Disease staging: CliniCal anD CoDeD Criteria - HCUP

Hypoxemia:
pO2 < 60 mmHg with patient breathing room air
OR Alveolar-arterial gradient > 15 mmHg
(693 x F I o 2 )-(1.2 x pCO 2 )-pO 2 > 15 mmHg
[calculated from arterial blood gas values]
Reference ranges: pO 2 83 - 108 mmHg
Gradient ≤ 10 mmHg
IgG Index:
An index of local IgG synthesis in the CNS.
[IgG csf / IgG serum ]
x 100
IgG Index =[Albumin csf / Albumin serum ]
Reference range: 0.3 - 0.6
Infectious arthritis: See Arthritis, infectious
Initial peak systolic right ventricular pressure:
Increased: > 25 mm Hg
Reference range: < 20 mm Hg
Initial pulmonary wedge pressure:
Increased: > 15 mm Hg
Reference range: 3 - 15 mmHg
International Normalized Ratio (INR):
A method of expressing the prothrombin time that eliminates laboratory-tolaboratory
variation in results due to use of different thromboplastins.
INR =
[ ]
Normal mean PT
Patient PT
ISI
Where ISI is the International Sensitivity Index of the thromboplastin used
Reference Value : 1.0
G-21