Complications of pregnancy Flashcards
A pregnancy that implants OUTSIDE the uterine cavity
ectopic pregnancy
MC site for ectopic pregnancy?
other places?
ampulla
Can occur in ovary, cervix, abdominal wall
RF ectopic pregnancy
- Prior ectopic pregnancy – scaring in the tube
- STDs
- PID
- Assisted reproductive technology (ART)
- IUD
s/s ectopic pregnancy
- Vaginal bleeding
- Lower abdominal pain
- Adnexal mass
- Tenderness on pelvic exam
- When ectopic is ruptured, patient may be hypotensive, unresponsive, signs of peritoneal irritation
labs of ectopic pregnancy
- β-hCG - Does not double every 48h as it does with a normal IUP
- Discriminatory zone
- Level of β-hCG at which a pregnancy should be seen in the uterus
- 1500-2000mIU/mL (depends on facility) - US - Empty uterus or pseudo-gestational sac (not really a baby)
- heterotopic preg
- adnexal mass/extra uterine preg
what is a Heterotopic pregnancy
IUP and ectopic pregnancy
Particularly worrisome with ART patients
donut sign on US indicates?
pathoneumonic
for ectopic
pregnancy
what specific medication/non-surgical option is for ectopic pregnancy
- methotrexate
ectopic pregnancy med
Folic acid antagonist
Highly effective against rapidly proliferating tissue (ie trophoblasts)
Methotrexate
indications for Methotrexate in ectopic preg tx
- Patient should be: asx, Motivated, Compliant
- Low initial β-hCG (< 5000)
- Small ectopic size (< 3.5cm)
- Absent fetal cardiac activity
- No evidence of intraabdominal bleeding
CI methotrexate in ectopic preg tx
- Sensitivity to MTX
- Evidence of tubal rupture
- Breast feeding
- IUP
- Hepatic, renal or hematologic dysfunction
- Peptic ulcer disease
- Active pulmonary disease
- Evidence of immunodeficiency
before giving methotrexate for ectopic preg, what labs do you need beforehand
CMP, CBC
Monitoring Single Dose Regimen of methotrexate
- Check β-hCG on Day 1 then 4 and 7
- May not decline from Day 1-4 but should decrease by 15% from Day 4-7
- Can consider repeating dose of Methotrexate, if first dose is not effective
what is “Separation pain” when taking methotrexate for ectopic preg
- Increasing abdominal pain beginning a few days after therapy
- Mild and relieved with analgesics
Side Effects: Liver, Stomatitis, Gastroenteritis, Bone Marrow Depression
surgicial management for ectopic preg
- Laparoscopy = preferred surgical tx
- Salpingectomy = tube resection (done more often)
- Salpinostomy = tubal salvage
Salpinostomy or salpingectomy done more often and why?
- salpingectomy
- Salpinostomy - Higher rate of subsequent uterine pregnancy; Higher rate of persistently functioning trophoblast
complete expulsion of all products of conception (POC) before 20 weeks
abortions
s/s of abortion
- History of vaginal bleeding and passage of tissue
- Cervical os closed
- Ultrasound = nothing inside the uterus
tx abortions
- If patient brought POC, send to pathology
- No medical treatment necessary
-
Follow up important if no evidence of POC
- CANNOT rule out ectopic!
partial expulsion of some but not all POC before 20 weeks
incomplete abortion
s/s incomplete abortion
- Vaginal bleeding and abdominal cramping
- POC protruding thru dilated os or active vaginal bleeding
- Ultrasound = nonviable intrauterine pregnancy
tx incomplete abortion
- Curettage
- Prostaglandins
- Expectant management
no expulsion of products, but vaginal bleeding and dilation of the cervix such that a viable pregnancy is unlikely
inevitable abortion
s/s inevitable abortion
- Cervical dilation
- Rupture of membranes or vaginal bleeding
- Ultrasound = intrauterine pregnancy
tx inevitable abortion
- Prostaglandins
- Expectant management
death of the embryo or fetus before 20 weeks with complete retention of all POC
missed abortion
s/s missed abortion
- Closed cervical os
- Absence of uterine growth
- may still pregnant, but no heart beat
- Ultrasound = nonviable intrauterine pregnancy
tx missed abortion
- Curettage
- Prostaglandins
- Expectant Management
any vaginal bleeding before 20 weeks without dilation of the cervix or expulsion of any POC
threatened abortion
s/s threatened abortion
Cervical os closed
Vaginal spotting
Ultrasound = viable intrauterine pregnancy
tx threatened abortion
- Pelvic Rest
- Monitor closely
RhoGAM mechanism of action
Suppresses the immune response and antibody formation of Rh negative individuals to Rh positive red blood cells
Excessively edematous immature placentas
- Villous stromal edema
- Trophoblast proliferation
- Caused by chromosomally abnormal fertilizations
molar pregnancy
RF molar pregnancy
- Age (extremes of reproductive age)- 12-20 or older than 30
- History of prior mole
types of molar pregnancy
- patial
- complete
what is a complete mole
- 46, XX or XY (Diploid)
- Both sets of chromosomes are paternal in origin
- Chromosomes of ovum either absent or inactivated - have subsequent Gestational Trophoblastic Neoplasia
complete mole presentation
- Vaginal bleeding
- Large for date - Soft consistency of uterus
- hCG >100,000
- Theca Lutein Cysts present - from overstimulation of lutein elements by hCG
pathology of complete mole
- No fetal parts
- Edematous villi
what is partial mole
- 69 XXX or XXY occasionally XYY (triploid)
- Two paternal haploid sets of chromosomes and one maternal haploid set
presentation of partial mole
- Missed Abortion
- Small for dates
pathology of partial mole
Fetal parts present
how to dx molar pregnancy
- Serum hCG
- Ultrasound
- Confirmed on pathology!
on an US for a suspected molar pregnancy it shows echogenic uterine mass with numerous anechoic cystic spaces but without fetus or amnionic sac
“Snowstorm” appearance
what type of molar pregnancy
complete
on an US for a suspected molar pregnancy it shows thickened, multicystic placenta along with a fetus or fetal tissue
what type of molar pregnancy
partial mole
common sequelae with molar pregnancy
-
Thyroid storm
- Elevated hCG leads to elevated TSH which elevates fT4
- fT4 normalizes after uterine evacuation - Hyperemesis gravidarum
-
Preeclampsia/Eclampsia
- Rarely seen today d/t early diagnosis and evacuation
preop eval for molar pregnancy
- Thyroid studies
- CBC
- CMP
- CXR – if it were to become cancer (arrhythmias)
- EKG – if it were to become cancer (mets to lung common)
- Type and screen
Suction dilation and curettage management in molar pregnancy
- Pitocin should be given as evacuation is begun – because these patients bleed a lot
- Rhogam given if Rh negative
what is Postevacuation Surveillance
molar pregnancy
VERY IMPORTANT
1. Follow β-hCG levels
- Check 48h postevacuation then check every 1-2 weeks until undetectable
- Then check monthly for at least _6 mo
— If remains undetectable thru the 6 mo period, it is ok to allow pregnancy again
— Should have reliable contraception for this time period
Bleeding that occurs with a viable mature fetus (typically considered >24 weeks)
antepartum bleeding
where can antepartum bleeding come from?
bladder, rectum, or the vagina
MCC of antepartum bleeding
Cervicitis - recent sexual activity
considerations with antepartum bleeding
- where is it coming from
- have they been sexually active recently
- has anything else been in their vagina
- how much bleeding - Clots or active vaginal bleeding Bright red blood or old blood?
Separation of the placenta either partially or totally from its implantation site before delivery
placental abruption
placental abruption can be caused by?
hemorrhage into the decidua
placental abruption can be what 4 types
- complete or partial
- concealed or revealed
what is chronic abruption
placental abruption beginnly early in pregnancy
Close monitoring throughout pregnancy
RF placental abruption
- Trauma
- Increasing maternal age
- Hypertension/Preeclampsia - Most frequent condition associated with abruption
- Preterm premature ruptured membranes
- Cigarette smoking
- Cocaine
- Lupus anticoagulant and thrombophilias
- Uterine fibroids
- Recurrent abrutpion
clinical findings of placental abruption
- Sudden onset abdominal pain
- Vaginal bleeding
- Uterine tenderness
dx placental abruption
Diagnosis of Exclusion
US
* Limited use because negative findings do NOT exclude abruption
compliations of placental abruption
- Hypovolemic shock – will need to be delivered ASAP
- Consumptive coagulopathy (or DIC)
- Acute kidney injury
- Couvelaire Uterus
cause and tx for Hypovolemic shock in abruption complication
- Due to maternal blood loss
- Can develop with a concealed or revealed abruption
- Requires prompt tx with crystalloid and blood infusion
- will need to be delivered ASAP
____ is the most common obstetric cause of DIC
Abruption
Intravascular activation of clotting
cause and tx of AKI in placental abruption
- Hypovolemia leads to inadequate renal perfusion and oliguira
- Can be prevented with tx of hypovolemia
Wide spread extravasation of blood into the uterine musculature and beneath the serosa
gives myometrium a bluish-purple tone
Couvelaire Uterus
placental abruption complication
management placental abruption
- Varies depending on clinical condition, gestational age and associated hemorrhage
- Cesarean delivery vs Vaginal delivery
- C section - quicker; but risk of consumptive coagulopathy = increased bleeding should be considered
- If deceased fetus = vaginal delivery preferred - Expectant management
- Should be considered with premature fetus
A placenta that is implanted somewhere in the lower uterine segment, either over or very near the internal cervical os
palcenta previa
classifications for placenta previa
Placenta previa: Internal os is covered partially or completely by placenta
Low-lying placenta: Implantation in lower uterine segment is such that placental edge does not reach internal os and remains outside a 2cm wide perimeter around the os
RF placent previa
- Increasing maternal age
- Increasing parity
- Prior cesarean delivery
- Cigarette smoking
- Elevated MSAFP
clinical feature of placental previa and why does it happen
Painless vaginal bleeding - Usually seen after 2nd trimester
- Uterine body is remodeling to form the lower uterine segment
- Internal os dilates and some of the placenta inevitably separates
- Bleeding occurs and myometrium is unable to contract to stop
how to dx placenta previa
Transvaginal ultrasound
Previa should be excluded in any patient who presents with ?
vaginal bleeding after 2nd trimester
what exam should not be performed until previa is r/o?
digital exam - can cause severe hemorrhage
what is placenta migration
- Used to describe the apparent movement of the placenta away from the internal os
- Differential growth of the lower and upper uterine segments as pregnancy progresses
- Greater upper uterine blood flow leads to placental growth towards the fundus
low lying placenta is MC to persist if pt has h/o?
prior cesarean or hysterotomy scar
Until ? weeks, likelihood of previa persistence is low
23
If previa present after 23 weeks, >50% chance will persist
management placenta previa
Must consider fetal maturity, labor and amount of bleeding
- Preterm fetus
- No persistent active vaginal bleeding = Observe; Outpatient vs inpatient management
- Persistent active vaginal bleeding = Delivery - Term fetus
- Deliver by C-section
- Abnormally implanted, invasive or adhered placenta
- Abnormally firm adherence to myometrium because of partial or total absence of the decidua basalis and imperfect development of the fibrinoid layer
placenta accrete syndromes
Villi attached to myometrium
which placenta accrete syndrome
Placenta Accreta
Villi invade myometrium
which placenta accrete syndrome
Placenta Increta
Villi penetrate through the myometrium and to or through the serosa
which placenta accrete syndrome
Placenta Percreta
placenta accrete syndromes increases in incidiences due to ?
increasing number of cesarean deliveries performed
RF placenta accrete syndromes
- Associated Placenta Previa
- Prior Cesarean Delivery - Decidual formation can be defective over prior scar
presentation placenta accrete synromes
asx, picked up on US
dx placenta accrete syndromes
- US - specificity using transvaginal US; MRI may be useful adjunct
- Delivery
- Pathology - Confirms dx and extent of invasion
management placenta accrete syndromes
-
Planned delivery at tertiary center - Recommended around 34-36 weeks
- To avoid emergency cesarean delivery - Risk of hysterectomy should be discussed with pt
- Preop uterine artery embolization - reduce bleeding
-
Consider leaving placenta in situ
- Placenta can reabsorb
- Subsequent hysterectomy can be scheduled when blood loss may be lessened
what is cervical insufficiency
- Painless cervical dilatation in the second trimester
- Followed by prolapsing and ballooning of membranes into the vagina and ultimately expulsion of an immature fetus
RF cervical insufficiency
- Prior cervical trauma
- Dilation and curettage
- Conization
- Cauterization of the cervix - DES exposure
diagnostics for cervical insufficiency
- Ultrasound - Confirm living fetus
- Cervical swabs for infection