Fetal Interventional Ultrasound Flashcards
(23 cards)
What is amniocentesis?
Sampling of fluid within the amniotic sac
List the indications for amniocentesis
- Increased AFP
- History
- Genetic disorders
- Chromosomal disorders
- Lung maturity
At what gestational age is genetic amniocentesis typically performed?
14 to 20 weeks
What is the primary purpose of chorionic villus sampling (CVS)?
To obtain cells from the fetal portion of the placenta
Explain the difference between transcervical and transabdominal technique of CVS
Transcervical uses a catheter introduced through the cervix, while transabdominal uses a spinal needle introduced through the abdominal wall
What is percutaneous umbilical blood sampling (PUBS)?
Sampling of blood via the umbilical cord
What is another name for percutaneous umbilical blood sampling?
Cordocentesis
What are the uses of percutaneous umbilical blood sampling?
- Blood sampling
- Transfusion
- Therapy
What is coelocentesis?
Sampling of the exocoelomic cavity via an endovaginal approach
What are the disadvantages of coelocentesis?
- Coelomic cells difficult to culture
- Safety concerns
What is fetal transfusion?
A procedure to transfuse blood to the fetus, typically via cordocentesis
What is the significance of Rh immune globulin in fetal therapy?
It reduced the incidence of hemolytic disease
What is the current practice for fetal blood sampling?
MCA dopplers are used, and transfusions occur only in patients with abnormal PSV MCA
Fill in the blank: Fetal therapy includes infusing pharmacologic agents for therapeutic purposes such as _______.
Digoxin in hydropic fetuses with SVT
What is the purpose of hysterosonosalpingography?
To diagnose endometrial polyps, Asherman syndrome, and tubal patency
What is culdocentesis?
Sampling fluid from the posterior cul-de-sac
What imaging techniques are used during culdocentesis?
- 2D imaging
- Color imaging
What type of device is an IUCD?
Intrauterine contraceptive device
True or False: Chorionic villus sampling can provide faster results compared to amniocentesis.
True
What are the advantages of chorionic villus sampling?
- Earlier genetic testing
- Faster results
What is a common complication of fetal transfusion therapy?
Induced fetal anomalies
What is the purpose of using continuous sonographic monitoring during amniocentesis?
To monitor fetal movement and ensure safety during the procedure
What is the typical gestational age to perform chorionic villus sampling?
Week 9–10
