WK15: Collection, Processing, Preservation of Specimen Flashcards

1
Q

_____ ______ is an important part of the diagnostic test in the clinical laboratory - it detects the viral and bacterial infection

A

Serologic testing

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2
Q

Substitute in case sink is not available in the area

A

Hand rub

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3
Q

how long will it take for a sample to clot?

A

1 hr

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4
Q

What if during the transferring of the sample to another tube, RBCs are disturbed and serum became reddish?

A

re-centrifuge

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5
Q

if specimen testing is delayed refrigerate at ____ C for more than ____ hrs

A

-20C, 72 hours

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6
Q

Common specimen used

A

serum

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7
Q

what specimen is used for rapid testing?

A

plasma, whole blood

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8
Q

interfere with colorimetric results (Falsely increases results)

A

Icteric or turbid sample

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9
Q

emulsion of fat globules that often appears in serum after eating; during digestion

A

Chyle

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10
Q

What should be done to remove chyle from a sample?

A

rim and re-centrifuge

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11
Q

serum appears dark reddish yellow due to high bilirubin

A

icteric

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12
Q

serum appears milky or turbid

A

lipemia

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13
Q

Complement in the body fluids are inactivated by heating for ___C for ____ mins

A

56C, 30 mins

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14
Q

Refers to the process that destroys the complement activity

A

Inactivation

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15
Q

it interferes with the reactions of certain (syphilis) test and complement component (C1q)

A

Complement

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16
Q

volume carried by a macropipette

A

> 1000uL

17
Q

volume carried by a micropipette

A

<1000 uL

18
Q

hollow cylinder which work like a straw and require use of additional suction device (bulb)

A

Non-piston driven vacuum assisted pipettes

19
Q

used for delivering a particular amount of liquid contained between two calibration marks; used when great accuracy is not require

A

Graduated

20
Q

marked and calibrated to deliver only one volume of the specified liquid; dispense the exact amount of liquid with a small drop left behind (specified volume)

A

Volumetric

21
Q

Utilizes a partial vacuum to draw liquid into the tip

A

Air Displacement Pipette

22
Q

Used in viscous, dense, volatile, radioactive, orvcorrosive samples

A

Positive Displacement Pipette

23
Q

used for ELISA which uses wells

A

Multisample pipette

24
Q

difference in the incubation time between the first well pipetted and the last well

A

Delta time effect

25
Q

More accurate and precise results in using a standard solution

A

Forward pipetting

26
Q

Used in high viscosity solution, buffer with detergent, and solutions that foam easily

A

Reverse pipetting

27
Q

reduces the effects of mechanical backlash or slippage of the micrometer gears and assures better accuracy

A

Dial-down technique

28
Q

Pre-wetting increases the _______ within the tip thus, reducing the variation in the sample evaporation

A

humidity

29
Q

Aspirating with the pipette perpendicularly improves accuracy up to ___ % ultramicro to ____%

A

0.5% - 2.5%

30
Q

Immersion depth for 200 -2000 UL

A

3-6mm

31
Q

True or False:

Maintain tip immersion time of 3-5 seconds after aspiration to prevent lack of aspirate

A

False 1-2 secs

32
Q

True or False Withdraw tip slowly, smoothly from liquid source to prevent contamination to sample or reagent collected

A

True