Long peripheral cannulas (or mini-midline) lend themselves very well to ultrasound-guided insertion in the deep veins of the arm or forearm.
Their length (6-15 cm) is associated with minimal risk of dislocation with respect to the cannula, as well as a longer duration.
For a limited period of time (a few days) both polyethylene and polyurethane catheters can be used, as well as PEBA.
In terms of cost-effectiveness, at the moment it seems more appropriate to prefer simple and lowcost mini-midlines to be inserted with the classic Seldinger technique (needle - metal guidewire - catheter) compared to more complex mini-midlines, more difficult to use and more expensive , such as those designed as all-in-one coaxial devices.