Child Health And vaccines Flashcards
Purpose of Screening
The overall purpose of screening can be seen as improving the outcome of the disease screened for
Screening
These programmes are about reducing risk by initiating an intervention that will reduce the severity of the condition. (Sometimes)
Is screening a Diagnostic Test?
NO
Key Concepts behind Screening
Screening Programmes are offered to the whole eligible populations.
By screening for a condition: outcome is changed for the better.
Benefits of screening must outweigh potential harm
Sensitivity
proportion of true positives correctly identified by the test
Specificity
proportion of true negatives correctly identified by the test.
Effectiveness of screening
This is determined by specificity and sensitivity of the test which must be balanced to avoid missing people (false negatives) or labelling people falsely (false positives)
PPV
Positive Predictive Value is the chance a person will have the disease after a positive screening test. It is dependent on both sensitivity or specificity and the prevalence of the condition being screened for.
Antenatal and Newborn Screening
These are a choice; women and families are given knowledge of the purpose and consequences of all screening tests.
a five-day old baby having a heel prick test for phenylketonuria is an example of what type of test
NHS Newborn blood spot Screening
What type of test is ?
A three year old having tympanometry and hearing test
Diagnostic tests
Babies born prematurely have vaccinations according to?
Chronological not gestational age
Why do babies get immunisation after 8 weeks?
As anytime before, the infant’s immune system will not be mature enough to enable a good response to the vaccine
Which nutritional influences can decrease fertility?
Weight loss > 15% normal body weight Negative energy balance Obesity Poor iron stores Caffeine
How much fluid a day is needed to prevent dehydration?
About 6-8 drinks per day (1 1/2 litres)
More will be needed during physical activity or in hot weather