Presentation is loading. Please wait.

Presentation is loading. Please wait.

In vitro testing of a newly developed arteriovenous double-outflow graft  Michael Heise, MD, Petra Kirschner, MD, Antonius Rabsch, MD, Jürgen Zanow, MD,

Published byเดือนเพ็ญ เคนเนะดิ Modified over 5 years ago

Similar presentations

Presentation on theme: "In vitro testing of a newly developed arteriovenous double-outflow graft  Michael Heise, MD, Petra Kirschner, MD, Antonius Rabsch, MD, Jürgen Zanow, MD,"— Presentation transcript:

1 In vitro testing of a newly developed arteriovenous double-outflow graft 
Michael Heise, MD, Petra Kirschner, MD, Antonius Rabsch, MD, Jürgen Zanow, MD, Utz Settmacher, MD, Christoph Heidenhain, MD  Journal of Vascular Surgery  Volume 52, Issue 2, Pages (August 2010) DOI: /j.jvs Copyright © 2010 Society for Vascular Surgery Terms and Conditions

2 Fig 1 In this schematic drawing of the Bi-Flow graft design, the arterial part consists of a straight polytetrafluoroethylene sheet, which widens to a venous diffuser. A flow baffle is used inside the diffuser portion to divide the outflow section into two flow channels. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

3 Fig 2 Hardcopy of the software used to create the 3-dimensional models that were eventually used for the computerized numerical control milling machine. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

4 Fig 3 Image shows the finished silastic model of the small Bi-Flow graft. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

5 Fig 4 Particle image velocimetry provides reconstruction images of the velocity fields obtained representing the 350-millisecond time step during systole. The flow main stream was fully developed. Large separation areas were present in the Venaflo as well as in the diffuser grafts. A laminar flow pattern was visible within the Bi-Flow grafts inside the double channels. However, separation areas developed in the large Bi-Flow model due to the broad widening. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

6 Fig 5 Sheer stresses were calculated in the graft vein junction at the 150-, 250-, and 350-millisecond time step of systole. Although particular high shear stresses were present in the straight end-to-side anastomosis, the shear forces in the remaining models were moderate and significantly lower compared with those in the straight graft anastomosis. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

7 Fig 6 Comparison of flow rates through the silastic models. The systolic pressures of the Berlin Heart were stepwise increased, and the resulting volumetric flow rates were measured. The flow through the small Bi-Flow graft was 21% on average higher compared with the remaining models. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

8 Fig 7 The measured perfusion pressures showed decreased pressures in the small Bi-Flow model, while the highest pressures were found in the straight graft model. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

9 Fig 8 Comparison of the calculated peripheral resistances of the silastic models. The resistance of the small Bi-Flow model was markedly decreased. This finding could possibly explain the flow increase though this model. Journal of Vascular Surgery  , DOI: ( /j.jvs ) Copyright © 2010 Society for Vascular Surgery Terms and Conditions

Download ppt "In vitro testing of a newly developed arteriovenous double-outflow graft  Michael Heise, MD, Petra Kirschner, MD, Antonius Rabsch, MD, Jürgen Zanow, MD,"

Similar presentations

The role of arteriovenous shunts in the pathogenesis of varicose veins Howard C. Baron, M.D., Sebastiano Cassaro, M.D. Journal of Vascular Surgery Volume.

The role of arteriovenous shunts in the pathogenesis of varicose veins Howard C. Baron, M.D., Sebastiano Cassaro, M.D. Journal of Vascular Surgery Volume.
Robot-assisted laparoscopic repair of renal artery aneurysms

Robot-assisted laparoscopic repair of renal artery aneurysms
Without prejudice Journal of Vascular Surgery

Without prejudice Journal of Vascular Surgery
Estimation of brachial artery volume flow by duplex ultrasound imaging predicts dialysis access maturation  Sae Hee Ko, MD, Dennis F. Bandyk, MD, Kelley.

Estimation of brachial artery volume flow by duplex ultrasound imaging predicts dialysis access maturation  Sae Hee Ko, MD, Dennis F. Bandyk, MD, Kelley.
Bedside vena cava filter placement with intravascular ultrasound: A simple, accurate, single venous access method  Donald L. Jacobs, MD, Raghunandan L.

Bedside vena cava filter placement with intravascular ultrasound: A simple, accurate, single venous access method  Donald L. Jacobs, MD, Raghunandan L.
Warren J. Gasper, MD, Christopher D

Warren J. Gasper, MD, Christopher D
Paclitaxel coating on the terminal portion of hemodialysis grafts effectively suppresses neointimal hyperplasia in a porcine model  Insu Baek, PhD, Jinsun.

Paclitaxel coating on the terminal portion of hemodialysis grafts effectively suppresses neointimal hyperplasia in a porcine model  Insu Baek, PhD, Jinsun.
Neointimal hyperplasia associated with synthetic hemodialysis grafts

Neointimal hyperplasia associated with synthetic hemodialysis grafts
Effect of a femoral arteriovenous fistula on lower extremity venous hemodynamics after femorocaval reconstruction  Sunil S. Menawat, MD, Peter Gloviczki,

Effect of a femoral arteriovenous fistula on lower extremity venous hemodynamics after femorocaval reconstruction  Sunil S. Menawat, MD, Peter Gloviczki,
Impact of obesity on venous hemodynamics of the lower limbs

Impact of obesity on venous hemodynamics of the lower limbs
Paul F. Hwang, MD, Dana C. Rice, MD, Sunil V

Paul F. Hwang, MD, Dana C. Rice, MD, Sunil V
Laparoscopic treatment of splenic artery aneurysms

Laparoscopic treatment of splenic artery aneurysms
Jeffrey E. Hull, MD, Boris V. Balakin, PhD, Brad M

Jeffrey E. Hull, MD, Boris V. Balakin, PhD, Brad M
Postthrombotic or non-postthrombotic severe venous insufficiency: Impact of removal of superficial venous reflux with or without subcutaneous fasciotomy 

Postthrombotic or non-postthrombotic severe venous insufficiency: Impact of removal of superficial venous reflux with or without subcutaneous fasciotomy 
Thomas W. Kendall, MD, David L. Cull, MD, Christopher G

Thomas W. Kendall, MD, David L. Cull, MD, Christopher G
Christopher T. Healey, MD, Neil Halin, DO, Mark Iafrati, MD 

Christopher T. Healey, MD, Neil Halin, DO, Mark Iafrati, MD 
A novel technique of vascular anastomosis to prevent juxta-anastomotic stenosis following arteriovenous fistula creation  Ankit Bharat, MD, Mathew Jaenicke,

A novel technique of vascular anastomosis to prevent juxta-anastomotic stenosis following arteriovenous fistula creation  Ankit Bharat, MD, Mathew Jaenicke,
A percutaneous arterial closure protocol can decrease complications after endovascular interventions in vascular surgery patients  Philip P. Goodney,

A percutaneous arterial closure protocol can decrease complications after endovascular interventions in vascular surgery patients  Philip P. Goodney,
Creation and closure of temporary arteriovenous fistulas for venous reconstruction or thrombectomy: Description of technique  Richard J. Sanders, M.D.,

Creation and closure of temporary arteriovenous fistulas for venous reconstruction or thrombectomy: Description of technique  Richard J. Sanders, M.D.,
Howard E. Katzman, MD, Robert B. McLafferty, MD, John R

Howard E. Katzman, MD, Robert B. McLafferty, MD, John R

Similar presentations

Ads by Google