Blood Collection Processing: Master the Techniques for Accurate Results

Question 1

Which of the following is NOT an anticoagulant used in blood collection tubes?

Accepted Answer

Ethanol

Answer

Sodium citrate

Answer

Heparin

Answer

Potassium oxalate

Question 2

Which action is NOT a critical safety measure during blood collection?

Accepted Answer

Mixing blood samples to increase volume

Answer

Wearing gloves and protective attire

Answer

Disposing of sharp objects properly

Answer

Labeling samples with patient information

Question 3

During venipuncture, which action is crucial for patient comfort and preventing complications?

Accepted Answer

Anchoring the vein below the puncture site

Answer

Applying a tourniquet too tightly

Answer

Reconstituting evacuated blood collection tubes before use

Answer

Inserting the needle with the bevel facing upward

Question 4

What is the main benefit of using a vacutainer system for blood collection?

Accepted Answer

Creates a vacuum to draw blood into the tube

Answer

Prevents contamination of the blood sample

Answer

Ensures the correct ratio of blood to anticoagulant

Answer

Makes it easier to transport blood samples

Question 5

In venipuncture, which technique should be employed to minimize the risk of complications, including hematoma formation and nerve damage?

Accepted Answer

Utilizing a butterfly needle and applying direct pressure to the puncture site

Answer

Inserting the needle at a steep angle and swiftly withdrawing the blood

Answer

Requesting the patient to repeatedly clench and unclench their fist

Answer

Applying a tourniquet and exerting pressure above the puncture site

Question 6

Which of the following is NOT an anticoagulant used in blood collection?

Accepted Answer

Glucose

Answer

Heparin

Answer

Sodium citrate

Answer

Potassium oxalate

Question 7

Why is an anticoagulant added to a blood collection tube?

Accepted Answer

To prevent blood clotting

Answer

To preserve blood cells

Answer

To increase blood volume

Answer

To destroy red blood cells

Question 8

In blood collection, what is the primary function of an anticoagulant?

Accepted Answer

Prevent blood clotting for accurate analysis

Answer

Make blood components more visible under a microscope

Answer

Neutralize acids in the bloodstream

Answer

Keep blood cells alive for longer

Question 9

When selecting a blood collection site, which factor should be the primary consideration?

Accepted Answer

Patient's comfort and vein characteristics

Answer

Patient's age

Answer

Availability of a nearby vein

Answer

Convenience for the phlebotomist

Question 10

What is the main purpose of using an anticoagulant during blood collection?

Accepted Answer

Prevent blood clotting

Answer

Maintain blood cell health

Answer

Improve test accuracy

Answer

Reduce infection risk

Question 11

During blood collection, which step is most critical to prevent sample contamination?

Accepted Answer

Using aseptic technique

Answer

Wearing gloves

Answer

Labeling the sample correctly

Answer

Centrifuging the sample

Question 12

Which of the following is NOT an anticoagulant used in blood collection?

Accepted Answer

Glucose

Answer

Sodium Citrate

Answer

Ethylenediaminetetraacetic Acid (EDTA)

Answer

Potassium Oxalate

Question 13

Which substance is NOT an anticoagulant used in blood collection?

Accepted Answer

Saline

Answer

EDTA

Answer

Heparin

Answer

Citrate

Question 14

Which of the following is NOT a safety precaution that should be taken when collecting blood?

Accepted Answer

Smoke in the blood collection area.

Answer

Wear gloves when handling blood.

Answer

Use aseptic technique when drawing blood.

Answer

Cap the needle immediately after use.

Question 15

When selecting an anticoagulant for a blood specimen, which factor is most crucial to consider?

Accepted Answer

The type of blood test being performed

Answer

The volume of blood being drawn

Answer

The age of the patient

Answer

The gender of the patient

Question 16

Which of the following is NOT an anticoagulant used in blood collection?

Accepted Answer

Glucose

Answer

Sodium citrate

Answer

Ethylenediaminetetraacetic acid (EDTA)

Answer

Potassium oxalate

Question 17

Which blood processing technique is used to separate plasma from red blood cells?

Accepted Answer

Centrifugation

Answer

Coagulation

Answer

Filtration

Answer

Electrophoresis

Question 18

Which substance is NOT an anticoagulant used in blood collection?

Accepted Answer

Glucose

Answer

Sodium citrate

Answer

EDTA

Answer

Heparin

Question 19

In phlebotomy, what's the main reason for spinning a blood sample in a centrifuge?

Accepted Answer

To separate plasma from red blood cells

Answer

To remove air bubbles

Answer

To kill bacteria

Answer

To gather white blood cells

Question 20

To preserve the integrity of a blood sample after collection, which storage guideline is essential?

Accepted Answer

Mix the anticoagulant thoroughly by gently inverting the sample tubes after collection.

Answer

Store blood samples at room temperature to prevent hemolysis.

Question 21

Which blood collection tube is designed to preserve the integrity of blood cells during transport and storage?

Accepted Answer

EDTA tube

Answer

Serum tube

Answer

Plasma tube

Question 22

Which quality control measures are essential for ensuring accurate and reliable blood test results?

Accepted Answer

Following standardized blood collection protocols

Accepted Answer

Using the correct collection tube for the test

Accepted Answer

Properly labeling and documenting specimens

Question 23

To prevent the spread of infections during blood collection, which action is most crucial?

Accepted Answer

Wear personal protective equipment (gloves, mask, gown)

Answer

Use a tourniquet that is too tight

Answer

Recap needles with one hand

Answer

Dispose of sharps in a regular trash can

Question 24

In blood smear analysis, which staining technique is used to differentiate between different types of white blood cells?

Accepted Answer

Giemsa Stain

Answer

Gram Stain

Answer

Sudan Black Stain

Answer

Papanicolaou Stain

Question 25

For accurate microscopic analysis, what is the ideal thickness of a blood smear?

Accepted Answer

Thin and translucent, allowing for clear visualization of individual cells

Answer

Very thick, resembling a thin film of blood

Answer

Thick enough to form distinct clumps of blood cells

Answer

So thin that it is nearly transparent

Question 26

To minimize pain and obtain an adequate blood sample during a capillary puncture, which lancing device is most appropriate?

Accepted Answer

Spring-loaded lancet with adjustable depth setting

Answer

Blunt lancet with shallow puncture

Answer

Sharp lancet with deep puncture

Answer

Finger stick device with firm pressure

Question 27

Which of the following is NOT an anticoagulant used in blood collection?

Accepted Answer

Glucose

Answer

Heparin

Answer

EDTA

Answer

Sodium citrate

Question 28

In blood specimen processing, which device is utilized to separate blood components based on their density?

Accepted Answer

Centrifuge

Answer

Incubator

Answer

Hemocytometer

Question 29

In blood collection, what's the main reason for using anticoagulants in blood collection tubes?

Accepted Answer

Prevent blood clotting and keep it flowing for accurate testing.

Answer

Speed up bacteria growth in blood samples.

Answer

Balance the acidity or alkalinity of blood samples.

Answer

Cause protein denaturation in blood samples.

Question 30

Which of the following is a commonly used anticoagulant in blood collection?

Accepted Answer

Sodium Citrate

Accepted Answer

Heparin

Accepted Answer

EDTA (Ethylenediaminetetraacetic Acid)

Answer

Glucose

Question 31

What is the main reason for using centrifugation in blood sample processing?

Accepted Answer

Separating blood components based on their density

Answer

Mixing blood components evenly

Answer

Removing air bubbles from the sample

Question 32

When processing a blood sample with elevated glucose levels, what immediate action should be taken to prevent false results?

Accepted Answer

Place the sample on ice immediately

Answer

Centrifuge to separate plasma from cells

Answer

Aliquot the sample into smaller vials

Answer

Add an anticoagulant to prevent clotting

Question 33

Which of the following substances is NOT used as an anticoagulant in blood collection?

Accepted Answer

Potassium oxalate

Answer

Sodium citrate

Answer

Heparin

Answer

EDTA

Question 34

During blood processing, what is the main purpose of centrifugation?

Accepted Answer

Separating plasma or serum from red blood cells

Answer

Removing impurities from the sample

Answer

Concentrating cellular components

Answer

Breaking down red blood cells to release hemoglobin

Question 35

In phlebotomy, why is it essential to follow aseptic technique?

Accepted Answer

To prevent contamination and ensure accurate test results.

Answer

To avoid allergic reactions in patients.

Answer

To protect the phlebotomist from infection.

Answer

To minimize patient discomfort.

Question 36

Which of the following is NOT a factor that can influence the accuracy of blood test results?

Accepted Answer

Patient's dietary habits

Answer

Incorrect blood collection technique

Answer

Improper storage temperature

Answer

Time of day the blood is collected

Question 37

What is the main purpose of centrifuging a blood sample?

Accepted Answer

To separate plasma from cells and serum

Answer

To mix the sample more effectively

Answer

To remove air bubbles from the sample

Answer

To prevent blood clotting

Question 38

Which type of blood collection tube should be used for tests that require serum?

Accepted Answer

Red top tube (with clot activator)

Answer

Green top tube (with heparin)

Answer

Blue top tube (with sodium citrate)

Answer

Lavender top tube (with EDTA)

Question 39

What is the ideal storage temperature for most blood specimens?

Accepted Answer

Refrigerated (2-8°C)

Answer

Room temperature (15-25°C)

Answer

Frozen (-20°C or colder)

Answer

Depends on the specific test being performed

Question 40

Which of the following is NOT a common type of blood test ordered by healthcare providers?

Accepted Answer

Urinalysis

Answer

Complete blood count (CBC)

Answer

Lipid profile

Answer

Liver function test

Question 41

What is the correct technique for mixing blood specimens in a collection tube?

Accepted Answer

Gently inverting the tube several times

Answer

Vigorously shaking the tube

Answer

Rolling the tube between the palms

Answer

Do not mix the specimen

Question 42

Which of the following is a sign of hemolysis, indicating that the blood sample has been compromised?

Accepted Answer

Reddish or pinkish plasma

Answer

Clear or yellow plasma

Answer

Cloudy plasma

Answer

Bubbles in the plasma

Question 43

What is the most common cause of blood clot formation in a specimen collection tube?

Accepted Answer

Insufficient vacuum in the tube

Answer

Prolonged collection time

Answer

Patient dehydration

Answer

Incorrect needle size

Question 44

Which of the following is NOT a responsibility of a phlebotomist during blood collection processing?

Accepted Answer

Interpreting test results

Answer

Centrifuging specimens

Answer

Aliquotting specimens

Answer

Labeling specimens

Question 45

What is the primary purpose of using a blood transfer device?

Accepted Answer

To transfer blood from one tube to another without disturbing the specimen

Answer

To mix blood specimens more effectively

Answer

To centrifuge blood specimens

Answer

To aliquot blood specimens

Question 46

In phlebotomy, which trend utilizes technology to improve efficiency and accuracy?

Accepted Answer

Automated blood collection and processing systems

Answer

Manual centrifugation and aliquoting

Answer

Visual inspection of blood samples

Question 47

How do pre-analytical factors like patient posture, tourniquet use, and sample handling affect the accuracy of blood test results?

Accepted Answer

Pre-analytical factors can change blood composition or sample quality, potentially affecting test results.

Answer

Patient posture doesn't matter, but incorrect tourniquet application and sample handling can affect results.

Question 48

How do point-of-care testing (POCT) devices affect the availability and speed of blood test results?

Accepted Answer

Faster results and easier access

Answer

Slower results and harder access

Answer

Easier access but same speed

Answer

Harder access but same speed

Question 49

What is the primary purpose of using a plasma separator tube in blood collection?

Accepted Answer

To separate plasma from red blood cells.

Answer

To mix the blood sample.

Answer

To prevent clotting.

Answer

To increase the volume of the sample.

Question 50

Which of the following temperatures is recommended for storing most blood specimens?

Accepted Answer

4°C (39°F)

Answer

Room temperature

Answer

-20°C (-4°F)

Answer

60°C (140°F)

Question 51

If a blood specimen becomes contaminated, what is the appropriate procedure?

Accepted Answer

Discard the specimen and wear gloves.

Answer

Decontaminate the specimen with bleach.

Answer

Wear a mask and gloves.

Answer

Reconstitute the specimen with sterile water.

Question 52

What is the primary role of the anticoagulant in a blood collection tube?

Accepted Answer

To prevent blood clots

Answer

To extend specimen stability

Answer

To adjust the pH of the sample

Answer

To increase the volume of the sample

Question 53

Which blood test is specifically used to evaluate liver function?

Accepted Answer

Liver function test (LFT)

Answer

Complete blood count (CBC)

Answer

Urinalysis

Answer

Lipid profile

Question 54

Centrifugation of blood specimens is primarily done to:

Accepted Answer

Separate serum from red blood cells

Answer

Remove plasma from cells

Answer

Prevent hemolysis

Answer

Mix the specimen thoroughly

Question 55

What is the optimal storage temperature for most blood specimens?

Accepted Answer

4°C (39.2°F)

Answer

Room temperature

Answer

-20°C (-4°F)

Answer

-80°C (-112°F)

Question 56

Which of the following is NOT a type of blood test?

Accepted Answer

Urinalysis

Answer

Chemistry panel

Answer

Complete blood count

Answer

Coagulation profile

Question 57

For optimal preservation of blood specimens, what is the ideal storage temperature?

Accepted Answer

4°C

Answer

10°C

Answer

15°C

Answer

20°C

Question 58

To maintain quality control in blood collection and processing, which principle is crucial?

Accepted Answer

Adhering to standardized protocols

Answer

Solely relying on internal quality control measures

Answer

Ignoring the importance of proficiency testing

Answer

Assuming all blood samples are handled properly

Question 59

How can a phlebotomist's venipuncture technique impact the quality of a blood sample?

Accepted Answer

Hemolysis, caused by improper technique, can alter test results.

Answer

Venipuncture technique has no bearing on blood sample quality.

Answer

Patient comfort is the primary concern during venipuncture.

Question 60

In phlebotomy, which action is essential to safeguard patient rights and autonomy?

Accepted Answer

Obtaining informed consent

Answer

Maintaining sterile techniques

Answer

Labeling specimens accurately

Answer

Disposing of specimens promptly

Question 61

Centrifugation, a key step in blood processing, primarily aims to:

Accepted Answer

Separate cellular components from plasma

Answer

Homogenize the blood sample

Answer

Remove air bubbles

Answer

Neutralize viruses

Question 62

To preserve the integrity of most blood specimens, the ideal storage condition is:

Accepted Answer

Refrigerated at 4°C

Answer

At room temperature

Answer

Frozen at -20°C

Answer

Under direct sunlight

Question 63

Which blood test is specifically designed to count and assess red blood cells?

Accepted Answer

Complete Blood Count (CBC)

Answer

Urinalysis

Answer

Lipid Profile

Answer

Electrolyte Panel

Question 64

Glycolic acid is NOT a commonly used anticoagulant in blood collection tubes.

Accepted Answer

True

Answer

False