24 Hour Microalbumin Creatinine Ratio Test

The 24-hour microalbumin creatinine ratio (ACR) test is a urine test used to measure the levels of microalbumin and creatinine in a patient's urine over a 24-hour period. This test is commonly used to screen for kidney damage in people with diabetes, high blood pressure, and other conditions that can cause damage to the kidneys over time.

The 24-hour ACR test involves collecting all the urine that is passed by the patient over a 24-hour period, usually starting in the morning. The patient will receive specific instructions on how to collect and store the urine sample, which may involve keeping the urine refrigerated or using a preservative.

Once the urine collection is complete, the urine sample is analysed in a laboratory to measure the levels of microalbumin and creatinine. The ACR is then calculated by dividing the microalbumin level by the creatinine level. A high ACR may indicate that the kidneys are not functioning properly and may be damaged.

The 24-hour ACR test is a more accurate measure of kidney function than a single ACR test or other urine tests, as it provides a more comprehensive picture of kidney function over a longer period of time. However, it can be more time-consuming and inconvenient for patients to collect a 24-hour urine sample.

Overall, the 24-hour ACR test is an important tool in the early detection and management of kidney disease, as early intervention can slow or even prevent the progression of kidney damage.