Instant Test Kit
On Site Collection Devices
In addition to supplying staff for on site sample collection, Laverty Pathology can supply Point of Care (POC) devices for on the spot drug testing. These kits can test for a wide range of drugs of abuse and are designed for urine based drug testing.
Test Principle for On Site Devices
The kits are based on the principle of an immunochemical reaction between a chemically labelled drug (drug protein conjugate) and the drug or drug metabolites that may be present in the urine. The test strip contains a nitrocellulose membrane pre-coated with drug conjugate in the test region and a pad containing coloured antibody colloidal gold conjugate. During the test the urine sample migrates up the membrane and combines with the colloidal gold conjugate. When the drug is absent in the sample the coloured antibody colloidal gold conjugate binds with an immobilised drug protein to form a visible line in the test region. When the drug is present in sufficient concentration this line becomes invisible as the drug binds with the drug protein. Therefore the presence of a line on the test region indicates a negative result for the drug and the absence of a test line indicates a positive result for the drug.
A visible line generated by a different antigen/antibody reaction is also present at the control region of the test strip. This line should always appear, regardless of the presence of drugs or metabolites in the sample. The presence of the control line serves as a built in control that demonstrates that the test has been performed properly.
Click here for Instant Test Kit Form