View clinical trials related to Hemodynamics.
Filter by:By assessing the safety and durability of an endovascular intervention, this study will justify and inform the design of a subsequent seamless feasibility/pivotal trial aimed at the treatment of intracranial atherosclerotic stenosis (ICAS), an entity which carries a high risk of stroke despite existing medical therapies, and has no other treatment options. Given the global burden of ICAS as a leading cause of stroke, there is a high potential for public health impact not just in the U.S., but world-wide.
Different ventilation modes can be used in laparoscopic surgeries. These surgeries are performed in steep Trendelenburg position with serious hemodynamic disturbances. This study aims to observe the hemodynamic effects of two different ventilation modes in laparoscopic gynecologic surgery performed in steep Trendelenburg position.
BACKGROUND: Spinal anesthesia (SA) induced maternal hypotension is the most frequent and troublesome complication in cesarean section (CS), compromising both maternal and neonatal well-being. Many strategies have been used to prevent its occurrence but no single technique has been confirmed to be completely effective. the investigators hypothesized that ondansetron, a serotonin-receptor-antagonist, could have beneficial effects on maternal hemodynamics during CS under SA. METHODS: In this prospective double-blind placebo-controlled study, one hundred healthy parturients were randomized to receive either 8 mg of intravenous ondansetron (group O) or the same volume of saline (group S), 5 minutes prior to the induction of SA. All women received a coloading volume of 500 ml of saline. Maternal hemodynamics: blood pressure, heart rate and cardiac output (CO) were measured with a non-invasive device based on pulse wave transit time: the esCCO device Nihon Kohden hemodynamic monitor. Ephedrine was administered to treat hypotension (systolic blood pressure less than 80% of baseline).
Comparability of discontinuous non-invasive (sphygomanometric) and continuous semi-invasive and invasive (Masimo©; Nexfin© Monitoring ; FloTrac © Edwards Lifesciences) beat to beat measurement methods for the determination of cardiac output and fluid responsiveness in patients undergoing bariatric surgery.
Background: Detection of coronary artery disease (CAD) is important due to its high prevalence and its medical and economic implications. Purpose: A systematic review of the diagnostic performance of stress echocardiography (Echo), SPECT, cardiac magnetic resonance (CMR), CT Perfusion (CTP) and PET versus invasive coronary angiography (ICA) or fractional flow reserve (FFR) using hierarchical summary ROC (HSROC) methods. Data Sources: MEDLINE, EMBASE and SCOPUS for literature published in English or Spanish from January 1970 to December 2015. Study Selection: For inclusion, studies had to meet the Cochrane guidelines, had to evaluate the sensitivity and specificity methods, and use ICA and/or FFR. Only those studies with STARD methodology ≥60% were included. Data Extraction: Ten investigators extracted patient and study characteristics and 4 resolved any disagreements.
There are different methods for measuring cardiac output (CO) completely non-invasive, which are used today. Two of these should be used in the study to examine the CO in an older group of patients (> 65 years) undergoing major trauma surgery. The first method is the esCCOTM-technology by Nihon Kohden, the second uses the Volume Clamped Method via a finger-cuff by Nexfin Edwards life sciences. Both technologies work continuously and fully non-invasive. The measured data will be compared to established standard procedures like semi-invasive pulse contour analysis using the Flotrac-Vigileo system. The study should answer the following questions: How accurate and precise are the non-invasive methods? How large is the percentage deviation in comparison to the established standard? Are there any limitations of measuring accuracy regarding the age of the patient? The continuous hemodynamic monitoring of patients during surgery has recently changed from invasive and semi-invasive methods to completely non-invasive technologies. The accuracy and precision of this way of measuring cardiovascular parameters in comparison to the invasive standard is still controversial. Especially for older patient with atherosclerotic alteration of the blood vessels the utility of non-invasive monitoring systems is not shown yet. But principally this group with a high level of comorbidity might profit notably from less invasive procedures. This is the reason for the planed research.
There are different methods for measuring cardiac output (CO) completely non-invasive, which are used today. Two of these should be used in the study to examine the CO in an older group of patients (> 65 years) undergoing major trauma surgery. The first method is the esCCOTM-technology by Nihon Kohden, the second uses the Volume Clamped Method via a finger-cuff by Nexfin Edwards life sciences. Both technologies work continuously and fully non-invasive. The measured data will be compared to established standard procedures like semi-invasive pulse contour analysis using the Flotrac-Vigileo system. The study should answer the following questions: - How accurate and precise are the non-invasive methods? How large is the percentage deviation in comparison to the established standard? - Are there any limitations of measuring accuracy regarding the age of the patient? The continuous hemodynamic monitoring of patients during surgery has recently changed from invasive and semi-invasive methods to completely non-invasive technologies. The accuracy and precision of this way of measuring cardiovascular parameters in comparison to the invasive standard is still controversial. Especially for older patient with atherosclerotic alteration of the blood vessels the utility of non-invasive monitoring systems is not shown yet. But principally this group with a high level of comorbidity might profit notably from less invasive procedures. This is the reason for the planed research.
Primary objective: To document change in translesional pressure gradients (TLPGs) and ratios (fractional flow reserve) using the NAVVUS RXi catheter following endovascular treatment for symptomatic lower extremity peripheral arterial disease. Secondary objectives: - Evaluation of correlation of the ABI and TBI and TLPGs at baseline and following endovascular therapy - Evaluation of the correlation between the change in WIQ, TCOMs, wound size and change in TLPGS - Evaluation of correlation between lesion severity by QVA (MLD, % diameter stenosis) and TLPGs - Evaluation of baseline MLA, MLD, plaque burden by intravascular ultrasound (optional) and TLPGs
In this retrospective analysis investigators will study the effects of using a minimally invasive hemodynamic monitoring (FloTrac-Edwards) on postoperative outcomes. Participants will compare a control group to a case group; in both groups ASA 1 patients suffering from advanced ovarian cancer underwent radical cytoreductive surgery. In case group hemodynamic was managed by using the FloTrac system; in the control group a standard hemodynamic monitoring was used.
Delta Pulse Pressure and Delta Down have been validated in surgery upon closed chest. This study aim to evaluate the influence of sternotomy on the value of Delta Pulse Pressure and Delta Down.