CVI: Causes, diagnosis and modern treatment options

In this article, you will learn how CVI is diagnosed, what treatment options are available and why modern methods such as VenaSeal (vein glue) play an important role in phlebology. It also explains how the condition is linked to varicose veins (varicosis) and what preventative measures sufferers can take.

Causes of chronic venous insufficiency (CVI)

The causes of CVI are varied and usually result from a combination of genetic factors and external influences. The most important risk factors include

• Genetic predisposition: A familial predisposition increases the risk of developing CVI. People with first-degree relatives who suffer from varicose veins or other venous diseases have a significantly higher risk of also being affected.
• Standing or sitting for long periods: Occupations that require standing or sitting for long periods of time encourage blood to back up in the legs. Venous return is made more difficult, which leads to chronic overloading of the veins.
• Overweight: Being overweight puts additional pressure on the veins in the legs and promotes the development of chronic venous insufficiency.
• Pregnancy: During pregnancy, hormonal changes and the pressure of the growing fetus on the veins increase the strain on the venous system. This can lead to temporary or long-term CVI.
• Age: With increasing age, the elasticity of the vein walls deteriorates, which leads to an increased likelihood of venous valve insufficiency and thus to CVI.

Connection between CVI and varicosis (varicose veins)

There is a close connection between CVI and the development of varicose veins, also known as varicosis. Varicose veins are caused by the backflow of blood in the superficial veins, which leads to their dilation. In truncal varicosis, larger veins, in particular the great saphenous vein or the saphenous vein parva, are affected. These veins play a crucial role in transporting blood back to the heart. Untreated varicosis can worsen CVI and lead to more serious complications, such as skin changes, venous ulcers or deep vein thrombosis.

Classification of CVI according to CEAP

The CEAP classification is used to better classify the severity of CVI and the anatomical structures affected. It is based on four criteria: clinical presentation (C), aetiology (E), anatomy (A) and pathophysiology (P). This classification helps to accurately document the condition of the veins and the course of the disease.

C – Clinical presentation (Clinical)

• C0: No visible or palpable signs of venous disease.
• C1: Spider veins (telangiectasia) and reticular veins.
• C2: Varicose veins (varicosis), visibly tortuous veins.
• C3: Edema (swelling), which indicates impaired venous function.
• C4a: Skin changes such as pigmentation and eczema.
• C4b: Advanced skin changes, including lipodermatosclerosis and atrophie blanche.
• C5: Healed venous ulcers.
• C6: Active, open venous ulcers (ulcers).

E – Etiology (Etiological)

• Ep: Primary venous insufficiency without recognizable cause.
• It: Secondary venous insufficiency due to previous deep vein thrombosis or other venous diseases.
• Ec: Congenital venous disease.

A – Anatomy (Anatomical)

• As: Superficial veins are affected.
• Ad: Deep veins are affected.
• Ap: Perforating veins (connection between deep and superficial veins) are affected.

P – Pathophysiology (Pathophysiological)

• Pr: Reflux (backflow of blood due to defective venous valves).
• Buttocks: Obstruction (narrowing or blockage of the veins).

The CEAP classification makes it possible to systematically record the disease and select the right therapy for the respective degree of severity of the CVI.

Diagnosis of CVI

A comprehensive diagnosis of chronic venous insufficiency is essential in order to accurately determine the extent of the disease and plan appropriate treatment. Modern phlebology offers various diagnostic procedures that enable a precise assessment of vein function.

1. clinical examination and medical history

The first step in diagnosing CVI is a detailed medical history, during which the phlebologist asks the patient about symptoms, family history and possible risk factors. Particular attention is paid to typical complaints such as swelling, a feeling of heaviness in the legs, pain, cramps or skin changes. This is followed by a clinical examination, during which the doctor examines visible signs such as varicose veins, skin changes or ulcers.

2. duplex sonography (ultrasound)

Duplex ultrasonography is the most important diagnostic tool in the diagnosis of CVI. It is a combination of ultrasound and Doppler technology that allows the structure of the veins and blood flow to be visualized in real time. Sonography enables the exact assessment of the venous valves and shows whether there is a backflow of blood (reflux). This method is non-invasive, painless and enables a detailed analysis of the superficial and deep veins.

3. light reflection rheography (LRR)

Light reflection rheography is a procedure for measuring venous return in the legs. Infrared light is directed onto the skin to measure the blood flow in the superficial veins. This method is particularly helpful in assessing the functional status of the venous valves and determining the severity of CVI.

4. phlebography

Phlebography is used in more complex cases of CVI, especially if deep vein thrombosis is suspected. A contrast agent is injected into the veins in order to visualize their course and possible constrictions or occlusions on X-ray images. This method is used less frequently, as duplex sonography provides sufficient information in most cases.

5. venous pressure measurement

Venous pressure measurement is another method for assessing the severity of CVI. The pressure in the veins is measured before and after compression to determine how well the venous valves are functioning and whether venous return is normal.

Modern treatment methods for CVI

The treatment of chronic venous insufficiency has developed considerably in recent years. Thanks to modern, minimally invasive procedures, it is now possible to treat CVI effectively without the need for extensive surgery. The most important treatment methods are

1. compression therapy

Compression therapy is the cornerstone of any CVI treatment. It works by wearing compression stockings or bandages that exert pressure on the veins and support the return flow of blood to the heart. Compression therapy is particularly effective in the early stages of CVI, but can also be used in combination with other treatment methods in advanced stages.

2. VenaSeal (vein glue)

VenaSeal is an innovative, minimally invasive procedure for the treatment of CVI and truncal varicosis, which is based on the application of a special medical adhesive. In this method, the vein glue is injected into the diseased vein using a thin catheter probe, where it sticks the vein walls together and closes the vein. The blood flow is then redirected via healthy veins. VenaSeal is particularly gentle, as no heat or chemicals are used and no compression stockings are required after the procedure. Patients can usually return to their normal activities on the same day. The method is considered one of the most effective and comfortable treatments for CVI.

3. radiofrequency ablation (RFA)

Radiofrequency ablation is a minimally invasive procedure in which a catheter probe is inserted into the affected vein. The vein is heated from the inside using radiofrequency waves, which leads to a controlled closure. Radiofrequency ablation is particularly gentle, as it is less painful than laser therapy and enables a quick recovery time. The method is suitable for patients with varicosis and chronic venous insufficiency.

4. endovenous laser therapy (EVLT)

Endovenous laser therapy is another minimally invasive method for treating varicose veins and CVI. A laser is inserted into the affected vein, which seals the vein using heat. The advantage of this method lies in its precision and the rapid recovery of patients. It is often used in combination with other procedures, especially when larger veins are affected.

5. sclerotherapy

Sclerotherapy is often used to treat smaller veins or spider veins. In this procedure, a special solution is injected into the affected vein, which triggers an inflammation of the vein wall. This closes the vein and redirects the blood flow via healthy veins. Sclerotherapy is particularly effective in the treatment of smaller veins and can be used in combination with other procedures to treat larger varicose veins.

Prevention and lifestyle changes

Prevention plays a crucial role in preventing or slowing down the progression of chronic venous insufficiency. People with a genetic predisposition or risk factors in particular should take care of their veins and make certain lifestyle changes.

1. regular exercise

Regular exercise promotes blood circulation and prevents blood from pooling in the legs. Endurance sports such as walking, swimming or cycling are particularly effective, as they activate the calf muscles and support venous return. People who have to sit or stand for long periods should take regular exercise breaks.

2. weight management

Being overweight increases the pressure on the veins and promotes the development of CVI. A healthy body weight helps to reduce the pressure on the venous system and reduce the risk of complications.

3. leg movements during long periods of sitting or standing

If prolonged sitting or standing cannot be avoided, simple leg exercises should be performed to promote blood flow. Elevating the legs during breaks or circling the feet helps to prevent swelling and improve venous return.

4. avoid tight clothing

Tight clothing around the legs or waist can restrict blood flow and should be avoided. Loose-fitting clothing supports blood circulation and reduces the risk of swelling and discomfort.

5. stop smoking

Smoking not only impairs lung and heart health, but also worsens blood circulation and increases the risk of thrombosis. Stopping smoking can slow down the progression of CVI and reduce the risk of serious complications.

Conclusion

Chronic venous insufficiency is a widespread and often underestimated condition that can lead to serious complications such as venous ulcers if left untreated. However, thanks to modern treatment methods such as VenaSeal (vein glue), radiofrequency ablation and endovenous laser therapy, patients can now be treated effectively and gently. Early diagnosis and treatment are crucial to halting the progression of the disease and improving quality of life. VenaZiel offers innovative and customized treatment options to provide optimal care for patients with CVI and varicosis.