A vitreous aspirate has been collected in an emergency at 9 pm. What advice you like to give to the staff on duty regarding the overnight storage of the sample –
**Core Concept**
The vitreous humor is a clear gel-like substance that fills the center of the eye, making up about 80% of the eye's volume. Storing a vitreous aspirate requires careful consideration to prevent degradation and maintain the integrity of the sample, which is crucial for accurate analysis.
**Why the Correct Answer is Right**
The correct answer is to store the sample at 4°C. This is because bacterial growth is significantly slowed down at this temperature, thereby preserving the sample for analysis the next day. Additionally, storing the sample at 4°C helps to prevent the degradation of proteins and other biochemical components, which can affect the accuracy of the results.
**Why Each Wrong Option is Incorrect**
**Option A:** Storing the sample at room temperature (20-25°C) would allow bacterial growth to occur, leading to sample contamination and degradation.
**Option B:** Freezing the sample would cause ice crystal formation, which can damage the cellular structures and compromise the integrity of the sample.
**Option C:** Storing the sample in a refrigerator at 8°C would not be sufficient to slow down bacterial growth, and the sample may still undergo degradation.
**Clinical Pearl / High-Yield Fact**
When handling biological samples, it's essential to maintain aseptic technique and store them at the correct temperature to prevent contamination and degradation. This is particularly crucial for vitreous aspirates, which may be used for diagnostic purposes, such as detecting glucose levels in diabetic patients.
**Correct Answer:** C.