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non invasive hemodynamic monitoring

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https://www.readbyqxmd.com/read/28327093/continuous-non-invasive-finger-cuff-caretaker%C3%A2-comparable-to-invasive-intra-arterial-pressure-in-patients-undergoing-major-intra-abdominal-surgery
#1
Irwin Gratz, Edward Deal, Francis Spitz, Martin Baruch, I Elaine Allen, Julia E Seaman, Erin Pukenas, Smith Jean
BACKGROUND: Despite increased interest in non-invasive arterial pressure monitoring, the majority of commercially available technologies have failed to satisfy the limits established for the validation of automatic arterial pressure monitoring by the Association for the Advancement of Medical Instrumentation (AAMI). According to the ANSI/AAMI/ISO 81060-2:2013 standards, the group-average accuracy and precision are defined as acceptable if bias is not greater than 5 mmHg and standard deviation is not greater than 8 mmHg...
March 21, 2017: BMC Anesthesiology
https://www.readbyqxmd.com/read/28317398/cardiac-transplantation-towards-a-new-noninvasive-approach-of-cardiac-allograft-rejection
#2
Sophie I Mavrogeni, George Athanasopoulos, Aggeliki Gouziouta, Evangelos Leontiadis, Stamatis Adamopoulos, Genovefa Kolovou
Cardiac allograft rejection (CAR) may occur after transplantation and remains silent, until hemodynamic deterioration takes place. Endomyocardial biopsy (EMB) is applied to early detect CAR. Although, flexible bioptoms have decreased the incidence of lethal complications, EMB remains an invasive procedure carrying risk of tamponade and permanent heart block. Therefore, a new non-invasive approach is needed. Areas covered: AlloMap molecular expression testing and graft-derived cell-free DNA (GcfDNA) test can be used as blood indices of acute and chronic CAR, respectively...
March 21, 2017: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/28294444/effect-of-change-in-posture-on-maternal-functional-hemodynamics-at-35-37-weeks-gestation
#3
Gavin P Guy, Hua Z Ling, Mirian Machuca, Liona C Poon, Kypros H Nicolaides
OBJECTIVE: To evaluate the effect of posture change from the supine to sitting position and before and after passive leg raising on maternal functional hemodynamics in pregnant women at 35-37 weeks' gestation and to compare the changes in pregnancies that subsequently developed preeclampsia (PE) and gestational hypertension (GH) to those who remained normotensive. METHODS: In 3,013 singleton pregnancies at 35-37 weeks' gestation maternal cardiovascular parameters were measured using an automated non-invasive cardiac monitor...
March 13, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28276534/non-invasive-assessment-of-cerebral-blood-flow-and-oxygen-metabolism-in-neonates-during-hypothermic-cardiopulmonary-bypass-feasibility-and-clinical-implications
#4
Silvina L Ferradal, Koichi Yuki, Rutvi Vyas, Christopher G Ha, Francesca Yi, Christian Stopp, David Wypij, Henry H Cheng, Jane W Newburger, Aditya K Kaza, Maria A Franceschini, Barry D Kussman, P Ellen Grant
The neonatal brain is extremely vulnerable to injury during periods of hypoxia and/or ischemia. Risk of brain injury is increased during neonatal cardiac surgery, where pre-existing hemodynamic instability and metabolic abnormalities are combined with long periods of low cerebral blood flow and/or circulatory arrest. Our understanding of events associated with cerebral hypoxia-ischemia during cardiopulmonary bypass (CPB) remains limited, largely due to inadequate tools to quantify cerebral oxygen delivery and consumption non-invasively and in real-time...
March 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28269375/non-invasive-cardiac-output-monitoring-in-pharmacology-a-plethysmographie-solution-in-rats
#5
Timothe Flenet, Julie Fontecave-Jallon, Stephane Tanguy, Francois Boucher, Pierre Baconnier, Pierre-Yves Gumery
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/28269217/non-invasive-monitoring-of-pulmonary-artery-pressure-at-the-bedside
#6
M Proenca, F Braun, E Muntane, J Sola, A Adler, M Lemay, J-Ph Thiran, S F Rimoldi
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/28268999/high-speed-in-vivo-imaging-of-retinal-hemodynamics-in-a-rodent-model-of-hypertension
#7
Mahdieh Rezaeian, Dana Georgevsky, 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/28268404/a-temperature-controlled-glove-with-non-invasive-arterial-pulse-sensing-for-active-neuro-vascular-assessment
#8
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/28241562/lookup-table-based-inverse-model-for-mapping-oxygen-concentration-of-cutaneous-microvessels-using-hyperspectral-imaging
#9
Wei Feng, Rui Shi, Chao Zhang, Tingting Yu, Dan Zhu
Hyperspectral imaging combining with skin optical clearing technique provides a possible way to non-invasively monitor hemodynamics of cutaneous microvessels. In order to estimate microvascular blood oxygen saturation, in this work, a lookup-table-based inverse model was developed to extract the microvascular optical and physiological properties using hyperspectral analysis. This approach showed a higher fitting degree than currently existing hyperspectral analysis methods (i.e. multiple linear regression and non-negative least square fit) in estimating blood oxygen saturation...
February 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28238244/nt-probnp-as-a-potential-marker-of-left-atrial-dysfunction-in-rheumatic-mitral-stenosis-correlation-with-left-atrial-function-after-pbmv
#10
Rashi Khare, Sudhanshu Dwivedi
BACKGROUND: Rheumatic heart disease is a common reason for cardiovascular morbidity and mortality. Plasma levels of N-terminal pro-brain natriuretic peptide (NT-proBNP) are known to rise in patients with MS, but the role of this compound as a non-invasive marker of left atrial (LA) dysfunction is yet to be established. The study aim was to correlate levels of NT-proBNP in patients with rheumatic mitral stenosis (MS), with echocardiographic parameters of LA function including tissue Doppler-derived strain/strain rate (S/Sr) indices, hemodynamic parameters of LA function, before and after percutaneous balloon mitral valvotomy (PBMV) for a follow up of one year...
September 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/28227618/non-invasive-cardiac-output-monitoring-in-pharmacology-a-plethysmographie-solution-in-rats
#11
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
#12
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
#13
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/28226574/a-temperature-controlled-glove-with-non-invasive-arterial-pulse-sensing-for-active-neuro-vascular-assessment
#14
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/28220508/quantitative-long-term-measurements-of-burns-in-a-rat-model-using-spatial-frequency-domain-imaging-sfdi-and-laser-speckle-imaging-lsi
#15
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/28210936/does-obesity-affect-the-non-invasive-measurement-of-cardiac-output-performed-by-electrical-cardiometry-in-children-and-adolescents
#16
Luis Altamirano-Diaz, Eva Welisch, Ralf Rauch, Michael Miller, Teresa Sohee Park, Kambiz Norozi
Electrical cardiometry (EC) is a non-invasive and inexpensive method for hemodynamic assessment and monitoring. However, its feasibility for widespread clinical use, especially for the obese population, has yet to be determined. In this study, we evaluated the agreement and reliability of EC compared to transthoracic Doppler echocardiography (TTE) in normal, overweight, and obese children and adolescents. We measured stroke volume (SV) and cardiac output (CO) of 131 participants using EC and TTE simultaneously...
February 17, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28187374/the-strengths-and-weaknesses-of-non-invasive-parameters-obtained-by-echocardiography-and-cardiopulmonary-exercise-testing-in-comparison-with-the-hemodynamic-assessment-by-the-right-heart-catheterization-in-patients-with-pulmonary-hypertension
#17
Katarzyna Ptaszyńska-Kopczyńska, Anna Krentowska, Emilia Sawicka, Anna Skoneczny, Małgorzata Jasiewicz, Małgorzata Knapp, Włodzimierz J Musiał, Bożena Sobkowicz, Karol A Kamiński
PURPOSE: Pulmonary hypertension (PH) diagnosis requires invasive assessment by right heart catheterization (RHC), but screening and monitoring are performed using non-invasive methods: echocardiography and cardiopulmonary exercise testing (CPET). The aim of the study was to assess correlations between the parameters obtained in non-invasive testing and RHC in patients with PH of different etiologies. MATERIAL/METHODS: The study included 53 medical records of PH patients (32 women) aged 29-81 years...
June 14, 2016: Advances in Medical Sciences
https://www.readbyqxmd.com/read/28183565/minimum-effective-fluid-volume-of-colloid-to-prevent-hypotension-during-caesarean-section-under-spinal-anesthesia-using-a-prophylactic-phenylephrine-infusion-an-up-down-sequential-allocation-study
#18
Christian Loubert, Pierre-Olivier Gagnon, Roshan Fernando
STUDY OBJECTIVE: The aim of this study was to de termine the minimum effective fluid volume (MEFV) of hydroxyethyl starch 130/0.4 (HES) infused in a preload fashion which would prevent hypotension in 50% of parturients undergoing caesarean section. A secondary objective was to measure the hemodynamic effect of fluid loading on the subjects. DESIGN: This is a prospective, double-blinded, dose-finding study using an up-down sequential allocation design. SETTING: In the operating room...
February 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28155695/association-of-simultaneously-measured-four-limb-blood-pressures-with-cardiovascular-function-a-cross-sectional-study
#19
Xiaorui Song, Gaoyang Li, Aike Qiao, Zhihui Chen
BACKGROUND: Simultaneous measurement of four-limb blood pressures can improve the accuracy of cardiovascular disease diagnosis. This study aims to investigate the association of simultaneously measured four-limb blood pressures with cardiovascular function as the non-invasive diagnostic method of cardiovascular disease in primary care. METHODS: 229 subjects (62 males, mean age, 63.50 ± 11.13 years; 167 females, mean age, 59.47 ± 7.33 years) were enrolled...
December 28, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28146577/blood-microbiome-quantity-and-the-hyperdynamic-circulation-in-decompensated-cirrhotic-patients
#20
Daniela Traykova, Beacher Schneider, Mario Chojkier, Martina Buck
BACKGROUND: Recently, a complex microbiome was comprehensibly characterized in the serum and ascitic fluid of cirrhotic patients. In the current study, we investigated for the first time the induction of inflammatory pathways and Nitric Oxide, as well as the systemic hemodynamics in conjunction with the blood microbiome in a Child-Pugh class B cirrhotic cohort. METHODS AND FINDINGS: We used the Intestinal Infections Microbial DNA qPCR Array to screen for 53 bacterial DNA from the gut in the blood...
2017: PloS One
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