 15 selected subjects and ...
Zhong Jun - - 2003
With the advent of newer devices for measuring intracranial pressure (ICP) and cerebral metabolism, more alternatives continue to rise aiming to control ICP. This manuscript presents a proposed analysis of different ICP monitoring devices in order to make appropriate selection of them in our clinical setting including general and pediatric ...
Lee Kyoung Ho - - 2003
PURPOSE: To develop a method for the quantitative and longitudinal assessment of clogging in drainage catheters and to confirm the validity of the method. MATERIALS AND METHODS: Intracatheter pressure was measured during the infusion of saline at a rate of 0.1-3.0 mL/sec in nine catheters with different internal diameters. With ...
Baker E A - - 2003
OBJECTIVES: The primary objective of this study was to determine differences in interface pressure between four mattress combinations: a standard operating table mattress, a pressure-relieving gel pad and an under-patient warming device set at 38 degrees C (Pegasus Inditherm System) and at ambient temperature. The secondary objective was to determine ...
Reinders Annemarie - - 2003
BACKGROUND: Measuring blood pressure with mercury-independent alternatives is rapidly gaining attention. Mercury will be phased out of clinical use as a result of environmental, health and safety concerns and it is of vital importance that any alternative to mercury has to be of a recognized standard. We assessed the accuracy ...
Friedland Shai - - 2003
BACKGROUND: Advances in optical and computer technology have enabled the development of a device that uses white-light reflectance spectrophotometry to measure capillary hemoglobin saturation in intestinal mucosa during colonoscopy. METHODS: Studies were performed with the colon oximeter in anesthetized animals and patients undergoing colonoscopy. RESULTS: Mean (SD) mucosal hemoglobin saturation ...
Longo Daniele - - 2003
OBJECTIVE: To determine the accuracy of the UA-787 oscillometric blood pressure monitor developed by the A&D Company. DESIGN: Evaluation of the UA-787 was performed using the new protocol of the European Society of Hypertension. The performance of the monitor was assessed in relation to the subjects' gender, age, skinfold thickness, ...
Grippo A - - 2003
OBJECTIVE: Several studies have previously shown respiratory related evoked potentials (RREP) in humans elicited by mechanical stimuli applied on upper airways (UA). According to us, heterogeneous findings, concerning latencies and amplitudes, have been reported because of the different timing of stimuli application during the respiratory cycle and/or features of pressure ...
Oppenheim Irving J - - 2003
We report electrical characterization of micromachined polysilicon capacitive diaphragms for use as ultrasonic transducers. Admittance measurements yield insight into the resonant behavior and also the damping resulting from ultrasonic radiation and frictional forces caused by the etch release holes. Unbonded transducers exhibit sharp resonances with Q values that increase with ...
Heyward Philip M - - 2003
Formation of a high-resistance seal between the tip of a glass recording pipette and the membrane of the recorded cell is the crucial step in patch clamping, or whole cell recording with patch pipettes. Formation of the seal, and subsequent rupture of the membrane for whole cell recording, requires a ...
O'Brien Eoin - - 2003
After a little more than a century of use, the conventional Riva-Rocci/Korotkoff technique of measuring blood pressure with a mercury sphygmomanometer and stethoscope, is now being relegated to the museum shelves. Affectionately attached though we may be to this clinical measurement, we must acknowledge that the technique is fraught with ...
Parati Gianfranco - - 2003
Continuous blood pressure monitoring is an essential prerequisite for any study on blood pressure variability. Invasive procedures are no longer acceptable for research projects in a clinical setting, and recently developed devices able to record blood pressure on a beat-by-beat basis in a non-invasive fashion may represent valuable alternative tools. ...
Volsko Teresa A - - 2003
BACKGROUND: Oscillatory positive expiratory pressure (PEP) with the Flutter device facilitates secretion removal. In the Flutter a steel ball vibrates inside a cone, causing air flow vibration. A new device, the Acapella, uses a counterweighted plug and magnet to create air flow oscillation. The Acapella comes in 2 models: one ...
Urquhart G - - 2003
The practice of using conventional mediastinal chest tubes (MCTs) connected to a closed collection device is commonplace in cardiovascular surgery care settings. The MCT collection device requires a closed system to maintain a negative intrathoracic pressure with the goal of preventing inadvertent trapping of air and blood within the mediastinal ...
Golara Moneli - - 2002
BACKGROUND: To evaluate the accuracy of the OMRON-MIT, (an automated inflationary oscillometric blood pressure monitoring device) for use in the general population by direct comparison to standard auscultatory mercury sphygmomanometry. DESIGN: Two trained, blinded observers taking simultaneous blood pressure measurements alternating between a mercury sphygmomanometer and the OMRON-MIT. METHODS: The ...
Cuckson Alexandra C - - 2002
BACKGROUND: The market for devices for the self-measurement of blood pressure is growing, and as accuracy is of prime importance, there is increasing pressure for manufacturers to provide evidence of independent testing. Recent reviews have shown that only five automated upper arm devices for self-measurement of blood pressure have been ...
Ploin Dominique - - 2002
BACKGROUND: The Calor TensioSense Bras automatic blood pressure monitor has obtained European Union certification, but the clinical validity of this new oscillometric device when handled by lay subjects has yet to be evaluated. DESIGN: The design employed prospective and blinded blood pressure measurements and a validation procedure according to the ...
Bigelow Timothy A - - 2002
Because the number of applications for medical ultrasonic devices continue to increase and, hence, the number of diagnostic ultrasound (US) systems increase, there is a need to reliably characterize the sources in terms of their output pressures. Currently, the transducers are characterized by making pressure measurements in water for every ...
Sferruzza Jean-Pierre - - 2002
New clinical concepts in lithotripsy demand small shock heads. Reducing the size of piezoelectric shock heads will be possible only if the pressure generated at the surface of each transducer can be increased so that the total pressure at the focus remains the same. To solve this problem, different solutions ...
Golara Moneli - - 2002
OBJECTIVE: To evaluate the accuracy of the OMRON-MIT inflationary oscillometric device for blood pressure measurement in pregnancy and pre-eclampsia. DESIGN: Prospective observational study, using validation methods recommended by the British Hypertension Society (BHS) and the Association for the Advancement of Medical Instrumentation (AAMI). SETTINGS: Antenatal clinics and ward, Guy's Hospital, ...
Vote B J T - - 2002
PURPOSE: To assess a humidity device used in vitreoretinal surgery. METHODS: Infrared absorption spectroscopy analysis of absolute water content (absolute humidity) was determined for a typical vitreoretinal air infusion line with and without the humidifying device. A variety of experimental laboratory conditions were utilized and designed to mimic those found ...
Altunkan Sekip - - 2002
BACKGROUND: In this study, we compared two wrist blood pressure-measuring devices, the Omron RX and the Nissei WS-310, against a mercury manometer. METHOD: A total of 152 subjects attending an out-patient hypertensive clinic were recruited from a randomized blood pressure survey, 87 patients (mean 44.4 +/- 14.5 years of age) ...
Hasselbrink Ernest F EF - - 2002
We have developed a nonstick polymer formulation for creating moving parts inside of microfluidic channels and have applied the technique to create piston-based devices that overcome several microfluidic flow control challenges. The parts were created bycompletely filling the channels of a glass microfluidic chip with the monomer/ solvent/initiator components of ...
Herbst Timothy - - 2002
BACKGROUND: Non-invasive blood pressure (BP) devices should be independently evaluated before being used in special populations. The objective of this study was to assess the accuracy of the Welch-Allyn transtelephonic home blood pressure monitor in adults with Parkinson's disease to evaluate the device for use in a large clinical trial ...
Wahlberg E - - 2002
OBJECTIVE: toe blood pressure (TBP) is an important method to assess peripheral arterial disease especially in patients with diabetes, but remains difficult to measure. We have developed a simple portable device for TBP measurements. METHODS AND RESULTS: first, TBP was determined in 40 ischemic legs with both laser Doppler and ...
Hattler Brack G - - 2002
OBJECTIVES: Acute respiratory failure is associated with a mortality of 40% to 50%, despite advanced ventilator support and extracorporeal membrane oxygenation. A respiratory gas exchange catheter (the Hattler Catheter) has been developed as an oxygenator and carbon dioxide removal device for placement in the vena cava and right atrium in ...
Müller-Hülsbeck Stefan - - 2002
PURPOSE: To determine in vitro the efficacy of clot removal of the AngioJet (AJ; new 6-F generation), Hydrolyser (HL; 6-F), and Oasis (OS; 6-F) hydrodynamic thrombectomy devices and the Amplatz Thrombectomy Device fragmentation catheter (ATD; 8-F and new-generation 7-F) in large-diameter vessels and low-pressure fluid dynamic applications (ie, pulmonary embolism). ...
Spahn Joseph D - - 2002
New inhaled steroids or new formulations of inhaled steroids continue to be introduced on a regular basis in an attempt to replace hydrochlorofluorocarbon propellant-based, pressurized, metered dose delivery systems. New delivery systems are being introduced with either a replacement propellant in a pressurized metered dose inhaler, such as a hydrofluoroalkane, ...
Miller Elan S - - 2002
BACKGROUND: Esophageal varices are a frequent source of bleeding in patients with cirrhosis. Elevated intravariceal pressure is associated with variceal bleeding. There is no simple, easy-to-use device for noninvasive measurement of intravariceal pressure. The purposes of this study were to develop a noninvasive method for measuring intravariceal pressure, and to ...
Prisant L Michael - - 2002
OBJECTIVES: The aim of these studies was to assess repeatability of large (C1) and small (C2) arterial elasticity indices over various time intervals using the HDI/Pulsewave CR-2000 Research CardioVascular Profiling System (Hypertension Diagnostics, Inc., Eagan, Minnesota, USA). Non-invasive hemodynamic parameters using this device were compared to invasive measurements. METHODS: After ...
El Assaad Mohamed A - - 2002
BACKGROUND: The aim of this study was to validate the Omron HEM-907 blood pressure (BP) measuring device according to the international validation protocol. DESIGN: The international validation protocol is divided into two phases: the first phase is performed on 15 selected subjects and if the device passes this phase, 18 ...
Fink James B - - 2002
High-frequency oscillation (HFO), applied to either the airway or chest wall, has been associated with changes in sputum attributes and clearance. The evolution of evidence, both in vitro and in vivo, supporting the use of HFO is reviewed. Devices that apply HFO to the airway range from the relatively simple ...
Chung Joanne W Y - - 2002
To investigate whether the application of manual pressure to the injection site before intramuscular injection reduces pain. An experimental study with intrasubject comparison was conducted using manual pressure to reduce pain associated with intramuscular injection. Seventy-four subjects, participating in an immunization vaccination campaign, were recruited by convenience sampling from a ...
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 ...
< 6 7 8 9 10 11 12 13 14 15 16 >