In-house Blood Tests, Artefacts, and Interferences

Interpretation of test results requires:

An understanding of test limitations

An understanding of potential artefacts

Clinical context

All of the above

What are the categories of laboratory error?

Pre-analytical

Analytical

Post-analytical

All of the above

Which of the following is an example of a Pre-Analytical Error?

Incorrect species written on the request form

Results are sent to the wrong veterinary surgery

Random error (Imprecision) associated with the assay

Incorrect result copied from the in-clinic instrument into the patient record

Which of the following is an example of an Analytical Error?

Incorrect species written on the request form

Results are sent to the wrong veterinary surgery.

Random error (Imprecision) associated with the assay

Incorrect result copied from the in-clinic instrument into the patient record

Which of the following is an example of a Post-Analytical Error?

Incorrect species written on the request form

Severe sample haemolysis

Random error (Imprecision) associated with the assay

Incorrect result copied from the in-clinic instrument into the patient record

What is a common haematology artefact seen with delayed sample analysis?

False low MCV and false low MCHC

False high MCV and false low MCHC

False low MCV and false high MCHC

False high MCV and false high MCHC

Blood film evaluation may reveal the presence of haematologic abnormalities that analysers cannot detect?

True

False

Analytical precision (imprecision) is:

Readjusting the calibration of an instrument

Material with a known concentration of an analyte that is run on the instrument

Estimation of the random error of a laboratory method

Incorrect use of Quality Assurance document information

Knowledge of the method Analytical Precision (Imprecision) is particularly important when results;

Fall within the reference interval

Fall around the upper or lower reference limits

Fall below the reference interval

Fall above the reference interval

Blood film evaluation should be mandatory for every haematology analysis performed?

No

Yes

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In-house Blood Tests, Artefacts, and Interferences