How does a urinalysis strip work?

A urinalysis strip, also known as a dipstick, is a narrow, plastic strip equipped with several square-shaped pads of varying colors, each designed to test a specific chemical parameter in the urine. These pads are coated with reagents that react with particular substances found in the urine sample. When the strip is dipped into the urine, the reagents on the pads interact with the urine's chemical components, causing the color of each pad to change in response to the concentration of these substances.

Each pad on the strip is calibrated to detect a different parameter, such as glucose, protein, or pH levels. The color change on the pads occurs over specific time intervals, which are indicated in the test instructions. After the designated reaction time has elapsed, the color on each pad is compared to the reference color chart or key provided with the test kit. This comparison allows for the interpretation of the urine's chemical characteristics and helps in diagnosing various health conditions or monitoring ongoing health issues.

The accuracy of the results depends on careful adherence to the timing instructions and proper comparison with the color chart. By using the urinalysis strip in this way, you can gain valuable insights into your health through a simple, convenient, and non-invasive testing method.