OB/Gyn Flashcards
external cephalic version can be performed at __ weeks
> =37 weeks
to decrease risk of prematurity if complication occurs (eg contractions, fetal distress, premature rupture of membranes- all would require immediate delivery)
contraindications to external cephalic version
Contraindications to vaginal delivery
- previous classical cesarean delivery
- extensive myomectomy (fibroid removal)
- placenta previa
These patients will undergo Cesarean at 37 weeks
choriocarcinoma most commonly metastasizes to the __
lungs
presentation of choriocarcinoma
- amenorrhea or abnormal uterine bleeding
- pelvic pain/pressure
- sxs from mets (lung, vagina)
- uterine mass
diagnosis of choriocarcinoma is confirmed by __
elevated b-hCG level
treatment for postpartum endometritis
clindamycin + gentamicin
clinical features of acute fatty liver of pregnancy
n/v
RUQ/epigastric pain
fulminant liver failure
lab findings of acute fatty liver of pregnancy
- profound hypoglycemia (liver can’t convert glycogen to glucose)
- elevated aminotrnsferases (2-3x normal)
- elev bilirubin
- thrombocytopenia (dt fulminant liver failure)
- possible DIC
management of acute fatty liver of pregnancy
immediate delivery
when is it considered preterm prelabor rupture of membranes
<37 weeks
risk factors for preterm prelabor rupture of membranes
anything that distends or weakens the membranes
- polyhydramnions
- GU infection
- antepartum bleeding
management of uncomplicated preterm prelabor rupture of membranes <34 weeks
inpatient expectant management with:
-prophylactic latency antibiotics (to prevent intraamniotic infection thereby increasing time between rupture and delivery)
- corticosteroids eg betamethasone (decr risk of neonatal respiratory distress syndrome)
- fetal surveillance (nonstress tests, fetal growth ultrasounds)
- tocolysis contraindicated as contraction often indicate complication that requires delivery or intervention
magnesium sulfate needed for preterm deliveries __ weeks and why?
<32 weeks if imminent delivery
fetal neuroprotection - reduce risk of cerebral palsy
time of onset postpartum blues vs depression vs psychossi
blues- 2-3 days (resolves within 2 weeks)
depression- within 4-6 weeks (can be up to 1 year)
psychosis - days to weeks
risk factors amniotic fluid embolism
advanced maternal age gravida >=5 cesarean or instrumental delivery placenta previa or abruption preeclampsia
2 main causes of cutaneous SCC
HPV infection
frequent sun exposure
Mammary paget disease is associated w what condition
adenocarcinoma
appearance of mammary paget disease
persistent, eczematous and/or ulcerating rash at nipple and spreads to areola
pain, itching, burning, no relief with corticosteroids
why might pt with von willebrand disease have normal PTT?
- mild to moderate vwf deficiency, may have enough factor 8 to maintain PTT levels
- stress or inflammation; vWF and factor 8 are acute phase reactants
- (pregnancy, OCP), thyroid hormone replacement increase vWF synthesis
how is the first stage of labor divided?
latent (0-6cm)
active (>=6-10cm)
normal labor progression in active phase
cervix dilates at least 1cm per hour
when is cesearean delivery needed during labor?
active labor arrest- no cervical change for 4 or more hours with adequate contractions / 6 hours or more with inadequate contractions; or category III Fetal heart tracing
when is an intrauterine pressure catheter placed?
when labor hasn’t completely arrested but cervical change slows to <1cm/2 hr (labor protraction)
if inadequate contractions, labor is augmented with oxytocin to incr contraction frequency and force
definition uterine tachysystole
> 5 contractions every 10 minutes
criteria of gestational hypertension (as opposed to chronic htn)
systolic pressure >= 140 or diastolic >=90 prior to conception OR 20 weeks
no proteinuria or end organ damage (otherwise preeclampsia)
maternal complications/risks of HTN
- superimposed preeclampsia
- postpartum hemorrhage
- gest diabetes
- abruptio placentae
- cesarean delivery
fetal risks when mom has HTN
- fetal growth restriction
- perinatal mortality
- preterm delivery
- oligohydramnios
fetal bradycardia rate? tachycardia?
<110 brady
>160 tachy
causes of fetal tachycardia
(>160)
- maternal fever
- med side effect (eg beta agonists)
- fetal hyperthyroidism
- fetal tachyarrythmia
causes of fetal bradycardia
- maternal hypothermia
- med side effect (eg beta blockers)
- fetal hypothyroid
- fetal heart block (eg anti Ro/SSA, anti-La/SSB)
signs and symptoms of chorioamnionitis/intraamniotic infection
- maternal fever >= 39C without another clear cause
- leukocytosis >15
- and/or purulent amniotic fluid
risk of developing IAI increases as labor progresses and after membrane rupture
complex ovarian cyst with calcified and hyperechoic areas
mature cystic teratoma (dermoid cyst)
explain hydrops fetalis in alpha thalassemia major
fetus makes hemoglobin barts (4 gamma chains) which have extremely high O2 affinity, doesn’t release O2 to tissues –> severe fetal hypoxrmia –> high output heart failure –> hydrops fetalis (eg skin edema, ascities) and fetal demise
friable cervix, yellow discharge in young female
most likely microscopic finding?
n gonorrhea or
chlamydia
no organisms (both are intracellular)
initial workup of recurrent pregnancy loss
- pelvic u/s
- karyotype
- thrombophilia testing
what is placenta previa
placenta covers the cervix
risk factors placenta previa
- previous placenta previa
- prior c-section
- multi gestation
how does placenta previa present
painLESS vaginal bleeding >20 weeks gestation
(eg nontender uterus, painless ireggular contractions)
*note bleeding is mostly maternal origin so many pts have reassuring fetal monitoring initially
management placenta previa
- no sex
- no digital cervical exam
- inpatient admission for bleeding episodes
most previas resolved by 3rd trimester
if persistent previa, undergo c-section at 36-37 weeks (prior to onset of labor)
what is placental abruption, how does it present?
(separation of placenta from uterus prior to fetal delivery
- vaginal bleeding
- uterine contractions
- constain abdominal PAIN
- fetal decels
definition preterm labor
cervical dilation 3cm or more, or effacement (length <2cm) with regular painful contractions at <37 weeks
pathognomonic finding ovarian torsion
lack of doppler flow
indications for giving anti-D immunoglobulin for Rh(D) negative patients
- at 28-32 weeks gestation
- within 72h of delivering Rh+ baby
- within 72h after spontaneous abortion
- ectopic preg
- threattened abortion
- hydatidiform mole
- chorionic villous sampling, amniocentesis
- abdominal trauma
- 2nd and 3rd trimester bleeding
- external cephalic version
**not indicated if dad is Rh-
GBS rectovaginal screening should be performed at __ weeks
35-37 weeks
results valid for about 5 weeks
definition of short interpregnancy interval
<18 months from delivery to next pregnancy
complications of short interpregnancy interval
- maternal anemia
- PPROM
- preterm delivery
- LBW
what causes painful genital ulcers
HSV, h ducreyi
what causes painLESS genital ulcers?
treponema pallidum
chlamydia trachomatis
common side effect of tamoxifen
hot flashes
theorized due to antiestrogenic activity in CNS which causes thermoregulatory dysfunction in the anterior hypothalamus
how to estrogen agonists increase risk of venous thromboemoblism
they increase protein C resistance
why are pregnant women at higher risk of pyelonephritis
progesterone-related smooth muscle relaxation causes ureteral dilation
–> allows bacteria to ascend readily to upper urinary tract
*one third of pts with asx bacteriuria do no completely eradicate the bacteria so repeat ucx required
next step for 21yo woman who has atypical squamous cells of undetermined significant, reflex HPV positive for high risk HPV
-repeat cytology in 12 months
21-24 is special age grp bc HPV so prevalent
if ASC-US persists for 2 years in age 21-24, would then do colposcopy
(if ASC-US in age >24 would do colposcopy)
guidelines cervical ca screening women age 30-64
- cotesting with cytology and HPV every 5 years
- 0r cytology alone every 3 years
which patients with ASC-US should get reflex HPV testing
recommended in patients >30
when should elective C-section be scheduled
at least 39 weeks (dt risk prematurity)
ACOG mammogram guidelines
offer screening mammo to women 40 and up annually
explain causes of R hydronephrosis in pregnancy
- compression by uterus which is rotated right
- right ovarian vein lies over right ureter
next step if pt has gestational trophoblastic disease
CXR
mets most commonly to lung
pregnancy weight gain guidelines
- underweight- gain 28-40
- normal- gain 25-35
- overweight- 15-25
- obese - 11-20
do you expect IUGR in pre-existing DM or gestational DM?
pre-existing
mcc elevated maternal serum AFP
other causes
most common: underestimation of gestational age
- twin gestation
- NTD
- abdominal wall defects
- pilonidal cysts
- cystic hydroma
- sacrococcygeal teratoma
ibuprofen is safe to take until ___. why?
32 weeks
premature closure of ductus arteriosus
what blood thinner is contraindicated in pregnancy
warfarin
Quad screen
- components
- when done
- who offered to
normal risk women in 2nd trimester (16-20 weeks)
AFP
hCG
unconjug estriol
inhibin
Cell free DNA (or NIPT screening) offered to who
when can it be done
women at increased risk for fetal aneuploidy
as early as 9 weeks and onward
risks of gestational DM
macrosomia, shoulder dystocia
metabolic disturbances
preeclampsia
polyhydramnios
most likely cause of variable decels
cord compression
what is a cause of early decels
head compression
features of twin twin transfusion syndrome
recipient baby
- plethoric
- polycythemic
- may get HF and hydrops from volume overload and poly
donor baby
- small
- anemic
- IUGR and oligo
protocol for baby born to HIV+ mom who has been treated
start AZT (zidovudine) immediately
APGAR components
HR RR Reflex Activity Color
safest method to suppress lactation
-breast binding, ice packs, analgesia. avoid breast stim
breastfeeding is a/w decreased risk of __
ovarian cancer
what hormonal changes occur right after delivery to allow milk prod?
rapid huge decrease in estrogen and progesterone -> progesterone no longer inhibiting alpha-lactalbumin by RER
progesterone withdrawal allows PRL to act unopposed in stimulating alpha-lactalbumin production
incr alpha-lactalbumin stimulates lactose synthase
signs that baby is getting enough milk
3-4 stools in 24h
6 wet diapers in 24h
weight gain
sounds of swallowing
strategy to increase milk supply and how it works
increase suckling - increases supply of oxytocin, which is responsible for milk ejection
(prolactin increases production)
treatment of nipple candidiasis
- topical clotrimazole or miconazole
- topical abx for often concurrent nipple fissures- triple antibiotic or mupirocin
- can rx topical steroid to facilitate healing or cases where nipples are very red and inflamed
-treat baby with oral nystatin, followed by oral flucon
what can 10-day medroxyprogesterone test tell you
can confirm low estrogen levels
presence of estrogen causes endometrial proliferation, which should shed when progesterone is withdrawn
pts without adequate estrogen will have min to no bleeding bc no lining to shed
what type of contraception is contraindicated in pt with migraine with aura
estrogen containing
incr risk stroke
untreated asx bacteriuria in pregnancy increases risk of
acute pyelo
cause of chancroid and what does it look like
H ducreyi
multiple deep painful ulcers
base may have gray to yellow exudate
risk factors for uterine inversion
things that overdistend the uterus
- macrosomia
- grand multiparity
- mult gestation
- polyhydramnios
- fast delivery
- placenta accreta
-iatrogenic- too much traction on umbilical cord when delivering placenta
management of uterine inversion
- immediate manual replacement (delay-uterus can swell and cervix can contract around it)
- uterine relaxants (eg nitroglycerine, terbutaline) to assist replacement if unsuccessful. prefer not to use bc can worsen uterine atony after replacement
- uterotonics only after uterus replaced
expected fetal tracings in placenta previa vs vasa previa
- normal fetal tracings in placenta previa early on as it’s mostly maternal blood loss
- rapid deterioration of fetal tracing in vasa previa as bleeding is mostly fetal origin
presentation of placenta previa
-painless vaginal bleeding after 20 weeks
dx and management of placenta previa
- dx: transabdominal, then transvaginal u/s
- management: no intercourse, no digital cervical exam; admission for bleeding episodes
how to evaluate risk for preterm labor
transvaginal u/s of cervical length
short cervix is strong predictor of ptl
definition short cervix
2cm or less without history of ptl
2.5cm or less with history of ptl
prevention of preterm birth, no h/o preterm labor
get TVUS cervical length, if short, give vaginal progesterone
prevention of preterm birth, yes h/o preterm labor
give IM progesterone
get TVUS cervical length, if normal get serial CL until 24
if short, do cerclage and serial CL until 24w
how does progesterone help prevent preterm labor
it maintains uterine quiescence and protects amniotic membranes against premature rupture
hematometra- what is it and cause
collection or retention of blood in uterus
caused by imperforate hymen or vaginal septum
fragile X genetics
GCC trinucleotide repeat
purpose of fetal fibronectin
what is it?
negative predictor of preterm delivery
fibronectin is an extracellular matrix protein that acts as adhesive of fetal membranes to decidua; presence in cervical mucous indicates disruption or injury to mat-fetal interface
testing indicated for recurrent first trimester losses
- lupus anticoagulant
- anticardiolipin antibodies
- DM
- thyroid disease
- uterine imaging to exclude septum or anomaly (hysterscopy or hysterography)
options to decrease risk perinatal transmission HIV
- IV zidovudine at time of delivery
- zidovudine to neonate
C-section before labor for viral load >1000
treatment for symptomatic MVP
beta blockers
risk factors for preeclampsia
- advanced maternal age
- nulliparity
- multip gestation
- obesity
- preexisiting med conditions (lupus, chronic HTN, DM)
complications in obesity and pregnancy
- chronic htn
- gestational dm
- preeclampsia
- macrosomia
- higher rates c-section and postpartum complic
what antidepressant should NOT be used in pregnancy
parocetine- class D, fetal cardiac malf and persistent pulm htn
therapeutic magnesium level for preeclampsia
4-7
loss of DTRs occurs at Mg __
7-10
respiratory depression occurs at Mg __
12-15
cardiac arrest occurs at Mg __
15
contraindications to expectant management of severe preeclampsia remote from term
- thrombocytopenia
- can’t control BP with max doses of 2 antihypertensives
- nonreassuring fetal tracings
- LFTs elev more than 2x normal
- eclampsia
- persistent CNS sxs
- oliguria
how much fetal blood is neutralized by 300mcg of rhogam?
30cc
signs of fetal hydrops
develops in presence of decr hepatic protein production
defined as collection of fluid in body cavities
- pericardial or pleural effusion
- placentomegaly (edema)
- polyhydramnios
- hepatosplenomegaly if extramedullary hematopoeisis is extensive
definition prolonged latent phase of labor
how to treat
> 20h for nulliparas
14h for multiparas
rest or augment labor
when should PID be treated in patient
severe, n/v, or pregnant
inpatient regimen for PID
IV cefoxitin and doxy
alternative: clindamycin and gentamicin
outpatient regimen for PID and what do these meds cover
ceftriaxone (gonorrhea and some gm neg)
doxycycline (chlamydia)
metronidazole (anaerobes, mycoplasma)
retraction of fetal head is classic presentation of __
shoulder dystocia
do mcrobert’s maneuver
management of IUGR
twice weekly non-stress test
AFI at least once a week
fetal growth restriction baby will be at risk for
- chronic diseases such as cardiovascular disease, htn, stroke, copd, t2dm, obesity
- cognitive delay in childhood
non stress test is based on what principle
that when fetus moves heart acelerates
fetal growth restriction is fetal weight less than __ percentile
10th
causes of prolonged periods fetal tachycardia
- maternal fever
- chorioamnionitis
when might amnioinfusion be used
repeated variable decels
how does head compression cause early decels
vagal nerve stim -> hr slows
uterine hyperstimulation can cause what fetal change
prolonged bradycardia
initial measures to evaluate and treat fetal hypoperfusion/occasional late decels
- left lateral position (increases perfusion to uterus)
- maternal O2
- stop oxytocin
- intrauterine resuscitation with tocolytics and IVF
most important source of lubrication in arousal phase
vaginal transudate
treatment for vaginismus
therapy with vaginal dilators
cause of intrahepatic cholestasis of pregnancy? treatment?
retain bile salt, which is deposited in dermis causing itching
initially- emollients and antihistamines
ursodeoxycholic acid- relieves itching and lowers serum enzyme levels
risk congenital varicella lowest in __ trimester
1st
what contraceptive decreases risk ovarian cancer
oral contraceptives
what contraceptive decr risk endometrial cancer
progesterone IUDs
oral levornogestrol (plan B) should be taken within __ (time) of intercourse
how does it work
72h
progesterone incr delays LH surge (thus delays ovulation)
copper IUD can be placed up to __ (time) after sex for emergency contraception
5 days
most freq cause of preterm labor
idiopathic
dehydration, uterine distortion (eg from fibroids) can be associated with ptl