Biochemical Testing

Why is specimen testing performed?

Results should be accurate, _________, and correctly interpreted

List four scenarios for which testing is employed.

What specimen is most commonly used for analysis?

True or false: haemolysed samples are preferred for analysis.

If a patient is on an IV drip, a _________ site must be used for drawing blood.

List five controllable factors that may impact results.

What factors affecting results are outwith the medical scientist’s control?

______ tubes contain no anticoagulant or preservative, but may have a clot accelerator for serum samples.

Green heparin tubes are suitable for most analyses, with little interference, and they prevent the formation of ________ from fibrinogen.

Purple ethylenediaminetetraacetic acid (EDTA) tubes chelate _______, and are widely used.

Grey ________ ____________tubes are used in blood glucose measurements; they also inhibit metabolic pathways, and used as a preservative with another anticoagulant, such as potassium oxalate.

______ citrate tubes are used widely for coagulation studies, and can reversibly chelate calcium.

List three fields which must be included on a sample request form.

In specimen identification, ____________ is the technology of choice

For which analysis must the sample be protected from light?

For all serum/plasma samples, separation should ideally be performed within ____ hours of the sample has being taken.

List the four features than an ideal analysis method should have.

__________ indicates that a test will detect even very low levels of a particular analyte.

What term defines a test’s ability to be unaffected by interference?

Normality should be eschewed, in favour of patient results being described as being within, or outwith, the ___________ ________ (reference interval).

Diagnostic methods may also be referred to as ________ methods.

___________ _____________ measures the frequency of a test being positive, when a particular disease is present, a scenario known as a true positive (TP) result

___________ ____________ measures the frequency of a test being negative, when a particular disease is absent (a true negative (TN) result).