Shall we talk about this important vein in our kidneys (Renal Vein)?

We all know that our kidneys clean the blood in our body and remove unwanted toxins through urine. It works like a water filter in a house. But have you ever wondered how this cleaned, pure blood goes back to our heart and travels throughout the body? That's where this special blood vessel we're talking about today, the renal vein, comes to the rescue. This is someone who silently performs a great service in our body.

Simply put, what is this renal vein?

Very simple. The renal vein is the blood vessel that carries the cleaned blood from the kidneys back to the heart . In medicine, we call things related to the kidneys "renal." That's why it's called the "renal vein."

Normally, we all have two kidneys. So, there is a renal vein associated with each kidney. That means we have two renal veins.

Artery and vein - what is the difference between the two?

You may have heard of the Renal Artery. Now you may be wondering if these two are the same. No, they have two different functions. Our circulatory system is like a network of roads in a big city. Some roads bring vehicles into the city, and others bring vehicles out of the city. That's how it is.

Just think, the oxygen, nutrients, and hormones our bodies need are carried everywhere in the blood. Similarly, the body also removes unwanted waste products, such as carbon dioxide, from the blood.

To clearly understand the function of this artery and vein connected to the kidney, look at this table .

Simply put, blood from the artery enters the kidney to be purified. The purified blood returns to the body from the vein.

Where are these renal veins located?

Our kidneys are located at the back of our abdomen, below the rib cage, and slightly above the waist. The two renal veins are also located there.

• Left Renal Vein: This is located on the left side of the body, behind organs such as the pancreas. This vein is slightly further from the inferior vena cava, the main vein that connects to the heart. Therefore, the left vein is longer than the right one. It is usually about 6-10 centimeters (2-4 inches) long.
• Right Renal Vein: This is located on the right side of the body, behind the upper part of the small intestine. It is shorter because it is closer to the main vein. It is usually about 2-4 centimeters (1-1.5 inches) long.

Where does the renal vein receive blood from?

Here too, there is a slight difference between the left and right veins.

The right renal vein receives blood only from the right kidney. It's very simple.

But the left renal vein is a bit of a busy one. Because it's longer, it collects blood from several other organs along the way. It's like a main road with several side roads.

• Left ureteral vein: Blood from the ureter that carries urine to the bladder.
• Left gonadal vein: Blood from the ovaries in women or the testicles in men.
• Left adrenal vein: Blood from the hormone-producing adrenal gland, located above the kidney.
• Left inferior phrenic vein: Blood from the diaphragm, a muscle that helps us breathe.

Because of this, the left renal vein acts as a very important junction in our body.

Are there any medical conditions that affect the renal veins?

Yes, absolutely. Like every organ, there are several medical conditions that can affect these veins. Here are two of the main ones.

What are the symptoms of a blocked vein?

A renal vein blockage is a serious condition. If it occurs, symptoms such as:

• Severe pain: Pain may occur, especially in the hips and abdomen.
• Blood in the urine (Hematuria): Urine may turn red or brown.
• Dizziness when standing: A drop in blood pressure (orthostatic hypotension) when you stand up suddenly can cause you to feel dizzy.
• Infertility: Can affect both men and women.
• Kidney damage: If blood flow stops, kidney function may be impaired.
• Decreased urine output (Oliguria): You may pass less urine than usual.
• Pulmonary embolism: This is a very dangerous condition. A piece of a blood clot that has formed in a renal vein can break off and travel through the bloodstream, blocking a vein in the lungs. This is a life-threatening emergency.

How do you check the health of these veins?

If your doctor suspects this, he or she may order various tests to check the condition of your veins.

• CT scan (CT - computed tomography scan)
• Doppler ultrasound (Duplex/Doppler ultrasound)
• MRI scan (Magnetic resonance imaging - MRI)
• General Ultrasound
• Venogram - A specialized X-ray examination of the veins.

Additionally, your urine may be tested (urinalysis) to see if there is an elevated protein level (proteinuria) or blood particles in it. These can give you an idea of ​​whether your kidneys are damaged.

How do we keep our renal veins healthy?

Although we cannot exercise the renal veins directly, we can keep them healthy by maintaining our overall health.

• Annual medical checkups: See a doctor at least once a year for a complete checkup. This will help you identify any risk factors for blood clots early.
• Take your prescribed medications exactly as prescribed: If you have been prescribed medications for high blood pressure or to prevent blood clots (anticoagulants/blood thinners), take them exactly as prescribed without skipping any days.
• Exercise: Doing even a simple exercise like walking daily improves blood circulation in the body.
• Drink plenty of water: Drinking the required amount of water per day is very good for the kidneys and blood circulation.
• Healthy diet: Eat a diet rich in fruits and vegetables, low in oil, salt, and sugar.
• Avoid smoking: Smoking is a major cause of damage to blood vessels. So if you smoke, try to quit.

The renal veins are an important part of our body that silently performs a great service. Although we may not think much about them, we can maintain their health by maintaining a healthy lifestyle.

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