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cuff inflation measurements

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https://www.readbyqxmd.com/read/29135491/agreement-analysis-of-oscillometric-devices-in-the-measure-of-resting-heart-rate-in-breast-cancer-survivors
#1
Mariana R Palma, Luiz C M Vanderlei, Fernanda E Ribeiro, Rafaela C C de Andrade, Cristina E P T Fregonesi, Ismael F Freitas Júnior, Diego G D Christofaro
OBJECTIVE: The aim of this study was to verify the reproducibility of an oscillometric device in the measurement of resting heart rate (RHR) in breast cancer survivors. METHODS: This study included 85 breast cancer survivors with a mean age of 58.87±10.03 years. For the RHR evaluation, the equipment used was the Omron HEM 742, electronic and digital arm device, for measurement of blood pressure and heart rate (HR), with automatic cuff inflation and deflation. At the same time as the oscillometric measurement, HR was measured by the HR monitor Polar RS800 CX, which has been validated previously for HR uptake...
November 10, 2017: Blood Pressure Monitoring
https://www.readbyqxmd.com/read/29131250/effects-of-remote-ischemic-preconditioning-on-myocardial-injury-and-endothelial-function-and-prognosis-after-percutaneous-coronary-intervention-in-patients-with-acute-coronary-syndrome
#2
F-Z Zhou, W Song, L-H Yin, Z-F Song, S Yang, F-B Yang, J-F Liu, Y-G Song, H-Y Zhang, Z-M Zhang
OBJECTIVE: To explore the effects of remote ischemic preconditioning on myocardial injury and prognosis after percutaneous coronary intervention (PCI) in patients with acute coronary syndrome. PATIENTS AND METHODS: The study was a single center, prospective, randomized, controlled study. A total of 184 patients with unstable angina undergoing elective PCI were randomly assigned to remote ischemic preconditioning group (induced by four times of 5-min inflations of a blood pressure cuff to 200 mmHg around the upper arm, followed by 5-min intervals of reperfusion at 1 h before PCI therapy) or control group (an uninflated cuff around the arm)...
October 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29118964/development-of-a-blood-pressure-measurement-instrument-with-active-cuff-pressure-control-schemes
#3
Chung-Hsien Kuo, Chun-Ju Wu, Hung-Chyun Chou, Guan-Ting Chen, Yu-Cheng Kuo
This paper presents an oscillometric blood pressure (BP) measurement approach based on the active control schemes of cuff pressure. Compared with conventional electronic BP instruments, the novelty of the proposed BP measurement approach is to utilize a variable volume chamber which actively and stably alters the cuff pressure during inflating or deflating cycles. The variable volume chamber is operated with a closed-loop pressure control scheme, and it is activated by controlling the piston position of a single-acting cylinder driven by a screw motor...
2017: Journal of Healthcare Engineering
https://www.readbyqxmd.com/read/29082595/cutaneous-reactive-hyperaemia-is-unaltered-by-dietary-nitrate-supplementation-in-healthy-humans
#4
Brett J Wong, Jeremy T Keen, Erica L Levitt
The purpose of this study was to determine whether nitrate supplementation augments cutaneous reactive hyperaemia. Seven participants were tested pre- and postnitrate supplementation (25 ml beetroot juice); participants consumed one shot per day for 3 days. Participants were instrumented with two microdialysis fibres: control (Ringer's solution) and NO synthase inhibition (20 mM L-NAME). Skin blood flow was measured via laser-Doppler flowmetry (LDF). A blood pressure cuff was placed on the experimental arm and inflated to 250 mmHg for 5 mins to occlude arterial inflow...
October 29, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/29080792/impact-of-shear-rate-pattern-on-post-occlusive-near-infrared-spectroscopy-microvascular-reactivity
#5
M Ramos Gonzalez, J T Caldwell, P A Branch, G C Wardlow, C D Black, J Campbell, R D Larson, C J Ade
The primary aim of the present study was to determine the impact of acute changes in shear rate patterns, in particular retrograde shear rate, on microvascular function in 15 healthy, young men and women as determined via the post-occlusive near-infrared spectroscopy (NIRS) microvascular reactivity response. Microvascular reactivity, via NIRS-derived measurements of post-occlusion tissue saturation index (TSI%) and total microvascular hemoglobin+myoglobin concentration ([Hb]total), were assessed in each participant before and immediately after exposure to a 30min retrograde shear treatment...
October 31, 2017: Microvascular Research
https://www.readbyqxmd.com/read/29065242/ageing-of-the-venous-valves-as-a-new-risk-factor-for-venous-thrombosis-in-the-elderly-the-batavia-study
#6
A Karasu, A Šrámek, F R Rosendaal, R J van der Geest, A van Hylckama Vlieg
BACKGROUND: Increasing age is the strongest risk factor for venous thrombosis (VT). Increasing age has been related to a thickening of the venous valves and a decreased valvular function. The association between valve thickness and the risk of VT is not known. OBJECTIVES: To assess the association between increased valve thickness and valve closure time (VCT) and the risk of VT. METHODS: Analyses were performed in the BATAVIA study, including 70 cases aged 70+ with a first VT and 96 controls...
October 24, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/29063658/physiological-augmentation-of-esophageal-distension-pressure-and-peristalsis-during-conditions-of-increased-esophageal-emptying-resistance
#7
G J Brink, W Y Lei, T I Omari, M M J Singendonk, J S Hung, T T Liu, C H Yi, C L Chen
BACKGROUND: Abdominal compression has been implemented as a provocative maneuver in high-resolution impedance manometry (HRIM) to "challenge" normal esophageal physiology with the aim of revealing abnormal motor patterns which may explain symptoms. In this study, we measured the effects of abdominal compression on esophageal functioning utilizing novel pressure-impedance parameters and attempted to identify differences between healthy controls and globus patients. METHODS: Twenty-two healthy volunteers (aged 23-32 years, 41% female) and 22 globus patients (aged 23-72 years, 68% female) were evaluated with HRIM using a 3...
October 24, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29060146/implementation-of-a-manually-operated-blood-pressure-monitor-based-on-energy-harvesting-for-use-in-resource-constrained-settings
#8
Martin Gruterich, Paul Aelen, Kees Wouters, Kiran Dellimore
Health workers who screen for hypertension in rural and resource-constrained settings face many challenges including limited training, difficulties in correctly performing blood pressure (BP) measurements, and electrical grid unreliability. The aim of this study is to present the implementation of a manually operated BP monitor which assists health workers in overcoming some of these challenges by harvesting energy during manual cuff inflation and then discharging it in a controlled manner to power BP data acquisition, storage and wireless transmission...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060136/estimation-of-peripheral-blood-volume-and-interstitial-volume-in-hemodialysis-patients-using-bioimpedance-techniques
#9
Fansan Zhu, Peter Kotanko, Nathan W Levin
This paper describes a method to estimate interstitial fluid volume and peripheral blood volume (BVP) in hemodialysis (HD) patients using whole body (wBIS) and calf (cBIS) bioimpedance spectroscopy techniques. The aim of this study was to evaluate the usefulness of the technique. Thirty five HD patients were studied pre and post HD. Extracellular volume (ECV) and total body water (TBW) were measured using wBIS and cBIS. The calf resistances at 5 kHz (R5) and at 1000 kHz (R1000) respectively reflect ECV and TBW in the calf...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29027587/correlation-between-endothelial-dysfunction-and-myocardial-damage-in-acute-phase-of-tako-tsubo-cardiomyopathy-brachial-flow-mediated-dilation-as-a-potential-marker-for-assessment-of-patient-with-tako-tsubo
#10
Rosa Carbonara, Francesco Giardinelli, Martino Pepe, Giovanni Luzzi, Immacolata Panettieri, Vito Vulpis, Alessandro Santo Bortone, Marco Matteo Ciccone
Takotsubo cardiomyopathy (TTC) is characterized by transient systolic ventricular dysfunction. It is supposed to be caused by a cathecolaminergic wave which leads to myocardial stunning through a massive action on beta2-adrenoreceptor. Moreover, beta2-receptor hyperactivity negatively influences endothelial function. It can be detected by brachial flow mediated dilation (b-FMD) which assesses endothelium regulated vasomotility. The study aim is to analyze the b-FMD variability during hospitalization in 50 patients admitted with TTC...
October 13, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/29018632/patient-specific-oscillometric-blood-pressure-measurement-validation-for-accuracy-and-repeatability
#11
Jiankun Liu, Hao-Min Cheng, Chen-Huan Chen, Shih-Hsien Sung, Jin-Oh Hahn, Ramakrishna Mukkamala
Oscillometric devices are widely used for automatic cuff blood pressure (BP) measurement. These devices estimate BP from the oscillometric cuff pressure waveform using population average methods. Hence, the devices may only be accurate over a limited BP range. The objective was to evaluate a new patient-specific method, which estimates BP by fitting a physiologic model to the same waveform. One-hundred and forty-five cardiac catheterization patients and normal adults were included for study. The oscillometric cuff pressure waveform was obtained with an office device, while reference BP was measured via brachial artery catheterization or auscultation, during baseline and/or nitroglycerin administration...
2017: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/28980297/remote-ischemic-preconditioning-of-human-myocardium-ripe-study-protocol-for-a-double-blinded-randomized-controlled-trial
#12
Marek A Deja, Ryszard Wiaderkiewicz, Piotr Czekaj, Ewa Czech, Marcin Malinowski, Leszek Machej, Andrzej Węglarzy, Adam Kowalówka, Magda Piekarska, Bartosz Szurlej, Tomasz Latusek
BACKGROUND: Remote preconditioning was showed to be a potent protective phenomenon in many animals. Several studies aimed to demonstrate it was feasible in humans by trying to show its protective effect during cardiac surgery. Of these studies some small studies and one bigger trial were positive while two other bigger studies showed no effectiveness of remote preconditioning as assessed by levels of postoperatively released cardiac markers. Recently two large clinical trials also failed to prove the benefit of remote preconditioning in cardiac surgery...
October 5, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28972197/coherent-averaging-of-pseudorandom-binary-stimuli-is-the-dynamic-cerebral-autoregulatory-response-symmetrical
#13
Emmanuel Katsogridakis, David M Simpson, Glen Bush, Lingke Fan, Anthony A Birch, Robert Allen, John F Potter, Ronney B Panerai
Previous studies on cerebral autoregulation have shown the existence of hemispheric symmetry, which may be altered in stroke and traumatic brain injury. There is a paucity of data however on whether the response is symmetrical between those disturbances that cause cerebral hyperperfusion, to those that cause hypoperfusion. Our aim was to investigate whether the responses of cerebral autoregulation to haemodynamic stimuli of different directions are symmetrical. Approach: Using a previously described assessment method, we employed coherent averaging of the cerebral blood flow velocity (CBFV) responses to thigh cuff inflation and deflation, as driven by pseudorandom binary sequences, whilst simultaneously altering the inspired CO2...
October 3, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28704612/blood-flow-in-humans-following-low-load-exercise-with-and-without-blood-flow-restriction
#14
J Grant Mouser, Gilberto C Laurentino, Scott J Dankel, Samuel L Buckner, Matthew B Jessee, Brittany R Counts, Kevin T Mattocks, Jeremy P Loenneke
Blood flow restriction (BFR) in combination with exercise has been used to increase muscle size and strength using relatively low loads (20%-30% 1-repetition maximum (1RM)). In research, the range of applied pressures based on a percentage of arterial occlusion pressure (AOP), is wide. The purpose of the study is to measure the blood flow response before exercise, following each set of exercise, and postexercise to low-load elbow flexion combined with no restriction (NOBFR), 40% of AOP (40BFR), and 80% of AOP (80BFR)...
July 13, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28611883/altitude-related-change-in-endotracheal-tube-cuff-pressures-in-helicopter-ems
#15
Stacy N Weisberg, Jonathan C McCall, Joseph Tennyson
INTRODUCTION: Over-inflation of endotracheal tube (ETT) cuffs has the potential to lead to scarring and stenosis of the trachea.1, 2,3, 4 The air inside an ETT cuff is subject to expansion as atmospheric pressure decreases, as happens with an increase in altitude. Emergency medical services helicopters are not pressurized, thereby providing a good environment for studying the effects of altitude changes ETT cuff pressures. This study aims to explore the relationship between altitude and ETT cuff pressures in a helicopter air-medical transport program...
June 2017: Western Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28536897/validation-of-myocardial-perfusion-quantification-by-dynamic-ct-in-an-ex-vivo-porcine-heart-model
#16
Gert Jan Pelgrim, Marco Das, Sjoerd van Tuijl, Marly van Assen, Frits W Prinzen, Marco Stijnen, Matthijs Oudkerk, Joachim E Wildberger, Rozemarijn Vliegenthart
To test the accuracy of quantification of myocardial perfusion imaging (MPI) using computed tomography (CT) in ex-vivo porcine models. Five isolated porcine hearts were perfused according to Langendorff. Hearts were perfused using retrograde flow through the aorta and blood flow, blood pressure and heart rate were monitored throughout the experiment. An inflatable cuff was placed around the circumflex (Cx) artery to create stenosis grades which were monitored using a pressure wire, analysing perfusion at several fractional flow reserve values of 1...
November 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28502060/comparison-of-univent-tube-and-ez-blocker-in-one-lung-ventilation-airway-pressures-and-gas-exchange
#17
Tülay Hoşten, Can Aksu, Alparslan Kuş, Sevim Cesur, Neşe Türkyılmaz, Mine Solak
Univent tube (UT) and EZ-blocker were used for one-lung ventilation (OLV). UT is a single lumen tube with a small separate lumen containing a bronchial blocker. EZ-blocker differs with its unique y-shaped double-cuffed distal end. We aimed to compare these two airway devices effects on airway pressures, oxygenation, ventilation and haemodynamics during OLV. Patients undergoing elective thoracotomy for the first time were included in this prospective randomized study. Patients were divided into two groups as UT and EZ...
May 13, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28459408/-influence-of-intermittently-monitoring-on-endotracheal-tube-cuff-pressure-using-handheld-pressure-gauge
#18
Ling Huang, Chen Xie, Lifeng Zhang, Liying Meng, Guizheng Li, Yang Li, Bing Huang, Linghui Pan, Zhanhong Tang
OBJECTIVE: To discuss the influence of intermittently monitoring on endotracheal tube cuff pressure using handheld pressure gauge, and to provide some reference for the clinical work. METHODS: The experiment was carried out on the model of the glass tube, which was divided into three parts. Each part of the experiment was divided into normal pressure group and high pressure group according to the different inflation pressure target value. The endotracheal tube cuff pressure was determined intermittently by using the transparent tracheal models which had a static diameter of 2 cm...
January 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28410880/the-effect-of-user-experience-and-inflation-technique-on-endotracheal-tube-cuff-pressure-using-a-feline-airway-simulator
#19
Donna M White, José I Redondo, Alastair R Mair, Fernando Martinez-Taboada
OBJECTIVE: The effect of user experience and inflation technique on endotracheal tube cuff pressure using a feline airway simulator. STUDY DESIGN: Prospective, experimental clinical study. METHODS: Participants included veterinary students at the beginning (group S1) and end (group S2) of their 2-week anaesthesia rotation and veterinary anaesthetists (group A). The feline airway simulator was designed to simulate an average size feline trachea, intubated with a 4...
February 24, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28397384/characteristics-and-effectiveness-of-vasodilatory-and-pressor-compensation-for-reduced-relaxation-time-during-rhythmic-forearm-contractions
#20
Robert F Bentley, Veronica J Poitras, Terrence Hong, Michael E Tschakovsky
During muscle contraction in rhythmic exercise muscle blood flow is significantly impeded by microvascular compression. The purpose of this study was to establish the nature and magnitude of vasodilatory and/or pressor compensatory responses during forearm exercise in the face of an increased duration of mechanical microvascular compression, and whether the effectiveness of such compensation was exercise intensity dependent. Seven healthy males (21.0 ± 1.8 yrs) completed progressive forearm exercise (24...
April 10, 2017: Experimental Physiology
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