• What role does urea play in the body?
• How is urea produced and excreted?
• What are the principles of the analytical methods for measuring urea?
• What are common sources of error in urea measurement?
• When is urea measurement indicated?
• What are the patient preparation steps for urea measurement?
• What are the reference ranges for urea in serum for males and females?
• What does high urea (uraemia) indicate?
• What does low urea indicate?
• What is azotemia and how is it related to urea levels?