| 19914-1 | Diffusion capacity/Alveolar volume (single breath.carbon monoxide+helium) |
| 19915-8 | Diffusion capacity/Alveolar volume Predicted |
| 19916-6 | Diffusion capacity/Alveolar volume |
| 69578-3 | Diffusion capacity.carbon monoxide/Alveolar volume adjusted for hemoglobin |
| 82619-8 | Diffusion capacity/Alveolar volume --pre bronchodilation |
| 82620-6 | Diffusion capacity/Alveolar volume --post bronchodilation |