Does anyone know was RI means on an ultrasound scan?

[CathyandHeathcliff]

It says RI = 0.51.

Apparently this is low. I’m 39+2 and was having my final growth scan today.

I believe it’s something to do with blood flowing through the umbilical cord

It's how much blood is flowing through the umbilical cord I think

It’s resistence index - it helps determine the proper functioning of the uterine artery and interface with the placenta. Is considered with other measurements - so don’t panic.

Ok thanks, does anyone know how low 0.51 is at this stage? No one really told me anything after the scan. They seemed in a hurry to get me out.
Also my deepest vertical pool was 3.4cm. Does that seem low?

Here’s what was written:

There are several explanations and it might be better speaking to your GP or midwife to discuss what it means for you personally. It’s not a measure that means much in isolation, I believe.

My understanding of low RI is a link to premature labour- so probably not a huge risk for you.

@CherryPavlova I’m having a c section on Wednesday, so I hope he holds on in there until then!
No one seems majorly concerned so I assume all is fine. They did a quick CTG monitoring after the scan and the Midwife said it was really good.

CTG is a better indicator of the babies health and consequently, of placental health. I don’t think it means you’ll definitely have a premature labour it just has a link in some women. Just try not to sneeze!

It’s nothing to worry about - if it was they’d be bringing your CS forward! “End Diastolic Flow present” means there is plenty of blood getting to the baby.