Search Results
Results 601 - 650 of 1068
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Carter S A - - 1992
Although changes in body temperature alter limb blood flow, little information exists on the effect of body heating and cooling on systolic pressures in limbs with arterial disease. Ten patients with stable claudication were studied. Mean ankle systolic pressure index during body cooling (0.79 +/- 0.04) exceeded (p less than ...
Jones R D - - 1992
Measurements from the upgraded Finapres 2300e continuous noninvasive blood pressure monitor, the Finapres 2300 and Colin oscillometric noninvasive blood pressure monitor were compared with invasive arterial line blood pressure readings. Fifteen young Chinese patients undergoing elective spinal surgery of more than 2 h duration had contemporaneous blood pressure measurements digitally ...
Bottini P B - - 1992
The evaluation and management of hypertension is based on indirect blood pressures obtained in the office (COBPs) using the mercury sphygmomanometer. The usefulness of COBPs is limited by factors such as observer bias, which confound the ability to discern the true blood pressure value. Automated portable monitors have been marketed, ...
Chester A E - - 1992
Systolic (SP), diastolic (DP), and mean arterial blood pressures (MAP) and pulse rate (PR) were recorded on treated and untreated conscious cynomolgus monkeys by the oscillometric method (Dinamap 1846SX/P). Each monkey was placed in a restraining tube with the cuff placed on the base on the shaved tail. Measurements were ...
Kurozawa Y - - 1992
Finger systolic blood pressure (FSBP) measurements after finger and body cooling using a strain-gauge plethysmograph is a useful objective test for diagnosing Raynaud's phenomenon (RP). Body cooling, however, is uncomfortable to subjects. In this study, the measurements of FSBP after finger cooling without body cooling, using Digitmatic DM2000 (Medimatic) combined ...
Bos W J - - 1992
Riva-Rocci Korotkoff (RRK) blood pressure measurements may overestimate the intra-arterial pressure (IAP) in individual patients. To study pseudohypertension, defined as an overestimation larger than 10 mm Hg, we compared RRK and IAP measurements in 76 patients. These patients were considered to be at risk for pseudohypertension because of high age, ...
Hatsell C P - - 1992
Cardiac cycle phase uncertainty causes a small error in indirect estimation of arterial blood pressure by sphygmomanometry. A simple analysis yields a statistical description of the error and a rule for its reduction: correct bias by adding to the systolic estimate and subtracting from the diastolic estimate one-half of the ...
Grandy J L - - 1992
The accuracy of the Doppler technique for indirect systolic blood pressure measurement was assessed in 16 anesthetized cats. Eight cats were anesthetized with isoflurane and 8 were anesthetized with halothane. Anesthetic depth and mode of ventilation were varied to obtain a wide range of arterial blood pressure. A Doppler transducer ...
Mundt K A - - 1992
Clinical and epidemiologic situations requiring repeated measurements of blood pressure in the lower extremity are increasingly incorporating automated measurement devices; however, no device has been validated adequately for ankle blood pressure. This study evaluates the Dinamap 1846 SX against Doppler ultrasound in determining ankle systolic blood pressure (SBP) and compares ...
Dellon E S - - 1992
Despite the need to evaluate sensibility for accurate diagnosis and the need to record the degree of sensation achieved in the postoperative period, the clinician has been without the ability to measure human pressure perception accurately. Traditionally, the Semmes-Weinstein monofilaments were used to measure the static one-point discrimination threshold. A ...
Harrison D W - - 1992
The performance of the Takeda Model UA-751 oscillometric blood pressure and pulse rate monitor was compared with readings taken using auscultatory technique and the mercury manometer. Significant correlations (p less than 0.0001) were found between the clinical standard and the UA-751 on measurements of systolic (r = 0.85) and diastolic ...
Høegholm A - - 1992
Takeda Medical (A & D) TM 2420 is an automatic ambulatory blood pressure monitoring system employing the auscultatory technique. The device was used under stable conditions and compared to readings from the Hawksley random-zero sphygmomanometer using a double headset stethoscope and a Y-connection. We tested 85 subjects (aged 13-89 years, ...
Scheffler A - - 1992
The mutual effects of systolic ankle arterial pressures, positional manoeuvres, and calf artery occlusions on transcutaneous oxygen partial pressures (tcpO2) were studied in 388 legs of 258 patients with peripheral arterial occlusive disease (PAOD). The tcpO2-vs-perfusion pressure relationship could be satisfactorily fitted by a non-linear regression model deduced from the ...
Donahue P - - 1992
A compartmental syndrome arises in situations where increased pressure within a limited space restricts the circulation by lowering the arteriovenous gradient and function of tissues within that space. Hypotension, hemorrhage, arterial occlusion, and limb elevation all appear to reduce the tolerance of limbs for increased tissue pressure. In early cases, ...
Gebuhr P - - 1992
Twenty-nine patients due to have a total hip replacement had their systemic systolic and segmental blood pressures measured prior to operation and 1 and 6 weeks postoperatively. No patients had signs of ischemia. The segmental blood pressure was measured at the ankle and at the toes. A significant drop was ...
Whincup P H - - 1992
STUDY OBJECTIVE: The aim was to compare the performance of the Dinamap 1846SX automated oscillometric blood pressure recorder with that of the Hawksley random zero sphygmomanometer during use under field study conditions. DESIGN: Two independent within subject measurement comparisons were made, one in adults and one in children, each conducted ...
Gabriel A - - 1992
The present study focuses on the accuracy in tracing fast beat-to-beat changes in blood pressure using a non-invasive technique. The measurements using a commercially available apparatus (Finapres, Ohmeda, USA) were compared to ipsilateral intra-arterial radial pressure. Eight patients were studied at rest, during deep breathing with a fixed rate of ...
Canterbury T D - - 1992
The lithotomy position is known to decrease venous blood flow and predispose to lower extremity venous thrombosis. However, arterial thrombosis secondary to surgical positioning has rarely been discussed. One hundred patients underwent measurements of their ankle-arm index, the ratio of their ankle systolic pressure compared to their brachial blood pressure, ...
Jacobs M J - - 1992
Systolic ankle and toe pressure measurements are considered to be the best way of documenting arterial occlusive disease. In the European consensus, chronic critical limb ischaemia is defined as persistent pain with an ankle pressure lower than 50 mmHg. To investigate the possible adjunct value of microcirculatory assessment, capillary microscopy ...
Wendel H - - 1992
The aim of the study was to compare invasive and non-invasive blood pressure measurements and gradients. Twenty-two children and 16 adults previously operated for coarctation of the aorta were included. Invasive blood pressures were recorded proximally and distally close to the former operation site and non-invasive systolic blood pressures were ...
Duprez D - - 1992
Patterns of release of lactate, hypoxanthine, and arginine into the bloodstream after a standardized treadmill test (twelve minutes, 1.6-2.8 mph, inclination 0,5,10,15%) were recorded in 21 consecutive patients with stage II peripheral arterial occlusive disease. Heart rate, systolic blood pressure, ankle blood pressure, and ankle/brachial systolic blood pressure ratio (A/B ...
Feher M - - 1992
A questionnaire survey, combined with an observational study, evaluated the knowledge of doctors in training grades on the practical aspects of blood pressure measurement. Eighty (non-consultant) junior hospital doctors, graduates from 30 separate medical schools, participated in the study. The results show that 27 (33%) doctors acknowledged no formal education ...
Latman N S - - 1992
Self-blood pressure monitoring can be critical in the management of hypertension, but it is often awkward and cumbersome. One attempt to improve the ease with which such measurements are made was the development of electronic, digital, automatic monitors for measurement of blood pressure in the finger. The purpose of this ...
Beinder E - - 1992
A technique is described for measuring digital and segmental systolic blood pressure by laser Doppler fluxmetry. A transparent plastic capsule contains the small sphygmomanometer cuff connected to a Statham manometer. It has a hole for positioning the probe at the very tips of fingers or toes. An advantage of this ...
Raftery E B - - 1991
The indirect method of blood pressure measurement is known to be potentially inaccurate, slow-moving and incapable of recognizing artefacts such as the 'alerting reaction'. This situation can be improved by repeated measurements, with, for example, ambulatory non-invasive measurement. Nevertheless, these clinic blood pressure measurements are known to supply very good ...
Keckeisen M - - 1991
Blood pressure measurement and management of the cardiac surgical patient do not appear to be simple processes. The critical care nurse needs to understand thoroughly the many technical and physiologic variables pertaining to the equipment used (i.e., cuff size, stethoscope placement, automated device cycling patterns, and monitoring system accuracy and ...
Lynch K - - 1991
Although highly accurate, contrast arteriography is a costly, invasive, and time-consuming method to rule out occult arterial damage in injured extremities. Accordingly the authors assessed the sensitivity and specificity of Doppler-derived arterial pressure measurements in trauma victims undergoing evaluation for possible extremity arterial damage. Arterial pressure index (API) was calculated ...
Farquhar I K - - 1991
Continuous noninvasive blood pressure measurement is of great potential use in the critically ill. This study was designed to find out whether measurements of blood pressure by a Finapres accurately represented intra-arterial pressure. Comparisons were made between readings from a radial artery line and from a Finapres finger cuff in ...
Epstein R H - - 1991
The Finapres is a noninvasive monitor that continuously displays the arterial waveform, pulse rate, and systolic, mean, and diastolic blood pressure. We determined its bias (mean prediction error) and precision (mean absolute error), relative to directly measured radial arterial blood pressure, in 16 otherwise healthy patients undergoing spinal fusion surgery ...
Weaver L K - - 1991
We describe a noninvasive method of monitoring blood pressure in the monoplace hyperbaric chamber. A standard blood pressure cuff was placed on the patient's arm. A Doppler probe, linked to an ultrasonic Doppler flow detector outside the chamber, was secured over the patient's radial artery. Cuff inflation tubing and the ...
Frank S M - - 1991
To identify a relationship between atherosclerotic vascular disease and differences in blood pressure between the right and left arms, blood pressure differences between arms were measured in patients with peripheral vascular disease (PVD, n = 58), in patients with coronary artery disease (CAD, n = 38), and in patients with ...
Canner P L - - 1991
Blood pressure variability is an important consideration in hypertension trials for determining required sample size and consequently making accurate outcome statements. The Hypertension Prevention Trial was a randomized controlled trial carried out in 1983-1986 in four US clinics on men and women with high normal diastolic blood pressure. This trial ...
Pace N L - - 1991
In 30 patients (15 with normal peripheral vascular status and 15 with peripheral vascular disease, hypertension, or a heavy smoking history), systolic, mean, and diastolic arterial pressures were recorded simultaneously every 5 min using a radial arterial catheter, an oscillometric arm cuff, and a Finapres finger cuff during 1-6 h ...
Kemmotsu O - - 1991
Arterial tonometry is a technique used to measure arterial blood pressure noninvasively. The authors developed a new tonometer system containing an array of 15 piezoresistive pressure transducers, a mechanical positioning system, signal conditioning and multiplexing electronics, and a display and control console. The authors evaluated the accuracy, reliability, and clinical ...
Block F E FE - - 1991
Most commercial noninvasive blood pressure devices use the oscillometric method for determination of blood pressure. The Ohmeda 2120 noninvasive blood pressure monitor uses the oscillometric technique, but it also includes a "Sys Stat" mode for rapid determination of systolic blood pressure up to ten times per minute. This Sys Stat ...
Kemmotsu O - - 1991
A newly developed arterial tonometer enabled us to measure the blood pressure waveforms in addition to determining systolic and diastolic pressures noninvasively and continuously. Twenty-eight adult patients undergoing orthopedic surgery under controlled hypotension were studied. Systolic blood pressure was reduced to two-thirds of baseline values with an infusion of nitroglycerin ...
Stokes D N - - 1991
A comparison was made of arterial pressures measured invasively from a radial arterial cannula and non-invasively from the middle finger using the 2300 Finapres (Ohmeda) during induction and maintenance of anaesthesia. Digital outputs of both pressures were captured directly onto computer hard disk; data recorded during flushing of the arterial ...
Kuwahara M - - 1991
We evaluated a recently developed tail-cuff apparatus for the indirect blood pressure measurement in rats with special reference to the effects of ambient temperature. For this purpose, we designed two preparations 1) an intact preparation to determine the effect of ambient temperature on blood pressure measurements and 2) an anesthetized ...
Sidery M B - - 1991
Three non-invasive instruments were used to measure blood pressure in the supine position and on tilting--a conventional and a random-zero sphygmomanometer, and an oscillometric device (Accutorr 1A). Twenty normotensives volunteered for the study. There was no statistically significant difference in systolic blood pressure and diastolic blood pressure measured by the ...
Stoffers J - - 1991
One of the non-invasive techniques used in the diagnosis of patients with peripheral arterial occlusive disease is the measurement of the Ankle-Arm Systolic Pressure Ratio ("AA-Ratio"). The magnitude of different sources of measurement variation, relevant to clinical practice as well as multi-observer studies, was estimated from a random effects analysis ...
Kurozawa Y - - 1991
To assess the severity of vibration-induced white finger (VWF), finger systolic blood pressure (FSBP) after finger cooling and after combined finger and body cooling was measured by strain-guage plethysmography for 100 vibration-exposed men and 22 healthy men. The exposed men were classified as being without VWF (EW), with mild VWF ...
Dietz U - - 1991
In order to measure blood pressure noninvasively, the second derivative of the low frequency wall movements of the brachial artery were registered with a piezo-electric pressure probe during deflation of a Riva-Rocci cuff along with the actual cuff pressure. Two characteristic phenomena of this signal have been suggested to reflect ...
Kobler H - - 1991
1. Finger cuff blood pressure monitors that provide continuous presentation of arterial pressure at the finger are available. 2. The operation of such instruments is based on 'clamping' arterial volume under a pressurized encircling cuff applied to a digit. Blood volume is detected by measuring infra-red transmission across the finger. ...
McConnel F M - - 1991
The fact that pressures in the pharynx are asymmetric has raised questions about the validity of measurements made using manofluorography. Using a special manometric catheter that measures the pressures in four different directions, manofluorography was performed on seven normal volunteers and the measurements in the four directions were compared. When ...
Gibbs N M - - 1991
The Finapres (FIN) is a new noninvasive blood pressure monitor that provides continuous arterial waveform display with the use of a finger cuff. The authors assessed the accuracy of FIN mean arterial pressure (MAP) measurements relative to simultaneous direct radial arterial pressures in 20 patients undergoing general anesthesia for major ...
Sawyer D C - - 1991
This study was conducted to determine whether blood pressures and pulse rate could be determined accurately by indirect measurements from the front and hind legs of 15- to 40-kg dogs anesthetized with isoflurane. Indirect measurements from each animal were compared to direct measurements obtained from a catheter placed into the ...
Boone T - - 1991
This study compares the effects of different arm positions on blood pressure during vertical head-down ankle suspension. Eighteen healthy volunteers (10 men and 8 women, aged 20-30 years) were placed first in the upright sitting position for 4 min, and second in the head-down suspension position for 4 min. In ...
Imholz B P - - 1991
The clinical utility for autonomic research purposes of the Finapres, a device for measuring finger arterial pressure continuously and noninvasively, was assessed by estimating its accuracy, precision and within-subject variability in 48 subjects, aged 18-65 years, in comparison with intraarterial brachial blood pressure. At differences of -3.5 +/- 12, -8.0 ...
Norman E - - 1991
Blood pressure values were evaluated in 30 acute adult trauma patients using two indirect methods, the bell and diaphragm components of the stethoscope, and one direct arterial method. K1, K4, and K5 measurements were taken 4 to 72 hours (M = 30) after admission when vital signs had stabilized. Data ...
Murray W B WB Department of Anaesthetics, University of Natal, - - 1991
A reasonable correlation exists between invasive and non-invasive methods of measuring systemic blood pressure. However, there are frequent individual differences between these methods and these variations have often caused the validity of the non-invasive measurement to be questioned. The hypothesis that certain invasive systolic blood pressures may represent a pressure ...
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