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Medicine (MD/DO)
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First Aid
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First Aid for the USMLE Step 2 CK (10th Ed.)
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Obstetric Complications of Pregnancy

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First Aid for the USMLE Step 2 CK (10th Ed.) | Medicine (MD/DO) School Study Aid

Obstetric Complications of Pregnancy
16 Picmonics to Learn | 39 mins
Ectopic Pregnancy
Signs and Symptoms
Lower Abdominal Pain
Delayed Menses
Abnormal Vaginal Bleeding
Shock
Referred Shoulder Pain
Cullen Sign
Considerations
Methotrexate
Surgery
RhoGAM
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2 mins
Placental Implantation Abnormalities
Mechanism
Placenta Adheres Directly to Myometrium
Placenta Accreta
Placenta Increta
Placenta Percreta
Caused by Scar Tissue
Hemorrhage
Diagnosis
Ultrasound is First-line, then MRI
Treatment
C-section Delivery
Artery Ligation or Embolization
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2 mins
Abruptio Placentae
Mechanism
Premature Separation of Placenta
Assessment
Tearing Pain
Bleeding (Often Concealed)
Rigid Uterus
Contractions
Interventions
Corticosteroids as Needed
Emergent Delivery
Considerations
Increased Risks for Neonate
Rh (Rhesus) Incompatibilities
Increased Risk for Shock
Monitor Fetal Heart Rate
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3 mins
Placenta Previa
Mechanism
Placenta Covers Cervical Os
Assessment
Painless
Bright Red Vaginal Bleeding
Interventions
Stable Fetus
Bed Rest
Observation
Unstable Fetus
C-section Delivery
Considerations
Risk for Shock
Magnesium Sulfate
Tocolysis
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3 mins
Vasa Previa
Characteristics
Fetal Vessels Over Internal Cervical Os
Risk Factors
Velamentous Umbilical Cord Insertion
Placental Abnormalities
Multiparity
Presentation
Rupture of Membranes
Painless Vaginal Bleeding
Fetal Distress
Diagnosis 
Doppler Ultrasound
Treatment
Emergency Cesarean Delivery
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2 mins
Intrauterine Growth Restriction (IUGR)
Pathophysiology
Slowed Fetal Growth
Symmetric Type
Factors Early in Pregnancy
Genetic (Chromosomal) Abnormalities
Congenital Infections
Asymmetric Type
Preserved Head Circumference
Factors Late in Pregnancy (2nd / 3rd trimester)
Placental Insufficiency
Diagnosis
Ultrasound
< 10th Percentile (for SGA)
Decreased Fundal Height
Complications
Increased Perinatal (Fetal) Morbidity and Mortality
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2 mins
Fetal Macrosomia
Pathophysiology
Increased Birth Weight
> 4500 g
Causes
Maternal Obesity
Gestational Diabetes
Diagnosis
Weigh Newborn at Birth
Ultrasound
Hadlock's Formula
Complications
Birth Canal Trauma
Neonatal Hypoglycemia
Shoulder Dystocia
Treatment
Planned Cesarean Section
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2 mins
Polyhydramnios
Pathophysiology
Increased Amniotic Fluid
Causes
Duodenal Atresia (or Gastrointestinal Atresias)
Maternal Diabetes
Multiple Gestations
Anencephaly
Hydrops Fetalis
Diagnosis
Ultrasound
Amniotic Fluid Index (AFI) > 25 cm
Treatment
Weekly Nonstress Test (NST) and Biophysical Profile (BPP)
Amnioreduction
Indomethacin
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3 mins
Oligohydramnios
Decreased Amniotic Fluid
Etiologies
Renal Agenesis (Fetal Urinary Tract Abnormalities)
Uteroplacental Insufficiency
Premature Rupture of Membranes (PROM)
Diagnosis
Ultrasound
Amniotic Fluid Index (AFI) < 5 cm
Complications
Spontaneous Abortion
Pulmonary Hypoplasia
Musculoskeletal Abnormalities
Intrauterine Growth Restriction (IUGR)
Treatment
Treat Underlying Cause
Delivery (When Viable)
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2 mins
Potter Sequence
PATHOGENESIS
Oligohydramnios
clinical findings
Limb Deformities
Facial Anomalies
Pulmonary Hypoplasia (Most Common Cause of Death)
Etiologies
Autosomal Recessive Polycystic Kidney Disease (ARPKD)
Posterior Urethral Valves
Chronic Placental Insufficiency
Bilateral Renal Agenesis
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3 mins
Rh Hemolytic Disease of the Fetus and Newborn
Characteristics
Rh (Rhesus) Incompatibilities
Rh(D)- Mother and Rh(D)+ Fetus
Anti-Rh(D) Antibodies
Hemolytic Anemia
Presentation
Hydrops Fetalis
Neonatal Jaundice
Kernicterus
Diagnosis
Positive Coombs Test
Ultrasound
Management
RhoGAM [Anti-Rh(D) Immunoglobulin]
Intrauterine Blood Transfusion
Phototherapy
IVIG (Intravenous Immunoglobulin)
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4 mins
ABO Hemolytic Disease of the Fetus and Newborn
Characteristics
ABO Incompatibilities
Type O Mother and Type A/B Fetus
Anti-A or Anti-B Antibodies
Hemolytic Anemia
Presentation
Often Asymptomatic
Neonatal Jaundice
Diagnosis
Negative Coombs Test
Management
Phototherapy
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2 mins
Hydatidiform Mole (Molar Pregnancy)
Cause/Mechanism
Abnormal Fertilization
Assessment
Symptoms of Pregnancy
Elevated hCG
Vaginal Bleeding
Inappropriate Uterine Growth
No Fetal Heart Rate (FHR)
Interventions
Dilation and Curettage (D&C)
Emotional Support
Considerations
No Pregnancy 1 Year
Hysterectomy
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3 mins
Complete Hydatidiform Mole
Characteristics
Gestational Trophoblastic Disease
Fertilization of Enucleated Egg
Diploid Fetal Karyotypes
Hydropic Chorionic Villi
Presentation
Vaginal Bleeding
Preeclampsia
Diagnosis 
Increased Beta hCG
"Snowstorm" / "Bunch of Grapes" Appearance
Theca Lutein Cysts
Considerations
Dilation and Curettage (D&C)
Methotrexate
Increased Risk of Choriocarcinoma
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3 mins
Choriocarcinoma
Germ-cell tumor
Trophoblastic tissue
Hematogenous spread to lungs
Malignant
Theca-lutein cysts
Hydatidiform Mole
hCG
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59 secs
Partial Hydatidiform Mole
Characteristics
Gestational Trophoblastic Disease
Dual Fertilization of Haploid Egg
Triploid Fetal Karyotypes
Hydropic Chorionic Villi
Presentation
Vaginal Bleeding
Diagnosis 
Increased Beta hCG
Fetal Structures
Considerations
Dilation and Curettage (D&C)
Methotrexate
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2 mins

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