Sample Preservation for Coagulation Testing

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What is the main purpose of sample preservation in routine coagulation testing?

To speed up the testing process

To ensure accurate measurement of coagulation parameters (correct)

To increase the volume of samples collected

To reduce the cost of testing

Which phase of coagulation testing is most susceptible to errors, according to the text?

Pre-analytical phase (correct)

Post-analytical phase

Analytical phase

Transportation phase

What is the optimum ratio of anticoagulant trisodium citrate to blood for sample collection?

1:15

1:10

1:9 (correct)

1:5

Which method is NOT mentioned as a way of obtaining specimens during the sample collection phase?

Needle aspiration Signup and view all the answers

What is the primary consequence of errors in the pre-analytical phase of coagulation testing?

Affected measurement accuracy Signup and view all the answers

What is the recommended method for mixing blood with the anticoagulant after collection?

End-over-end inversions Signup and view all the answers

What are the two factors affecting sample transportation mentioned in the text?

Temperature and length Signup and view all the answers

How long can plasma samples for Prothrombin Time (PT) be stored at 2-8°C if immediate testing is not possible?

Up to 24 hours Signup and view all the answers

What is the recommended storage temperature for long-term storage of specimens in the text?

-20°C Signup and view all the answers

Which phase of laboratory testing involves activities related to result interpretation, result verification, and result reporting?

Post-analytical phase Signup and view all the answers

What is the recommended quality control material mentioned in the text for the Sysmex XP-300?

Eightcheck-3WP with three levels: Normal(-N), Low(-L), and High(-H) Signup and view all the answers

In sample analysis using the Sysmex XP-300, what should be done after entering the sample ID?

Set uncapped specimen to sample probe and press the Start Switch Signup and view all the answers

What is the recommended size range for platelets in the RBCs Histograms according to the text?

2-30 fl Signup and view all the answers

What is the term used to refer to the actual number of each type of white blood cells in differential leukocytes count?

Absolute count Signup and view all the answers

What is the method used to analyze the released haemoglobin from cells in the Sysmex XP-300?

Spectrophotometric analysis at 555nm Signup and view all the answers

What is the principle behind the impedance principle of cell counting?

Detection and measurement of changes in electrical resistance produced by cells as they traverse a small aperture Signup and view all the answers

What is the purpose of the pulse height analyzers in the automated hematology analyzer?

To collect and sort pulses according to their amplitude Signup and view all the answers

In which phase of laboratory testing are result interpretation, result verification, and result reporting activities involved?

Post-analytical phase Signup and view all the answers

What are the clinical significance of CBC tests include?

Bone Marrow disorders, Leukemias, Auto-immune disorders Signup and view all the answers

What does the electronic impedance (resistance) principle of cell counting involve?

Applying low-frequency electrical current between two electrodes to measure changes in electrical resistance produced by cells Signup and view all the answers