Presentation is loading. Please wait.

Presentation is loading. Please wait.

Transit time flow measurement: experimental validation and comparison of three different systems  Guido Beldi, MD, Andreas Bosshard, MD, Otto M Hess,

Published by운택 남 Modified over 5 years ago

Similar presentations

Presentation on theme: "Transit time flow measurement: experimental validation and comparison of three different systems  Guido Beldi, MD, Andreas Bosshard, MD, Otto M Hess,"— Presentation transcript:

1 Transit time flow measurement: experimental validation and comparison of three different systems 
Guido Beldi, MD, Andreas Bosshard, MD, Otto M Hess, MD, Ulrich Althaus, MD, Beat H Walpoth, MD  The Annals of Thoracic Surgery  Volume 70, Issue 1, Pages (July 2000) DOI: /S (00)

2 Fig 1 Principle of transit time flow measurement. Arrowsrepresent ultrasound signal pathway. The Annals of Thoracic Surgery  , DOI: ( /S (00) )

3 Fig 2 Correlations between Doppler and true flow measurements. Given are uncorrected (left) and second-order corrected (right) data for the three systems. All show some differences in flow between veins and arteries; these are minor in system 1 and 2 but significant in system 3. After second-order correction, the differences are negligible. The Annals of Thoracic Surgery  , DOI: ( /S (00) )

4 Fig 3 Correlations between Doppler and true flow measurements. The effects of flow media (saline or blood, left). temperature (25° or 37°C, right). All data are corrected for differences in graft material (arteries or veins). Flow media had only a minor effect on Doppler flow measurements (not significant), whereas temperature produced larger deviations, particularly in system 3, although they are not significant. The Annals of Thoracic Surgery  , DOI: ( /S (00) )

5 Fig 4 Bland-Altman analysis of three systems. Plotted are true flow (x-axis) versus the differences in Doppler minus true flow measurements (y-axis). System 3 shows the largest deviations, which diminish after second-order correction. The Annals of Thoracic Surgery  , DOI: ( /S (00) )

Download ppt "Transit time flow measurement: experimental validation and comparison of three different systems  Guido Beldi, MD, Andreas Bosshard, MD, Otto M Hess,"

Similar presentations

Autologous blood donation with recombinant human erythropoietin in anemic patients  Hiroshi Kiyama, MD, Nagahisa Ohshima, MD, Takao Imazeki, MD, Takashi.

Autologous blood donation with recombinant human erythropoietin in anemic patients  Hiroshi Kiyama, MD, Nagahisa Ohshima, MD, Takao Imazeki, MD, Takashi.
Ultrasound-determined diameter measurements are more accurate than axial computed tomography after endovascular aortic aneurysm repair  Sukgu M. Han,

Ultrasound-determined diameter measurements are more accurate than axial computed tomography after endovascular aortic aneurysm repair  Sukgu M. Han,
Assessment of peripheral skeletal muscle microperfusion in a porcine model of peripheral arterial stenosis by steady-state contrast-enhanced ultrasound.

Assessment of peripheral skeletal muscle microperfusion in a porcine model of peripheral arterial stenosis by steady-state contrast-enhanced ultrasound.
Leena Khaitan, MD, Francis P Sutter, Scott M Goldman, MD 

Leena Khaitan, MD, Francis P Sutter, Scott M Goldman, MD 
Beating heart operations including hybrid revascularization: initial experiences  Friedrich-Christian Riess, MD, Joachim Schofer, MD, Peter Kremer, MD,

Beating heart operations including hybrid revascularization: initial experiences  Friedrich-Christian Riess, MD, Joachim Schofer, MD, Peter Kremer, MD,
Coronary artery bypass grafting on the beating heart evaluated with integrated backscatter  Kenichi Imasaka, MD, Shigeki Morita, MD, Ichiro Nagano, MD,

Coronary artery bypass grafting on the beating heart evaluated with integrated backscatter  Kenichi Imasaka, MD, Shigeki Morita, MD, Ichiro Nagano, MD,
Autologous blood donation with recombinant human erythropoietin in anemic patients  Hiroshi Kiyama, MD, Nagahisa Ohshima, MD, Takao Imazeki, MD, Takashi.

Autologous blood donation with recombinant human erythropoietin in anemic patients  Hiroshi Kiyama, MD, Nagahisa Ohshima, MD, Takao Imazeki, MD, Takashi.
Vascular adaptation of the internal thoracic artery graft early and late after bypass surgery  Beat H. Walpoth, MD, Markus Schmid, MD, Anna Schwab, MD,

Vascular adaptation of the internal thoracic artery graft early and late after bypass surgery  Beat H. Walpoth, MD, Markus Schmid, MD, Anna Schwab, MD,
Coronary artery bypass grafting in patients with advanced left ventricular dysfunction  Gregory D Trachiotis, MD, William S Weintraub, MD, Thomas S Johnston,

Coronary artery bypass grafting in patients with advanced left ventricular dysfunction  Gregory D Trachiotis, MD, William S Weintraub, MD, Thomas S Johnston,
Nitrous Oxide Method of Measuring Cerebral Blood Flow During Hypothermic Cardiopulmonary Bypass  Ian MacVeigh, David J Cook, Thomas A Orszulak, Richard.

Nitrous Oxide Method of Measuring Cerebral Blood Flow During Hypothermic Cardiopulmonary Bypass  Ian MacVeigh, David J Cook, Thomas A Orszulak, Richard.
Thomas V Bilfinger, MD, George B Stefano, PhD 

Thomas V Bilfinger, MD, George B Stefano, PhD 
Color-flow duplex ultrasound scan versus computed tomographic scan in the surveillance of endovascular aneurysm repair  Kathleen G Raman, MD, MPH, Nita.

Color-flow duplex ultrasound scan versus computed tomographic scan in the surveillance of endovascular aneurysm repair  Kathleen G Raman, MD, MPH, Nita.
Evidence of Nitric Oxide Produced by the Internal Mammary Artery Graft in Venous Drainage of the Recipient Coronary Artery  Ferenc I. Tarr, MD, PhD, Mária.

Evidence of Nitric Oxide Produced by the Internal Mammary Artery Graft in Venous Drainage of the Recipient Coronary Artery  Ferenc I. Tarr, MD, PhD, Mária.
Value of Magnetic Resonance Imaging, Angiography, and Fractional Flow Reserve to Evaluate the Left Main Coronary Artery After Direct Surgical Angioplasty 

Value of Magnetic Resonance Imaging, Angiography, and Fractional Flow Reserve to Evaluate the Left Main Coronary Artery After Direct Surgical Angioplasty 
Right internal thoracic artery or saphenous vein grafting

Right internal thoracic artery or saphenous vein grafting
Brent A Grishkin, MD, Robert A Helsel, MD 

Brent A Grishkin, MD, Robert A Helsel, MD 
The Society of Thoracic Surgeons Thoracic Surgery Practice and Access Task Force: 2014 Workforce Report  John S. Ikonomidis, MD, PhD  The Annals of Thoracic.

The Society of Thoracic Surgeons Thoracic Surgery Practice and Access Task Force: 2014 Workforce Report  John S. Ikonomidis, MD, PhD  The Annals of Thoracic.
Mini-sternotomy for off-pump coronary artery bypass grafting

Mini-sternotomy for off-pump coronary artery bypass grafting
Richard Gitter, Chris M. Cate, Kenneth Smart, G.Kimble Jett 

Richard Gitter, Chris M. Cate, Kenneth Smart, G.Kimble Jett 
A randomized comparison of the Saphenous Vein Versus Right Internal Thoracic Artery as a Y-Composite Graft (SAVE RITA) trial: Early results  Ho Young.

A randomized comparison of the Saphenous Vein Versus Right Internal Thoracic Artery as a Y-Composite Graft (SAVE RITA) trial: Early results  Ho Young.

Similar presentations

Ads by Google