Once endothelial swelling subsides, circulation will often become re-established.<unk> s may never recover. Many smaller veins are created by the body to circulate the blood, but they are not adequate for injections or IVs.
Collapsed vein
Dural ectasia
Varicose veins
Arteriovenous fistula
Pump thrombosis
Necklace of Venus
Venous cutdown
Dural arteriovenous fistula