Urine sample temperature serves as an important indicator of a sample’s integrity. Ensuring the correct temperature confirms the specimen is fresh and authentic. This provides a preliminary check for reliable analysis.
The Acceptable Temperature Range
A urine sample is valid if its temperature falls within 90°F to 100°F (32°C to 38°C). This range mirrors the normal internal temperature of the human body, around 98.6°F (37°C). This consistency helps confirm the sample was recently collected and is authentic. This standard range is applied in various testing environments, including clinical and forensic settings, to ensure reliable results. Maintaining a temperature within this window helps prevent sample manipulation.
How to Measure Urine Temperature
Temperature strips are a common method for determining a urine sample’s temperature. These strips are often integrated into collection cups or applied to the exterior of a container. They utilize thermochromic liquid crystals that change color in response to heat, indicating the liquid’s temperature. A green color on the strip indicates the sample is within the acceptable range.
For accurate use, a temperature strip should be read within four minutes of collection. The strip provides an immediate visual display for quick verification. While temperature strips are widely used, other tools like sterile thermometers or digital temperature gauges can also measure urine temperature by submerging the device tip into the sample. Prompt measurement is important to account for natural cooling after collection.
What Happens If the Temperature is Off?
If a urine sample’s temperature falls outside the acceptable range of 90°F to 100°F (32°C to 38°C), it may be flagged as suspicious or invalid. An improper temperature suggests the sample may not be fresh or tampered with. A low temperature might indicate the sample was collected earlier and cooled, or cold water was added. Conversely, a high temperature could suggest heating a non-fresh sample or other manipulation.
When a sample’s temperature is outside the accepted range, it triggers specific protocols. This can result in the sample being rejected or require the individual to provide another specimen. In some regulated contexts, an out-of-range temperature necessitates an observed collection for the follow-up sample. Failure to provide a new, valid sample can have consequences equivalent to a failed test.