|Flow directed||Over the wire catheters|
|extremely light and supple distal end so that they are carried by anterograde blood flow to target positron||These are pushed over a guide wire to the objective.|
|works best when blood flows is up. e.g. arterio-venous shunts||Used when blood flows is slower.|
|size limits the use of liquids and very small particles.||combination of guide wire + a stiffer catheters makes navigation easier.
e.g. Head and neck tumour
|Large lumen allows delivery of both particles and coils.|