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Renal Vein Stenosis

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This is a picture of the rail transplant of rising creatinine.

0:03

And so we're asked to evaluate it initially if some

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images of the bladder followed by the kidney itself. Grayscale. Imaging

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is significant. I suppose for a little bit of hydronephrosis. This

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with a rounded calluses is a little bit more than you'd

0:15

expect.

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We don't see any collections or masses associated with the kidney.

0:19

We're seeing flow throughout the transplanted, kidney.

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But that's not sort of the finding. I want to share with you. You know,

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we can look at certainly the Enterprise vessels you

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all have nice resistive indices. So we're not

0:31

too worried about flow within the renal transplanted kidney itself.

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However, in this instance, the renal vein is

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a little bit interesting in that you could already see on the color Imaging this

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this flow going away from the renal transplant towards the

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external iliac vein relatively normal and then a little

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bit more turbulent flow over here. So maybe there's something going on

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in this location. We start interrogating those regions. We can

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see here an acceptable velocity of about 24

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centimeters per second here about 24. So in

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good shape while we get to that area of turbulent flow.

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We jump all the way up to 273.

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And so that is extremely extremely high over there.

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Here we're interrogating the main renal artery

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and now we're back valuing the venous system the

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venous system and the external pain is about 43 and so

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really anastomosis is about 211. So

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a little bit elevated there, but really as we're in sort

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of the mid portion to an astimosis portion of that renal

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vein, the velocities are very very high. And so, you know,

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the only way one could sort

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of interpret it based on the Imaging is that there are some degree of greenal veins

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stenosis. Now, it does turn out that renal means

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stenosis is very very rare. So I would caution anyone to make that

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diagnosis you can sometimes see if there's external compression

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and perhaps the kidney is placed in

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such a way in the pelvis. It's that there's some kinking of

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that renal vein and there's no sort of set Imaging criteria

1:56

that are established to diagnose this

1:59

you surely just have to look at the renal vein. Look for narrowing

2:02

on grayscale Imaging look for

2:04

Quite a jump of elevated velocities which in

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this case goes from about 20 to 270 and

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that could suggest that there are some degree renal veins

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stenosis this in fact resolved in this patient.

2:16

We didn't really know why this was so elevated perhaps at

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the time. It was image the kidney was placed in a

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certain way that allowed this area to be kinked a little bit resulting in

2:25

elevative velocities, but this had resolved upon subsequent ultrasounds.

Report

Faculty

Mahan Mathur, MD

Associate Professor, Division of Body Imaging; Vice Chair of Education, Dept of Radiology and Biomedical Imaging

Yale School of Medicine

Tags

Vascular

Ultrasound

Kidneys

Idiopathic

Iatrogenic

Genitourinary (GU)

Body