What are catheter-based vein treatments?

Vein treatment terms pile up quickly, and a reader in Tinley Park can reasonably wonder what "catheter-based" adds to the picture. This page answers that one term and keeps its neighbors visible.
Catheter-based, as the publisher puts it
my.clevelandclinic.org defines it in one sentence: With catheter-based treatments, your provider uses a catheter (thin tube) to provide treatment.
The neighboring terms
Vein stripping is a neighboring term with pages of its own on this site, and it should be read from its own pages rather than blended with this one. For the wider range of options, Cleveland Clinic's page on venous disease treatments is the source of the sentence above.
Conditions behind the treatments
The same publisher describes the vein conditions in the Cleveland Clinic overview of venous disease and in its guide to varicose veins.
The follow-up question
Once the term is clear, the next question is how long recovery takes after such a procedure.