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Phlebitis – Vein Inflammation: Causes and Treatment

Phlebitis is an inflammation of the vein wall. It most commonly affects superficial veins, causing redness, swelling, and pain along the affected vessel.

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Things worth knowing about "Phlebitis"

Phlebitis is an inflammation of the vein wall. It most commonly affects superficial veins, causing redness, swelling, and pain along the affected vessel.

What is Phlebitis?

Phlebitis is an inflammation of the wall of a vein. It can affect superficial veins (superficial phlebitis) or deep veins. The superficial form is more common and is generally less dangerous than deep vein inflammation. When phlebitis is accompanied by a blood clot, the condition is referred to as thrombophlebitis.

Causes

Phlebitis can be triggered by a variety of factors:

Mechanical irritation: For example, from intravenous catheters, injections, or surgical procedures
Varicose veins: Veins already weakened by varicosities are more susceptible to inflammation
Infections: Bacterial pathogens can cause septic phlebitis
Chemical irritation: Certain medications or infusion solutions can irritate the vein wall
Clotting disorders: Conditions that affect blood coagulation increase the risk
Prolonged immobility: Extended periods of sitting or lying down promote the development of phlebitis

Symptoms

The typical signs of phlebitis include:

Redness along the affected vein
Local warmth and swelling
Pain or tenderness to the touch
Hardening of the tissue above the vein (a palpable, cord-like thickening)
Mild fever (in inflammatory or infectious forms)

Diagnosis

Diagnosis is usually made clinically through physical examination and patient history. The following tests may also be used:

Ultrasound (duplex sonography): To assess the vein and rule out deep vein thrombosis
Blood tests: Inflammatory markers such as CRP and white blood cell count, and D-dimer levels to exclude thrombosis
Blood cultures: In suspected cases of septic phlebitis

Treatment

Treatment depends on the underlying cause and the severity of the phlebitis:

Conservative Measures

Cooling and elevation of the affected area
Compression bandages or compression stockings
Anti-inflammatory medications (e.g., diclofenac gel or tablets)
Topical heparin-containing gels or creams

Medication-Based Treatment

Low-molecular-weight heparin or direct oral anticoagulants for extensive cases or high thrombosis risk
Antibiotics in cases of bacterial (septic) phlebitis

Surgical Interventions

Removal or sclerotherapy of affected varicose veins in recurrent phlebitis

Complications

In most cases, superficial phlebitis resolves without serious consequences. However, possible complications include:

Spread to deep veins, with the risk of deep vein thrombosis (DVT)
Pulmonary embolism if a blood clot detaches and travels to the lungs
Chronic venous insufficiency
Sepsis in untreated bacterial phlebitis

Prevention

The following measures can help prevent phlebitis:

Regular physical activity and avoiding prolonged immobility
Adequate fluid intake
Wearing compression stockings in high-risk individuals
Careful handling of intravenous catheters in clinical settings
Treatment of varicose veins

References

Moll, S. - Phlebitis. MedlinePlus, U.S. National Library of Medicine (2023). Available at: https://medlineplus.gov/ency/article/001108.htm
Gloviczki, P. et al. - The care of patients with varicose veins and associated chronic venous diseases: Clinical practice guidelines of the Society for Vascular Surgery and the American Venous Forum. Journal of Vascular Surgery, 53(5 Suppl), 2S-48S (2011).
Di Nisio, M., Wichers, I. M., Middeldorp, S. - Treatment for superficial thrombophlebitis of the leg. Cochrane Database of Systematic Reviews (2018). DOI: 10.1002/14651858.CD004982.pub6

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