Table 2 Physiologic markers of renal function

GFR

PAH

No

No

Creatinine

Yes

Yes

Creatinine clearance

2-hour: yes

Yes

24-hour: yes

No

BUN

Yes

Yes

Inulin clearance

Yes

No

Iohexol/iopromide

Yes

Yes

Iothalmate

Yes

Yes

I¹³¹-MAG

Yes

No

Cr⁵²-EDTA

Yes

No

Renal blood flow

Angiography

Yes

No

Indicator dilution (thermal or PAH)

Yes

No

BOLD MRI

Yes

No

Ultrasound

Yes

Yes

Tubular function

Urine output

Yes

Yes

Input-output balance

Yes

Yes

Urinalysis

Yes

Yes

FeNa

Yes

Yes

Osmolality

Yes

Yes

Creatinine (U/P)

Yes

Yes

Tubular proteins

No

No