Comment:

Spirometry is normal with high FEF25‑75 and spirometric value consistent with a restrictive process. Gas transfer, uncorrected for haemoglobin, is severely reduced. Static lung volumes show a moderately reduced inspiratory capacity and residual volume but are otherwise normal. Overall, the results are consistent with intersitial lung disease and the patient’s history of Sjogren's syndrome. In comparison with tests performed on 25 Oct. 1999, spirometry and lung volumes have remained stable. There has been a further deterioration in gas transfer.