Search Results
Results 451 - 500 of 1079
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Baccelli G - - 1997
The effects of arteriosclerosis obliterans on the hemodynamic changes that occur during walking are largely unknown. For this reason, the authors measured blood pressure by transducer from the posterior tibial artery and vein at both ankles in 23 patients with arteriosclerosis obliterans of different severity and at the left ankle ...
Widdop R E - - 1997
1. The non-invasive measurement of tail cuff systolic blood pressure in conscious rats is routinely used in long-term cardiovascular studies. There are a number of commercially available tail cuff systems, however, these apparatus are generally expensive and are dedicated for single-task operations. In the present study, a simple method for ...
de Graaf P M - - 1997
Continuous records of arterial blood pressure can be obtained non-invasively with Finapres, even for periods of 24 hours. Increasingly, storage of such records is done digitally, requiring large disc capacities. It is therefore necessary to find methods to store blood pressure waveforms in compressed form. The method of selection of ...
Drouin E - - 1997
The feasibility of using a Finapres device to reproduce the beat to beat signal of arterial blood pressure in eight neonates was assessed and compared with intra-arterial measurement of arterial blood pressure in the umbilical artery, using a catheter. The two methods gave similar results. Continuous recording of arterial blood ...
Brinton T J - - 1997
The ability not only to record automated systolic and diastolic pressure, but also to derive measurements of the rate of pressure change during the cardiac cycle, would have great potential clinical value. A new method has been developed to obtain pressure measurements at 20-ms intervals by oscillometric cuff signal pattern ...
Zorn EA - - 1997
BACKGROUND: Arterial tonometry is a noninvasive technique for monitoring the arterial blood pressure in a continuous manner. Real-time arterial blood pressure measurements are advantageous in many clinical settings, but arterial tonometric devices must be validated prior to clinical acceptance. Guidelines for accuracy for noninvasive blood pressure monitors have been established ...
Branson K R - - 1997
(1) To determine the usefulness of one specific oscillometric monitor for making indirect measurements of arterial pressure in cats. (2) To determine the difference between two specific cuff placement sites. (3) To determine if clipping the hair beneath the cuff has an affect on the accuracy of oscillometric blood pressure ...
Voogel A J - - 1997
Modelflow is a method that determines stroke volume (SV) from central or peripheral continuous blood pressure signals. Pulsewaves are changed along the arterial tree; distortion occurs as the mean pressure level gradually declines. These changes might jeopardize the determination of SV from a distal measurement site. Techniques have been assessed ...
Lundstedt J L - - 1997
BACKGROUND: Pulmonary artery waveforms fluctuate because of changes in intrathoracic pressure caused by respirations. Monitoring system algorithms determine digital displays of pressure measurements on the basis of recognition, analysis, and comparison of consecutive waveforms. OBJECTIVE: To compare three methods of measuring pulmonary artery pressure during mechanical ventilation and spontaneous breathing ...
Ristuccia H L - - 1997
Finapres finger blood pressure monitoring appears to provide a reliable alternative to intra-arterial blood pressure measurement under many circumstances. However, few studies have focused on the limitations of Finapres assessment. In a previous pilot investigation, we observed that Finapres pressure following mental stressors failed to return to initial resting levels. ...
Ubbink D T - - 1997
OBJECTIVE: The European Consensus Document (ECD) defines critical ischaemia (CI) according to clinical (Fontaine) and blood pressure parameters. However, clinical symptoms may be non-specific and CI may exist without severely reduced blood pressures. This study prospectively investigated the additive value of transcutaneous oxygen tension (pO2) and toe blood pressure measurements ...
Blebea J - - 1997
OBJECTIVE: To evaluate the usefulness of a portable, computer-based, oscillometric, noninvasive blood pressure monitor for the automatic surveillance of postoperative infrainguinal bypasses. DESIGN: Prospective unblinded study. SETTING: Regional tertiary care Veterans Affairs medical center. PATIENTS: A total of 60 limbs were examined in 3 groups (n = 20 in each ...
Moniaci V - - 1997
Blood pressure measurements are a common indicator of cardiovascular status. The two most frequently used methods of obtaining this measurement in the NICU are direct measurement using an umbilical arterial catheter and indirect measurement with a cuff. Cuff values obtained from the upper arm or thigh are reported to correlate ...
Tochikubo O - - 1997
OBJECTIVE: To measure blood pressure accurately, by developing a new algorithm and an indirect method employing a non-elastic cuff with a photosensor. DESIGN AND METHODS: A non-elastic cuff was wrapped around the brachium. A reflecting plate (10 mm x 40 mm) was sited on the inner central part of the ...
Griffin S E - - 1997
This review summarizes research dealing with the validity of commonly used methods for measuring systemic blood pressure during exercise. Arterial blood pressures measured from within peripheral arteries exaggerate systolic blood pressures because of wave form reflection but provide representative mean and diastolic pressures of the central arterial circulation. Manual and ...
Maricq H R - - 1996
OBJECTIVE: To define differences in digital vascular responses to cooling and to determine their usefulness for the differential diagnosis of 4 groups of subjects: patients with primary Raynaud's phenomenon (RP) (n = 96), patients with RP associated with scleroderma (systemic sclerosis, SSc) spectrum disorders (SSc spectrum RP) (n = 108), ...
Green D W - - 1996
A clinical and statistical comparison of systolic, mean and diastolic arterial blood pressures was made between a non-invasive technique using a neonatal oscillometric blood pressure monitor attached to the thumb versus an invasive technique using a catheter inserted into the ipsilateral radial artery in 18 patients undergoing general anaesthesia for ...
Quaal S J - - 1996
IAB counterpulsation poses specific nursing issues and challenges. The patient's arterial pressure reference points are expanded to five components as opposed to the usual systole and diastole. It is, therefore, crucial that procedures be developed that address issues such as computation of mean arterial pressure and documentation and titration of ...
Meurs K M - - 1996
The indirect oscillometric method of blood pressure measurement was compared to the direct arterial puncture method in 15 anesthetized dogs, divided into three weight groups, undergoing a variety of surgical procedures. The objectives of this study were to determine the accuracy of the indirect oscillometric method at a single point ...
Dixon R M - - 1996
Non-invasive methods for assessment of the vascular effects of antimigraine drugs were evaluated with respect to their utility, variability and sensitivity in a double-blind, placebo-controlled, three-period crossover study in six healthy volunteers using an intravenous vasoconstrictor, methoxamine, as a probe drug. Changes in the internal diameter of the brachial and ...
Singer A J - - 1996
BACKGROUND: Although a large interarm blood pressure difference is assumed to help identify patients with aortic dissection, the degree of normal interarm blood pressure variation has not been well defined. METHODS: To determine the normal variation in bilateral upper-extremity blood pressure measurements, we conducted a prospective observational study on a ...
Sun M - - 1996
The SpaceLabs Medical oscillometric blood pressure monitor was evaluated in both neonatal and adult populations according to the 1992 AAMI SP-10 standard for electronic or automated sphygmomanometers. For the neonatal study, the umbilical artery pressure was used as a reference. Fifteen newborn ICU patients were enrolled in the study, yielding ...
Jagomägi K - - 1996
The present study compares two different methods for non-invasive beat-to-beat finger arterial blood pressure monitoring. The measurements using the volume clamp method (FINAPRES, Ohmeda, USA) were compared with measurements applying the differential oscillometric method (UT9201 device, University of Tartu). 13 healthy volunteers were studied at rest, during head-up tilt (HUT) ...
Wonka F - - 1996
OBJECTIVE: To test a semi-automatic oscillometric blood pressure measurement device with a wrist cuff. METHODS: Two different test methods, partly based on European and American standards for clinical investigation of non-invasive sphygmomanometers, were worked out and compared. Mostly German guidelines were considered. The reference measurement was always performed using the ...
Ursino M - - 1996
A mathematical lumped parameter model of the oscillometric technique for indirect blood pressure measurement is presented. The model includes cuff compliance, pressure transmission from the cuff to the brachial artery through the soft tissue of the arm, and the biomechanics of the brachial artery both at positive and negative transmural ...
Michell AR - - 1996
OBJECTIVE: To examine the effect of applying to human blood pressure readings the standard veterinary method for dogs. DESIGN, SUBJECT AND METHODS: The standard method for dogs uses the mean of five readings after rejection of the initial reading. The canine technique was applied to a human and readings for ...
Arabidze GG - - 1996
In 1905 Nicolay Korotkoff described the auscultatory technique of blood pressure measurement, which developed into and still remains the standard in clinical medicine. This review article retraces in short the history of indirect blood pressure measurement and Korotkoff's biography. This historical perspective illustrates how progress in science is achieved by ...
Torrance C - - 1996
An observational study was conducted looking at blood pressure measurement, in a mock-clinical situation, by Project 2000 students nearing the end of their Common Foundation Programme. The observation schedule looked for compliance with published guidelines for blood pressure determination. The results indicate little compliance with guidelines. Only 6% of the ...
Block F E - - 1996
The use of automatic noninvasive blood pressure (NIBP) devices has become a common technique to monitor blood pressure intraoperatively. The usual cuff placement for these devices on the upper arm sometimes poses problems. As an alternative, many clinicians place the cuff on the ankle. This practice has not been previously ...
Lee T K - - 1996
OBJECTIVE: Noninvasive blood pressure measured from the superficial temporal artery has been shown to correlate well with pressure in the brachial artery. The supraorbital artery may be an even better site for monitoring blood pressure on the forehead because it originates from the internal carotid artery, and it is easier ...
Samuelsson P - - 1996
We evaluated a novel, simple non-invasive method to assess systolic arterial toe pressures (ATP). It was employed in 63 subjects, of which 37 had suspected or established lower extremity arterial disease (LEAD) and 26 did not. 48 of the subjects had diabetes and 15 were non-diabetic. Pulsatile toe blood flow ...
Wiinberg N - - 1996
OBJECTIVES: To investigate the compatibility between oscillometric and auscultatory methods, and to determine whether one is preferable over the other for ambulatory 24 h blood pressure monitoring. METHODS: For the blood pressure monitoring system we used an A&D TM 2421 device (Takeda), which enabled us to measure the blood pressure ...
Anzal M - - 1996
Pseudohypertension (PHT) could lead to the initiation of unnecessary antihypertensive treatment and potentially adverse consequences. The Finapres is reported to be a reliable alternative to intra-arterial blood pressure (BP) measurements and is unlikely to be distorted by arterial calcification, suggested to be a cause of PHT. Finapres measurements were compared ...
Hussain A - - 1996
This survey assessed the measurement of blood pressure and use of sphygmomanometers by general practitioners in Humberside and Yorkshire in 1988. All registered practitioners were sent a questionnaire--1223 (58%) returned it completed. Their responses showed that 269 (22%) had an aneroid sphygmomanometer only, and that 120 (10%) had a random ...
Bos WJ - - 1996
OBJECTIVE: To investigate why the forearm pressure rises above the systemic blood pressure upon the release of occluding cuff pressure during Riva-Rocci-Korotkoff blood pressure measurements and whether this overshoot could, as has been suggested, be used to predict the accuracy of Riva-Rocci-Korotkoff measurements in a certain patient. DESIGN AND METHODS: ...
Jones D - - 1996
OBJECTIVE In triage of patients in the emergency department, nurses can identify conditions such as elevated blood pressure that can lead to serious health problems. It is imperative that the method used to evaluate blood pressure is dependable and accurate. The introduction of new technology may yield results that are ...
Wattigney W A - - 1996
The Dinamap 845XT automatic blood pressure monitor, Dinamap 8100 (an update model), and two mercury sphygmomanometers were compared in 417 school-aged children examined in the spring of 1992 as part of the Bogalusa Heart Study. This study was conducted in the nearby community of Franklinton, Louisiana, to verify data obtained ...
Bodey A R - - 1996
Previous experience has shown that a non-invasive (indirect) technique using an oscillometric monitor in conjunction with a tail cuff makes routine clinical blood pressure measurement practicable in dogs. The relationship between indirect and direct readings has been evaluated in both anaesthetised and conscious dogs (Bodey and others 1994, 1996). In ...
Gross H - - 1996
An arm phantom for testing non-invasive blood pressure measuring instruments under reproducible and real conditions has been developed. Signal records, recorded on patients and validated by a reference method, are played into the instruments to be tested using a combination of an electro-pneumatic and an electro-acoustic converter. For each of ...
Gevers M - - 1996
OBJECTIVE: To perform further evaluation of the oscillometric device for neonatal arterial blood pressure (ABP) measurement, using a catheter-manometer system (CMS) for accurate intraarterial measurement. We aimed to describe the influence of the radial artery wave shape on oscillometric ABP determination, as pressure wave-shape influences the relationships between systolic arterial ...
Caspary L A - - 1996
Posturally induced microvascular constriction normally causes a decrease of transcutaneous oxygen pressure (tcPO2) and laser Doppler flux (LDF) measured on the forefoot at 37 degrees C. The authors used both methods to assess the vasoconstrictor response (VCR) in 31 patients with various degrees of peripheral arterial occlusive disease (PAOD) and ...
Alpert BC - - 1996
BACKGROUND: The Association for the Advancement of Medical Instrumentation (AAMI) has guidelines and standards for the performance and accuracy of automated blood pressure monitors.METHODS: We performed two validation studies for the CAS model 9010 oscillometric blood pressure monitor, one in children and adults using a sphygmomanometer-auscultation standard, and one in ...
Green L A - - 1996
OBJECTIVE: To determine the equivalence of auscultatory and oscillatory blood pressure measurements. SETTING: Inner-city prenatal clinic. PARTICIPANTS: Eighty-one women in their 2nd to 9th month of pregnancy. DESIGN: Participants were assessed for systolic and diastolic blood pressures on left and right arms using auscultatory (manual) and oscillatory (electronic) methods. A ...
Gizdulich P - - 1996
OBJECTIVE: Arterial pressure waveforms distort between brachial and finger arteries, causing differences mainly in systolic pressure. Distortion, reportedly, can be removed by applying a waveform filter to the finger pressure. DESIGN: We analysed the data from two studies that detected discrepancies in systolic tracking between Finapres and brachial pressures. The ...
Wesseling K H - - 1996
Finger arterial pressure measurement with Finapres has been available since a decade. Its availability has promoted at least 300 methodological and research papers over these years, outlining the usefulness and the limitations of the method and the device. Finapres is based on the volume clamp method of Peñáz and the ...
Lee B Y - - 1996
This study was designed to evaluate the accuracy and failure rates of automatically collected oscillometric ankle systolic pressures (Psys) and pulse volumes (Pvol) using a new algorithm as compared with Psys obtained by standard manual Doppler-and-cuff technique. One hundred ten consecutive patients at a vascular laboratory had brachial and ankle ...
Wonka F - - 1996
There is no general valid and thus no recognized standard method of evaluation for oscillometric blood pressure measurement. This applies in particular to the determination of blood pressure parameters-systolic, diastolic and mean blood pressure-using a cuff pressure oscillogram. For this reason- and given that today's users are faced with an ...
Mätzke S - - 1996
In a retrospective study 110 consecutive patients with 145 critically ischaemic legs were assessed. Based on a three-month follow-up the predictive values for leg survival of the ankle and toe pressure measurements were determined. 25% of the legs had been amputated. The ankle and toe pressures as well as the ...
Imholz B P - - 1996
BACKGROUND: The accurate recording of the blood pressure response to ergometry is of increasing interest in clinical practice, yet its measurement is susceptible to considerable error. We searched the literature for studies that describe devices designed for automated measurement of indirect blood pressure during dynamic exercise. As a possible alternative ...
Shapiro D - - 1996
Blood pressure is one of the most commonly recorded functions in physiology and medicine, and it has become a major variable in recent psychophysiological and behavioral medicine research. Many methods have been developed for the measurement of blood pressure in clinical, laboratory, and natural settings. The broad objectives of this ...
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