Toolkit Revision Summary
SUMMARY OF ANTENATAL CORTICOSTEROID THERAPY TOOLKIT CHANGES
Third Edition, released June 2009
Acknowledgements:
- First Edition – Release Date, October 2000
Authors:
- Elliott Main, MD
- Cele Quaintance, RN, MS
- Malaika Stoll, MD
- David Wirtschafter, MD
2. Second Edition - Release Date, July 2001
Authors:
- Elliott Main, MD
- David Wirtschafter, MD
3. Third Edition - Release Date, June 2009
Authors:
- Elliott Main, MD
- Barbara Murphy, RN, MSN
The current NIH consensus statement on antenatal
corticosteroid administration offers a clear rationale for antenatal
corticosteroid use, and is essentially unchanged from the original
consensus statement published in 1994. These guidelines include:
- The benefits of antenatal administration of corticosteroids to
fetuses at risk of preterm delivery vastly outweigh the potential
risks. These benefits include not only a reduction in the risk of RDS
but also a substantial reduction in mortality and IVH.
- All fetuses between 24 and 34 weeks gestation at risk of preterm
delivery should be considered candidates for antenatal treatment with
corticosteroids
- The decision to use antenatal corticosteroids should not be altered
by fetal race or gender or by the availability of surfactant
replacement therapy.
- Patients eligible for therapy with tocolytics should also be considered for treatment with antenatal corticosteroids.
- Treatment consists of two doses of 12 mg of betamethasone given
intramuscularly 24 hours apart or four doses of 6 mg of dexamethasone
given intramuscularly 12 hours apart.
- Because treatment with corticosteroids for less than 24 hours can
be associated with significant reductions in neonatal mortality, RDS
and IVH, antenatal corticosteroids should be given unless immediate
delivery is anticipated.
- In preterm premature rupture of membranes at less than 30 to 32
weeks’ gestation, in the absence of clinical chorioamnionitis,
antenatal corticosteroid use is recommended because of the high risk of
IVH at these early gestational ages.
- In complicated pregnancies where delivery prior to 34 weeks’
gestation is likely, antenatal corticosteroid use is recommended unless
there is evidence that corticosteroids will have an adverse effect on
the mother or delivery is imminent.
Several areas of controversy regarding appropriate
administration of antenatal corticosteroids identified in the first
release of the CPQCC ANS Tool Kit remain, although there has been
ongoing research and significant findings that help guide the clinician.
- As stated in the original ANS Tool Kit, weekly repetitive courses
of antenatal steroids are no longer recommended because of concerns for
fetal head and somatic growth. However, in mothers likely to deliver
beyond 2 weeks from the primary course and before 34 weeks gestation,
research shows that a single “rescue” course of antenatal
corticosteroids appears to provide additional benefit. The same
medication regimens should be utilized.
- In selected situations beyond 34 weeks gestational age with an
indicated delivery (e.g., placenta previa, prior uterine rupture) in
the presence of an immature fetal lung profile, treatment with
antenatal corticosteroids can be effective. The same medication
regimens should be utilized.
- Identification of the safest and most effective steroidal agent has
some controversy. The preferred agents, betamethasone and dexamethasone
are favored over other forms of steroids because they have both been
studied extensively, seem to react in identical fashion and readily
cross the placenta. Either drug is appropriate for antenatal
corticosteroid therapy.
- Antenatal steroids are equally effective in the setting of preterm
rupture of membranes. The upper limit of gestational age for use of
antenatal steroids in this population has some controversy. Some
centers with higher rates of chorioamnionitis limit use to under 32
weeks of gestation while others use antenatal steroids up to the
standard 34-week limit.
The CPQCC benchmark for the appropriate administration of
antenatal corticosteroid therapy is an administration rate of greater
than or equal to 85%.
ANTENATAL CORTICOSTEROID THERAPY TOOLKIT, REVISED 6/09 - Newsletter Article
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