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Table 1 Pulmonary function results on three different pulmonary function instruments.

From: Smallest detectable change in volume differs between mass flow sensor and pneumotachograph

 

MF

PT

p

Number of hospitals

3

5

 

Number of subjects

8

20

 

VC (L.)

5.0 (0.7)

4.7 (1.2)

0.47

DLCO (mmol/kPa/min)

9.9 (2.3)

9.0 (2.4)

0.41

VA (L.)

6.4 (1.0)

5.8 (1.4)

0.29

DLCO/VA (mmol/kPa/min/L.)

1.5 (0.3)

1.6 (0.2)

0.81

  1. Results are expressed as mean and standard deviation. Mass flow sensor (MF); pneumotachograph (PT); VC: vital capacity; DLCO: transfer factor for carbon monoxide; VA: alveolar volume.