Bard Peripheral Vascular

The Venaflo^® II Vascular Graft is designed to improve patency by optimizing the hemodynamics at the venous anastomosis.^1-5

Proprietary Hemodynamic Cuff

Reduces turbulence, provides more harmonic blood flow

Hemodynamic Trim Lines

For consistent, optimal cuff shape

Optimized Cuff Geometry

Offers 3x more surface area*, unable to be replicated with a standard non-cuffed graft

* When comparing 6mm and 7mm straight IMPRA^® ePTFE grafts.

Excellent Handling and Suturablility

Cuff edges evert easily, enhancing graft-to-vein interface

Carbon Impregnation

Designed to reduce platelet adhesion

The Power of Hemodynamics

Standard AV Access Graft – Setting up conditions for risk of intimal hyperplasia formation		Venaflo^® II Hemodynamic Cuff Graft – Harnessing hemodynamic forces that help suppress intimal hyperplasia formation


Arrows indicate blood flow throughout the cardiac cycle at the venous anastomosis:

High arterial blood flow enters the graft and creates disruptive turbulent flow patterns		High arterial blood flow is harnessed into laminar flow


Flow split (antegrade / retrograde) is induced from low pressure venous outflow that is unable to harness the high arterial flow rate		Vortical flow is created and cushions the antegrade / retrograde flow split


Reduced flow velocity at the heel and toe (stagnation areas) leads to increased risk of intimal hyperplasia formation		Vortical blood flow sweeps the toe and heel of the cuff, reducing areas of stagnation


The overall blood flow is turbulent and disorganized		The overall blood flow is harmonic and laminar

References

1. Scholz H, Petzold K, Zanow J, Petzold M, Krueger U. The Venaflo II Graft Adaptation to the Vein Diameter (4th International Congress of the Vascular Access Society [VAS]. May 25-27, 2005 Berlin, Germany). Blood Purification 2005;23:227-261.
2. Longest PW, Kleinstreuer C. Computational haemodynamics analysis and comparison study of arterio-venous grafts. J Med Eng Technol 2000;24:102-110.
3. Scholz H, Zanow J, Petzold K, Kruger U, Settmacher U, Petzold M. Five years’ experience with an arteriovenous patch prosthesis as access for hemodialysis. In: Henry ML, ed. Vascular Access for Hemodialysis VI. Chicago, Il: Precept Press; 1999:241-254.
4. Escobar III FS, Schwartz SA, Abouljoud M, et al. Comparison of a new ‘hooded’ graft with a conventional ePTFE graft: A preliminary study. In: Henry ML, ed. Vascular Access for Hemodialysis VI. Chicago, Il: Precept Press; 1999:205-212.
5. Sorom AJ, Hughes CB, McCarthy JT, Jenson BM, Prieto M, Panneton JM, Sterioff S, Stegall MD, Nyberg SL. Prospective, randomized evaluation of a cuffed expanded polytetrafluoroethylene graft for hemodialysis vascular access. Surgery. August 2002;132(No. 2):135-140.