Comparison of Two Under Knee Lower Limb Bypass Types:Endothelialised Prosthesis Versus Autologous Vein Graft

Randomised Study Comparing Endothelialised Prosthesis and Autologous Vein for Under Knee Revascularisation With Femoro Popliteal Bypass. ePTFE

Status

UNKNOWN

Phases

Phase 2

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00221806

Enrollment

Registered

2005-09-22

Start date

2004-06-30

Completion date

2012-06-30

Last updated

2005-09-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Arteritis

Keywords

Arteritis, femoro popliteal bypass, endothelialised prosthesis, saphenous vein graft, permeability, Doppler echography

Brief summary

The aim of this project is to improve the hemocompatibility of vascular prosthesis with a complete covering of its endoluminal surface with autologous endothelial cells. The objective is to obtain a better bypass permeability with arterial prosthesis replacing low diameter vessels in lower limbs

Detailed description

Physiological vascular endothelium is an hemocompatible and thrombus resistant surface and none of the materials used for revascularisation owns these properties. The aim of this project is to improve the hemocompatibility of vascular prosthesis with a complete covering of their endoluminal surface with autologous endothelial cells. This strategy, that plans to associate an artificial component of synthetic origin and cellular component is a bioartificial vascular substitute concept. First results obtained by an austrian team are really encouraging (with more than 100 patients during last 10 years). Thus, the main objective of this study is to compare efficacy in terms of grafts with endothelialised PTFE prosthesis with great saphenous autologous vein graft for under knee arterial popliteal revascularisation of lower limbs. This is a phase III, randomised equivalent trial. It is open labelled, with 2 parallel well balanced groups. Forty patients will be randomised. A short segment of the cephalic vein will be cut and some blood will be sampled in patients randomised in the ePTFE group. Endothelial cells of the cephalic vein will be isolated, cultured, with autologous serum, and then amplified before sowing of the internal face of PTFE prosthesis, previously covered with a biological glue clinically validated. Before prosthesis implantation, systematic quality controls will be performed. Implantation will be planned 3 weeks after venous sampling. Eventual failure of cellular culture or prosthesis covering will lead to an autologous vein graft. People randomised in the second group will receive an autologous saphenous vein graft. The primary outcome is to demonstrate the equivalence of time dependent permeability rate between endothelialized PTFE and autologous vein graft. Equivalence between both technics would allow to preserve autologous saphenous vein for later distal bypasses (where it is the best technic) or for coronary bypasses.

Interventions

DEVICEendothelialised prosthesis

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Inclusion criteria

Age above 18, male or female, II to IV arteritis level with intermittent limping, under knee femoro popliteal bypass indication. Available saphenous vein, no major trophic trouble, no contra indication to the use of prosthesis. \-

Exclusion criteria

Design outcomes

Primary

Measure	Time frame
Bypass permeability during 5 years after surgery, assessed trough Doppler echography	—

Secondary

Measure	Time frame
Mortality and morbidity, primary and secondary permeability, quality of life, leg salvage, cost/benefit ratio.. All patients will be followed up at 1, 3, 6, and 12 months and each year during 5 years	—

Countries

France

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026