Hi,
Thank you for your query. I can understand your concerns.
Blue tinged lips is due to cyanosis-result of low blood oxygen levels.
Since his o2 sat of 99,it can be due to Methemoglobinemia-acquired resulting from overdose of nitrates, nitrite or nitroprusside.
Orange coloration of urine can be caused by:B complex vitamins or ,drugs like
phenazopyridine (pyridium,used to treat
urinary tract infections), rifampin,
clofazimine and anti-coagulants like phenindione,warfarin.
An opaque orange-pink urine color can result from abundant uric acid crystals which can be seen in acidic urine of patients who have undergone intestinal by-pass surgery or are receiving
chemotherapy for malignancy.
Orange urine may also be caused by
dehydration,which can concentrate your urine and make it much deeper in color,if he is not on any of those medication.
Large amounts of carrots or carrot juice(carotene) may also give urine an orange tinge.
Orange coloration of urine can rarely be due to urinary tract infection by certain gram negative organisms.
Regards
Dr. T.K. Biswas M.D.
Mumbai