ch 27 OB complications (HTN, endocrine) Flashcards
4 HTN disorders
-gestational HTN
-preeclampsia
-eclampsia
-chronic HTN
maternal consequences of HTN
-hepatic, renal, cardiac dysfunction/failure
-placental abruption
-coagulopathy/DIC
-cerebral hemorrhage
-pulmonary edema
-seizures
-stroke
-death
causes perinatal morbidity relating to HTN
-uteroplacental insufficiency
-premature birth
-death
UPI
uteroplacental insufficiency
Development of hypertension after week 20 of pregnancy in a previously normotensive woman
*without proteinuria or other systemic findings
gestational hypertension
what mmHg is considered HTN
> 140/>90
on 2 separate occasions atleast 4 hours apart
Development of hypertension and proteinuria in a previously normotensive woman after 20 weeks of gestation or in the early postpartum period
*with proteinuria or w/o proteinuria but other complications
preeclampsia
low platelets
thrombocytopenia
other complications with preeclampsia if woman doesn’t have proteinuria
-thrombocytopenia
-renal insufficiency
-impaired liver function
-pulmonary edema
-cerebral/visual symptoms
what are severe features of preeclampsia (7)
-BP >160/>110
-Plt < 100 K
-Impaired liver function
-Renal insufficiency
-Pulmonary edema
-New onset Headache unresponsive to med & not due to alternate dx
-Visual Disturbances
onset of seizure activity or coma in woman with preeclampsia
eclampsia
Hypertension in a pregnant woman present before pregnancy
chronic HTN
when does preeclampsia begin to resolve
after delivery of placenta
what doesn’t happen with woman with preeclampsia concerning spiral arteries
spiral arteries don’t dilate and straighten
less blood flow to placenta
risk of UPI
consequences at the cellular level of preeclampsia
-increased endothelial cell permeability (proteins and fluid go to ECF)
-increased blood concentration (increased RBCs and Hct)
-affects kidneys ability to reabsorb (causing proteinuria)
-nondependent edema (possibility for every organ swells)
-vasospasm
-decreased organ perfusion
-thrombocytopenia (platelet buildup in cells)
-*oliguria
-retinal arteriospasms (visual disturbances)
-DIC (micro-clots everywhere)
preeclampsia:
-what could cause increased RBC/Hct?
-what could cause decreased RBC/Hct?
-increased: increased blood concentration due to fluids going to ECF
-decreased: platelet buildup in cells tears up RBCs
DIC
disseminated intravascular coagulation
(body uses up all of clotting factors to patch up leaky blood vessels)
variant of severe preeclampsia
HELLP syndrome
what is included in HELLP syndrome for preeclampsia
-H: Hemolysis (decreased Hct)
-EL: elevated liver enzymes (hepatic dysfunction)
-LP: low platelets (<100,000)
variant of preeclampsia that may not have increased bp
HELLP syndrome
S+S HELLP syndrome (not labs)
-malaise
-epigastric/RUQ pain
-N/V
Tx HELLP syndrome
magnesium sulfate therapy
high risk factors preeclampsia (6)
-Hx preeclampsia
-multifetal pregnancy
-chronic HTN
-pregestational diabete (T1 or T2)
-renal disease
-autoimmune disease
moderate risk factors preeclampsia (6)
-primigravida
-maternal age >35 yo (previously included <19 yo)
-BMI >30 yo
-family h/o preeclampsia
-socio-demographic characteristics (non-white)
-personal history factors
other risk factors preeclampsia (not included in high risk or moderate) (4)
-gestational diabetes
- preexisting thrombophilia
-assisted reproductive technology (IVF)
-obstructive sleep apnea
subjective (CNS) S+S preeclampsia
-visual disturbances
-headaches
-N/V
subjective (hepatic) S+S preeclampsia
-epigastric
-RUQ pain
subjective (renal) S+S preeclampsia
oliguria
subjective (fetal) S+S preeclampsia
-decreased fetal movement
-unusual/extreme activity
subjective (placental) S+S preeclampsia
-vaginal bleeding
-rigid abdomen
-abdominal pain
objective S+S preeclampsia
-BP
-edema (distribution, degree, pitting)
-DTRs and ankle clonus
-blood (CBC, clotting, liver enzymes, chemistry panel)
-urine (dipstick 2+ protein)
where do you check DTR in woman with epidural
upper extremity
what happens to BUN and creatinine in preeclampsia
increased BUN and creatinine
(decreased renal function)
when do you do a 24 hour urine protein test preeclampsia
2+ protein on dipstick screening
what indicates positive result in 24 hour urine protein test for preeclampsia
-protein >300 mg
-protein creatinine ration >0.3
assessment of fetal status in preeclampsia (4)
-electronic monitoring
-biophysical profile
-serial sonograms (decreased growth, decreasing AFI)
-doppler blood flow
prevention (decrease risk in woman with 1 high or 2 moderate risk factors) preeclampsia
-81 mg/day aspirin
-begin at 12-28 weeks EGA through birth
when is the woman with preeclampsia (w/o severe features) usually induced to deliver
37 weeks
outpatient management for woman <37 EGA with preeclampsia
-home monitoring of BP and symptoms
-daily fetal movement
-1-2x/week: BP, NST, labs, urine protein
-ultrasound to monitor AFI and fetal growth
-activity restrictions
-diet (high protein, salt reduction)
plan of care for woman with preeclampsia w/ severe features at 34 weeks EGA
birth
plan of care for woman with preeclampsia w/ severe features <34 weeks
-corticosteroids
-possible birth
-inpatient care in tertiary care center
-oral antiHTN med
-continuous maternal and fetal assessments
-birth for any indication of worsening condition
corticosteroid given to mom to facilitate fetal lung maturity
betamethasone
(takes atleast 48 hours to reach max benefit)
assessments (and frequency) for woman in expectant management for preeclampsia w/ severe features
-daily assessment for signs of coagulopathy
-q shift: DTR, clonus, breath sounds
-q4h: LOC, BP, HR, RR
-q1h: I&O
-ongoing: vaginal bleeding, signs of abruption
-continuous EFM
-patent IV (16-18G)
-foley
signs of coagulopathy
-petechiae
-bruising
-oozing blood from puncture sites
-labs: platelet, fibrinogen
frequency of assessments during intrapartum for woman with preeclampsia w/ severe features
-q1h: BP and HR
-q1h: DTR, urine protein
-q4h: I&O, breath sounds, headache, visual disturbances, RUQ pain
-labs (renal function, liver enzymes, CBC, clotting studies)
how often is BP checked when magnesium sulfate therapy is started
q15 minutes
nursing interventions to promote safety during intrapartum period for woman with preeclampsia w/ severe features
-decrease stimulation (dark, quiet room)
-emergency meds and suction checked and available (every shift)
-call button in reach
-emergency birth pack checked and available
-maintain total fluid take <125 mL/hr
meds given during intrapartum period for woman with preeclampsia w/ severe features (3)
-magnesium sulfate for seizure prevention
-corticosteroids for fetal lung development
-antiHTN med for bp control
what are anesthesiologists concerned about when placing epidural for woman with preeclampsia w/ severe features during intrapartum
won’t place when platelets under 100k
worried about subdural hematoma
3 reasons for giving magnesium sulfate
-preeclampsia/eclampsia, HELLP
-preterm labor
-fetal neuroprotection (preterm)
how is magnesium sulfate administered
-IVPB through infusion pump
-DEEP IM (alternating buttock)
what is loading dose for mag sulfate IVPB? maintenance dose?
loading: 4-6 g in 100 mL over 15-30 min
maintenance: 1-4 g/hr
what is loading dose for mag sulfate IM? maintenance dose?
loading: 5 G in each buttock
maintenance: 5 G q4h (alternating buttocks)
when would IM injection be used for magnesium sulfate
-no IV access and seizure is imminent/present
-transport to other care center
mag sulfate level for therapeutic range
5-9 mg/dL
mag sulfate level that results in loss of patellar reflex
> 9 mg/dL