New non invasive marker of Heart Failure with pulmonary congestion: thoracic electrical bioimpedance

2008 ◽  
Vol 7 ◽  
pp. 43-43
Author(s):  
F BAUER ◽  
S CORDIERPOUCHAIN ◽  
E BENMOKHTAR ◽  
B KURTZ ◽  
G GREZISSOULIE ◽  
...  
Keyword(s):  
Heart Failure ◽  
Pulmonary Congestion ◽  
Non Invasive ◽  
Thoracic Electrical Bioimpedance ◽  
Electrical Bioimpedance

scholarly journals Low Cost Non-İnvasive Portable Monitor Platform for Cardiac Biopotential and Transthoracic Impedance Measurements

2021 ◽  
Author(s):  
Oya Köksal ◽  
Erdem Haberal
Keyword(s):  
Reference Value ◽  
Raspberry Pi ◽  
Invasive Technique ◽  
Impedance Change ◽  
Thoracic Impedance ◽  
Current Frequency ◽  
Impedance Measurements ◽  
Non Invasive ◽  
Thoracic Electrical Bioimpedance ◽  
Electrical Bioimpedance

Abstract Purpose Simultaneous monitoring of ECG and thoracic electrical bioimpedance (TEB) is important in evaluating cardiovascular performance. TEB is a non-invasive technique based on measuring the impedance value that changes in the chest area depending on the heartbeat. Within the framework of this study, it can be used in home monitoring and biotelemetry applications to measure thoracic electrical bioimpedance (TEB), ECG and ICG. Methods Within the scope of this study, a four-electrode TEB measurement system was designed and built using the Raspberry Pi single board computer and its original monitor, ESP32 and EVAL-ADAS1000SDZ evaluation board. With the designed system, ECG and thoracic impedance measurements at 50 kHz current frequency were taken as real-time over a single channel. Delta_Z and ICG signals were created from thoracic impedance values with the developed software.ResultsWhile the thoracic impedance value varies between 15-45 Ω, the 67 thoracic impedance value measured with the designed system is approximately 1000 times the 68 reference value. The impedance change in the thoracic region was measured with the designed 69 system between 0.1-0.2 Ω values, and the compatibility of these values with reference values was 70 determined. While the reference value of the dZ / dt signal is 0.8 - 3.5 Ω / s, this value is between 2.3 - 71 5.3 Ω / s in the measurements taken with the designed system.Conclusion The prototype is achieved in detecting small changes in the thoracic impedance signal. The prototype is cheap, portable, small-sized and medically safe, so it is suitable for home care services and clinics. In addition, the developed system can be adapted to wearable technology. In order to increase the success of the system, the impedances values added to the thoracic impedance value should be determined and a calibration procedure should be established.

scholarly journals Thoracic electrical bioimpedance in the follow-up of patients with cardiovascular disorders

2005 ◽  
Vol 133 (5-6) ◽  
pp. 297-302
Author(s):  
Vesna Stojanov ◽  
Mirko Saranovic ◽  
Branko Jakovljevic ◽  
Katarina Paunovic
Keyword(s):  
High Frequency ◽  
Invasive Technique ◽  
Non Invasive ◽  
Arterial Blood ◽  
Thoracic Electrical Bioimpedance ◽  
Patients With Heart Failure ◽  
Before And After ◽  
Electrical Bioimpedance ◽  
Low Amplitude

Thoracic electrical bioimpedance is a new non-invasive technique for obtaining haemodynamic parameters. The method involves the passing of low amperage, high frequency current through the thorax. The current induces a change of resistance within the thorax, which is registered by electrodes. The overall impedance of the thorax is a measure of the electrical resistance of the thorax to this high frequency, low amplitude current. In clinical practice, thoracic electrical bioimpedance has been applied in diagnostic, therapeutic, and prognostic use in patients with heart failure and hypertension, patients with pacemakers, within the scope of early diagnosis of implant rejection following heart transplantation, as well as in patients with kidney disorders, before and after dialysis. However, one of its most important applications is in the determination of antihypertensive therapy, because it provides the parameters that reflect the genesis of arterial blood pressure, in assessing these parameters, optimal therapy adjusted to the haemodynamic status of each patient can be prescribed.

scholarly journals Non-invasive thoracic electrical bioimpedance technique-derived hemodynamic reference ranges in Chinese Han adults

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Qing-Long Meng ◽  
Yan Sun ◽  
Hui-Jing He ◽  
Hao Wang ◽  
Guang-Liang Shan
Keyword(s):  
Reference Ranges ◽  
Chinese Han ◽  
Non Invasive ◽  
Thoracic Electrical Bioimpedance ◽  
Electrical Bioimpedance ◽  
Han Adults

Thoracic electrical bioimpedance: a non-invasive measure of cardiac output for porcine research

1998 ◽  
Vol 32 (3) ◽  
pp. 324-329
Author(s):  
C. J. Broomhead ◽  
S. J. Wright ◽  
K. M. Kiff ◽  
P. S. Withington
Keyword(s):  
Cardiac Output ◽  
Correlation Coefficient ◽  
Comparative Studies ◽  
Porcine Model ◽  
Continuous Data ◽  
Large White ◽  
Pearson Product Moment Correlation ◽  
Non Invasive ◽  
Thoracic Electrical Bioimpedance ◽  
Electrical Bioimpedance

A comparison of two techniques for measuring cardiac output, thermodilution (TD) and thoracic electrical bioimpedance (TEB), was undertaken in a porcine model. Eight anaesthetized large white pigs were studied. A total of 436 paired measurements were performed over a range of cardiac outputs from 1.7 to 15.11/min as measured by thermodilution. The Pearson product moment correlation coefficient was r=0.963 with P < 0.001. Analysis by Bland and Altman statistics revealed a mean difference (bias) of -0.021/min and the limits of ±1.6l/min, similar to figures found in human comparative studies. These results confirm that thoracic electrical bioimpedance is a valid method of measuring cardiac output in pigs. It has significant advantages compared to thermodilution, in particular it is cheap, simple to use, non-invasive and provides continuous data.

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