The single-breath transfer factor for carbon monoxide and respiratory symptoms in a Norwegian community sample.

Single breath transfer factor for carbon monoxide in an asymptomatic population of never smokers.

BACKGROUND Data on reference values of transfer factor variables in general populations of asymptomatic never smokers are limited. The aim of this study was to examine the relation between test variables and age, height, haemoglobin concentration and carboxyhaemoglobin concentration. METHODS Measurements of single breath transfer factor for carbon monoxide (TLCO) were obtained for a randomly ...

Single breath carbon monoxide diffusing capacity (transfer factor)

Variability of the single-breath carbon monoxide transfer factor as a function of inspired oxygen pressure.

We measured single-breath CO transfer factor (TLCO) and alveolar oxygen partial pressure (PAO2) six times at each of three fractions of inspired oxygen (FIO2) (0.17, 0.21, 0.26) in twelve healthy subjects, to determine whether one FIO2 would have the advantage of producing less variable TLCO results than the others. Measured TLCO was adjusted for the increase in carboxyhaemoglobin during the te...

Measurement technique influences the response of transfer factor (TICO) to salbutamol in patients with airflow limitation.

Single-breath transfer factor obtained using a multibreath estimate of alveolar volume (TI) was measured before and after salbutamol in twenty patients with reversible airflow limitation. The effective breathholding time was calculated by four methods due respectively to Ogilvie and colleagues as modified by the American Thoracic Society (ATS), ATS Epidemiological Standardization Project (ESP),...

The effect of human pregnancy on the pulmonary transfer factor for carbon monoxide as measured by the single-breath method.

1. The pulmonary transfer factor for carbon monoxide was measured by the single-breath method in 21 pregnant women with no previous history of cardiac or respiratory disease. Measurements were made at monthly intervals throughout pregnancy and once post partum. 2. The transfer factor was higher in the first trimester of pregnancy than in the non-pregnant state. There was a fall in the transfer ...