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non invasive hemodynamic monitoring

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https://www.readbyqxmd.com/read/29409786/cine-mri-during-spontaneous-cramps-in-women-with-menstrual-pain
#1
Kevin M Hellman, Caroline S Kuhn, Frank F Tu, Katlyn E Dillane, Nathan A Shlobin, Sangeeta Senapati, Xiaojie Zhou, Wei Li, Pottumarthi V Prasad
BACKGROUND: The lack of non-invasive methods to study dysmenorrhea has resulted in poor understanding of the mechanisms underlying pain, insufficient diagnostic tests, and limited treatment options. To address this knowledge gap, we have developed an MRI-based strategy for continuously monitoring the uterus in relation to participants' spontaneous pain perception. OBJECTIVE: The study objective was to evaluate whether MRI can detect real-time changes in myometrial activity during cramping episodes in women with dysmenorrhea, with a hand-held squeeze bulb for pain reporting...
January 31, 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29382114/utility-of-non-invasive-monitoring-of-cardiac-output-and-cerebral-oximetry-during-pain-management-of-children-with-sickle-cell-disease-in-the-pediatric-emergency-department
#2
Pradeep Padmanabhan, Chikelue Oragwu, Bibhuti Das, John A Myers, Ashok Raj
Pain crisis in children with sickle cell disease (SCD) is typically managed with intravenous fluids and parenteral opioids in the pediatric emergency department. Electrical cardiometry (EC) can be utilized to measure cardiac output (CO) and cardiac index (CI) non-invasively. Near-infrared spectroscopy (NIRS) measuring cerebral (rCO₂) and splanchnic regional (rSO₂) mixed venous oxygenation non-invasively has been utilized for monitoring children with SCD. We studied the value and correlation of NIRS and EC in monitoring hemodynamic status in children with SCD during pain crisis...
January 29, 2018: Children
https://www.readbyqxmd.com/read/29380189/respiratory-changes-in-subclavian-vein-diameters-predicts-fluid-responsiveness-in-intensive-care-patients-a-pilot-study
#3
Raphaël Giraud, Paul S Abraham, Pauline Brindel, Nils Siegenthaler, Karim Bendjelid
The present pilot study investigated whether respiratory variation in subclavian vein (SCV) diameters correlates with fluid responsiveness in mechanically ventilated patients. Monocentric, prospective clinical study on fluid responsiveness in adult sedated, mechanically ventilated ICU patient, monitored with the PiCCO™ system (Pulsion Medical System, Germany), and requiring a fluid challenge (FC). A 10-min fluid bolus of 500 mL of 0.9% saline was administered. Cardiac output (CO) and dynamic parameters [stroke volume variation (SVV) and pulse pressure variation (PPV)] measured by transpulmonary thermodilution and pulse contour analysis (PiCCO™) as well as classical hemodynamic parameters were recorded at baseline and after FC...
January 29, 2018: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29368903/-anesthesic-management-during-total-organic-separation-of-pygopagus-conjoined-twins
#4
Mayra Lizeth Nava-Martínez, Enriqueta Macias-Miranda, Karla Guadalupe Lozada-Rosete, Juan José Dosta-Herrera
BACKGROUND: Conjoined twins are among the most rare and challenging congenital malformations. The incidence varies from 1:30 000 to 1:200 000 live births. Pygopagus twins account for about 10 to 18% of all conjoined twins. CLINICAL CASE: We report the case of male conjoined pygopagus twins. They shared medullary canal, anal canal and sacrococcygeal region, without any degree of cross circulation. At the moment of the surgery, twin 1 had congenital heart disease without medical treatment...
January 2018: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/29342097/time-domain-near-infrared-spectroscopy-device-for-monitoring-muscle-oxidative-metabolism-custom-probe-and-in-vivo-applications
#5
Rebecca Re, Ileana Pirovano, Davide Contini, Lorenzo Spinelli, Alessandro Torricelli
Measurement of muscle oxidative metabolism is of interest for monitoring the training status in athletes and the rehabilitation process in patients. Time domain near infrared spectroscopy (TD NIRS) is an optical technique that allows the non-invasive measurement of the hemodynamic parameters in muscular tissue: concentrations of oxy- and deoxy-hemoglobin, total hemoglobin content, and tissue oxygen saturation. In this paper, we present a novel TD NIRS medical device for muscle oxidative metabolism. A custom-printed 3D probe, able to host optical elements for signal acquisition from muscle, was develop for TD NIRS in vivo measurements...
January 17, 2018: Sensors
https://www.readbyqxmd.com/read/29311754/correlation-between-cerebral-hemodynamic-and-perfusion-pressure-changes-in-non-human-primates
#6
A Ruesch, M A Smith, G Wollstein, I A Sigal, S Nelson, J M Kainerstorfer
The mechanism that maintains a stable blood flow in the brain despite changes in cerebral perfusion pressure (CPP), and therefore guaranties a constant supply of oxygen and nutrients to the neurons, is known as cerebral autoregulation (CA). In a certain range of CPP, blood flow is mediated by a vasomotor adjustment in vascular resistance through dilation of blood vessels. CA is known to be impaired in diseases like traumatic brain injury, Parkinson's disease, stroke, hydrocephalus and others. If CA is impaired, blood flow and pressure changes are coupled and the oxygen supply might be unstable...
February 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/29287672/-impact-of-hypotension-and-global-hypoperfusion-in-postoperative-delirium-a-pilot-study-in-older-adults-undergoing-open-colon-surgery
#7
Eduardo Tobar, Mario A Abedrapo, Jaime A Godoy, Jose L Llanos, Mauricio J Díaz, Rodrigo Azolas, Gunther R Bocic, Jaime A Escobar, Rodrigo A Cornejo, Carlos M Romero
BACKGROUND: Post-operative delirium is a serious complication in patients undergoing major abdominal surgery. It remains unclear whether peri-operative hemodynamic and perfusion variables affect the risk for postoperative delirium. The objective of this pilot study was to evaluate the association between perfusion and hemodynamics peri-operative with the appearance of post-operative delirium. METHODS: Prospective cohort study of adults 60 years or older undergoing elective open colon surgery...
December 26, 2017: Revista Brasileira de Anestesiologia
https://www.readbyqxmd.com/read/29284341/cerebral-perfusion-monitoring-in-adult-patients-following-cardiac-surgery-an-observational-study
#8
Tammy Slater, Julie Stanik-Hutt, Patricia Davidson
BACKGROUND: Strokes following adult cardiac surgery contribute to burdensome neurocognitive complications, which are often difficult to detect during the perioperative period. Fluctuations in regional cerebral perfusion and co-morbid conditions, such as hypertension, diabetes, prior stroke, symptomatic carotid stenosis, aortic atherosclerotic disease, and peripheral vascular disease are associated with perioperative strokes. Approaches to achieve optimal cerebral perfusion remain elusive and traditional strategies for perioperative monitoring are not always sufficiently sensitive to detect acute changes in cerebral perfusion...
December 28, 2017: Contemporary Nurse
https://www.readbyqxmd.com/read/29276149/real-time-and-non-invasive-monitoring-of-the-activation-of-the-ire1%C3%AE-xbp1-pathway-in-individuals-with-hemodynamic-impairment
#9
Baptiste Fohlen, Quentin Tavernier, Thi-Mum Huynh, Cédric Caradeuc, Delphine Le Corre, Gildas Bertho, Bernard Cholley, Nicolas Pallet
Many stressors that are encountered upon kidney injury are likely to trigger endoplasmic reticulum (ER) stress, subsequently activating transcriptional, translational and metabolic reprogramming. Monitoring early cellular adaptive responses engaged after hemodynamic impairment yields may represent a clinically relevant approach. However, a non-invasive method for detecting the ER stress response has not been developed. We combined a metabolomic approach with genetic marker analyses using urine from individuals undergoing scheduled cardiac surgery under cardiopulmonary bypass to investigate the feasibility and significance of monitoring the ER stress response in the kidney...
December 20, 2017: EBioMedicine
https://www.readbyqxmd.com/read/29230392/non-invasive-monitoring-of-cardiac-output-in-critical-care-medicine
#10
REVIEW
Lee S Nguyen, Pierre Squara
Critically ill patients require close hemodynamic monitoring to titrate treatment on a regular basis. It allows administering fluid with parsimony and adjusting inotropes and vasoactive drugs when necessary. Although invasive monitoring is considered as the reference method, non-invasive monitoring presents the obvious advantage of being associated with fewer complications, at the expanse of accuracy, precision, and step-response change. A great many methods and devices are now used over the world, and this article focuses on several of them, providing with a brief review of related underlying physical principles and validation articles analysis...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/29222766/electrical-velocimetry-for-non-invasive-monitoring-of-the-closure-of-the-ductus-arteriosus-in-preterm-infants
#11
Ana Rodríguez Sánchez de la Blanca, M Sánchez Luna, N González Pacheco, M Arriaga Redondo, N Navarro Patiño
Closure of a patent ductus arteriosus (PDA) in preterm infants modifies cardiac output and induces adaptive changes in the hemodynamic situation. The present study aims to analyze those changes, through a non-invasive cardiac output monitor based on blood electrical velocimetry, in preterm babies. A prospective observational study of preterm infants with a gestational age of less than 28 weeks, and a hemodynamic significant PDA, requires intravenous ibuprofen or surgical closure. All patients were monitored with electrical velocimetry before treatment and through the following 72 h...
February 2018: European Journal of Pediatrics
https://www.readbyqxmd.com/read/29218310/non-invasive-hemodynamic-monitoring-for-hemodynamic-management-in-perioperative-medicine
#12
Julia Y Nicklas, Bernd Saugel
No abstract text is available yet for this article.
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/29102503/maternal-hemodynamics-a-method-to-classify-hypertensive-disorders-of-pregnancy
#13
Enrico Ferrazzi, Tamara Stampalija, Lorenzo Monasta, Daniela Di Martino, Sharona Vonck, Wilfried Gyselaers
BACKGROUND: The classification of hypertensive disorders of pregnancy is based on the time at the onset of hypertension, proteinuria, and other associated complications. Maternal hemodynamic interrogation in hypertensive disorders of pregnancy considers not only the peripheral blood pressure but also the entire cardiovascular system, and it might help to classify the different clinical phenotypes of this syndrome. OBJECTIVE: This study aimed to examine cardiovascular parameters in a cohort of patients affected by hypertensive disorders of pregnancy according to the clinical phenotypes that prioritize fetoplacental characteristics and not the time at onset of hypertensive disorders of pregnancy...
November 2, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29099725/limitations-and-challenges-of-eit-based-monitoring-of-stroke-volume-and-pulmonary-artery-pressure
#14
Fabian Braun, Martin Proença, Mathieu Lemay, Mattia Bertschi, Andy Adler, Jean-Philippe Thiran, Josep Sola
<i>Objective</i>: Electrical impedance tomography (EIT) shows potential for radiation-free and non-invasive hemodynamic monitoring. However, many factors degrade the accuracy and repeatability of these measurements. Our goal is to estimate the impact of this variability on EIT-based monitoring of two important central hemodynamic parameters: stroke volume (SV) and pulmonary artery pressure (PAP). <i>Approach</i>: We performed simulations on a 4D (3D + t) bioimpedance model of a human volunteer to study the influence of four potential confounding factors (electrode belt displacement, electrode detachment, changes in hematocrit and lung air volume) on the performance of EIT-based SV and PAP estimation...
November 3, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/29075895/cerebral-ischaemia-following-anterior-upper-thoracic-spinal-surgery-utilizing-a-partial-manubrial-resection
#15
David Christopher Kieser, Derek Thomas Cawley, Takashi Fujishiro, Cecile Roscop, Louis Boissiere, Ibrahim Obeid, Olivier Gille, Jean-Marc Vital, Vincent Pointillart
PURPOSE: Firstly, to describe two cases of cerebral ischaemia complicating anterior upper thoracic spinal surgery and define the likely cause of this complication. Secondly, to describe preventative measures and the effect these have had in reducing this complication within our institution. METHODS: Firstly, a review of two cases of cerebral ischaemia complicating anterior upper thoracic spinal surgery utilizing a partial manubrial resection. Secondly, cadaveric dissections of the carotid arteries to determine the effect of neck positioning and aortic arch retraction during a simulated procedure...
October 26, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29059883/monitoring-of-cardiac-output-and-lung-ventilation-by-electrical-impedance-tomography-in-a-porcine-model-of-acute-lung-injury
#16
Nadine Hochhausen, Henriette Dohmeier, Rolf Rossaint, Michael Czaplik
Adequate medical treatment of the Acute Respiratory Distress Syndrome is still challenging since patient-individual aspects have to be taken into account. Lung protective ventilation and hemodynamic stability have always been two of the most crucial aims of intensive care therapy. For both aspects, a continuous - preferably non-invasive - monitoring is desirable that is available at the bedside. Unfortunately, there is no technique clinically established yet, that provides both measurement of cardiac stroke volume and ventilation dynamics in real-time...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29034783/cerebral-and-limb-tissue-oxygenation-during-peripheral-venoarterial-extracorporeal-life-support
#17
Nousjka P A Vranken, Anouk A M A Lindelauf, Antoine P Simons, Marcel J H Ariës, Jos G Maessen, Patrick W Weerwind
Femoral access in extracorporeal life support (ECLS) has been associated with regional variations in arterial oxygen saturation, potentially predisposing the patient to ischemic tissue damage. Current monitoring techniques, however, are limited to intermittent bedside evaluation of capillary refill among other factors. The aim of this study was to assess whether cerebral and limb regional tissue oxygen saturation (rSO2) values reflect changes in various patient-related parameters during venoarterial ECLS (VA-ECLS)...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/29030623/monitoring-cerebral-hemodynamic-change-during-transcranial-ultrasound-stimulation-using-optical-intrinsic-signal-imaging
#18
Evgenii Kim, Eloise Anguluan, Jae Gwan Kim
Transcranial ultrasound stimulation (tUS) is a promising non-invasive approach to modulate brain circuits. The application is gaining popularity, however the full effect of ultrasound stimulation is still unclear and further investigation is needed. This study aims to apply optical intrinsic signal imaging (OISI) for the first time, to simultaneously monitor the wide-field cerebral hemodynamic change during tUS on awake animal with high spatial and temporal resolution. Three stimulation paradigms were delivered using a single-element focused transducer operating at 425 kHz in pulsed mode having the same intensity (ISPPA = 1...
October 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29027094/multimodal-functional-neuroimaging-by-simultaneous-bold-fmri-and-fiber-optic-calcium-recordings-and-optogenetic-control
#19
REVIEW
Franziska Albers, Lydia Wachsmuth, Timo Mauritz van Alst, Cornelius Faber
Recent developments of optogenetic tools and fluorescence-based calcium recording techniques enable the manipulation and monitoring of neural circuits on a cellular level. Non-invasive imaging of brain networks, however, requires the application of methods such as blood oxygen level-dependent (BOLD) functional magnetic resonance imaging (fMRI), which is commonly used for functional neuroimaging. While BOLD fMRI provides brain-wide non-invasive reading of the hemodynamic response, it is only an indirect measure of neural activity...
October 12, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/29026684/combined-multi-distance-frequency-domain-and-diffuse-correlation-spectroscopy-system-with-simultaneous-data-acquisition-and-real-time-analysis
#20
Stefan A Carp, Parisa Farzam, Norin Redes, Dennis M Hueber, Maria Angela Franceschini
Frequency domain near infrared spectroscopy (FD-NIRS) and diffuse correlation spectroscopy (DCS) have emerged as synergistic techniques for the non-invasive assessment of tissue health. Combining FD-NIRS oximetry with DCS measures of blood flow, the tissue oxygen metabolic rate can be quantified, a parameter more closely linked to underlying physiology and pathology than either NIRS or DCS estimates alone. Here we describe the first commercially available integrated instrument, called the "MetaOx", designed to enable simultaneous FD-NIRS and DCS measurements at rates of 10 + Hz, and offering real-time data evaluation...
September 1, 2017: Biomedical Optics Express
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