Incomplete urine collection is an important source of error in inulin clearance measurement.

This allows for only a single radioactive urine collection.

A 24-hour urine collection, which measures the total amount of protein in the urine collected over 24 hours.

A related type of device is used for urine collection in bedridden and unconscious patients.

In some cases, GFR may also be estimated with a 24-hour urine collection.

Longer versions rely on urine collections on oral dexamethasone over various days.

The diagnosis can be established by measuring catecholamines and metanephrines in plasma (blood) or through a 24-hour urine collection.

In the interim, they used a manual mode for urine collection.

However, this study was open and only two urine collections were used to assess albumin excretion at baseline and after 12 months.

Creatinine clearance test, which requires both a blood sample and a 24-hour urine collection, to assess kidney function.