When the urine is red and free of haem pigments (e.g. erythroctyes, haemoglobin or myoglobin), then the urine may be discoloured and described as 'raspberry', or 'cherry-red'
Green urine is a rare and benign side effect of propofol administration, and while often described in patients on prolonged propofol infusions
Purple urine bag syndrome (PUBS) is a rare but usually benign condition which causes the urinary catheter and bag to be stained purple.
Normally, urine is some shade of yellow with acid urine usually a darker colour than alkaline urine. Pathologically, it may be any colour.
You manage a young male with a subarachnoid haemorrhage. You are called to review because the patient has started to pass green urine
Casual perusal of the output from a patients indwelling catheter revelaed green urine. What are the commonest causes of this unusual urine?