Fluid for Creatinine

Specimen Required

FLUID (All Body Fluid)

Fasting Required

Purpose of the Test

Fluid for Creatinine test is ordered to measure the level of creatinine in a fluid sample (such as urine or cerebrospinal fluid). Creatinine is a waste product produced by muscle metabolism that is excreted by the kidneys. This test is usually ordered to evaluate kidney function or to diagnose conditions that may affect the kidneys, such as kidney disease or urinary tract obstruction.

When this test is required

The test result is interpreted by comparing the measured creatinine level in the fluid sample to the expected range for a person’s age, gender, and body size. A high creatinine level may indicate reduced kidney function, while a low creatinine level may indicate overhydration or reduced muscle mass. However, the interpretation of the test result must be done in conjunction with other clinical information, including medical history and physical examination.

What the Test Detects

The test measures the level of creatinine in a fluid sample, which is an indicator of kidney function. The results are used to diagnose kidney disease, evaluate kidney function, and monitor the effectiveness of treatments.

Preparation for the Test

No specific test preparation is usually required for fluid creatinine testing. However, it is important to follow any instructions provided by the healthcare provider regarding the collection and handling of the fluid sample.

Sample Requirements

A sample of fluid (such as urine or cerebrospinal fluid) is required for this test. For urine creatinine testing, a clean-catch midstream urine sample is generally used. For cerebrospinal fluid creatinine testing, a sample of cerebrospinal fluid is collected via lumbar puncture.

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