Search Results
Results 401 - 450 of 1276
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Yoshida K - - 2006
OBJECTIVES: The aim of this study was to assess the strength (pressure resistance) and histological findings of aortic anastomoses performed using a circular stapling device. MATERIALS AND METHODS: A circular stapling device was used for anastomosing a porcine aorta and a Dacron graft. The maximum pressure resistance of the anastomotic ...
Partsch Hugo - - 2006
BACKGROUND: Interface pressure and stiffness characterizing the elastic properties of the material are the parameters determining the dosage of compression treatment and should therefore be measured in future clinical trials. OBJECTIVE: To provide some recommendations regarding the use of suitable methods for this indication. METHOD: This article was formulated based ...
Campos Javier H - - 2006
BACKGROUND: Lung isolation is accomplished with a double-lumen tube or a bronchial blocker. Previous studies comparing lung isolation methods were performed by experienced anesthesiologists in thoracic anesthesia. Therefore, the results of these studies may not be relevant to the anesthesiologist with limited experience. This study compared the success rates of ...
Rioufol Gilles - - 2006
Thrombus removal by aspiration is one of the adjunctive techniques used to avoid embolization during PCI for acute myocardial infarction. Numerous devices are now available, but little is known about the mechanical rationale used in comparing them. The aim of the present study was to determine parameters to obtain optimal ...
Øyri Karl - - 2006
Patient monitoring devices supporting wireless transmission can facilitate transport and ambulation of patients in hospitals. To replace wired sensors with wireless sensors, the accuracy and resistance to interference of the wireless sensors have to be documented. We compared the performance of a wireless arterial blood pressure biomedical sensor prototype with ...
Stampfer C - - 2006
We report on the fabrication and characterization of bulk micromachined pressure sensors based on individual single-walled carbon nanotubes (SWNTs) as the active electromechanical transducer elements. The electromechanical sensor device consists of an individual electrically connected SWNT adsorbed on top of a 100-nm-thick atomic layer deposited (ALD) circular alumina (Al(2)O(3)) membrane ...
Coleman Andrew - - 2006
BACKGROUND: The Omron 705IT (HEM-759-E, Omron Corporation, Kyoto, Japan) is an automated oscillometric upper arm blood pressure monitor for the professional and home use markets. The aim of this study was to validate the accuracy of this device according to the British Hypertension Society and the Association for the Advancement ...
Lagerburg V - - 2006
The purpose of this study is to develop and test a tapping device for needle insertion for prostate brachytherapy. This device will tap the needle into the prostate with a certain, well-defined, amount of momentum, instead of the currently used method of pushing the needle. Because of the high needle ...
Behan J R - - 2006
A novel insemination catheter with a smaller polyurethane tip for deeper insertion into the cervix of gilts was compared with the conventional catheter. The novel catheter could be inserted 31.4 mm deeper than the conventional catheter into the gilt cervix, but the difference diminished with parity until the sixth parity ...
Vanhecke Dimitri - - 2006
A microbiopsy system was developed to overcome long sampling times for tissues before they are cryo-fixed by high-pressure freezing. A commercially available biopsy gun was adapted to the needs of small-organ excisions, and biopsy needles were modified to allow small samples (0.6 mm x 1.2 mm x 0.3 mm) to ...
Thumann Gabriele - - 2006
PURPOSE: The controlled orientation of subretinal or intraretinal delivery of delicate tissue sheets is a critical problem in retinal transplantation research. METHODS: A surgical device (explant injector) was designed and built for the controlled delivery of tissue explants into the subretinal or intraretinal space via a vitrectomy approach. The technical ...
Elliott William J - - 2006
The belief that breathing exercises may provide health benefits has been shared by many cultures for centuries. A case study illustrates one such FDA-approved intervention, its performance over time, and the day-to-day home blood pressure (BP) variation in response to treatment. The device used by this patient (which interactively entrains ...
Shaltis Phillip A PA Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA. - - 2006
A truly wearable non-invasive blood pressure (NIBP) sensor--light-weight, compact, unobstrusive, and essentially unnoticeable to the patient--could revolutionize healthcare delivered beyond the traditional walls of medical facilities, offering new ways to care for patients in their everyday surroundings. This paper presents results from our work towards the development of a self-contained, ...
Wendell Dawn M DM Mechanical Engineering Department, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. - - 2006
Current jet injection devices often utilize compressed air or springs to create a high-pressure fluid jet capable of piercing the skin. However, these devices are limited to a single invariable injection profile based on the impulse created by the compressed air or spring and therefore the parameters that affect injection ...
Gaied I - - 2006
Stocking supports have represented, for more than two millennia, the most efficient way to treat the veinous diseases and lymphatic disorders. Although this treatment consists solely in the application of a mechanical pressure to help the blood in reaching back the heart, very little is known on this mechanical effort ...
Amadasun F E - - 2005
The study compared two non-invasive methods of blood pressure measurements used in the anaesthetic management of patients, the conventional sphygmomanometric and the oscillometric methods. One hundred adult in-patients were involved, and 400 blood pressure measurements were done with the two devices. The sphygmomanometric measurements were higher in systolic, diastolic and ...
Kobalava Zhanna D - - 2005
OBJECTIVE: To perform clinical validation of the TM-2564G device for in-hospital blood pressure measurement according to the British Hypertension Society protocol. METHODS: The tests were carried out on 85 patients aged 19-82 years (41 male patients, mean age 50+/-19 years) with systolic blood pressure 75-219 mmHg and diastolic blood pressure ...
Coller Dale - - 2005
Automatic positive airway pressure (auto-PAP) devices, used in the treatment of patients with obstructive sleep apnea (OSA), may not function optimally in the presence of an air leak. We set out to determine the magnitude of air leak that prevents auto-PAP devices from responding to respiratory events of OSA in ...
Topouchian Jirar A - - 2005
BACKGROUND: Two electronic devices for self-measurement of blood pressure at the brachial artery -- the Seinex SE-9400 and the Microlife BP 3AC1-1 -- were evaluated in two separate studies according to the International Protocol of the European Society of Hypertension. DESIGN: The international validation protocol is divided into two phases: ...
Hundley Andrew F AF Division of Female Pelvic Medicine and Reconstructive Pelvic Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC, - - 2006
This study compared simultaneous intravesical pressure readings obtained with catheter-mounted microtip transducers and external water pressure transducer catheters during filling cystometry. Women undergoing multichannel urodynamic testing were randomly assigned to one of three groups: two microtip catheters, two external water pressure transducer catheters, or one of each type. Intravesical pressure ...
Laube Beth L - - 2005
HYPOTHESIS: We hypothesized that aerosol distribution in the lungs of patients with cystic fibrosis changes with positive expiratory pressure (PEP). METHODS: Eight patients were randomized to one of 2 conditions. On one study day, patients inhaled saline aerosol containing 99mtechnetium generated by a Pari LC Plus nebulizer and exhaled through ...
Boody Antony R - - 2005
BACKGROUND: In situations in which accurate physical diagnosis is inconclusive, an objective method for measuring compartment pressure can aid in the diagnosis of compartment syndrome. Previous studies have compared measurement devices with each other but not with an accurately determined gold standard. The purpose of the present study was to ...
Lechner Wolfgang - - 2005
BACKGROUND: By application of a newly developed device for invasive pressure measurements, we have investigated band adjustments monitored by in vivo intraband pressures. With access to the port of the gastric banding device, pressures can be recorded inside the band system at rest and during bolus application with different adjustments ...
Yambe Tomoyuki - - 2005
A rotary blood pump (RP) is desirable as a small ventricular assist device (VAD). However, an RP is nonpulsatile. We tried to develop a device that attaches a pulse to the RP. We also tried to develop a pulse-generating equipment that was not air-pressure driven. The ball screw motor was ...
Kaneko Atsushi - - 2005
The purpose of the present study was to determine the effect of age on digital pressure perception as measured by two-point discrimination (2PD) testing. The subjects were 177 normal volunteers ranging in age from 20 to 79 years. Perceptible pressure of static and moving 2PD was measured on the index ...
Braam Richard L - - 2005
BACKGROUND: In validation studies reporting on the accuracy of blood pressure measuring devices (ambulatory and non-ambulatory systems), it is frequently stated that the accuracy of blood pressure devices seems to decrease at increasing blood pressure levels. This has been shown for several ambulatory devices in the past. Whether more recently ...
Sims Andrew J - - 2005
OBJECTIVES: Measurement of blood pressure by a trained observer using a mercury sphygmomanometer is accepted as the gold standard, but there has been an increase in the use of automated devices employing the oscillometric technique. Not all such devices have been clinically validated, and some do not carry an appropriate ...
Semret Merfake - - 2005
BACKGROUND: Oscillometric devices are commonly used to measure blood pressure and their validation entails sequential measurements of auscultated and oscillometric blood pressures. It is unknown whether simultaneous measurement of auscultated blood pressure and concurrent digitization and recording of the sounds can improve assessment of such devices. The aim of this ...
Gates George A - - 2005
Until recently, surgery was the only treatment option for people with disabling Meniere's disease that did not respond to adequate medical therapy. A new intermediate level treatment modality, the Meniett device, which applies low-pressure micropulses to the inner ear, has now been shown to be safe and effective. The device ...
Hu Bing - - 2005
BACKGROUND: Control of bleeding from major arteries in the upper-GI tract remains difficult with currently available endoscopic devices. We designed an endosuture device that uses a curved needle and extracorporeal knotting, and assessed the device in stopping arterial bleeding in a bench model. METHODS: Harvested porcine splenic arteries (2-mm diameter) ...
Rutschmann Olivier T - - 2005
STUDY OBJECTIVE: We compare the performance of a wrist blood pressure oscillometer with the mercury standard in the triage process of an emergency department (ED) and evaluate the impact of wrist blood pressure measurement on triage decision. METHODS: Blood pressure was successively measured with the standard mercury sphygmomanometer and with ...
Kobalava Zhanna D - - 2005
OBJECTIVE: To perform a clinical validation for a semi-automatic arm-type device UA-704 (A&D Company, Ltd., Tokyo, Japan) according to the British Hypertension Society protocol. METHODS: Eighty-five study participants (37 men) were included. The mean age was 50.1+/-17.0 years, systolic blood pressure range was 79-212 mmHg and diastolic blood pressure range ...
Wiles Jonathan D - - 2005
There is a paucity of research on devices suitable for home-based isometric exercise. Our aim was to compare cardiovascular responses to isometric exercise using novel and established methods. Ten individuals (age 34.0 +/- 8.5 years, mass 68.2 +/- 10.4 kg, height 1.72 +/- 0.09 m; mean +/- s) performed three ...
Coleman Andrew J - - 2005
BACKGROUND: It is widely recommended that sphygmomanometers are maintained and calibrated regularly to ensure that the pressure scale remains accurate to within the European Standard specification of +/-3 mmHg. In primary care, however, such checks are reported to be only rarely performed. This paper describes a survey of the accuracy ...
Sciscione Anthony C - - 2005
OBJECTIVE: To compare the rate of extramembranous placement between 2 types of intrauterine pressure catheter. STUDY DESIGN: Women were randomized to a transducer-tipped intrauterine pressure catheter or an air-coupled intrauterine pressure catheter from October 1998 to August 1999. Women were eligible for the study if their attending physicians decided to ...
Hu Bing - - 2005
BACKGROUND: To eliminate cumbersome extracorporeal knotting, we designed a new endoscopic suturing device, the Eagle Claw V. The efficacy of the new device was tested on the Erlangen model and was compared with the initial extracorporeal knotting version (Eagle Claw II). METHODS: Segments of porcine splenic arteries were placed on ...
de Cocq P - - 2006
Saddle-fit is recognised as an important factor in the pathogenesis of back problems in horses and is empirically being evaluated by pressure measurements in clinical practice, although not much is known about the validity, reliability and usability of these devices in the equine field. This study was conducted to assess ...
Kucher Nils - - 2005
PURPOSE: To evaluate a percutaneous pulmonary embolism (PE) thrombectomy catheter that aspirates, macerates, and removes thrombus. MATERIALS AND METHODS: Nine in vitro tests were performed by using porcine thrombi at a PE test station that provides continuous fluid output of 2 L/min at a pressure of 50 mmHg. Macroembolization was ...
Rokhsari H - - 2005
As Q factor is boosted in microscale optical resonant systems there will be a natural tendency for these systems to experience a radiation-pressure induced instability. The instability is manifested as a regenerative oscillation (at radio frequencies) of the mechanical modes of the microcavity. The first observation of this radiation-pressure-induced instability ...
Beales Debbie - - 2005
Increasingly, automated blood pressure devices are replacing mercury sphygmomanometers to monitor blood pressure in primary care settings. Practitioners have raised questions about the accuracy of these new devices, so a mini-review was undertaken to examine the evidence. A systematic search of the Medline database identified seven studies that were of ...
Paul Jinu - - 2005
Handgrip strength is an easy measure of skeletal muscle function as well as a powerful predictor of disability, morbidity, and mortality. In order to measure grip strength, a novel fiber-optic approach is proposed and demonstrated. The strain-dependent wavelength response of fiber Bragg gratings has been utilized to obtain the strength ...
Novitsky Yuri W - - 2005
Various sources of ultrasonic and thermal energy have been developed to facilitate blood vessel ligation. However, their efficacy in sealing lymphatics has not been clearly established to date. We hypothesized that the electrosurgical bipolar vessel sealer (EBVS) produces reliable and durable sealing of large lymphatic vessels in a porcine model. ...
Coleman Andrew - - 2005
BACKGROUND: Demand for devices that allow the self-assessment of blood pressure continues to rise. Few self-assessment devices, however, have been validated against recognised protocols. The aim of this study was to validate the Omron MX3 Plus (model HEM-742-E) oscillometric blood pressure measuring device in accordance with the international protocol of ...
Blew Brian D M - - 2005
BACKGROUND AND PURPOSE: The Peditrol is a novel hands-free irrigation device that delivers a bolus of irrigant through the ureteroscope when the foot pedal is deployed. The purpose of this study was to compare the flow and pressures created by the Peditrol with those of commonly used methods of irrigation. ...
O'Donnell C P F - - 2005
BACKGROUND: Adequate ventilation is the key to successful neonatal resuscitation. Positive pressure ventilation (PPV) is initiated with manual ventilation devices via face masks. These devices may be used with a manometer to measure airway pressures delivered. The expiratory tidal volume measured at the mask (V(TE(mask))) is a good estimate of ...
Battisti Anne - - 2005
OBJECTIVE: Inspiratory pressure (Pi) support delivered by a bilevel device has become the technique of choice for noninvasive home ventilation. Considerable progress has been made in the performance and functionality of these devices. The present bench study was designed to compare the various characteristics of 10 recently developed bilevel Pi ...
Sims A J - - 2005
PRIMARY OBJECTIVE: To measure the repeatability and pressure pulse envelope of simulators used for testing oscillometric non-invasive blood pressure (NIBP) devices; to study the effect of different envelopes on NIBP devices, and to measure the difference between NIBP devices due to different oscillometric algorithms. METHODS: Three different models of NIBP ...
Jilek Jiri - - 2005
Most noninvasive blood pressure (NIBP) devices use the oscillometric method. Published studies of oscillometric methodology introduced varied algorithmic approaches for determination of systolic (SBP), diastolic (DBP), and mean arterial (MAP) blood pressures. While there is a general agreement about MAP determination, controversy exists about the determination of SBP and DBP ...
Müller-Hülsbeck Stefan - - 2005
PURPOSE: To determine the extent of vessel wall damage caused by cerebral protection devices designed for carotid angioplasty by using ex vivo porcine carotid arteries. MATERIALS AND METHODS: The local animal experimentation committee did not require its approval for this study. With a benchtop vascular model (flow rate, 470 mL/min; ...
Sims A J - - 2005
Automated non-invasive blood pressure measuring devices based on the oscillometric technique are used widely for self-measurement and are often used in clinics in place of the manual, auscultatory method. Oscillometry was originally developed for monitoring purposes and there are questions over its suitability for making diagnostic measurements. This study measured ...
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