Lec: Hema 2 Intro (katong docx)

Question 1

Method for controlling infection in which all blood and certain body fluids are treated as if infected with hepatitis B, human immunodeficiency virus (HIV) or other disease producing blood-borne pathogens.

Answer 1

Universal precaution

Question 2

TRUE OR FALSE:

Any skin surfaces that become contaminated with blood or body fluids should be washed immediately. Hands are not necessarily washed upon removal of gloves.

Answer 2

FALSE. Hands must be washed upon removal of gloves

Question 3

TRUE OR FALSE:

During phlebotomy, it is okay to recap the used needles

Answer 3

FALSE

Question 4

All pipetting must be carried out using?

Answer 4

mechanical pipet devices

Question 5

Minimum requirement of decontaminating all the laboratory work benches with appropriate germicide

Answer 5

At least once per shift. Ideal is every after work has been completed

Question 6

Where do you place materials coming in contact with blood or body fluids

Answer 6

Biohazardous waste containers

Question 7

The Medical Technologist most often comes in contact with a patient during?

Answer 7

Blood collection

Question 8

What are the qualities of a good phlebotomist?

Answer 8

Skill, patience, understanding (っ＾▿＾)💨

Question 9

Betadine when used to clean the phlebotomy area will cause some erroneous test results such as?

Answer 9

falsely elevated potassium, uric acid, and phosphorus results

Question 10

Gauze and alcohol prep swabs should be disposed in?

Answer 10

biohazardous wasted containers

Question 11

The puncture site should be cleaned by rubbing vigorously with a pad thoroughly
moistened with?

Answer 11

70% isopropanol (v/v)

Question 12

This should not be routinely used to clean phlebotomy area because contamination
with this substance will cause some erroneous test results

Answer 12

Betadine

Question 13

When vacutainer blood collection system is used, coagulation studies should be the ____ or ____ filled.

Answer 13

second and tube, respectively

Question 14

If only coagulation tests
are ordered, a plain tube should be filled with _____ of blood first and then the
coagulation tube filled.

Answer 14

2-3 mL

Question 15

In special coagulation
procedures, using a two-syringe technique, approximately how many mL of blood should be withdrawn into the first syringe?

Answer 15

2 mL of blood
(✿◠‿◠)

Question 16

When do you remove the tourniquet when phlebotomizing the patient?

Answer 16

Release the tourniquet as soon as the blood enters the first tube (or the syringe, if used).

Question 17

What is the anticoagulation of choice for coagulation studies?

Answer 17

0.109 M sodium citrate
(buffered or nonbuffered)

Question 18

Ratio of blood to anticoagulant

Answer 18

9 parts
blood to 1 part sodium citrate

Question 19

Blood specimens with a high hematocrit will contain?

Answer 19

less plasma

Question 20

Its presence in the anticoagulant maintains a more stable pH

Answer 20

Buffer

Question 21

Whenever a patient’s hematocrit is 55% or higher the amount of sodium citrate in the collection tube should be?

Answer 21

decreased

Question 22

Formula used to
determine the proper amount of sodium citrate.

Answer 22

Amount of sodium citrate= 100 - Hematocrit/ 595 - Hematocrit multiplied with mL of whole blood used

Question 23

This renders the specimen unacceptable for coagulation testing.

Answer 23

presence of a clot (no matter how small)
(^｡^)

Question 24

The specimen should be centrifuged with _____ of obtaining the sample.

Answer 24

1 hour

Question 25

All pipets, test tubes, and reaction cups that come in contact with the test plasma should have a?

Answer 25

“noncontact” surface

Question 26

Why are plasma specimens in a stoppered container at all times? (except when testing)

Answer 26

To prevent loss of CO 2, and a resultant pH change of the plasma

Question 27

For coagulation procedures, If there is to be a delay beyond 2 hours it is advisable to keep the specimen on?

Answer 27

Ice

Question 28

Specimens that are maintained at room temperature are for:

Answer 28

Prothrombin time
Factor VII assay
Platelet function studies

Question 29

This factor may become activated by the cold.

Answer 29

Factor VII

Question 30

This is indicative of a traumatic venipuncture and should not be used for coagulation studies.

Answer 30

Hemolyzed plasma

Question 31

Platelet poor plasma

Answer 31

plasma platelet count less than 15,000/µL

Question 32

This process routinely produces acceptable platelet-poor plasma.

Answer 32

Centrifugation for 15 minutes at 2500 x g

Question 33

Platelet-poor plasma may be stored at?

Answer 33

-40°C or lower for at least several weeks

Question 34

When thawing frozen plasma it should be done rapidly in?

Answer 34

37°C incubator or water bath

Question 35

TRUE OR FALSE:

It is acceptable to refreeze plasma

Answer 35

FALSE. Plasma cannot be refrozen.
＼（＾▽＾）／

Question 36

Temperature for most coagulation studies

Answer 36

37°C.

Question 37

This method requires gentle tilting of the tube back and forth at the rate of about once per second until a fibrin web is formed.

Answer 37

The tilt tube method

Question 38

These procedures employ the use of automation.

Answer 38

Moving probe and Optical density

Question 39

This is formed more slowly and may first appear as very fine fibrin threads.

Answer 39

Prolonged clotting times

Question 40

These have been performed in duplicate and the two numbers averaged for a final result.

Answer 40

Almost all coagulation procedures

Question 41

Drawbacks of double testing:

Answer 41

time-consuming and
expensive.
。ヾ(｡>ｖ<｡)ﾉﾞ。