What does incidental Circumaortic left renal vein mean?

Circumaortic left renal vein, also known as circumaortic renal collar is an anomaly of left renal vein when a supernumerary or accessory left renal vein passes posterior to the aorta, apart from the normal renal vein passing anterior to the aorta.

Does the left renal vein drain into the IVC?

Renal Veins The left renal vein courses along the posterior abdominal wall, deep into the pancreas and splenic vein, and passes between the proximal superior mesenteric artery and the abdominal aorta before it empties into the inferior vena cava.

Why is IVC filter placed below renal vein?

Most filters are placed in an infrarenal location, because 90% of clinically significant PE originates from the lower extremity or pelvic veins. The inflow of blood from the renal veins will tend to minimize clot formation craniad to an appropriately placed infrarenal IVC filter.

Is Retroaortic left renal vein rare?

A left renal vein passing behind the abdominal aorta is termed a retroaortic left renal vein (RLRV), and this anomaly is a relatively uncommon condition.

What does the left renal vein do?

The renal veins are blood vessels that return blood to the heart from the kidney. Each kidney is drained by its own renal vein (the right and left renal vein). Each renal vein drains into a large vein called the inferior vena cava (IVC), which carries blood directly to the heart.

What organ does the left renal vein drain?

The renal veins are veins that drain the kidney. They connect the kidney to the inferior vena cava. They carry the blood filtered by the kidney….

Renal vein
Drains from kidney
Source interlobar veins
Drains to inferior vena cava
Artery Renal artery

Where are filters placed in a duplicated IVC?

However, placement of filters in the suprarenal IVC, bilateral iliac veins, superior vena cava (SVC), or in both components of a duplicated IVC (Figure 4) has been performed based on the patient’s anatomy and the likely source of PE.

When to use a bilateral iliac vein filter?

Bilateral iliac vein filters are typically used in patients with a megacava (> 28–32 mm) or a duplicated IVC, or in patients with a retroaortic left renal vein component that drains into the IVC close to the iliac venous confluence.

Which is better an IVC or SVC filter?

In these types of cases, the benefits of placing an SVC filter must be weighed against the potential risks. The SVC is much shorter in length than the IVC, and the legs of a conical filter could prolapse into the azygous vein, causing the filter to tilt significantly.

When to suprarenally place an IVC filter?

Suprarenal placement of an IVC filter is performed if there is a duplicated IVC, if there is a large volume of thrombus within the infrarenal IVC or extrinsic compression of the IVC preventing the safe positioning of an infrarenal filter, or if there is extensive renal or gonadal venous thrombosis.