uWISE Flashcards
CO increase in pregnancy
30-50%, w/50% of that occurring by week 8
mechanism of increased CO in pregnancy
increased stroke volume (first half), increased maternal heart rate (second)
what shunts blood in late pregancy when IVC may be occluded
paravertebral collaterals
CO and MAP in labor
40% increased CO, MAP increased by 10mmHg
normal hyperdynamic PE findings in late pregnancy
increased 2nd heart sound split w/inspiration, distended neck veins, low-grade systolic ejection murmur
total body oxygen consumption increase in preg
20%: 50% to uterus, 30% heart and kidneys, 18% respiratory muscles, rest to mammary tissue
ABG in pregancy
normally show respiratory alkalosis
plasma increase in single gestation
50% (blood volume increases 35% by term
iron needed in preg
60mg qD. (recommended supplement is 27mg) actively transported to fetus, so fetal hemoglobin is normal even if mother is Fe deficienct
clotting factor increase in preg
I, VII, VIII, IX, and X by 50%, rest normal
VTE risk increase in preg
5.5x
WBC in labor
may increase up to 30
trace glucose on dipstick in preg
normal! but proteinuria is concerning
renin and angiotensin increase in preg
renin activity increases 10x, angiotensin by 5x
creatinine and BUN in preg
decrease!
GI changes in preg
lower esophageal sphincter tone (GERD), decreased GI motility, impaired gallbladder contractility: gallstones, cholestatis of bile salts
estrogen on the liver in preg
increases synthesis of fibrinogen, ceruloplasmin, and binding proteins for corticosteroids, sex steroids, thyroid hormone and vit. D
ptyalism
sensation of excess saliva caused by decreased swallowing 2/2 nausea
LFTs in preg
alk phos doubles, cholesterol increases, albumin increases but appears dilutionally lowered
thyroid in early pregnancy
hCG stimulates transient rise in free T4, estrogen increases TBG, leading to lasting elevation of total T3 and T4
carb metabolism in preg
human placental lactogen (hPL) leads to decreased tissue response to insulin, hyperglycemia after meals, and hypoglycemia while fasting
hyperpigmentation of pregancy cause
elevated estrogen and melanocyte-stimulating hormone, cross-react with similarly structured hCG
skin changes in preg
vascular spiders, striae gravidarum, hyperpigmentation, linea nigra, chloasma (mask of pregnancy), eccrine sweating and sebum increase leading to acne
colostrum
thick yellow fluid expressed from breasts in late preg
placenta produces
estrogen, progesterone, hCG, hPL
why HgbF has higer oxygen affinity and saturation than HgbA
more avid 2,30DPG binding
primary source of amniotic fluid by mid second trimester
fetal urine
why neonatal vitamin K is given
fetal livers don’t do much; K prevents hemmorhagic disorders
when does fetus make own T3/T4
24-28 weeks
sex differentiation happens when
testes in week 6 (testosterone and mullerian inhibitory factor), ovaries in week 7 (no hormones, wolffian ducts regress)
passive immunity comes from
maternal IgG
Iron deficiency v. dilutional anemia
Fe deficiency comes w/microcytic anemia
contributes to pulmonary edema in pregnancy
decreased plasma osmolality
other causes of pulmonary edema in preg
tocolytic use, fluid overload, preeclampsia
if PVR exceeds SVR in the setting of VSD
left to right shunting, cyanosis
can cause hydronephrosis in late preg, usually R
right ovarian vein complex dilation
implanted egg w/o DNA, chorionic villi dilate with fluid (grape like), hyperplasia of tropoblastic tissue
molar pregancy, results in spontaneous abortion. check lungs for metastatic disease
wt gain in preg, BMI under 18.5
28-40lb
wt gain in preg, BMI normal
25-35lb
wt gain in preg, BMI over 25, under 30
15-25lb
wt gain in preg, BMI over 30
11-20lb
most common cause of PPH
uterine atony (more than 500cc if vag, 1000 if C)
Sheehan syndrome
AP necrosis from PPH, causing lost of gonadotropin, ACTH and TSH. Tx estrogen, progesterone, thyroid and adrenal hormones
greatest risk for puerperal infection
protracted labor, prolonged rupture of membranes, multiple vaginal examinations, internal fetal monitoring, removal of the placenta manually and low socioeconomic statu
risk of endometritis in vag v C
3% of vaginal, 5-10x higher in C
most common cause of post-partum fever
endometritis (uterine fundal tenderness on PE)
bacteria in PP endometritis
polymicrobial resulting in a mix of aerobes and anaerobes in the genital tract. The most causative agents are Staphylococcus aureus and Streptococcus
PP blues, duration and prevalence
less than two weeks, 40-85%
most telling sign of PP depression
no love for family, indifferent toward infant
breastfeeding duration rec
six months
breast feeding benefits
decreased ovarian cancer, maybe breast cancer, and provides IgA to baby
vaccinations in pre-preg
rubella, varicella, pertussis and hep B. (don’t give attentuated vaccines, like rubella, to pregnant pt)
always test pregnant woman for
HIV
screening by background: african
sickle hemoglobinopathies
screening by background: Mediterranean, SE asian, african
alpha, beta thalassemia
screening by background: ashkenazi, french canadian, cajun
tay-sachs
screening by background: ashkenazi
tay-sachs, faconi anemia, neimann-pick, bloom, gauchier, canavan disease, familial dysautonomia, CF
recommended folic acid
0.4 mg, unless prior NTD pregancy or meds affecting folate, then 4mg)\
bluish vagina
chadwick sign
softening cervix
hegar sign
quickening happens when
16-18 weeks, sometimes as late as 20
standard urine hCG labs detect pregnancy
4 weeks after LMP
serum pregancy tests detect
unique b-subunit of hCG, so don’t count LH, and detect pregnancy sooner
mean doubling time for hCG in normal pregancy
1.5-2 days
doppler detects fetal HR at
12 weeks. fetoscopes at 18-20 weeks
fundal height in cm represents gestational age
when exits pelvis until 36 weeks
Naegele rule
add 7 days to LMP, then subtract three months
normal pregnancy
40 plus or minus two weeks
ultrasound can detect pregnancy
3-4 weeks (transvag) or 5-6weeks from lmp
b-hCG 1,500
should see gestational sac, if not consider ectopic
b-hCG over 4000
should see embryo and fetal heartbeat
antenatal appointment schedule
every 4 weeks for 28 weeks, every two until 36, and weekly after
gestational hypertension
140/90 (either) after 20 weeks w/o proteinuria
normal monthly weight gain
3-4 pounds
normal fetal HR
110-160 bpm
percent of fetuses in cephalic (head-down) position at term
95%
contraindications to external cephalic version
multifetal gestation, fetal compromise, uterine abnormalities, problems of placentation
optimal first ultrasound
18-20w
placenta accreta
chorionic villi attach to myometrium
placenta increta
chorionic villi invade into myometrium
placenta percreta
chorionic villi invade through myometrium and serosa, and sometimes into adjacent organs
first trimester screening (10-13w)
PAPP-A, b-hCG, u/s assessment of nuchal transparency
second trimester screening (15-20w)
triple (MSAFP, estriol, and inhibin), or quadruple (hCG) screening
third trimester screening (24-28w)
glucose challenge (then GTT if abnormal), group b strep at 35w, H/H, antibodie screening repeat in Rh- or HIV pt
big fetus ddx
incorrect age, multiples, macrosomia, hydatidiform mole, polyhydramnios
small fetus ddx
incorrect age, hydatidiform mole, FGR, oligohydramnios, or fetal demise
indications for fetal testing; prexisting
anti-phospholipid, cyanotic heart dz, SLE, renal dz, DM on insulin, HTN
indications for fetal testing: fetal
HTN of preg, decreased movement, oligo/polyhydramnios, growth restriction, postterm, isoimmunization, previous unexplained fetal demise, multiples, monochorionic diaminotic multiple gestation
reactive Nonstress test
2+ accelerations (15 beats above baseline for 15seconds) in 20 minutes. bad is no accelerations in 40minutes
decelerations in contraction stress test
postitive, equivocal, or unsatifcatory, depending on pattern, frequency and strength (high rate of false positives)
biophysical profile components
NST, fetal breathing movements, fetal movement, fetal tone, amniotic fluid at least 2cm
important phospholipids in the surfactant complex
lecithin/sphingomylen (L/S ration), phosphatidylglycerol (marks complete lung maturation at 35w)
RDS signs
grunting, chest retractions, nasal flaring, hypoxia leading to acidosis or death
recovery after delivery
4-6 weeks
exercise while preg
30minutes moderate daily
hot tubs, saunas, supine exercise
no
mineral supplementation while preg
just iron, 27 mg
avoid sex in preg if
placenta previa, premature rupture of membranes, hx or current preterm labor
air travel restrictions in preg
up to 36 weeks, unless poor DM, HTN, or sickle cell (should stay near providers or travel with records), and move every 1-2 hours
birth defect prevalence
2-3%, 5% results of enviromental chemicals or drugs, 15 pharmaceuticals
recommended limit on radiation exposure in preg
5 rad (CT ab/spine has max dx rad at 3.5)
fish restriction
methyl mercury. under 12oz (two servings0 per week, only 6oz albacore tuna
FAS triad
growth restriction, facial abnormalities (short palpebral fissures, low ears, mid-face hypoplasia, smooth philtrum, thin upper lip), CNS dysfunction (microcephaly, intellectual disability, behavior disorders)
tx for constipation of pregancy
docusate, psyllium hydrophlic mucilloid, lubricants
Women with poorly controlled diabetes immediately prior to conception and during organogenesis have a four- to eight-fold risk of having a fetus with a
structural anomaly, most likely CNS or cardiac
highest detection rate for trisomy 21
Sequential screen: (first trimester NT and PAPP-A + second trimester quad screen, 93% Detection Rate)
HPV strains in vaccine
(6,11) 16, 18
nonspecfic tests for syphilis
VDRL, RPR (nontreponemal)
strawberry cervix
trichomoniasis. frothy yellow-green discharge as well. tx:metronidazole, tinidazole
herpes culture sens/spec
highly specific, not sensitive (10-20% false negative rate)
How/where HPV causes cancer
carcinogenesis in the transformation zone of the cervix, where the process of squamous metaplasia replaces columnar with squamous epithelium
ACOG breast cancer screening
annually after 40
screening: first degree relative with colon cancer before 60
begin screening with colonoscopy at age 40, or 10 years before the youngest relative diagnosis, and repeat every five years
DEXA screening
age 65, or sooner with risk: early menopause, glucocorticoid therapy, sedentary lifestyle, alcohol consumption, hyperthyroidism, hyperparathyroidism, anticonvulsant therapy, vitamin D deficiency, family history of early or severe osteoporosis, or chronic liver or renal disease
cause of compensated respiratory alkalosis in pregnancy
increased minute ventilation
causes of acute pilmonary edema in pregnancy
tocolytic use, cardiac disease, fluid overload and preeclampsia
ureter prone to compression by uterus and ovarian veins
right. left is cushioned by sigmoid colon
why total T3 and T4 increase in pregnancy
Thyroid binding globulin (TBG) is increased due to increased circulating estrogens with a concomitant increase in the total thyroxine.
Poorly controlled DM prior to pregnancy most often leads to
cardiac anomolies
Can CVS dx neural tube defects?
No. just dna abnormalities
fragile X prevalence
1 in 3,600 males and 1 in 4,000 to 6,000 female
first trimester ultrasound gives dating within
3-5 days. second: within 1 week third: within 3 weeks
quad screening false positive rate
5%
GTT cutoffs
fasting under 95, one hour under 180, two hour under 155, three hour under 140.
seen with preexisting DM but not gDM
IUGR
When is ibuprofen dangerous in pregnancy?
can close ductus arteriosis after week 32
tx umbilical cord prolapse
attempt to push head back and immeadiate c/s
wide spaced nipples and lymphadema in neonate
turner’s syndrome
Mother w/DM1, moderate glucose control, neonate with
small, hypoglycemic
TTTS effects on donor and recipient
recepient: volume overload, polyhydramnios, polycythemia, hydrops. Donor: IUGR, oligo
neonate, mother with gDM
hypoglycemia, polycythemia, hyperbilirubinemia, hypocalcemia and respiratory distress
in HIV+ mom, start neonate AZT
immeadiately at birth
neonate CPR position
sniffing position (tilting the neonate’s head back and lifting the chin (not flex, as in adult)