What should be done if superficial thrombophlebitis is septic?

If superficial thrombophlebitis is suspected to be septic, the recommended action is to administer intravenous antibiotics. This is crucial because septic thrombophlebitis involves the presence of infection within the affected vein, which can lead to systemic illness if not treated appropriately. The intravenous route ensures rapid and effective delivery of the antibiotics necessary to combat the infection.

Administering antibiotics helps address the underlying infection and limits complications that can arise from the septic process, such as the formation of abscesses or the spread of the infection to nearby tissues or systemically into the bloodstream (sepsis).

Other options like starting oral anticoagulation or applying cold compresses would not be appropriate in this scenario, as they do not address the immediate need for infection control. Surgical removal of the vein is typically not the first-line treatment unless there are significant complications or a lack of response to medical management. Thus, the administration of IV antibiotics is the most critical step in managing a septic superficial thrombophlebitis.