​Hi!

Magnetic resonance imaging scans (MRI) done to the mother neither affect
the breast milk nor breastfeeding.
The electromagnetic field and radio waves generated with this technique
does not cause harmful changes in milk composition.
Immediately after this exploration is completed, breastfeeding may be
resumed successfully.
Most radiology scientific societies agree that after an MRI scan is not
necessary to temporarily wean the nursing baby.

The various contrast media that are gadolinium derivatives and used for
explorations with Magnetic Resonance Imaging (MRI) are considered
compatible with breastfeeding because they are quickly eliminated
(elimination half-life of less than 2 hours). They undergo very little
metabolic changes and are virtually non-absorbable orally. They are
structurally very similar to each other. Some have been shown to have no or
minimal excretion into the milk.

Less than 0.04% of the dose given to the mother ends up going into the milk.
Due to its low oral bioavailability, intestinal absorption should be less
than 1% of the dose.
The maximum dose received by the infant is considered less than 0.0004% of
the maternal dose, which is much less than the dose administered to a
newborn infant who undergoes a MRI scan.

Some authors recommend avoiding the use on lactating women of some
Gadolinium contrast media that would pose a high risk for developing
Systemic Nephrogenic Fibrosis, especially in the neonatal period, like
gadoversetamide, and gadodiamide dimeglumine, by using instead low-risk
ones like gadoterate, gadoteridol and gadobutrol.
From
http://e-lactancia.org/breastfeeding/magnetic-resonance-imaging/product/


The contrast agents that are dangerous are RADIOACTIVE ones. And there is a
very easy way to tell if the mother will be reciving one of these: she will
be instructed to keep away from babies and children, from other people, to
use a separate bathroom ​for two to three days...
http://www.snmmi.org/AboutSNMMI/Content.aspx?ItemNumber=5609
This is because the mother herself (and not simply her breastmilk) would be
radioactive. So not only would she not be able to breastfeed, she would
have to be away from her baby (and pump and dump) and all the radioactive
substance is gone from her body.


SO if she has not been instructed to keep away from anyone, it is safe for
her to breastfeed :)

You can check out radioactive isotopes here:
http://e-lactancia.org/breastfeeding/radioactive-isotope-radioisotope-radionuclide-diagnostic-radiopharmaceuticals-atc-v09/group/





-- 
Dra. Carmela Baeza
Médico de Familia
Consultora Certificada en Lactancia Materna IBCLC
www.centroraices.com
http://www.facebook.com/Consulta.Lactancia.Raices
<http://www.facebook.com/pages/Centro-de-Atenci%C3%B3n-a-la-Familia-Ra%C3%ADces/274415189309122>

Autora de "Amar con los Brazos Abiertos"
http://www.ediciones-encuentro.es/libro/amar-con-los-brazos-abiertos.html

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