Ambulatory venous pressure revisited

Area of Science:

• Vascular Surgery
• Venous Physiology
• Diagnostic Methods

Background:

• Chronic venous insufficiency (CVI) affects a significant portion of the population.
• Accurate measurement of deep venous pressure is crucial for diagnosing and managing CVI.
• Current methods may not fully capture dynamic pressure changes in deep veins.

Purpose of the Study:

• To introduce a method for measuring deep venous pressure in the lower extremity.
• To compare deep venous pressure measurements with those from the dorsal foot vein.
• To assess the accuracy of dorsal foot vein pressure in reflecting deep venous system status.

Main Methods:

• Cannulation of the posterior tibial vein and dorsal foot vein.
• Insertion of a catheter with a pressure transducer at the knee joint level.
• Simultaneous pressure recording during toe stands at various calf levels.

Main Results:

• In 45 CVI patients, deep knee joint pressure dropped by -15% during toe stands, while dorsal foot vein pressure dropped significantly more (-75%).
• Dorsal foot vein pressure decreased in all patients, but popliteal vein pressure varied, increasing in some and decreasing in others.
• Deep vein recovery time was shorter than dorsal vein recovery time, especially in limbs with superficial venous incompetence.

Conclusions:

• Ambulatory dorsal foot venous pressure is not a reliable indicator of tibial and popliteal vein pressure changes.
• Deep venous pressure can exhibit different patterns (decrease or increase) irrespective of dorsal foot vein pressure readings.
• The proposed method offers a more accurate assessment of deep venous hemodynamics in CVI patients.