MRCP2-4001

A 33 year-old man came to his GP complaining of dark coloured urine. He had a sore throat two weeks ago but didn’t seek medical attention. He had no significant medical or family history.

During the examination, his pulse was recorded at 60 beats per minute and his blood pressure was 160/95 mmHg. There were no notable findings during abdominal examination. Urinalysis revealed 3+ blood and 1+ protein.

What is the primary diagnostic test that needs to be conducted?