Which of the following procedures is contraindicated in patients with acute thrombophlebitis?

In patients with acute thrombophlebitis, anticoagulation therapy is contraindicated because it can exacerbate the condition. Thrombophlebitis involves inflammation of a vein, often accompanied by a thrombus (blood clot). Administering anticoagulants may increase the risk of clot dislodgement and subsequent complications, such as pulmonary embolism or worsening the inflammation. Instead, management typically focuses on alleviating symptoms and preventing further complications without the use of anticoagulants.

Surgical thrombectomy, removal of intravenous catheters, and compression therapy are more appropriate management strategies in this context. Surgical thrombectomy could be indicated in cases of a significant thrombus causing severe symptoms. Removal of an intravenous catheter is often necessary if it is the source of irritation and inflammation, and compression therapy can help in relieving symptoms associated with superficial thrombophlebitis.