Hypertensive Disorders Flashcards
(38 cards)
Deadly triad of Pregnancy
- Hypertensive Disorders (16%)
- Hemorrhage (13%)
- Infection (Abortion- 8%; Sepsis -2%)
How much does hypertensive disorders complicate pregnancies?
5-10%
Describe Gestational HTN
BP >140/90 AFTER 20 weeks AOG
(-)proteinuria
Resolves 12 weeks postpartum
Proteinuria in pregnancy
> 300mg/24hr
Protein:Creatinine ratio >0.3
Dipstick 1+ persistent
Describe preeclampsia and eclampsia syndrome
Both occurs BP >140/90 AFTER 20 weeks AOG in previously normotensive woman
(+) Proteinuria
*Eclampsia (+) seizure
Other labs that you can consider to identify preeclampsia and eclampsia syndrome
- CBC with PC = Thrombocytopenia (<100,000/uL)
- UA with stat albumin; BUN; Cr = Renal insufficiency (Cr >1.1dL or 2x)
- AST & ALT = Liver involvement (2x)
- Cerebral symptoms (Headache, Visual Disturbances, Convulsions)
- Pulmonary Edema
- Electrolytes
- LDH (>600 IU/L) = Assess hemolysis in HELLP syndrome
Describe Chronic HTN
(+) Hx of HTN BEFORE 20 weeks AOG
(+) HTN AFTER 12 weeks pp
Describe Preeclampsia superimposed on Chronic HTN
AFTER 20 weeks AOG…
(+) Proteinuria
Sudden increase in BP/Proteinuria after 20 weeks
(+)Thrombocytopenia
BP during trimesters
1st: Increased
2nd to early 3rd: Decreases
Late 3rd: Normal
Pathology of preeclampsia
Systematic endothelial leak
Risk factors of Preeclampsia
- Young and nulliparous
- Genetic Predisposition
- Maternal Weight, Obesity, Metabolic Syndrome
- Multifetal gestation
- Hyperhomocysteinemia
- Hx of preeclampsia
Management for Pre-eclampsia
1st line: Metyldopa 500mg PO q6-8h (max: 3g/day)
2nd line: Hydrazaline 25mg PO q6-12h
Complications of Pre-eclampsia
Abruptio placenta
End organ damage
Intrauterine Growth Restriction (IUGR)
Increased risk for CS
Emergency Medicine for Pre-eclampsia
Hydralazine 5mg IV PRN q20mins for BP >160/100 (max: 30mg “5-5-5-10-10”)
How does Magnesium Sulfate helps in Pre-eclampsia?
Seizure protection; Protects Infant’s Neurological development
How to use Magnesium Sulfate for Pre-eclampsia?
- Give IV sedation (Promethazine 25mg)
- Insert foley catheter to check U/O if >30cc/hr
Loading dose: 4g Slow Intravenous Push (SIVP), 5mg IM each buttocks (Total: 14mg)
Maintenance dose: 5mg IM alternating buttocks q6h x 4 doses (total of 20mg within 24 hours)
Why should you check U/O before administering MgSO4?
Because it’s renally cleared
Therapeutic dose of MgSO4
4-7 meq/L
Antidote for MgSO4 toxicity
Calcium Gluconate 1g SIVP
Possible occurrences during MgSO4 toxicity
8-10 mEq/L = Hyporeflexia, Areflexic @ 10
10-12 = Respiratory depression, arrest @ 12
>12 = Altered Consciousness
Can you use aspirin to prevent progression to superimposed pre-eclampia?
Yes
Epidemiology of Eclampsia
-10% of cases occurs before overt proteinuria is detected
-Can occur anytime during pregnancy and pp
1st: assoc with molar/hydropic degeneration of placenta
3rd: Most common
PP: within 48hrs
Management of Eclampsia
- Give MgSO4
- Control severe HTN (IV Hydralazine/Nicardipine)
- Delivery
Goal BP in management of Eclampsia
140/90 to 155/105