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Hemodynamic monitoring

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https://www.readbyqxmd.com/read/28231305/effects-of-vasoactive-drugs-on-crystalloid-fluid-kinetics-in-septic-sheep
#1
Yuhong Li, Zheng Xiaozhu, Ru Guomei, Ding Qiannan, Robert G Hahn
PURPOSE: Crystalloid fluid and vasoactive drugs are used in the early treatment of sepsis. The purpose of the present study was to examine how these drugs alter plasma volume expansion, peripheral edema, and urinary excretion. METHODS: Twenty-five anesthetized sheep were made septic by cecal puncture and a short infusion of lipopolysaccharide. After 50 min, a slow infusion of isotonic saline was initiated: the saline either contained no drug, norepinephrine (1 μg/kg/min), phenylephrine (3 μg/kg/min), dopamine (50 μg/kg/min), or esmolol (50 μg/kg/min)...
2017: PloS One
https://www.readbyqxmd.com/read/28227950/designing-and-testing-a-wearable-wireless-fnirs-patch
#2
Mohammadreza Abtahi, Gozde Cay, Manob Jyoti Saikia, Kunal Mankodiya, Mohammadreza Abtahi, Gozde Cay, Manob Jyoti Saikia, Kunal Mankodiya, Manob Jyoti Saikia, Kunal Mankodiya, Gozde Cay, Mohammadreza Abtahi
Optical brain monitoring using near infrared (NIR) light has got a lot of attention in order to study the complexity of the brain due to several advantages as oppose to other methods such as EEG, fMRI and PET. There are a few commercially available functional NIR spectroscopy (fNIRS) brain monitoring systems, but they are still non-wearable and pose difficulties in scanning the brain while the participants are in motion. In this work, we present our endeavors to design and test a low-cost, wireless fNIRS patch using NIR light sources at wavelengths of 770 and 830nm, photodetectors and a microcontroller to trigger the light sources, read photodetector's output and transfer data wirelessly (via Bluetooth) to a smart-phone...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227618/non-invasive-cardiac-output-monitoring-in-pharmacology-a-plethysmographie-solution-in-rats
#3
Timothe Flenet, Julie Fontecave-Jallon, Stephane Tanguy, Francois Boucher, Pierre Baconnier, Pierre-Yves Gumery, Timothe Flenet, Julie Fontecave-Jallon, Stephane Tanguy, Francois Boucher, Pierre Baconnier, Pierre-Yves Gumery, Pierre-Yves Gumery, Pierre Baconnier, Stephane Tanguy, Julie Fontecave-Jallon, Francois Boucher, Timothe Flenet
Cardiovascular monitoring is of great importance in pharmacology but there is a lack of convenient non-invasive alternatives. Hence, we aim to evaluate the relevance of inductive plethysmography (IP) in preclinical cardiac studies. An IP system was specifically designed for rat. Its evaluation carried out using a mechanical test bench has shown appropriate instrumental performances for cardiac monitoring in rats. Measurements were also performed during a volume overload hemodynamic challenge in vivo in rats...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227447/non-invasive-monitoring-of-pulmonary-artery-pressure-at-the-bedside
#4
M Proenca, F Braun, E Muntane, J Sola, A Adler, M Lemay, J-Ph Thiran, S F Rimoldi, M Proenca, F Braun, E Muntane, J Sola, A Adler, M Lemay, J-Ph Thiran, S F Rimoldi, S F Rimoldi, E Muntane, J Sola, M Lemay, A Adler, J-Ph Thiran, F Braun
Current solutions for the monitoring of pulmonary artery pressure (PAP) in patients suffering from pulmonary hypertension are limited to invasive means. Non-invasive alternatives, such as Doppler echocardiography, are incompatible with continuous monitoring due to their dependency on qualified personnel to perform the measurements. In the present study, a novel non-invasive and unsupervised approach based on the use of electrical impedance tomography (EIT) is presented. The approach was evaluated in three healthy subjects undergoing hypoxia-induced variations in PAP...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227209/high-speed-in-vivo-imaging-of-retinal-hemodynamics-in-a-rodent-model-of-hypertension
#5
Mahdieh Rezaeian, Dana Georgevsky, S Mojtaba Golzan, Stuart L Graham, Mahdieh Rezaeian, Dana Georgevsky, S Mojtaba Golzan, Stuart L Graham, Dana Georgevsky, Mahdieh Rezaeian, S Mojtaba Golzan, Stuart L Graham
The eye is the only organ through which microcirculation can be visualized non-invasively. This unique feature makes the eye and specifically retinal vasculature an excellent target area to monitor and study micro-vascular damage in systemic diseases. Dynamic (real-time) changes of retinal vessels have been shown to be more specific to the disease in comparison with static measurements. In this study we utilize high speed imaging (i.e. 125 fps) to study and derive dynamic changes of retinal vessels in a rat model of hypertension...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227080/a-comparison-between-four-techniques-to-measure-cardiac-output
#6
A Pironet, P C Dauby, J G Chase, P Morimont, N Janssen, B Lambermont, S Davidson, T Desaive, A Pironet, P C Dauby, J G Chase, P Morimont, N Janssen, B Lambermont, S Davidson, T Desaive, T Desaive, B Lambermont, P C Dauby, N Janssen, P Morimont, A Pironet, J G Chase, S Davidson
Cardiac output is an important variable when monitoring hemodynamic status. In particular, changes in cardiac output represent the goal of several circulatory management therapies. Unfortunately, cardiac output is very difficult to estimate, either in experimental or clinical settings. The goal of this work is to compare four techniques to measure cardiac output: pressure-volume catheter, aortic flow probe, thermodilution, and the PiCCO monitor. These four techniques were simultaneously used during experiments of fluid and endotoxin administration on 7 pigs...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226988/analysis-and-experimental-simulation-of-blood-pressure-signal-distortions-observed-on-intensive-care-patients-monitored-by-a-catheter-in-radial-artery
#7
Lisa Guigue, Carole Lavault, Francis Grimbert, Yves Lavault, Norbert Noury, Francois R Boucher, Lisa Guigue, Carole Lavault, Francis Grimbert, Yves Lavault, Norbert Noury, Francois R Boucher, Francois R Boucher, Carole Lavault, Lisa Guigue, Yves Lavault, Francis Grimbert, Norbert Noury
The follow-up of patients with hemodynamic instability in intensive care units most often requires blood pressure measurement using a fluid-filled catheter in the radial artery and a fluid-filled tubing connected to a pressure transducer. However, in this usual setup major distortions frequently occur that may alter the pressure signal. Underdamping and overdamping have been well described whereas other types of distortions, including attenuations and varied envelopes of pulse pressure, have been less studied...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226574/a-temperature-controlled-glove-with-non-invasive-arterial-pulse-sensing-for-active-neuro-vascular-assessment
#8
Andrew M Carek, Omer T Inan, Andrew M Carek, Omer T Inan, Andrew M Carek, Omer T Inan
A non-invasive, active neuro-vascular assessment system was developed using a modified temperature-controlled glove and feedback techniques. The glove incorporates local heating and cooling of the hand using multi-point skin temperature measurements as feedback, and thereby induces local and central mechanisms involved in thermoregulation. Electrocardiogram (ECG), photoplethysmogram (PPG) and non-invasive finger-cuff based blood pressure (BP) measurements were used to monitor electrophysiology and hemodynamic changes in response to temperature modulation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226475/a-telemonitoring-platform-for-the-investigation-of-blood-pressure-profiles-in-pacemaker-patients
#9
G Calcagnini, E Mattei, R Quaglione, E De Ruvo, G Biancalana, G Pavone, A Gargaro, L Calo, F Ammirati, F Censi, G Calcagnini, E Mattei, R Quaglione, E De Ruvo, G Biancalana, G Pavone, A Gargaro, L Calo, F Ammirati, F Censi, A Gargaro, F Ammirati, R Quaglione, L Calo, G Pavone, F Censi, E Mattei, G Calcagnini, E De Ruvo, G Biancalana
Rate responsive pacemakers (PM) use different strategies to adapt the patient paced rate, with the aim of having the best hemodynamic performance in response to internal or external conditions. Closed-loop stimulation (CLS) uses intracardiac impedance as a sensor principle. The evaluation of impact of different pacing modalities and technologies on the blood pressure (BP) profiles is mainly investigated in short-term laboratory settings, mainly due to the need of reliable daily-based BP values. The impact of CLS pacing on systemic blood pressure (BP) has been studied on short term basis, but data on long term effects are scarse...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225604/a-microfluidic-device-for-studying-controllable-hydrodynamic-flow-induced-cellular-responses
#10
Chunhong Zheng, Xiannian Zhang, Chunmei Li, Yuhong Pang, Yanyi Huang
Hydrodynamic flow is an essential stimulus in many cellular functions, regulating many mechanical sensitive pathways and closely associating with human health status and diseases. The flow pattern of blood in vessels is the key factor in causing atherosclerosis. Hemodynamics has great effect on endothelial cells' gene expression and biological functions. There are various tools that can be used for studying flow-induced cellular responses but most of them are either bulky or lack of precise controllability...
February 22, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28224110/comparison-of-inhaled-milrinone-nitric-oxide-and-prostacyclin-in-acute-respiratory-distress-syndrome
#11
Martin Albert, Daniel Corsilli, David R Williamson, Marc Brosseau, Patrick Bellemare, Stéphane Delisle, Anne Qn Nguyen, France Varin
AIM: To evaluate the safety and efficacy of inhaled milrinone in acute respiratory distress syndrome (ARDS). METHODS: Open-label prospective cross-over pilot study where fifteen adult patients with hypoxemic failure meeting standard ARDS criteria and monitored with a pulmonary artery catheter were recruited in an academic 24-bed medico-surgical intensive care unit. Random sequential administration of iNO (20 ppm) or nebulized epoprostenol (10 μg/mL) was done in all patients...
February 4, 2017: World Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/28221168/hemodynamic-monitoring-during-liver-transplantation
#12
Giorgio Della Rocca, Paolo Chiarandini
No abstract text is available yet for this article.
February 17, 2017: International Anesthesiology Clinics
https://www.readbyqxmd.com/read/28220508/quantitative-long-term-measurements-of-burns-in-a-rat-model-using-spatial-frequency-domain-imaging-sfdi-and-laser-speckle-imaging-lsi
#13
Adrien Ponticorvo, David M Burmeister, Rebecca Rowland, Melissa Baldado, Gordon T Kennedy, Rolf Saager, Nicole Bernal, Bernard Choi, Anthony J Durkin
BACKGROUND AND OJECTIVES: The current standard for diagnosis of burn severity and subsequent wound healing is through clinical examination, which is highly subjective. Several new technologies are shifting focus to burn care in an attempt to help quantify not only burn depth but also the progress of healing. While accurate early assessment of partial thickness burns is critical for dictating the course of treatment, the ability to quantitatively monitor wound status over time is critical for understanding treatment efficacy...
February 21, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28219895/impact-of-practice-based-management-of-pa-pressures-in-2000-patients-implanted-with-the-cardiomems-sensor
#14
J Thomas Heywood, Rita Jermyn, David Shavelle, William T Abraham, Arvind Bhimaraj, Kunjan Bhatt, Fareed Sheikh, Eric Eichorn, Sumant Lamba, Rupinder Bharmi, Rahul Agarwal, Charisma Kumar, Lynne W Stevenson
Background -Elevated pulmonary artery (PA) pressures in patients with heart failure (HF) are associated with a high risk for hospitalization and mortality. Recent clinical trial evidence demonstrated a direct relationship between lowering remotely monitored PA pressures and HF hospitalization risk reduction using a novel implantable PA pressure monitoring system (CardioMEMS HF System, St Jude Medical). This study examines PA pressure changes in the first 2,000 US patients implanted in general practice use. Methods -De-identified data from the remote monitoring Merlin...
February 20, 2017: Circulation
https://www.readbyqxmd.com/read/28219329/ultrafiltration-rate-is-an-important-determinant-of-microcirculatory-alterations-during-chronic-renal-replacement-therapy
#15
Gerke Veenstra, Andrius Pranskunas, Inga Skarupskiene, Vidas Pilvinis, Marc H Hemmelder, Can Ince, E Christiaan Boerma
BACKGROUND: Hemodialysis (HD) with ultrafiltration (UF) in chronic renal replacement therapy is associated with hemodynamic instability, morbidity and mortality. Sublingual Sidestream Dark Field (SDF) imaging during HD revealed reductions in microcirculatory blood flow (MFI). This study aims to determine underlying mechanisms. METHODS: The study was performed in the Medical Centre Leeuwarden and the Lithuanian University of Health Sciences. Patients underwent 4-h HD session with linear UF...
February 20, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28219189/-effects-of-phentolamine-on-haemodynamics-of-patients-with-severe-sepsis
#16
W Yang, X B Li, Y Zhou, X M Mo
Objective: To explore the effects of phentolamine on hemodynamic of patients with severe sepsis . Methods: From January 2015 to August 2016, using random number table, 59 patients with severe sepsis were divided into research group and the control group by conventional treatment in Department of Emergency, the Second People's Hospital of Nanning City. The patients of the research group were given phentolamine injection. The CI, ITBVI, EVLWI, SVRI of the patients were monitored by PICCO on 6, 12, 24, 48, 72 h before and after treatment...
February 7, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28217052/topical-versus-caudal-ketamine-bupivacaine-combination-for-postoperative-analgesia-in-children-undergoing-inguinal-herniotomy
#17
Hala Saad Abdel-Ghaffar, Seham Mohamed Moeen, Ahmed Mohamed Moeen
BACKGROUND: Multiple studies claim that caudal administration of ketamine causes effective postoperative analgesia. The aim of this study was to assess the clinical effectiveness of ketamine after caudal or topical administration in pediatric patients undergoing inguinal herniotomy. PATIENTS AND METHODS: This randomized, comparative, double-blind study included eighty children (aged 6 months to 6 years) received either 1 ml/kg of 0.25% bupivacaine/ketamine 0.5 mg/kg for caudal analgesia (caudal group) or 0...
January 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/28217049/effectiveness-of-sodium-thiopentone-propofol-and-etomidate-as-an-ideal-intravenous-anesthetic-agent-for-modified-electroconvulsive-therapy
#18
Altaf Hussain Mir, Nida Farooq Shah, Mehraj Ud Din, Shabir Ahmad Langoo, Fayaz Ahmad Reshi
INTRODUCTION: Electroconvulsive therapy (ECT) is a well-established psychiatric treatment in which seizures are electrically induced in patients for therapeutic effects. ECT can produce severe disturbances in the cardiovascular system and a marked increase in cerebral blood flow and intracranial pressure. These cardiovascular changes may be altered using various anesthetic drugs. AIM AND OBJECTIVES: This study was undertaken to compare the effects of intravenous (IV) sodium thiopentone, propofol, and etomidate, used as IV anesthetic agents in modified ECT as regards, induction time and quality of anesthesia, alteration of hemodynamics, seizure duration, and recovery time...
January 2017: Saudi Journal of Anaesthesia
https://www.readbyqxmd.com/read/28215030/remote-monitoring-to-reduce-heart-failure-readmissions
#19
REVIEW
Sitaramesh Emani
PURPOSE OF REVIEW: Rehospitalization for heart failure remains a challenge in the treatment of affected patients. The ability to remotely monitor patients for worsening heart failure may provide an avenue through which therapeutic interventions can be made to prevent a rehospitalization. Available data on remote monitoring to reduce heart failure rehospitalizations are reviewed within. RECENT FINDINGS: Strategies to reduce readmissions include clinical telemonitoring, bioimpedance changes, biomarkers, and remote hemodynamic monitoring...
February 18, 2017: Current Heart Failure Reports
https://www.readbyqxmd.com/read/28213945/optimization-of-initial-propofol-bolus-dose-for-eeg-narcotrend-index-guided-transition-from-sevoflurane-induction-to-intravenous-anesthesia-in-children
#20
Nils Dennhardt, Dietmar Boethig, Christiane Beck, Sebastian Heiderich, Martin Boehne, Andreas Leffler, Barbara Schultz, Robert Sümpelmann
BACKGROUND: Sevoflurane induction followed by intravenous anesthesia is a widely used technique to combine the benefits of an easier and less traumatic venipuncture after sevoflurane inhalation with a recovery with less agitation, nausea, and vomiting after total intravenous anesthesia (TIVA). Combination of two different anesthetics may lead to unwanted burst suppression in the electroencephalogram (EEG) during the transition phase. OBJECTIVE: The objective of this prospective clinical observational study was to identify the optimal initial propofol bolus dose for a smooth transition from sevoflurane induction to TIVA using the EEG Narcotrend Index (NI)...
February 18, 2017: Paediatric Anaesthesia
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