Revision Q. Lec 7

Question 1

How does the structure of the heart change from the foetus to birth and birth to young adulthood?

Answer 1

• foetus has ducts so that blood does not have to circulate to heart to get oxygen as the blood is already oxygenated
• post-natally left ventricle grows in response to resistance of blood pressure to pump blood around body
• heart gets bigger

Question 2

How does the structure of the heart change from the foetus to birth and birth to young adulthood?

Answer 2

• foetus has shunts so that blood does not have to circulate to heart to get oxygen as the blood is already oxygenated
• post-natally left ventricle grows in response to resistance of blood pressure to pump blood around body

Question 3

true or false the right ventricle does not increase in size as we grow

Answer 3

false

Question 4

how is the growth of the heart an example of allometric growth?

Answer 4

because they heart does not grow at the same rate = left side gets bigger then the right

Question 5

How is skeletal maturation assessed? (3) different ways

Answer 5

Greulich-pyle (GP) - uses wrist x-ray and then compares to standard x-ray plates

Tanner-whitehouse (TW) - bone-specific approach - 20 bones identified stage within a sequence of development

Fels method - Child’s X-ray matched to specific criteria for each bone, shape, epiphyseal union, attainment adult morphology. statistically weighted scoring

Question 6

what would the SA/CA ratio of a child with a SA or 13 and CA 12.5? what does it mean?

Answer 6

SA 13; CA 12.5 = this means that skeletal age is advanced compared to CA

can also be divided = SA/CA

• if ratio is above 1.0 = advancement
• if ratio is below 1.0 = delay

13/12.5 = 1.08