A urine temperature strip serves as a straightforward tool to confirm the validity of a urine sample. This non-invasive device is frequently employed in settings such as drug testing to ensure the specimen is fresh and has not been tampered with. It operates by indicating the sample’s temperature.
Applying the Strip
Applying a urine temperature strip involves a few precise steps to ensure an accurate reading. Most temperature strips are self-adhesive and designed to be placed on the outside of a clean, dry urine collection container. Position the strip horizontally on the container, near the bottom, where the liquid level will cover the temperature-sensitive area. It is important to apply the strip immediately after the urine has been collected.
The strip’s design allows it to react to the sample’s heat through the container wall. Once affixed, ensure the strip is flat against the surface without any air bubbles that could interfere with the heat transfer. This immediate application is important because urine temperature begins to cool rapidly after collection, especially if exposed to cooler ambient temperatures.
Understanding the Temperature Reading
Interpreting the temperature reading on a urine strip involves observing color changes on its surface. Most strips utilize liquid crystal technology, displaying a green indicator to signify the sample is within the expected range. A freshly voided urine sample falls within a temperature range of 90°F to 100°F (32°C to 38°C). This range aligns closely with normal human body temperature, which is approximately 98.6°F (37°C).
If the strip displays a blue color, it indicates a temperature slightly above the marked reading, requiring an addition of 1°F (0.5°C) to the indicated value. Conversely, a tan or brown color suggests the temperature is slightly below the marked reading, meaning 1°F (0.5°C) should be subtracted. Temperatures outside the 90°F to 100°F range, whether too low or too high, can suggest that the sample may have been altered, diluted, or is not fresh. Such deviations raise concerns about the sample’s authenticity.
Tips for Accurate Measurement
Ensuring accurate temperature measurement with urine strips requires attention to several factors. It is important to read the temperature within four minutes of the urine sample being provided. Delaying the reading can lead to inaccurate results as the sample’s temperature will naturally decrease over time.
To prevent contamination, always handle the urine collection container and the strip with clean hands. Avoid touching the temperature-sensitive part of the strip directly. Always check the expiration date on the temperature strip packaging. Store unused strips in a cool, dry, and dark environment, ideally within their original sealed packaging, to maintain their integrity.