Lecture 23 - 208/2017 Flashcards
What does normal growth depend on?
- Good general health.
- Normal nutrition and genetics.
- Adequate nutrition.
- Caring environment.
What are the causes for abnormal growth?
- Genetic disorders.
- Endocrine disorders.
- Cartilage or bone disorders.
- General chronic disease.
What are the phases of growth?
- Infant - rapid growth during the first two years of life (less GH dependent).
- Childhood - constant annual growth (GH dependent).
- Puberty - rapid growth primarily dependent on sex steroids and increased GH release.
Describe proportion changes in growth?
Human beings follow a cephalo-caudal gradient of brith. From birth to puberty the legs grow relatively faster than other post-cranial body parts.
What is the mid-parental height (MPH) range?
This is what can determine the potential height of the person.
What is the MPH for a boy?
MPH = Father + (Mother +13cm) / 2 +/- 8cm (range)
What is the MPH for a girl?
MPH = (Father - 13cm) + Mother / 2 +/- 8cm (range).
What is a height velocity (HV) chart?
This is the measure of a person’s growth over a period of time (6-12 month interval).
How is a HV chart useful?
It differentiates normal variant short stature from pathological short stature.
Where does the normal HV lie?
25-75th percentile.
What is short stature?
It is when you a short. It is a common clinical presentation - a symptom or a variant (NOT a disease). Normal short stature still grows with normal HV.
What is short stature history?
- Mother and fathers heights - MPH.
- Family history of delayed puberty menarche >14 years in females and continued growth after high school in males.
- Look at other siblings child development records.
- Symptoms of underlying illness.
What are the growth disorder categories?
- Normal HV: normal variants:
- familial short stature.
- constitutional delay in growth and development. - Poor height velocity: usually pathological
- proportionate.
- disproportionate.
What is bone age?
XRAY of your hand to give an estimate of your “biological age”. It is taken in approximately 1 year intervals.
What happens if your bone age is higher than your actual age?
You will be short.