HSL Special Coagulation

Requesting additional tests (add on requests)

Under certain circumstances, it is possible to add tests onto samples that are already in the laboratory, but this will depend on sample stability, tube type and, for some tests, there will be timing restrictions. There may not be sufficient specimen to perform the additional tests. Investigations are best performed on fresh primary specimens.

Additional requests may be received by phone or in person (see contact information). As much information as possible should be provided – for example, to which sample should the tests be added. This will minimise the risk of tests being added to the wrong sample, resulting in unnecessary delays to patient management.

Where the laboratory receives a request for an add-on that cannot be fulfilled the user will be notified.