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Results 451 - 500 of 1273
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Hinnen J W - - 2005
OBJECTIVES: The purpose of this study is to determine the accuracy of measuring pressure with a fluid filled pressure device (needle) and a non-fluid filled pressure device (catheter) inside a thrombosed aneurysmal sac after exclusion from circulation by endovascular grafting. METHODS: In a static environment, consisting of a syringe to ...
Wong William C W - - 2005
Automated blood pressure (BP) devices are used by many hypertensive patients in Hong Kong, with or without medical advice. At two community clinics, we invited hypertensive patients aged between 40 and 70 years who used such a device to fill in a questionnaire and to have four sets of BP ...
Parati Gianfranco - - 2005
This paper, which summarizes the conclusions of a WHO Expert meeting, is aimed at proposing indications to develop technical specifications for an accurate and affordable blood pressure measuring device for office/clinic use in low resource settings. Blood pressure measuring devices to be used in low resource settings should be accurate, ...
Amoore John N - - 2005
OBJECTIVE: To assess the measurement consistency of SpaceLabs ambulatory recorders (Spacelabs, Washington, USA) that are in regular use. METHODS: A total of 14 SpaceLabs 90207 and one 90217 ambulatory recorders were tested for measurement consistency using the Dynatech CuffLink (Dynatech, Nevada, USA), a commercially available non-invasive blood pressure (NIBP) simulator. ...
Arshak A - - 2005
Telemetry capsules have existed since the 1950s and were used to measure temperature, pH or pressure inside the gastrointestinal (GI) tract. It was hoped that these capsules would replace invasive techniques in the diagnosis of function disorders in the GI tract. However, problems such as signal loss and uncertainty of ...
Kim Youngseok - - 2005
The kymograph is device for measuring and presenting pressure-based signals, such as human heart beat and artery volume pressure. The Haptic Kymograph is a haptically-enhanced tele-medicine system which is used to acquire human vital signs and then to transform these signs into sensible, scalable and ubiquitous media so that a ...
Fukamachi Kiyotaka - - 2005
We have reported that the Myocor Coapsys (Myocor, Inc, Maple Grove, MN) device treated functional mitral regurgitation (MR) by reducing mitral annular dimension and repositioning papillary muscles. This study was conducted to evaluate the optimal Coapsys device sizing level. The Coapsys device was implanted in seven dogs after induction of ...
Thomas Stephen H - - 2005
OBJECTIVES: This study was conducted to test out-of-hospital performance of a noninvasive radial artery tonometry device to assess blood pressure (BP), providing readings every 10-12 seconds. The primary objective was to determine the correlation between noninvasive BPs calculated with radial artery tonometry and standard oscillometric cuff methods. The secondary objective ...
Imai A - - 2005
There is a need for a device for improved management of the airway of small laboratory animals during general anaesthesia. This report introduces such a device, referred to here as the airway device (AD). The AD has some similarity to the laryngeal mask airway (LMA) developed for human patients, but ...
Gusmão Sebastião - - 2005
A new suction tube that allows precise control of suction pressure during microsurgical procedures is described. The new device consists of a suction tube that has a series of small holes on its proximal end. These holes can be progressively opened or closed by a laterally placed sliding bar. The ...
Gehin C C Biomedical Microsensors Departement of the LPM of the INSA (National Institute of Applied Science) of Lyon, 20 avenue Albert Einstein, Villeurbanne, 69 621 France (phone:33 4 72 43 89 88; fax: 33 4 72 42 89 87; e-mail: - - 2005
Operative vaginal deliveries represent a significant amount of vaginal deliveries. Operative delivery involves either forceps either vacuum extraction. Complications are frequent but rarely severe (cutaneaous lesions, facial palsy...). However, it is essential to limit these complications by helping the obstetrician to position his extraction instrument. It is the aim of ...
Pickering Thomas G - - 2005
Accurate measurement of blood pressure is essential to classify individuals, to ascertain blood pressure-related risk, and to guide management. The auscultatory technique with a trained observer and mercury sphygmomanometer continues to be the method of choice for measurement in the office, using the first and fifth phases of the Korotkoff ...
Doelken Peter - - 2004
INTRODUCTION: Pleural manometry during large-volume thoracentesis can prevent the development of excessively negative pleural pressures, which have been associated with re-expansion pulmonary edema; can diagnose an unexpandable lung; and can predict pleurodesis success. We currently perform pleural manometry simultaneously with both a vertical-column water manometer with an interposed resistive element, ...
Shintani Yukihiro - - 2004
An interconnecting technique, the "PDMS connection method", for quartz microchips in a high-pressure system is presented. The connection between quartz microchips is an essential technology for modular microfluidic devices, such as microchip-HPLC. PDMS was applied to the seal material, being spread on the seal side of the chips, and set ...
Hussey S G - - 2004
OBJECTIVE: To compare three devices for manual neonatal ventilation. DESIGN: Participants performed a two minute period of ventilation using a self inflating device, an anaesthesia bag with attached manometer, and a Neopuff device. An intubated neonatal mannequin, approximating a 1 kg infant with functional lungs, was used for the study. ...
Talbi Abdelkrim - - 2004
Surface acoustic wave (SAW) devices have been shown to be suitable for many sensor applications. One of these applications is pressure sensor. In this study we investigate the performance of SAW pressure sensors formed with ZnO/Si(001) structure. The pressure sensitivities of Rayleigh mode as well as the Sezawa mode are ...
Rivoire Kelley - - 2004
OBJECTIVE: Fluorescence spectroscopy is a promising technology for the detection of cervical squamous intraepithelial lesions (SILs). In this study we took repeated measures in the cervix to determine whether the order of measurement produces changes in fluorescence intensity and whether there are differences in variation due to pressure. METHODS: A ...
Cain Samuel F SF - - 2004
Variations in solar radiation can produce noise in readings from gauge pressure transducers when the transducer cable is exposed to direct sunlight. This noise is a result of insolation-induced heating and cooling of the air column in the vent tube of the transducer cable. A controlled experiment was performed to ...
Abdenbi F - - 2004
Continuous positive airway pressure devices are routinely used to treat sleep breathing disorders. Automated devices that adjust the therapeutic pressure have recently been proposed. The utility of such devices is still controversial, as rigorous clinical comparisons are difficult to perform as a result of patient and device differences. The current ...
Cross Peter S - - 2004
We present the design of an electronically controlled drug delivery system. The intravaginally located device is a low-invasive platform that can measure and react inside the cow vagina while providing external control and monitoring ability. The electronics manufactured from off the shelf components occupies 16 mL of a Theratron syringe. ...
Monga Manoj - - 2004
BACKGROUND AND PURPOSE: Laparoscopic hand-assist devices have facilitated the broad application and acceptance of laparoscopy in urology and other surgical fields. This study evaluated forearm compression by these devices. MATERIALS AND METHODS: Five commercially available hand-assist devices were tested (Gelport, Intromit, PneumoSleeve, Handport, LapDisc). In three surgeons using a porcine ...
Mali V P - - 2004
PURPOSE: The aim of this study was to evaluate an alternative technique of reducing a ventral hernia that follows the primary conservative treatment of a giant omphalocoele. METHODS: The patient is a full-term male neonate with a giant exomphalos. Initially triple dye was applied as an eschar-inducing agent. This resulted ...
Schnoor J - - 2004
Pressurised infusion devices may have only limited capability to detect and remove air during pressurised infusions. In order to assess pressure infusion systems with regard to their actual air elimination capabilities four disposable pressure infusion systems and fluid warmers were investigated: The Level 1 (L-1), Ranger (RA), Gymar (GY), and ...
Verdecchia Paolo - - 2004
OBJECTIVES: To determine the accuracy of the UA-774 (UA-767Plus) blood pressure monitor developed by the A&D Company. METHODS: Device evaluation was performed according to the modified British Hypertension Society (BHS) protocol released in 1993. Eighty-five subjects with characteristics outlined in the BHS protocol were recruited among those attending the outpatient ...
Masri Bassam A - - 2004
Compression devices have been shown to prevent thromboembolic disease. However, the pressures generated may not be the same as the ones recommended by the manufacturer. The purpose of this study is to investigate a new sequential compression device with feedback to maintain optimal therapy, and to determine whether therapy is ...
Zhang Yonghao - - 2004
Induced pressure gradients are found to cause band-broadening effects which are important to the performance of microfluidic devices, such as capillary electrophoresis and capillary chromatography. An improved understanding of the underlying mechanisms causing an induced pressure gradient in electroosmotic flows is presented. The analysis shows that the induced pressure distribution ...
Thexton A J - - 2004
The objective was to clarify the relationship between tongue movements during suckling and the pressures in different parts of the oral cavity. A modified teat allowed a miniature pressure transducer to be passed through into the mouth. Intraoral pressures were recorded in piglets suckling on the teat attached (1) to ...
Jones J G - - 2004
Fixed performance venturi devices should provide a predetermined oxygen concentration at an outflow which exceeds an adult's peak resting inspiratory flow rate (approximately 30 l.min(-1)). Campbell's original description mentioned the sensitivity of the venturi device to downstream resistance but gave no further details. This study examined outflow and oxygen concentration ...
Miller Larry S - - 2004
OBJECTIVE: To develop a noninvasive method and device to determine intravariceal pressure and variceal wall tension by measuring the variables of the Laplace equation and test this device in a model of esophageal varices. METHODS: Two variceal pressure measurement devices were constructed. The first device consists of an Olympus 20 ...
Hundley Andrew F - - 2004
The aim of this study was to compare pressure readings obtained with catheter-mounted microtip and external water pressure transducers using a mechanical model for vesical pressure during Valsalva straining and coughing. The two catheter-mounted pressure transducers were simultaneously placed in a vinyl i.v. bag designed to mimic the parameters of ...
Lurie Keith G - - 2004
OBJECTIVE: An inspiratory impedance threshold device was evaluated in spontaneously breathing animals with hypotension to determine whether it could help improve systemic arterial pressures when fluid replacement was not immediately available. DESIGN: Prospective, randomized. SETTING: Animal laboratory. SUBJECTS: Thirty-nine female farm pigs (weight, 28-33 kg). INTERVENTIONS: A total of 39 ...
Someya Takao - - 2004
It is now widely accepted that skin sensitivity will be very important for future robots used by humans in daily life for housekeeping and entertainment purposes. Despite this fact, relatively little progress has been made in the field of pressure recognition compared to the areas of sight and voice recognition, ...
Ubbink D Th - - 2004
OBJECTIVES: To study the usefulness of a new laser Doppler (LD) device as compared with photoplethysmography (PPG) to measure toe systolic blood pressures (TBP) in patients suspected of arterial insufficiency of the legs. DESIGN: Prospective comparative clinical study. MATERIALS AND METHODS: Seventy patients (121 legs) referred to our vascular laboratory ...
Terra Steven G - - 2004
Small sample sizes are typically incorporated in early Phase I clinical studies, which may lead to insignificant changes in safety parameters such as blood pressure. Therefore, it is paramount to identify an optimal, noninvasive method of accurately measuring blood pressure and an appropriate analysis strategy yielding the smallest variability. The ...
Pannell Michael A - - 2004
According to Environmental Protection Agency estimates, 20% of hazardous waste drums currently managed in the 6500 known, uncontrolled Superfund removal or remediation sites contain some degree of elevated internal pressurization. This estimate increases to 90% during the summer months, and, overall, up to 5% of the drums stored in active ...
Chiolero Arnaud - - 2004
OBJECTIVE: The estimation of blood pressure is dependent on the accuracy of the measurement devices. We compared blood pressure readings obtained with an automated oscillometric arm-cuff device and with an automated oscillometric wrist-cuff device and then assessed the prevalence of defined blood pressure categories. METHODS: Within a population-based survey in ...
Lopez Larry M - - 2004
OBJECTIVE: To review the literature regarding point-of-care blood pressure monitoring and describe its role in pharmacy practice. DATA SOURCES: Primary articles were identified by a MEDLINE search (1966-May 2003); references cited in these articles provided additional resources. STUDY SELECTION AND DATA EXTRACTION: All articles identified from this search were reviewed ...
Atwater Benjamin I - - 2004
STUDY OBJECTIVE: To measure the surface pressure on the face of a patient placed in the prone position with the most commonly used prone positioning devices, a non-face-contoured positioner (PP) and a new face-contoured device (PV). DESIGN: Prospective, randomized comparison. SETTING: Operating room in an American academic medical center. SUBJECTS: ...
Joseph Jean - - 2004
BACKGROUND AND PURPOSE: New devices such as the Ti-knot and Hem-o-lok clips have been developed for laparoscopic surgical applications. We compared the effectiveness of Ti-knot TK5 (LSI Solutions), Hem-o-lok MLK clips (Weck Closure), Ligaclip 5-mm titanium clips (Ethicon), and Endopath vascular staples (35 mm long, 12.3 mm wide) (Ethicon). MATERIALS ...
Wang Chuji - - 2004
An exploratory study on a novel fiber ringdown pressure sensor is presented. With this technique, pressure measurements are achieved in a time domain by measurement of ringdown times. The proof-of-concept device consists of a diode laser light source, two 2 x 1 fiber couplers, a section of fused-silica single-mode fiber, ...
Nolly Hector - - 2004
BACKGROUND: The Sixth Report of the Joint National Committee states that the 'measurement of blood pressure outside the clinician's office may provide valuable information for the initial evaluation of patients with hypertension and for monitoring the response to treatment'. Prior to their marketing, however, blood pressure measuring devices should be ...
Alpert Bruce S - - 2004
OBJECTIVE: To test the Pharma-Smart Model PS-2000 public use blood pressure monitor for compliance with the Association for the Advancement of Medical Instrumentation's Standard (AAMI) and to a modified British Hypertension Society (BHS) Protocol. METHODS: Subjects tested ranged in age from 18-74, with the average age of 40. Arm circumference ...
Cuckson Alexandra C - - 2004
OBJECTIVES: Up to one-third of all blood pressure devices sold are for measurement at the wrist. Wrist monitors are thought to be subject to errors associated with movement and incorrect posture. We used the British Hypertension Society protocol to determine the accuracy of the Omron Rx automated wrist blood pressure ...
Schutte A E - - 2004
The improved Finapres apparatus, known as the Finometer, measures finger blood pressure noninvasively on a beat-to-beat basis and gives waveform measurements similar to intra-arterial recordings. The Finometer measures brachial pressure and corrects for finger pressure accordingly. It also corrects for the hydrostatic height of the finger with respect to the ...
Mattu Gurdial S - - 2004
BACKGROUND: The objective of this report is to combine the data from an earlier adult study with the data from a paediatric study in order to determine the overall accuracy of the BpTRU (BPM-100 model) as compared to the recognized standard, auscultatory mercury sphygmomanometer. DESIGN: The individual blood pressure points ...
Pantalos George M - - 2004
A need exists for a mock circulation that behaves in a physiologic manner for testing cardiac devices in normal and pathologic states. To address this need, an integrated mock cardiovascular system consisting of an atrium, ventricle, and systemic and coronary vasculature was developed specifically for testing ventricular assist devices (VADs). ...
Pritchard Susan E - - 2004
The anatomical geometry of the upper airways of 20 volunteers has been studied using three-dimensional (3D)inhalation-gated magnetic resonance imaging (MRI)for four separate dummy inhalation devices of varying diameters and resistances. The only anatomical parameters showing a consistent dependence upon device characteristics were the total airway and buccal volumes between large ...
Moore K N - - 2004
OBJECTIVES: To assess the safety, efficacy, comfort, and patient satisfaction with three penile compression devices: the Cunningham clamp, C3, and U-Tex. METHODS: The devices were tested in random order in a multiple-period, crossover study design using a Latin squares configuration. The subjects had undergone radical prostatectomy 6 months or more ...
Rathnasingham Ruben - - 2004
The formal characterization of the performance of microfluidic delivery devices is crucial for reliable in vivo application. A comprehensive laboratory technique was developed and used to optimize, calibrate and validate microfabricated fluid delivery devices. In vivo experiments were carried out to verify the accuracy and reliability of the pressure driven ...
Bolanos Marcos M Department of Electrical and Computer Engineering, University of Texas, El Paso, TX 79968, - - 2004
An electrocardiogram (ECG) / blood pressure (BP) telemonitor consisting of comprehensive integration of various electrical engineering concepts, devices, and methods was developed. This personal digital assistant-based (PDAbased) system focused on integration of biopotential amplifiers, photoplethysmographic measurement of blood pressure, microcontroller devices, programming methods, wireless transmission, signal filtering and analysis, interfacing, ...
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