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noninvasive hemodynamic monitoring

Cole S Bailey, Luke T Wooster, Mary Buswell, Sarvagna Patel, Paul P Pappagianopoulos, Kristian Bakken, Casey White, Melissa Tanguay, Jasmine B Blodgett, Aaron L Baggish, Rajeev Malhotra, Gregory D Lewis
OBJECTIVES: This study sought to characterize the functional and prognostic significance of oxygen uptake (VO2 ) kinetics following peak exercise in individuals with heart failure (HF). BACKGROUND: It is unknown to what extent patterns of VO2 recovery following exercise reflect circulatory response during exercise in HF with preserved ejection fraction (HFpEF) and HF with reduced ejection fraction (HFrEF). METHODS: We investigated patients (30 HFpEF, 20 HFrEF, and 22 control subjects) who underwent cardiopulmonary exercise testing with invasive hemodynamic monitoring and a second distinct HF cohort (n = 106) who underwent noninvasive cardiopulmonary exercise testing with assessment of long-term outcomes...
March 1, 2018: JACC. Heart Failure
L J Delaney, R Bellomo, F van Haren
To describe the baseline hemodynamic variables and response time of hemodynamic changes associated with the Valsalva maneuver using noninvasive continuous cardiac output monitoring (Nexfin). Hemodynamic monitoring provides an integral component of advanced clinical care and the ability to monitor response to treatment interventions. The emergence of noninvasive hemodynamic monitoring provides clinicians with an opportunity to monitor and assess patients rapidly with ease of implementation. However, the responsiveness of this method in tracking dynamic changes that occur has not been fully elucidated...
March 1, 2018: Clinical Nursing Research
Annika S Lindroos, Ville L Langén, Ilkka Kantola, Veikko Salomaa, Eeva P Juhanoja, Sam S Sivén, Pekka Jousilahti, Antti M Jula, Teemu J Niiranen
OBJECTIVE: The present cross-sectional study investigated whether central SBP and pulse pressure (PP) measured noninvasively with a novel cuff-based stand-alone monitor are more strongly associated with hypertensive end-organ damage than corresponding brachial measures. METHODS: We investigated the cross-sectional association of central versus brachial SBP and PP with echocardiographic left ventricular mass index (LVMI), LV hypertrophy (LVH), carotid intima-media thickness (IMT), and increased IMT (IMT ≥ 75th percentile) among 246 participants drawn from the general population (mean age 57...
February 20, 2018: Journal of Hypertension
Emily Welker, Jennifer Novak, Lindsey Jelsma, Tracy Koehler, Alan Davis, James DeCou, Emily Durkin
BACKGROUND/PURPOSE: Hemoglobin monitoring is required in pediatric trauma patients with solid organ injury. We hypothesized that noninvasive hemodynamic monitoring (NIHM) represents an effective, safe alternative to laboratory hemoglobin (LabHb) monitoring in clinically stable patients. METHODS: A retrospective cohort study was conducted regarding pediatric trauma patients (<18 years old) with blunt solid organ injury over six consecutive months. Continuous NIHM was initiated at the time of admission, and LabHb measurements were obtained per institutional guidelines...
December 27, 2017: Journal of Pediatric Surgery
Felix Neunhoeffer, Michael Hofbeck, Martin Ulrich Schuhmann, Jörg Fuchs, Christian Schlensak, Martin Esslinger, Ines Gerbig, Vanya Icheva, Ellen Heimberg, Matthias Kumpf, Jörg Michel
OBJECTIVE: Although infants following major surgery frequently require RBC transfusions, there is still controversy concerning the best definition for requirement of transfusion in the individual patient. The aim of this study was to determine the impact of RBC transfusion on cerebral oxygen metabolism in noncardiac and cardiac postsurgical infants. DESIGN: Prospective observational cohort study. SETTING: Pediatric critical care unit of a tertiary referral center...
February 5, 2018: Pediatric Critical Care Medicine
Özcan Pişkin, İbrahim İlker Öz
In the intensive care unit (ICU), stable hemodynamics are very important. Hemodynamic intervention is often effective against multiple organ failure, such as in tissue hypoxia and shock. The administration of intravenous fluids is the first step in regulating tissue perfusion.The main objective of this study is to compare the performance between 2 methods namely pleth variability index (PVI) and IVC distensibily index (dIVC).In this study, the hemodynamic measurements were performed before and after passive leg raising (PLR)...
November 2017: Medicine (Baltimore)
Ke Zhao, Yaoyao Ji, Yan Li, Ting Li
Near-infrared spectroscopy (NIRS) has become widely accepted as a valuable tool for noninvasively monitoring hemodynamics for clinical and diagnostic purposes. Baseline shift has attracted great attention in the field, but there has been little quantitative study on baseline removal. Here, we aimed to study the baseline characteristics of an in-house-built portable medical NIRS device over a long time (>3.5 h). We found that the measured baselines all formed perfect polynomial functions on phantom tests mimicking human bodies, which were identified by recent NIRS studies...
January 21, 2018: Sensors
Valeria Cammalleri, Francesco Romeo, Massimo Marchei, Andrea Anceschi, Gianluca Massaro, Saverio Muscoli, Francesca De Persis, Massimiliano Macrini, Gian P Ussia
PURPOSE: The aim of our study was to assess the arterial cerebral blood flow variations in patients with aortic valve stenosis, immediately after the transcatheter aortic valve implantation (TAVI). METHODS: The study population includes 62 consecutive patients who underwent TAVI for aortic valve stenosis (95%) and sugical bioprosthesis degeneration (5%). Carotid Doppler examination was performed recording blood flow, systolic peak velocity, time average mean velocity and mean acceleration time at baseline, after balloon aortic valvuloplasty, and within 10 min after the device release...
January 17, 2018: Journal of Cardiovascular Medicine
K H Wodack, S Buehler, S A Nishimoto, M F Graessler, C R Behem, A D Waldmann, B Mueller, S H Böhm, E Kaniusas, F Thürk, A Maerz, C J C Trepte, D A Reuter
OBJECTIVE: Electrical impedance tomography (EIT) is a non-invasive and radiation-free bedside monitoring technology, primarily used to monitor lung function. First experimental data shows that the descending aorta can be detected at different thoracic heights and might allow the assessment of central hemodynamics, i.e. stroke volume and pulse transit time. APPROACH: First, the feasibility of localizing small non-conductive objects within a saline phantom model was evaluated...
February 28, 2018: Physiological Measurement
Viviane G Nasr, Lisa T Bergersen, Hung-Mo Lin, Paul B Benni, Rachel S Bernier, Michelle E Anderson, Barry D Kussman
BACKGROUND: Cerebral oximetry using near-infrared spectroscopy is a noninvasive optical technology to detect cerebral hypoxia-ischemia and develop interventions to prevent and ameliorate hypoxic brain injury. Cerebral oximeters are calibrated and validated by comparison of the near-infrared spectroscopy-measured cerebral O2 saturation (SctO2) to a "field" or reference O2 saturation (REF CX) calculated as a weighted average from arterial and jugular bulb oxygen saturations. In this study, we calibrated and validated the second-generation, 5 wavelength, FORE-SIGHT Elite with the medium sensor (source-detector separation 12 and 40 mm) for measurement of SctO2 in children with congenital heart disease...
January 9, 2018: Anesthesia and Analgesia
Sandra Herrera, Maggie J Kuhlmann-Capek, Sarah C Rogan, Antonio F Saad, George R Saade, Gary D V Hankins, Luis D Pacheco
OBJECTIVE:  It is unknown whether the heart operates in the ascending or flat portion of the Starling curve during normal pregnancy. Pregnant women do not respond to the passive leg-raising maneuver secondary to mechanical obstruction of the inferior vena cava by the gravid uterus. Our objective was to evaluate if administration of a fluid bolus increases baseline stroke volume (SV) among healthy pregnant patients during the third trimester. STUDY DESIGN:  Healthy pregnant women who underwent elective term cesarean sections were included...
December 26, 2017: American Journal of Perinatology
Dorothea E Rogge, Julia Y Nicklas, Sebastian A Haas, Daniel A Reuter, Bernd Saugel
BACKGROUND: Increasing rates of obesity create new challenges for hemodynamic monitoring in the perioperative phase. Continuous monitoring of arterial pressure (AP) is important in severely obese patients who are at particular risk for cardiovascular complications. Innovative technologies for continuous noninvasive AP monitoring are now available. In this study, we aimed to compare continuous noninvasive AP measurements using the vascular unloading technique (CNAP system; CNSystems, Graz, Austria) compared with invasive AP measurements (radial arterial catheter) in severely obese patients during laparoscopic bariatric surgery...
February 2018: Anesthesia and Analgesia
Young Mee Choi, David Leopold, Kristen Campbell, Jane Mulligan, Greg Z Grudic, Steven L Moulton
INTRODUCTION: Physiologic compromise in children with acute appendicitis has heretofore been difficult to measure. We hypothesized that the Compensatory Reserve Index (CRI), a novel adjunctive cardiovascular status indicator, would be low for children presenting with acute appendicitis in proportion to their physiological compromise, and that CRI would rise with fluid resuscitation and surgical management of their disease. METHODS: Ninety-four children diagnosed with acute appendicitis were monitored with a CipherOx CRI™ M1 pulse oximeter (Flashback Technologies Inc...
February 2018: Journal of Pediatric Surgery
Kai Kuck, Philip D Baker
The most commonly monitored variable for perioperative hemodynamic management is blood pressure. Several indirect noninvasive blood pressure monitoring techniques have been developed over the last century, including intermittent techniques such as auscultation (Riva-Rocci and Korotkoff) and oscillometry (Marey) and continuous techniques. With the introduction of automated noninvasive blood pressure devices in the 1970s, the oscillometric technique quickly became and remains the standard for automated, intermittent blood pressure measurement...
November 17, 2017: Anesthesia and Analgesia
Rodrigo Nazário Leão, Pedro Marques Da Silva, Rita Marques Pocinho, Marta Alves, Daniel Virella, Roberto Palma Reis
BACKGROUND: Impedance cardiography (ICG) is a noninvasive hemodynamic monitoring tool which can define hypertensive patients' hemodynamic profiles and help to tailor antihypertensive therapy. This study assesses the concordance between ICG-derived indexes used to evaluate left ventricular performance and transthoracic echocardiography (TTE) in hypertensive patients. METHODS: In this IMPEDDANS post-hoc analysis, the ICG-derived indexes are compared with TTE by Bland-Altman method...
November 27, 2017: Clinical and Experimental Hypertension: CHE
Salah Al-Zaiti, Samir Saba, Rodolfo Pike, Jennifer Williams, Fadi Khraim
BACKGROUND: A prolonged corrected QT (QTc) interval is a known risk factor for adverse cardiac events. Understanding the determinants and physiologic correlates of QTc is necessary for selecting proper strategies to reduce the risk of adverse events in high-risk patients. We sought to evaluate the role of arterial stiffness in heart failure as a determinant of QTc prolongation. METHOD: This was an observational study that recruited ambulatory heart failure patients (New York Heart Association Classes I-II) from an outpatient heart failure clinic...
January 1, 2017: Biological Research for Nursing
Ali Kassab, Jérôme Le Lan, Julie Tremblay, Phetsamone Vannasing, Mahya Dehbozorgi, Philippe Pouliot, Anne Gallagher, Frédéric Lesage, Mohamad Sawan, Dang Khoa Nguyen
Continuous brain imaging techniques can be beneficial for the monitoring of neurological pathologies (such as epilepsy or stroke) and neuroimaging protocols involving movement. Among existing ones, functional near-infrared spectroscopy (fNIRS) and electroencephalography (EEG) have the advantage of being noninvasive, nonobstructive, inexpensive, yield portable solutions, and offer complementary monitoring of electrical and local hemodynamic activities. This article presents a novel system with 128 fNIRS channels and 32 EEG channels with the potential to cover a larger fraction of the adult superficial cortex than earlier works, is integrated with 32 EEG channels, is light and battery-powered to improve portability, and can transmit data wirelessly to an interface for real-time display of electrical and hemodynamic activities...
January 2018: Human Brain Mapping
Xiaohong Lin, Shiyang Xu, Hada Fong-Ha Ieong, Zhen Yuan
Functional near-infrared spectroscopy (fNIRS) has emerged as a highly promising brain mapping technique that enables continuously and noninvasively monitoring the hemodynamic responses in the human brain. In this study, fNIRS was utilized to identify the different brain activation patterns between pathological gamblers (PGs) and healthy controls (HCs). Specifically, we examined the hemodynamic changes in the prefrontal cortex using fNIRS recordings during the completion of executive function and decision-making tasks for both PGs and HCs...
July 20, 2017: Applied Optics
Jihad Mallat, Benoit Vallet
In critically ill patients, tissue hypoperfusion is an important cause leading to multi- organ dysfunction and death, and it cannot always be detected by measuring standard global hemodynamic and oxygen-derived parameters. Gastric intramucosal PCO2 as measured by gastric tonometry has been recognized to be of clinical value as a prognostic factor, in assessing the effects of particular therapeutic interventions, and as an end-point of resuscitation. However, this technique has several limitations that have hampered its implementation in clinical practice...
October 4, 2017: Minerva Anestesiologica
Georg Daeschlein, Inga Langner, Thomas Wild, Sebastian von Podewils, Claudia Sicher, Thomas Kiefer, Michael Jünger
Monitoring of perfusion is a cornerstone in surgery, phlebology and basic science to proof wound healing by interventions. In chronic wound management it is of utmost importance to realize and parametrize wound bed perfusion to verify actual, and plan further treatment by noninvasive diagnostics. Up to now monitoring is based on visual inspection of wounds as conventionally practiced over more than decades. The main problems of visual inspection are the lack of standardization and comparability because of interindividual variations...
September 4, 2017: Clinical Hemorheology and Microcirculation
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