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| http://www.infantrisk.com/content/radiological-procedures-pregnancy |
ACOG has
issued recommendations addressing the concerns surrounding the use of X-ray, sonography,
nuclear medicine, CT and MRI in pregnancy and lactation. The committee opinion
was published in October issue of Journal Obstetrics and Gynecology.
These
investigative modalities have become an integral part of our diagnostic armamentarium
for evaluating acute and chronic conditions. However, there is confusion and
fear surrounding these tests among physician and patients alike that many times
they are delayed or totally avoided. Many a times breast feeding is stopped while
patient undergo these investigations.
The ACOG’s
committee on obstetric practice make the following recommendations:
Ultrasonography
and MRI are safe and are the imaging modalities of choice in pregnancy and lactation,
although they should be availed only when they are expected to answer a
relevant clinical dilemma or are provide health benefit to the patient.
Routine radiography,
computed tomography (CT) scan, or nuclear medicine imaging techniques exposes
the pregnant women to a dose that is much lower than what is associated with
fetal harm and so these techniques should be used if deemed necessary in
addition to USG or MRI or alone if they answer the relevant clinical question.
The use of gadolinium
contrast with MRI is not advised in routine practice and should only be used as
contrast if it significantly improve the diagnosis and maternal and fetal
outcome during pregnancy.
Breastfeeding
need not be interrupted after gadolinium administration.
Nuclear
Medicine imaging should be limited to the use of technetium 99m at 5 mGy when
indicated during pregnancy.
Radioactive iodine (iodine 131) readily crosses
placenta and is absolutely contraindicated in pregnancy.
