DH is being treated for throat and neck cancer. He is on second week of radiotherapy of 7. Last week he had first dose of chemo (Cistaplatin). He has been completely flattened by chemo but I thought that was normal. Tonight he has a mild fever of 38, but feels so poorly. Chemo team who are 2 hours away told me to get him to A and E asap. They hooked onto IV antibiotics and running loads of tests. The last one was for venous gas. What is this test for please? Sorry I’m in such a state as he looks so poorly,