QUALITY CONTROL
An internal procedure control is included in the test device. A control line must form regardless of the presence or absence of drugs or
metabolites. The presence of the line in the Control region indicates that a proper sample volume has been used. If the line in the Control region
does not form, the test is considered invalid.
To ensure proper kit performance, it is recommended that the test devices be tested once a week or prior to use with external controls. External
controls are available from commercial sources. It is important to make sure the results of the control materials are correct. If they are not the test
results are invalid. Additional controls may be tested according to guidelines or requirement of local state, and/or federal regulations or
accrediting organizations.