MIDTERMS MOD 6 UNIT 2

Question 1

The __________ employs a closed system of sample collection, making it the preferred method.

Answer 1

evacuated system

Question 2

This closed system enables blood to be directly collected to a tube minimizing the risk of __________ ________ and allowing ___________________

Answer 2

specimen contamination ; multiple tubes to be collected.

Question 3

This system of collection employs the use of sample tube under a vacuum.

Answer 3

evacuated system

Question 4

The evacuated system has three basic components:

Answer 4

A. Multi-sample needle/ Two-way needle
B. Tube holder/ Adapter
C. Evacuated tubes

Question 5

An organized order of draw must be followed when collecting samples using the ETS to prevent the following: (7)

Answer 5

1. CARRYOVER / CROSS-CONTAMINATION
2. TISSUE THROMBOPLASTIN CONTAMINATION
3. MICROBIAL CONTAMINATION
4. INTERFERENCE WITH ASSAY
5. REMOVAL OF CONSTITUENTS
6. EFFECT ON ENZYME ACTION
7. ALTERATION OF CELLULAR CONSTITUENTS

Question 6

source of more carryover problems than any other additive

Answer 6

EDTA

Question 7

least interference in tests other than coagulation tests because it occurs naturally in blood

Answer 7

Heparin

Question 8

necessary for coagulation tests other than prothrombin time or partial thromboplastin time (since tissue thromboplastin has no significant effect for these tests)

Answer 8

Discard tube

Question 9

This destroys many enzyme

Answer 9

Sodium fluoride