Optionally, but not shown, the ratios may have by-reference, inferred-from relationships to the Content Items holding the numerator and denominator values.
Nest
Code Meaning of Concept Name
Code Meaning or Example Value
TID
1
OB-GYN Ultrasound Procedure Report
TID 5000
1.n
….
1.9
Fetal Biometry Ratios
TID 5004
1.9.1
HC/AC
77%
1.9.2
FL/AC
22 %
1.9.2.1
Normal Range Lower Limit
20 %
TID 312
1.9.2.2
Normal Range Upper Limit
24 %
1.9.2.3
Normal Range Authority
Hadlock, AJR 1983
1.9.3
FL/BPD
79 %
1.9.3.1
71 %
1.9.3.2
81 %
1.9.3.3
Hohler, Am J of Ob and Gyn 1981
1.9.4
Cephalic Index
82 %
1.9.4.1
70 %
1.9.4.2
86 %
1.9.4.3
Hadlock, AJR 1981