Thanks for your query.
2 common causes of shortness of breath
in patients with kidney
1) Fluid overload: This can be identified by doing a Chest X Ray. If there is evidence of fluid in the lungs we could start him on diuretics or water pill
i.e., excess acid in the blood. This will be picked up by doing a blood gas analysis. If this is the case we could try some oral sodamint pills.
Hope this helps