Lecture 8 Perinatal loss Flashcards
An Rh-negative woman receiving an abortion is a candidate for _
Prophylaxis against Rh isoimmunization. She should receive RhoGAM (Rhₒ(D) immune globulin) within 72 hours after the abortion if she is D negative and if Coombs’ test results are negative (if the woman is unsensitized or isoimmunization has not developed).
Methotrexate
- A cytotoxic drug that causes early abortion by blocking folic acid in fetal cells so that they cannot divide.
- Medical abortion - given IM or PO (usually mixed with orange juice). Followed with misoprostol after 3-7 days.
- Ectopic pregnancy - given IM - first-line non-surgical intervention for unruptured ectopic pregnancies. Requires weekly testing of hCG levels to verify that the pregnancy has resolved (2-3 weeks).
- Side effects - GI distress, N/V, stomatitis, dizziness.
- Woman should not take any analgesic stronger than Tylenol because it can mask the symptoms of tubal rupture.
Misoprostol (Cytotec)
- A prostaglandin analog that acts directly on the cervix to soften and dilate and on the uterine muscle to stimulate contractions.
- Placed vaginally after administration of methotrexate; taken orally after administration of mifepristone.
Mifepristone (RU 486)
- Binds to progesterone receptors and blocks the action of progesterone, which is necessary for maintaining pregnancy.
- 600 mg given orally up to 7 weeks after the last menstrual period. Followed with 400 mcg of misoprostol after 48 hours.
When preterm birth appears inevitable _ may be administered to reduce or prevent neonatal neurologic morbidity (e.g., cerebral palsy).
Magnesium sulfate.
[Current recommendations are that magnesium sulfate for neuroprotection is given to women who are at least 24 but less than 32 weeks of gestation at the time birth is expected to occur.]
Labor that progressed to a cervical dilation of _ or more is likely to lead to inevitable preterm birth.
4 cm.
What drug is given to reverse the effects of respiratory depression caused by magnesium sulfate?
Calcium gluconate.
Threatened miscarriage
Symptoms: Spotting of blood but with the cervical os closed. Mild uterine cramping may be present.
Only type of miscarriage that cannot lead to infection.
Inevitable miscarriage
Symptoms: Moderate to heavy bleeding, with or without tissue, with an open cervical os. Mild to severe uterine cramping. Accompanied by ROM and cervical dilation, but the fetus has yet to be expelled.
Incomplete miscarriage
Symptoms: Moderate to heavy bleeding, with or without tissue, with an open cervical os. Mild to severe uterine cramping. The fetus is expelled but the placenta is retained.
Complete miscarriage
The cervix has already closed after all fetal tissue was expelled. Slight bleeding may occur and mild uterine cramping may be present.
Missed miscarriage
A pregnancy in which the fetus has died but the products of conception are retained in utero for up to several weeks. The cervical os remains closed; uterine cramping and bleeding may be absent.
Failure to evacuate the products of conception can lead to DIC.
A missed miscarriage can be managed with medications such as _ which are usually effective in completing the miscarriage within 7 days.
Prostaglandins, e.g., misoprostol (Cytotec).
Cerclage
The placement of a surgical suture around the cervix beneath the mucosa to constrict the internal os. The suture is removed at 36 weeks.
Indications: 3 or more early preterm births or second-trimester losses, a short (less than 25 mm) cervical length, and an open cervix found on digital or speculum examination.
“Expectant management” refers to _
Observation and bed rest (“watchful waiting”).