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Flashcards in antenatal screening Deck (18)
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1

define screening

Screening is a process of identifying apparently healthy people who may be at increased risk of a disease or condition

2

why do we screen three main points

Identify high risk group for diagnostic testing
• Counsel about risk of disease being present
• Offer treatment or prevention

3

what are the drawbacks of screening

false positives and negatives
harm from screening or further testing
cost

4

to screen for disease what does the disease have to be like, it's characteristics

have a detectable latent or early phase, must be an important health condition, an acceptable treatment exists

5

what is the criteria for a good screening test for a disease

1. Valid and reliable
2. Acceptable to population
3. Cost is proportionate to medical care as a whole

6

who is offered screening for sickle cell anaemia and thalassaemia

in high incidence population everyone, in low incidence population ethnic minority

7

when does screening for sickle cell and thalassaemia occur and how is it performed

blood test and pre conception to ten weeks

8

if screening test is positive for sickle cell thalassaemia what do you do next

test partner, or prenatal diagnosis, amniocentesis

9

what do you do if screening shows baby has sickle cell or thalassaemia

early specialist care, termination

10

what infectious diseases are screened for in pregnant women and baby

HIV HEPB SYPHILLIS

11

how gets screened for infectious disease when pregnant

all women

12

how is screening for infectious disease done

serology (looking in serum for antibodies)

13

if pregnant mother test positive for syphilis what do you do

maternal treatment to prevent child transmission

14

if pregnant mother test positive for hiv what do you do

Maternal treatment • High risk antenatal care • Prevent transmission to neonate

15

if pregnant mother test positive for hep b what do you do

Changes antenatal care prevent transmission • Neonate receives vaccine

16

how do you screen for trisomy 21

• Combined test
• Fetal nuchal translucency
• Maternal serum βHCG
• Maternal serum PAPP_A

17

when are mother screened for tri 21

Between 11+0-13+6 weeks gestation by ultrasound

18

List fetal anomalies that can be detected by ultrasound(not limited to)

Brain • Acrania • Holoprosencephaly
Abnormalities that can be detected by ultrasound
• Spine • Open spina bifida • Face • Facial cleft • Anopthalmia • Neck • Cystic hygroma • Thorax • Congenital diaphragmatic hernia
• Abdominal Wall • Exomphalos • Gastroschisis • Urinary tract • Bilateral renal agenesis • Urethral obstruction • Extremities • Club foot • Arthrogryposis • Skeleton • Skeletal Dysplasia • Achondroplasia