3. Pregnancy-OB Flashcards
gravida
number of times pregnant, including current pregnancy
parity
number of deliveries that made it past 20 weeks gestation (completed pregnancies)
- not necessarily a live birth
primigravida
1st pegnancy
multigravida
2 or more pregnancies
grand multigravida
4 or more pregnancies
multiparous
delivered more than one baby
nulliparous
has not give birth previously
twins count as what parity
1
miscarriage/abortion
loss of fetus prior to 20 weeks
stillborn
loss of fetus after 20 weeks
GTPAL
gravida
term births
pre-term births (prior to 37 weeks gestation)
abortions
living
CV changes in pregnancy
decr SVR by 35%
incr BV
incr CO
what decreases SVR
incr progesterone
incr NO
incr prostacyclin
decr NE
incr relaxin
prostacyclin
prostaglandin produces by vascular smooth muscle and endothelium
- stimulates vasodilation
- inhibits platelet aggregation
relaxin
reproductive hormone produced by ovaries and placenta
- loosens everything
what compensates for decr SVR
incr HR
incr BV
what incr plasma volume
incr renin
Hct changes at end of first trimester
decreased due to dilutional anemia
when is cardiac output the highest
3rd stage of labor (80% from pre-labor levels)
structural changes of heart
ventricular hypertrophy (both LV/RV)
dilation
mild valvular insufficiency
preg ECG changes
sinus tachycardia
left axis deviation
incr arrythmias
supine hypotension syndrome
compression of IVC
- severe hypotension
- initial tachycardia then bradycardia
treat supine hypotension
LUD
(wedge under right side)
preg respiratory
decr FRC
incr TV
incr MV
incr PaO2
airway edema = incr difficult airway
do pregnant pts have change in desaturation rates during apnea
more rapid desturation
- incr BMR
- decr FRC
- right shift
coagulation state during pregnancy
hypercoagulable to prevent hemorrhage
what incr coagulation
incr factors
decr protein S
protein C resistance
decr fibrinolysis
LES tone in pregnancy
LES tone decreases
gastric emptying in preg
normal
slow in labor
bile secretions during preg
increased bile secretions
(decr GB motility)
fasting glucose should be ______ compared to pre-pregnancy levels
fasting glucose lower than pre-preg levels
E2 increases levels of
TBG
T3/T4
what happens to the pain threshold in pregnancy
elevated due to progesterone/endorphins
do you need a higher or lower MAC in pregnancy
lower MAC
CSF in pregnancy
decreased
renal BF in pregnancy
increased
BUN/Cr in pregnancy
decreased
LAST symptoms
mental status changes
anxiety
muscle twitches
seizures
bradycardia
arrythmias
hypotension
cardiac arrest
LAST management
100% Fio2
airway management
Intralipid
intralipid dosing
100mL bolus over 2-3 mins
200-250mL infusion over 15-20 min
intralipid max dose
12 mL/kg
common surgeries during pregnancy
ovarian cystectomy
appendectomy
cholecystectomy
breast-biopsy
trauma
cardiac sx during pregnancy mortality
maternal: 3-15%
fetal” 20-35%
pregnancy anesthesia induction changes
faster induction:
incr MV
decr FRC
local anesthetics during pregnancy
increased effect
higher risk of LAST at lower doses
critical organogenesis
first trimester
tetragenic drugs
high dose diazepam
nitrous oxide (extended dose)
volatile anesthetics
sugammadex and pregnancy
avoid routine sugammadex in pregnancy due to progesterone impacts
intrauterine asphyxia causes
inadequate blood flow
inadequate O2 offload
inadequate blood flow causes
maternal hypertension
uterine hypertension
pregnancy BP during surgery
SBP > 100 mmHg
MAP > 65 mmHg
> 80% of baseline
elective surgery
delay until 2-6 weeks postpartum
what trimester is best for surgery
2nd trimester
1st trimester has higher risk of
teratogenicity
3rd trimester has higher risk of
preterm labor
what type of anesthetic minimized fetal exposure
regional