Repro Flashcards
Epidemiology of Preeclampsia
Increased incidence with: - multiple gestations - Chronic HTN - Previous history of preeclampsia - Renal disease - DM Prior to 20 weeks, preeclampsia pathognomonic for molar pregnancy
Pathophysiology of preeclampsia
Abberation in normal interaction between fetal allograft and maternal tissue
Vascular Changes: normal migration of trophoblast into uterus with spiral arterioles causes uteroplacental arteral bed into low resistance, high flow system
Preeclampsia= defective vascular changes–> decreased blood supply, fibrotic vascular changes, endothelial injury
- see vasospasm, coagulation system activation, abnormal hemostasis–> endothelial injury, increased platelet activation, platelet consumption–> decreased intravascular volume
Renal system changes in preeclampsia
Renal: nL= increased renal plasma flow, GFR
Preeclampsia = vasospasm, capillary endothelial swelling–> reduced GFR, increased uric acid, creatinine
Hemodynamic changes in preeclampsia
Normal= Prostacyclin, thromboxane A2 increased in pregnancy (PGI > TXA) - PGI allows for vasodilation, inhibits platelet aggregation Preeclampsia= TXA>PGI Capillary leak (proteinuria, edema) NO reduced (less vasodilation)
Hepatic system changes in preeclampsia
Transaminase elevations in about 10% cases
Hematologic changes in preeclampsia
Thrombocytopenia
Severe= decreased fibrinogen, increased PT, PTT (seen in DIC)
Severe preeclampsia
BP >= 160/110 Proteinuria= 5 g/24 hour urine or dip +3 to +4 Oliguria Cerebral/visual disturbances (could be close to developing eclampsia) Epigastric pain (HELLP) Pulmonary edema Impaired liver function Thrombocytopenia
Treatment: delivery if maternal complications of abNL fetal testing
32 weeks: deliver
HELLP sydrome
Hemolysis, Elevated Liver enzymes, Low Platelets
2-12% cases of preeclampsia (severe)
DIC, periportal liver necrosis, hemorrhage, coma, nephrogenic diabetes insipidus, subcapsular liver hemotoma
May see NO HTN, proteinuria
Present with RUQ/epigastric pain, N/V
Maternal Complications of Preeclampsia
Death CVA DIC Placental abruption- 5% renal failure Subcapsular liver hematoma/rupture Pulmonary edema Eclampsia Liver failure
Fetal complications of Preeclampsia
Death- 10% Prematurity RDS (respiratory distress syndrome) IVH (intraventricular hemorrhage) Retinopathy Necrotizing enterocolitis BPD (bronchopulmonary dysplasia) IUGR (intrauterine growth restriction)- 18% Fetal asphyxiation
Treatment of preeclampsia
Only cure= delivery
Mild preeclampsia: deliver if >= 36 weeks
Severe preeclampsia: deliver if >= 32 weeks
Magnesium sulfate= best agent for treatment of eclampsia seizures, prophylaxis in preeclampsia
Mild preeclampsia
HTN: 120-140/70-90
Proteinuria= 300 mg/24 hours or 0.1 g/L spot
Deliver greater than 36 weeks
delivery
Magnesium sulfate
anticonvulsant, more efficacious than dilantin
Slows NM conduction, depresses CNS irritability
Renal excretion
Toxic levels= somnolence, respiratory difficulty, cardiac arrest
Eclampsia
Convulsions unrelated to other condutions, + evidence of preeclampsia
2-4% of preeclampsia patients
Headache, visual symptoms, RUQ/epigastric pain
Short-lived convulsions (60-75 seconds)
Recurrence rates of preeclampsia
25% in second pregnancy
severe preeclampsia–> 65% recurrence
HELLP recurrence low
Prevention: low dose aspirin (10-20% reduction in recurrence), calcium
Low risk HPV types
Associated with warts
6, 11
40, 42, 43, 44, 53, 54, 61, 72, 73, 84
High risk HPV types
Associated with cervical cancers (at least found in any case of cervical cancer), other cancers of genital tract
16, 18, 45
31, 33, 35, 39, 51, 52, 56, 58, 59, 68, 82
HPV and cervical cancer
HPV 16 found in 50% of cervical cancers, most commonly identified in HSIL
HPV 18= squamous carcinoma, adenocarcinoma, cervical adenocarcinoma in situ
* HPV clearance: 50% by 6 months, 66% at 12 moths, 80% at 2 years- only when integrated into genome can lesion progress from LSIL to HSIL or carcinoma
ASCUS (pap smear)
Atypical squamous cells of undetermined significance
- 5-7% chance of biopsy confirmed CIN 2/3, but only 0.1% chance of invasive carcinoma (therefore need follow-up hr-HPV DNA testing)
- ASCUS pap with positive HPV DNA has 30% incidence of high-grade lesion on colposcopy
ASC-H (pap smear)
Atypical squamous cells, cannot exclude high grade lesion
* colposcopy reading shows 25% to have severe pre-cancerous changes
AGC (pap smear)
Atypical glandular cells
AIS (pap smear)
Adenocarcinoma in situ
Possible high risk HPV
22, 66, 73
Detection of HPV
Liquid-based pap: can use residual material to detect high risk HPV DNA via:
Hybrid capture 2
Cervista
PCR
- only recommended for women >30, performed every 3 years (or 6 years with pap smear)