278 Assessing effects of lateral tilt on cardiac output using a Non-invasive technique

2021 ◽  
Vol 224 (2) ◽  
pp. S182-S183
Author(s):  
Zaid Diken ◽  
Antonio F. Saad ◽  
Sema Hajmurad ◽  
Rakesh Vadhera ◽  
Michelle Simon ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Invasive Technique ◽  
Lateral Tilt ◽  
Non Invasive

Cardiac Output Measured by Transthoracic Impedance Cardiography at Rest, during Exercise and at Various Lung Volumes

1982 ◽  
Vol 63 (2) ◽  
pp. 107-113 ◽  
Author(s):  
A. T. Edmunds ◽  
S. Godfrey ◽  
Marion Tooley
Keyword(s):  
Cardiac Output ◽  
Lung Volume ◽  
Impedance Cardiography ◽  
Close Correlation ◽  
Invasive Technique ◽  
Breath Holding ◽  
Impedance Measurements ◽  
Respiratory Illnesses ◽  
Non Invasive ◽  
Transthoracic Impedance

1. Cardiac output measured by transthoracic impedance cardiography has been compared with simultaneous measurements made by the indirect Fick CO2 rebreathing method in nine adults and 14 children. All were healthy normal volunteers. Sixty-six comparisons were made at rest and during steady exercise at work loads up to 100 W. 2. Impedance measurements of cardiac output were consistently higher than indirect Fick measurements of cardiac output, but after application of a correction factor related to packed cell volume there was close correlation between the results obtained by the two methods (r = 0·94). 3. The mean coefficient of variation of impedance measurements of cardiac output was 13% at rest and 5% during steady-state exercise. 4. Changes of lung volume due to breath holding or resulting from addition of an expiratory resistance did not affect the measurement of cardiac output by impedance. 5. Transthoracic impedance cardiography is a rapid, non-invasive technique for measurement of cardiac output. It requires very little active co-operation from the subject. The method would probably give reliable results for patients with respiratory illnesses such as acute asthma or bronchiolitis, during which changes of lung volume may be expected to occur.

scholarly journals The use of an external ultrasound fixator (Probefix) on intensive care patients: a feasibility study

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
M. J. Blans ◽  
F. H. Bosch ◽  
J. G. van der Hoeven
Keyword(s):  
Cardiac Output ◽  
Intensive Care ◽  
Feasibility Study ◽  
Invasive Technique ◽  
Dynamic Parameters ◽  
Fixed Position ◽  
Intensive Care Patients ◽  
Non Invasive ◽  
Accuracy Of Measurements ◽  
Before And After

Abstract Background In critical care medicine, the use of transthoracic echo (TTE) is expanding. TTE can be used to measure dynamic parameters such as cardiac output (CO). An important asset of TTE is that it is a non-invasive technique. The Probefix is an external ultrasound holder strapped to the patient which makes it possible to measure CO using TTE in a fixed position possibly making the CO measurements more accurate compared to separate TTE CO measurements. The feasibility of the use of the Probefix to measure CO before and after a passive leg raising test (PLR) was studied. Intensive care patients were included after detection of hypovolemia using Flotrac. Endpoints were the possibility to use Probefix. Also CO measurements with and without the use of Probefix, before and after a PLR were compared to the CO measurements using Flotrac. Side effects in terms of skin alterations after the use of Probefix and patient’s comments on (dis)comfort were evaluated. Results Ten patients were included; in eight patients, sufficient recordings with the use of Probefix could be obtained. Using Bland–Altman plots, no difference was found in accuracy of measurements of CO with or without the use of Probefix before and after a PLR compared to Flotrac generated CO. There were only mild and temporary skin effects of the use of Probefix. Conclusions In this small feasibility study, the Probefix could be used in eight out of ten intensive care patients. The use of Probefix did not result in more or less accurate CO measurements compared to manually recorded TTE CO measurements. We suggest that larger studies on the use of Probefix in intensive care patients are needed.

scholarly journals Impact of Maternal Lateral Tilt On Cardiac Output During Caesarean Section Under Spinal Anaesthesia: A Prospective Observational Study

2022 ◽  
Author(s):  
Chiara Sonnino ◽  
Luciano Frassanito ◽  
Alessandra Piersanti ◽  
Pietro Paolo Giuri ◽  
Bruno Antonio Zanfini ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Stroke Volume ◽  
Prospective Observational Study ◽  
Primary Outcome ◽  
Final Analysis ◽  
Arterial Elastance ◽  
Lateral Tilt ◽  
Non Invasive ◽  
Hemodynamic Variables ◽  
Continuous Hemodynamic Monitoring

Abstract Background: Left uterine displacement (LUD) has been questioned as an effective strategy to prevent aortocaval compression after spinal anesthesia (SA) for cesarean delivery (CD). We tested if LUD has a significant impact on cardiac output (CO) in patients undergoing CD under SA during continuous non-invasive hemodynamic monitoring.Methods: Forty-six patients were included in the final analysis. We considered 4 timepoints of 5 minutes each: T1=baseline with LUD; T2=baseline without LUD; T3=after SA with LUD; T4=after SA without LUD. LUD was then repositioned for CD. Primary outcome was to test if CO decreased from T3 to T4. We also compared CO between T1 and T2 and other hemodynamic variables: mean, systolic and diastolic blood pressure (respectively MAP, SAP and DAP), heart rate (HR), stroke volume (SV), stroke volume variation (SVV), pulse pressure variation (PPV), contractility (dP/dt), dynamic arterial elastance (Eadyn) at the different timepoints. Data on fetal Apgar scores and umbilical arterial and venous pH were collected.Results: CO did not vary from T3 to T4 [CO mean difference -0.02 L/min [95% CI -0.88 to 0.82; p=1]. No significant variation was registered for any variable at any timepoint. Conclusions: LUD did not show a significant impact on CO during continuous hemodynamic monitoring after SA for CD.Trial registration: (retrospectively registered on 03/12/2021) NCT05143684.

Non-Invasive Cardiac Output Measurement: Where Are We Now?

2018 ◽  
Vol 5 (4) ◽  
pp. 221-227
Author(s):  
Mingqiang Li ◽  
Longqiu Yang ◽  
Liwen Zhou ◽  
Jasmine Liu ◽  
Srikant Patel ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Cardiac Output Measurement ◽  
Output Measurement ◽  
Non Invasive

USING DOPPLER TO ASSESS THE FETAL HEALTH FOR THE PREDICTION OF GESTATIONAL OUTCOME

2014 ◽  
pp. 9-18
Author(s):  
Thi Linh Giang Truong ◽  
Vu Quoc Huy Nguyen
Keyword(s):  
Middle Cerebral Artery ◽  
Cerebral Artery ◽  
Umbilical Artery ◽  
Functional Method ◽  
Invasive Technique ◽  
Routine Practice ◽  
Fetal Health ◽  
Uterine Arteries ◽  
Non Invasive ◽  
Key Words Doppler

Background: Assessment of fetal health plays the most important role in prenatal care because of influence of the prediction of gestational outcome. One of the main aims of routine antenatal care is to identify the ‘ at risk ‘ fetus in order to apply clinical interventions which could results in reduced perinatal morbidity and mortality. Doppler ultrasound is a non invasive technique whereby the movement of blood is studied by detecting the change in frequence of reflected sound, Doppler blood flow velocity waves form of fetal side (umbilical artery, middle cerebral artery ...) and maternal side ( uterine arteries) are discussed and monograms for routine practice are presented. Recently this method is important tool for qualifying high risk pregnancies and help early forecasts the health of the babies and mothers disorder. Doppler sonography in obstetrics is a widely accepted functional method of examining the prediction of gestational outcome. Key words: Doppler, umbilical artery, middle cerebral artery, uterine arteries

scholarly journals Thermal Liquid Biopsy (TLB) Focused on Benign and Premalignant Pancreatic Cyst Diagnosis

2020 ◽  
Vol 11 (1) ◽  
pp. 25
Author(s):  
Sonia Hermoso-Durán ◽  
Guillermo García-Rayado ◽  
Laura Ceballos-Laita ◽  
Carlos Sostres ◽  
Sonia Vega ◽  
...  
Keyword(s):  
Liquid Biopsy ◽  
Pancreatic Cyst ◽  
Point Of View ◽  
Invasive Technique ◽  
Background Current ◽  
Interesting Point ◽  
Pancreatic Lesion ◽  
Non Invasive ◽  
Patient Diagnosis ◽  
New Biomarkers

Background: Current efforts in the identification of new biomarkers are directed towards an accurate differentiation between benign and premalignant cysts. Thermal Liquid Biopsy (TLB) has been previously applied to inflammatory and tumor diseases and could offer an interesting point of view in this type of pathology. Methods: In this work, twenty patients (12 males and 8 females, average ages 62) diagnosed with a pancreatic cyst benign (10) and premalignant (10) cyst lesions were recruited, and biological samples were obtained during the endoscopic ultrasonography procedure. Results: Proteomic content of cyst liquid samples was studied and several common proteins in the different groups were identified. TLB cyst liquid profiles reflected protein content. Also, TLB serum score was able to discriminate between healthy and cysts patients (71% sensitivity and 98% specificity) and between benign and premalignant cysts (75% sensitivity and 67% specificity). Conclusions: TLB analysis of plasmatic serum sample, a quick, simple and non-invasive technique that can be easily implemented, reports valuable information on the observed pancreatic lesion. These preliminary results set the basis for a larger study to refine TLB serum score and move closer to the clinical application of TLB providing useful information to the gastroenterologist during patient diagnosis.

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