Superficial Thrombophlebitis

Superficial thrombophlebitis (STP) refers to a clot in the superficial vein system.  The clot can occur after a period of inactivity such as prolonged travel in a plane or car but usually occurs spontaneously in a varicose vein due to stasis of blood flow.  The clot will often be associated with inflammation which causes pain and tenderness over the clot.

STP is often regarded as a minor problem but in fact upto 20% of STP can extend into the deep venous system and therefore could dislodge and form a pulmonarty embolus.  Because the clot in STP often extends much further than the tender area it is important that if you have been diagnosed with STP that you have a comprehensive Duplex ultrasound to ensure the clot is not extending towards the deep system - this is called an "acute ascending superficial thrombophlebitis".  If this is happening or the clot has already extended into the deep vein system you will need to have treatment with low molecular weight heparin and/or warfarin.

If the STP is relatively localised on ultrasound and not threatening to spread into the deep vein system, the treatment is Class 2 compression hosiery, anti-inflammatories and regular walking.