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1. An intravascular cell therapy device comprising a scaffold that is radially adjustable between a contracted orientation suitable for transluminal delivery to a vascular locus and an expanded orientation suitable for embedding in a vascular wall, in which the scaffold comprises a plurality of sidewall panels arranged around a longitudinal axis of the scaffold, and adjustable couplings between the sidewall panels configured for adjustment of the scaffold between the expanded orientation and the contracted orientation, in which each sidewall panel includes a porous matrix formed by electrospinning and configured for being seeded with cells, retaining the cells after implantation in a vascular environment, and degrading in a vascular environment, and live proangiogenic cells loaded into the porous matrix, in which the porous matrix has an average pore size of 30 to 100 microns, and in which the porous matrix is suitable for releasing proangiogenic factors secreted by the live proangiogenic cells into the vascular environment, wherein the adjustable couplings between the sidewall panels are adjustable between an inwardly folded configuration when the scaffold is in the contracted orientation and an unfolded extended configuration when the scaffold is in the expanded orientation, wherein in the inwardly folded configuration the adjustable couplings extend inward from the sidewall panels.
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