You can also call the appointment center to schedule, change or cancel an appointment or ask questions.
(24-hour urine, urine volume)
A 24-hour urine collection is a simple diagnostic procedure that measures the components of urine. The test is noninvasive (the skin is not pierced), and is used to assess kidney (renal) function.
Twenty-four hour urine collection is performed by collecting a person's urine in a special container over a 24-hour period. The container must be kept cool during this time until it is returned to the lab for analysis.
Urine consists of water and dissolved chemicals such as sodium, potassium, urea (formed from protein breakdown), and creatinine (formed from muscle breakdown), along with other chemical compounds. Normally, urine contains specific amounts of these waste products. If these amounts are not within a normal range, or if other substances are present, it may be an indication of a particular disease or condition. The results of a 24- hour urine collection may provide information to help your physician make or confirm a diagnosis.
Related procedures that may be used to diagnose kidney disease include kidney ultrasound, kidney scan, kidney biopsy, and renal arteriogram.
The body takes nutrients from food and converts them to energy. After the body has taken the nutrients it needs from the food, waste products are left behind in the bowel and blood.
The urinary system keeps chemicals, such as potassium, sodium, and water in balance, allowing the body to function properly. The kidneys also remove protein waste, called urea, from the blood. Urea is produced when foods containing protein, such as meat, poultry, and certain vegetables, are broken down in the body. Urea is carried in the bloodstream to the kidneys.
Other important functions of the kidneys include blood pressure regulation, and the production of erythropoietin, which controls red blood cell development in the bone marrow.
Twenty-four hour urine collection is a quick, simple diagnostic test that helps to diagnose problems with the kidneys. It is commonly performed to determine how much creatinine clears through the kidneys, but may also be used to measure protein, hormones, minerals, and other chemical compounds. Creatinine clearance testing provides information about kidney function.
Like all organs in the human body, the kidneys may be affected by various genetic and environmental circumstances, leading to kidney disease. Kidney (renal) disease may be temporarily or permanently damaging. Acute kidney disease has an abrupt onset and is potentially reversible. Chronic kidney disease progresses slowly over at least three months and can lead to permanent kidney damage. The causes, symptoms, treatments, and outcomes of acute and chronic kidney disease are different.
Conditions that can cause kidney disease include, but are not limited to, the following:
Twenty-four hour urine collection may be performed along with other diagnostic procedures, such as cystometry and cystography.
There may be other reasons for your physician to recommend 24-hour urine collection.
Twenty-four hour urine collection is a safe, noninvasive procedure that is usually done without direct assistance.
Certain factors or conditions may interfere with the accuracy of a 24-hour urine collection. These factors include, but are not limited to, the following:
There may be other risks depending on your specific medical condition. Be sure to discuss any concerns with your physician prior to the procedure.
Twenty-four hour urine collection may be performed on an outpatient basis or as part of your stay in the hospital. Procedures may vary depending on your condition and your physician's practices.
Generally, 24-hour urine collection follows this process:
Generally, there is no special type of care following 24-hour urine collection. However, your physician may give you additional or alternate instructions after the procedure, depending on your particular situation.
The content provided here is for informational purposes only, and was not designed to diagnose or treat a health problem or disease, or replace the professional medical advice you receive from your physician. Please consult your physician with any questions or concerns you may have regarding your condition.
This page contains links to other Web sites with information about this procedure and related health conditions. We hope you find these sites helpful, but please remember we do not control or endorse the information presented on these Web sites, nor do these sites endorse the information contained here.
American Urological Association, Inc.
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
National Institutes of Health (NIH)
National Kidney Foundation
National Library of Medicine