Search Results
Results 351 - 400 of 1078
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Jönsson B - - 2001
The objective of the study was to evaluate the validity of oscillometric systolic ankle pressure in symptomatic leg arterial occlusive disease. Ankle pressure measurements using oscillometric curves obtained using a standard 12-cm cuff with a specially designed device for signal processing were validated against the continuous wave (CW) Doppler technique. ...
Carser D G - - 2001
This prospective study aimed to investigate if there is a relationship between ankle brachial pressure index (ABPI) and brachial systolic pressure when measured using Doppler ultrasound. Sixty-two limbs (36 patients) in which arterial disease and diabetes mellitus could be excluded using published blood pressure and flow criteria were included in ...
Khan I U - - 2001
Elevation of the hand is recommended for all patients undergoing hand surgery to decrease the swelling in the hand. This study was designed to look at the effects of elevation of the hand on digital blood pressure at different elevation positions. Digital blood pressure was recorded using a digital plethysmograph ...
Curcie D J - - 2001
A linear filter was developed for decoding finger commands from volitional pressures distributed within the residual forelimb. Filter parameters were based on dynamic pressures recorded from the residual limb within its socket, during specific finger commands. A matrix of signal features was derived from eight-dimensional (8-D) pressure vectors, and its ...
Jagomägi K - - 2001
BACKGROUND: Finapres monitors and oscillometric sphygmomanometers are widely used in blood pressure measurements on the fingers. However, the reliability of finger blood pressure measurement devices still remains a matter of debate. DESIGN: The volume clamp and modified oscillometric methods for non-invasive beat-to-beat finger mean arterial pressure monitoring are compared during ...
Aylett M - - 2001
Sphygmomanometers are usually sold with a single cuff though some are supplied with a short cuff as standard and offer a longer one for larger arms. However, data on the differences in measurements taken with different cuffs applied to different sized arms are conflicting and this study set out to ...
Rahiala E - - 2001
We conducted a study on blood pressure (BP) measurements in 40 healthy children (aged 11.0 +/- 0.4 years), in 20 healthy students (18.8 +/- 0.9 years), and in 19 children with a history of coarctation (9.3 +/- 4.0 years). Both a standard sphygmomanometer and an oscillometric device (Dinamap, Critikon Inc, ...
Konings M K - - 2001
There is a growing interest in performing intravascular interventions guided by MR imaging--a technique which offers the possibility of flow measurements during the intervention. For a reliable assessment of the haemodynamic significance of a stenosis, the flow and the pressure decay within the stenosis should both be measured. We have ...
Lu W - - 2001
Using theoretical and experimental approaches, we examined whether blood pressure at the wrist can be accurately measured by a volume-oscillometric method using a small pad-type square cuff placed above the radial artery (RA). Nuclear magnetic resonance imaging of the wrist allowed us to determine the geometry of two-dimensional (2-D) finite-element ...
Pesola G R - - 2001
If there is a significant dichotomy between bilateral blood pressure determinations in both arms, it is often taken as a sign of some type of underlying pathology. We wished to evaluate what the normal variation might be for significant differences between blood pressures in both arms. Significant difference was arbitrarily ...
Quaal S J - - 2001
Pulmonary artery pressures and arterial pressures are important hemodynamic measurements utilized in clinical management decision making for critically ill patients. Studies have demonstrated a concerning rate of measurement error, often due to technical errors. Zeroing, leveling, and dynamic response testing are essential components of assuring the quality of measurements. This ...
Sadiq S - - 2001
We evaluated the accuracy of modern infrared photosensors (IPs) from a photoplethysmography (PPG) machine as flow detector in determining the systolic arterial pressures and ankle/brachial indices (ABIs) in comparison to the traditional continuous wave Doppler (Doppler) method. Pressures were obtained by placing an appropriate pneumatic cuff above the elbow and ...
Ahrens T S - - 2001
BACKGROUND: Techniques to measure pulmonary artery (PA) pressure waveforms include digital measurement, graphic measurement, and freeze-cursor measurement. Previous studies reported the inaccuracy of digital and freeze-cursor measurements. However, many of the previous studies were small and did not thoroughly examine the circumstances of when digital measurements might be inaccurate. OBJECTIVES: ...
Aris I B - - 2001
We developed a personal blood pressure monitoring system for patients with hypertension or hypotension. The system can be used to measure a patient's blood pressure at home and to transmit the data automatically to a hospital database via the Internet. The accuracy of blood pressure readings using the system was ...
van der Steen M S - - 2000
OBJECTIVES: To investigate the influence of different supine body positions on blood pressure measured by an ambulatory device. DESIGN AND METHODS: Twenty hypertensive and 20 normotensive subjects of a tertiary hospital outpatient clinic participated. Blood pressure was measured with an ambulatory blood pressure device while lying in the back, left ...
Cavelaars M - - 2000
BACKGROUND: Nocturnal blood pressure readings may be influenced by body position because of variation in the vertical distance between heart and cuff level. OBJECTIVES: To quantify the effect of body position on nocturnal blood pressure and to assess whether this effect influences the reproducibility of nocturnal blood pressure. PATIENTS AND ...
Burton J - - 2000
The mercury sphygmomanometer has been used to measure blood pressure for over a century (O'Brien 2000, Smith 2000), but due to the hazards associated with mercury spillage, there is increasing reliance on other methods, such as automatic oscillometric blood pressure monitors and aneroid sphygmomanometers. Within the theatre and recovery areas, ...
de Graaff J C - - 2000
The purpose of this study was to evaluate the clinical value and reproducibility of laser Doppler (LD) versus photoplethysmography (PPG) in the measurement of the systolic toe blood pressure. Toe blood pressure was measured in 60 patients in different stages of peripheral vascular disease with simultaneous digital sampling of PPG ...
McDermott M M - - 2000
We compared three commonly used methods of ankle/brachial index (ABI) calculation to determine their relative association with objective measures of leg functioning in peripheral arterial disease. The study design was cross-sectional; the setting was an academic medical center. The participants were 244 men and women, aged 55 years and older, ...
van Popele N M - - 2000
Oscillometric blood pressure devices tend to overestimate systolic blood pressure and underestimate diastolic blood pressure compared with sphygmomanometers. Recent studies indicate that discrepancies in performance between these devices may differ between healthy and diabetic subjects. Arterial stiffness in diabetics could be the underlying factor explaining these differences. We studied differences ...
Chen W - - 2000
A continuous noninvasive method of systolic blood pressure estimation is described. Systolic blood pressure is estimated by combining two separately obtained components: a higher frequency component obtained by extracting a specific frequency band of pulse arrival time and a lower frequency component obtained from the intermittently acquired systolic blood pressure ...
Zweiker R - - 2000
OBJECTIVE: Oscillometric measurement of blood pressure at the wrist is becoming a widely used method for detection of hypertension and its control by treatment. The objective of the present study was to evaluate accuracy and suitability of wrist measurement in a clinical routine setting. PATIENTS AND METHODS: A series of ...
Tsai F W - - 2000
Noninvasive measurements of limb systolic pressures are used routinely in the assessment of the severity of peripheral arterial disease, including the evaluation for critical limb ischemia. However, ankle pressures cannot be measured reliably in patients with medial calcification, which is especially common among patients with diabetes. Skin lesions on the ...
Jeelani N U - - 2000
BACKGROUND: Mmeasurement of ankle brachial pressure indices (ABPI) is important in the assessment of patients with peripheral vascular disease. METHODS: Thirty-one hospitals with a vascular surgeon were selected at random. A telephone questionnaire was completed to assess the method used for the measurement of ABPI. Following the survey, 14 patients ...
Simon A - - 2000
Despite its potential usefulness for assessing preclinical atherosclerosis and cardiovascular risk, the ankle/arm blood pressure index (AAI) has not yet been the matter of study evaluating its feasibility and reliability by nonspecialist doctors in a general population. This study was planned for two steps. In step 1, the measurement of ...
Hagander L G - - 2000
OBJECTIVE: To determine the effect of different sites and locally applied pressure on vibration thresholds. METHODS: Vibration thresholds were compared in 47 normal volunteers at 3 sites of the index finger (pulp, dorsum of the middle phalanx and nail) and at two sites of the great toe (dorsum of the ...
Alpert B S - - 2000
BACKGROUND: There are technical difficulties in accurately measuring blood pressure of individuals with varying arm and body sizes. OBJECTIVE: To perform validation testing with 109 children of a novel cuff that occludes the palm rather than the upper arm. METHODS: This cuff, the OscilloMitt made by CAS Medical Systems, Inc. ...
Marks L A - - 2000
BACKGROUND: It is well established that indirect measurements of blood pressure made with a standard 13cm-wide cuff are erroneously high for large arms and low for small arms. To correct for this error, the American Heart Association recommends adjusting cuff width to 40% of the arm's circumference. OBJECTIVE: To test ...
Self B P - - 2000
BACKGROUND: Acceleration (or G) induced arm pain may develop in centrifuge runs and in flight with low arm position and assisted pressure breathing during G (PBG) in combination with an extended coverage anti-G suit. To decrease this arm pain, pressurized sleeves and gloves were developed. METHODS: Eight subjects who earlier ...
Sarici S U - - 2000
OBJECTIVE: The necessity of taking only one randomized blood pressure measurement or averaging three repeated measurements and, the effects of various stages of the restful state and body position on blood pressure measurements obtained with the oscillometric technique were investigated in 138 healthy term newborns. METHODS: The Athena oscillometer was ...
Van Durme D J - - 2000
BACKGROUND: Despite widespread use, the accuracy of community-based automated blood pressure machines has been questioned. We sought to determine if these machines are as accurate and reliable as those obtained by a clinician with a mercury manometer. METHODS: We randomly selected 25 pharmacies and compared blood pressure readings obtained from ...
Raamat R - - 2000
Two different techniques for non-invasive beat-to-beat finger arterial blood pressure monitoring are compared in six healthy volunteers during local hand heating from 21 to 38 degrees C. The degree of peripheral vasoconstriction was established by recording the thumb pulp skin blood flow with a laser Doppler instrument. For time episodes ...
Amoore J N - - 2000
BACKGROUND: Oscillometric pressure is measured by analysing, in relation to the cuff pressure, low-amplitude cuff-pressure pulsations generated by each arterial pulse. The cuff pressure is sampled at the pulse rate, introducing measurement variations, which are compounded by artefactual pulses. OBJECTIVE: To study the consistency of measurements with and without artefacts ...
Brothers T E TE Department of Surgery, Medical University of South Carolina, Charleston, USA. - - 2000
Doppler-based measurement of the ankle: brachial index (ABI) has long been regarded as the standard by which to objectively quantify the degree of lower extremity arterial occlusive disease, but this method fails to account for the contribution of systemic blood pressure to actual limb perfusion. We hypothesized that the absolute ...
Miller R H - - 2000
Arterial blood pressure in cats can be measured by direct or indirect techniques. Most direct measurement techniques require sedation or anesthesia, which decreases blood pressure. The restraint and human intervention needed for indirect techniques cause blood pressure to increase. These limitations make the accurate assessment of blood pressure and the ...
Bur A - - 2000
OBJECTIVE: To evaluate the accuracy of oscillometric blood pressure measurement according to the relation between cuff size and upper-arm circumference in critically ill patients. DESIGN: Prospective data collection. SETTING: Emergency department in a 2,000-bed inner city hospital. PATIENTS: Thirty-eight patients categorized into three groups according to their upper-arm circumference (group ...
Jachertz G - - 2000
Systolic ankle artery pressure measured classically by cuff-manometry and Doppler ultrasound in patients with severely ischemic legs may be falsely elevated because of impaired compressibility of the arteries. We evaluated a hydrostatic blood pressure or so-called pole pressure test by correlating the ankle artery pressure as well as tcpO2 with ...
Ubbink D T - - 2000
OBJECTIVE: to assess the optimal cut-off values of toe blood pressure (TBP) and transcutaneous oxygen pressure (TcpO(2)) in the supine and sitting positions, in order to accurately detect the presence of severe leg ischaemia requiring invasive treatment. METHODS: in 49 consecutive patients (65 legs) with severe ischaemia according to clinical ...
Lee G W - - 2000
This study evaluated the cutaneous pressure threshold of subjects with and without a clinical diagnosis of brachial plexus compression in the thoracic inlet, usually termed thoracic outlet syndrome (TOS). Sixty-one subjects (102 arms) made up the control population; 11 subjects 120 arms) made up the TOS population. Assessment by two ...
Markandu N D - - 2000
Both in clinical practice and medical research, blood pressure is still largely measured by auscultation using a mercury sphygmomanometer. Blood pressure is the most important predictor of life expectancy. Treatment of high blood pressure reduces strokes, heart attack and heart failure. Accurate measurement is therefore essential. At a large London ...
Cavalcanti S - - 2000
An HDBPM oscillometric sphygmomanometer used for the automatic measurement of arterial blood pressure is evaluated according to the ANSI/AAMI SP10-1992 standard. The accuracy of the HDBPM is ascertained by comparing it against the standard Riva-Rocci ascultatory method. Following the ascultatory method, two independent observers use the HDBPM devise to simultaneously ...
Short J A - - 2000
A group of 50 children, aged 5 months to 15 years, and who were undergoing routine surgery under general anaesthesia, were studied to investigate the difference in noninvasive blood pressure readings obtained from inflatable cuffs placed on the upper arm and the lower leg. In contrast to adult data, it ...
Peräkylä T - - 1999
In order to assess two simple methods of evaluation of claudication, a standard questionnaire and visual analogue scale, a comparison was made between them and the post-exercise pressure index used as a gold standard. Fifty-eight consecutive stable claudicants were recruited to the study, 51/58 having arterial insufficiency according to post-exercise ...
Orme S - - 1999
OBJECTIVE: to establish the mean and normal range for the difference in simultaneous systolic and diastolic blood pressure measurements between the right and left arm. SUBJECTS: 462 subjects, age range 20-89 years, in sinus rhythm and with no history of stroke, 98 of whom had a history of cardiovascular disease ...
Pâhlsson H I - - 1999
OBJECTIVES: to evaluate if the pole test at the toe level can be used for assessment of arterial insufficiency in diabetic patients. METHODS: twenty-five legs in 23 diabetic patients suffering from leg ischaemia were examined prospectively. A laser Doppler probe was attached to the pulp of the first toe to ...
Eiken O - - 1999
It is well documented that exposure to high gravitational (G)-load in the head-to-foot direction may induce arm pain. Such G-induced arm pain is of vascular origin and caused by markedly increased pressure in the arm vessels. It has been hypothesized that the arm pain is due to pressure-induced overdistension of ...
Massey K A - - 1999
This study investigates several physiological measurements for their correlation to the minimal arterial occlusion pressure using the pneumatic ankle tourniquet. Blood pressure (brachial), height, weight, body fat percentage, ankle circumference, and leg circumference measurements were collected from 50 normotensive healthy subjects. Ankle brachial index (ABI) was also compared. A pneumatic ...
Kaiser V - - 1999
OBJECTIVES: to estimate the intra-observer variability of the measurement of the ankle-brachial systolic pressure index (ABPI) and to compare the reproducibility of the measurements by experienced vascular laboratory assistants and by less-experienced general practice personnel. DESIGN: repeated measurement of ABPI by general practitioners (GPs), GP-assistants and vascular laboratory assistants using ...
Williams A F - - 1999
Breast cancer-related lymphoedema is a chronic, progressive condition characterized by swelling in the arm and adjacent trunk, with changes to the skin and underlying tissues. The application of compression garments is an essential component in the long-term management of lymphoedema. A wide range of garments is available in the UK; ...
McLafferty R B - - 1999
The use of vibrating tools has been shown to cause Raynaud's syndrome (RS) in a variety of workers, including those who use chain saws, chippers, and grinders. The diagnosis of RS in workers who use vibrating tools is difficult to document objectively. We studied a patient cohort with RS caused ...
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