NDD easyone pro User Manual

Appendix
146 EasyOne Pro™ / EasyOne Pro™ LAB
12.4 Introduction to Adjustment of DLCO Measurements
Adjustments of DLCO measurements are described in detail in the 2005
ERS/ATS statement.
In the paper, however, the adjustment is described as a change of the DLCO
predicted values. After several discussions with opinion leaders, we have to
conclude that it is more common to compute a DL
adj
value that is computed
from the measured DLCO value. This DL
adj
value is then compared to the
(unchanged) predicted values. The following table describes this:
As can be seen from the table above, the %Predicted is the same if  = 1 /
.
This means that the equations of the ERS/ATS statement have to be inver-
ted (e.g. factor is multiplied instead of divided). If compared to the original
formulas in the ERS/ATS statement the following formulas are therefore
‘inverted’ (multiplication instead of division and vice versa).
Adjustment for hemoglobin
The following formula is applied to correct for hemoglobin:
Male adults (age >
15): DL
adj
= DLCO / (1.7 × Hb / (10.22 + Hb))
Hb in g/dl
Female and children (age < 15): DL
adj
= DLCO/ (1.7× Hb / (9.38 + Hb))
Hb in g/dl
Unit conversion: Hb [g/dl] = Hb [mmol/l]/0.616
(according to other sources, the factor is 0.6206)
Allowed range for Hb: 0 to 100 g/dl
Default value male adults
(age >
15): 14.6 g/dl (9.00 mmol/l)
Default value female and children
(age < 15): 13.4 g/dl (8.26 mmol/l
Comment Parameter Predicted % Predicted
DLCO
meas
DLCO
pred
DLCO
pred
/ DLCO
meas
ERS/ATS state-
ment
DLCO
meas
DLCO
pred
×  DLCO
pred
× DLCO
meas
EasyOne Pro DL
adj
= DLCO x  DLCO
pred
DLCO
pred
/ (DLCO
meas
x 

NDD easyone pro Specifications

General

Brand	NDD
Model	easyone pro
Category	Medical Equipment
Language	English