preeclampsia / pregnancy induced hypertension. incidence preeclampsia complicates at least 10% of...
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PREECLAMPSIA / PREGNANCY
INDUCED HYPERTENSION
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Incidence
Preeclampsia complicates at least 10% of first pregnancies
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Etiology
The etiology of preeclampsia is unknown but may be related to abnormal placentation.
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Pathophysiology
Preeclampsia most commonly presents in the second half of pregnancy.
It is a multisystem disease associated with diffuse vasospasm and endothelial damage.
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Pathophysiology
Pathology demonstrates areas of endothelial swelling, edema, micro-infarctions and micro-hemorrhages in effected organs.
The main target organs are the brain, kidney, liver, lungs, and heart.
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Risk Factors
• first pregnancy
• new matings
• younger than 18 and older than 35
• prior history
• family history
• multiple gestations
• hydatidiform mole
• hydrops
• triploidy
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Risk Factors
• chronic hypertension
• diabetes
• renal disease
• SLE
• thrombophilias (especially APLA)
• obesity
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Diagnosis
Though important manifestations of the disease, hypertension, proteinuria, and edema are not essential to the diagnosis of preeclampsia.
The likelihood of preeclampsia increases when more elements of the disease are present.
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Symptoms
• headache
• visual disturbances
• epigastric or RUQ discomfort
• edema/ rapid weight gain
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Signs
• hypertension
• retinal vasospasm
• hepatic tenderness
• facial and hand edema
• clonus
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Laboratory Manifestations
• proteinuria
• elevated creatinine
• elevated uric acid
• elevated liver enzymes
• elevated hemoglobin
• thrombocytopenia
• elevated PT and PTT
• microangiopathic hemolytic anemia
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Life Threatening Manifestations
• seizures
• cerebral hemorrhage
• renal failure
• hepatic failure
• liver hematoma with hepatic rupture
• DIC
• pulmonary edema
• ventricular dysfunction
• placental abruption
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Fetal Effects
Preeclampsia has significant adverse fetal effects including decreased amniotic fluid levels, decreased fetal growth, placental abruption, and intrauterine fetal demise.
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Treatment
When pre-eclampsia is diagnosed, it is always in the mother’s interest to deliver her baby; therefore, any delay in delivery must be because of uncertainty about the diagnosis or immaturity of the fetus.
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Treatment
The use of an anticonvulsant to prevent seizures should be considered. Magnesium sulfate is most commonly used.
Keep blood pressure below 180 systolic and 110 diastolic.
Minimize fluids.
Monitor patient and labs closely as status can deteriorate rapidly.
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Treatment
The patient with Preeclampsia can worsen or even initially present postpartum.