Sometimes the laboratory may not be able to analyse your sample. This doesn't necessarily arise because you did anything wrong and we will help you to collect a new sample, and let you know what you can do to make sure everything goes to plan the next time.
Here are the common reasons a non-blood sample may fail:
Insufficient Sample – This can happen if the tubes have leaked in transit, or the tubes are under or overfilled. Some samples need several tests performed on them in order to process results. Please make sure you follow the instructions to provide the correct amount of sample for the test you have purchased.
The Sample is too old - If a sample is delayed in the post, it may be too old to be used for testing when it arrives at the lab. We try to limit the time your sample spends in the post by asking that you only send samples on weekdays, avoiding weekends and public holidays. We also provide a tracked postage returns envelope to ensure it reaches the lab as quickly as possible.
If your sample is not labelled correctly - If your sample is not labelled or there is information missing the lab may not be able to use this. Working to strict UKAS guidelines the labs must produce accurate medical records, and a sample without a completed label is not permissible.
Time-specific samples – Some of our tests need to be taken at specific times, such as the cortisol saliva tests. These times are set by the laboratories performing the tests. Taking the samples at the specified times is important to ensure the correct reference ranges can be used to interpret your results.
Contamination – Urine and stool samples can be contaminated if the area is not clean prior to providing a sample or if there is too much blood in the sample. If this occurs we will get in touch and provide you with another kit to repeat your test.
Unsuitable – Some stool and urine samples may be rejected if they are unsuitable for analysis. If this occurs we will offer you a repeat test.