- Discussion:
-
growth-remaining method
- straight-line graph method:
- arithmetic method is the simplest,
but least accurate.
- proximal femoral physis::
- 4 mm / yr (1/8 in/yr)
-
distal femoral physis:
- 10 mm / yr (3/8 in/yr)
- contributes to 70% of femoral growth or 54% of lower limb growth;
-
proximal tibial physis:
- 6 mm / yr (1/4 in/yr)
- contributes to 60% of tibia growth or 46% of limb growth;
- distal tibial physis:
- 5 mm / yr (3/16 in/yr)
- total adult height = Ht. at age 2 x 2
- growth ceases: 14 - 15 yrs in girls
16 - 17 yrs for boys
- Menelaus method:
- calculate current discrepancy
- calculate the change in discrepancy per year
- calculate the time remaining for growth (girls: 14 - current, boys: 16- current)
- calculate the discrepancy at maturity: (current discrepancy + (years remaining * discrepancy per year));
-
Muliplier Method:
-
Multiplier method for predicting limb-length discrepancy.
-
Clinical validation of the multiplier method for predicting limb length at maturity, part I.
-
Clinical Validation of the Multiplier Method for Predicting Limb Length Discrepancy and Outcome of Epiphysiodesis, Part II.
-
The multiplier method for prediction of adult height.
A graphic method for timing the correction of leg-length discrepancy.
Deficiencies of current methods for the timing of epiphysiodesis.
DG Little et al.
J. Pediatric Orthopaedics. Vol 16. No 2. 1996. p 173.
A graphic method for timing the correction of leg-length discrepancy.
Eastwood DM.
Cole WG.
J Bone Joint Surg Br.
77(5):743-7, 1995 Sep.
-
contributions to growth of each plate in each of the long bones:
proximal humerus:
80%
distal humerus:
20%
proximal radius:
25%
distal radius:
75%
proximal ulna:
20%
distal ulna:
80%
proximal femur:
30%
distal femur:
70%
proximal tibia:
57%
distal tibia:
43%
proximal fibula:
60%
distal fibula:
40%
