Blood Collection Techniques

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Questions and Answers

What percentage of blood volume is constituted by the cellular fraction?

35%

45% (correct)

55%

25%

Which type of blood is primarily collected for routine laboratory tests?

Venous blood (correct)

Intermittent blood

Capillary blood

Arterial blood

Capillary blood specimens are typically preferred for which of the following patients?

Infants and very young children (correct)

Adults with stable health

Healthy elderly patients

Patients with chronic diseases

What is the most common vessel from which arterial blood is collected?

Radial artery Signup and view all the answers

What type of blood is formed from the smallest veins and arteries in the body?

Capillary blood Signup and view all the answers

What is the primary purpose of blood collection?

For Bacterial culture, Haematological and Biochemical investigations Signup and view all the answers

Which procedure is primarily conducted with arterial blood specimens?

Arterial blood gas evaluation Signup and view all the answers

What is a common complication when obtaining arterial blood?

Infection at the puncture site Signup and view all the answers

What type of needle is specifically mentioned for blood collection procedures?

Butterfly needle Signup and view all the answers

When capillary blood is obtained, what does it primarily consist of?

A mix of arterial and venous blood Signup and view all the answers

Which condition should be avoided during blood collection to prevent complications?

Counter puncture Signup and view all the answers

Which of the following best defines haematoma in relation to blood collection?

A collection of blood in tissue caused by damaging blood vessels Signup and view all the answers

How can one manage haemophobia during blood collection?

By involving the patient in the process and providing support Signup and view all the answers

What is a key consideration when storing and transporting blood samples?

Temperature Control Signup and view all the answers

What kind of waste is considered biomedical waste?

Medical waste generated from health care facilities Signup and view all the answers

What is the minimum quantity of anticoagulants required per mL for proper blood tests?

0.2 mL Signup and view all the answers

Which vein is primarily recommended for blood collection?

Median cubital vein Signup and view all the answers

What is a contraindicated area for blood draw due to the risk of complications?

Scarred areas Signup and view all the answers

Which of the following supplies is not necessary for blood collection?

Stethoscope Signup and view all the answers

Which type of needle is specifically designed for blood collection and intravenous therapy?

Winged infusion set Signup and view all the answers

When collecting blood, which condition would necessitate avoiding the site?

Presence of a hematoma Signup and view all the answers

What should be done if additional attempts at venipuncture are required?

Bring extra supplies into the patient’s room Signup and view all the answers

Which vein is NOT recommended for venipuncture due to its location?

Medial vein Signup and view all the answers

What is a critical step in preparing for blood collection?

Select an appropriate site and gather supplies Signup and view all the answers

What is a butterfly needle primarily used for?

Obtaining blood samples Signup and view all the answers

Which gauge sizes are commonly found in butterfly needles?

18 to 27 Signup and view all the answers

Why are butterfly needles particularly useful for certain patients?

They are suited for patients with shallow or thin veins. Signup and view all the answers

What angle should a butterfly needle be inserted into the vein?

30-degree angle Signup and view all the answers

What should be done immediately after inserting the butterfly needle correctly?

Wait for blood to fill the vacuum tube. Signup and view all the answers

For which of the following purposes are butterfly needles NOT typically used?

Administering vaccines Signup and view all the answers

What happens when the vacuum tube is full of blood?

The tourniquet should be removed. Signup and view all the answers

Which of the following steps is NOT critical when using a butterfly needle?

Wrapping the butterfly needle in cloth Signup and view all the answers

What can happen if a hematoma forms on the ear cartilage?

The cartilage can shrivel and die. Signup and view all the answers

What condition may arise from excessive bleeding and pressure in muscle compartments?

Compartment syndrome Signup and view all the answers

What is a sign that compartment syndrome may be present?

Pain out of proportion to physical findings Signup and view all the answers

What is trephination used to treat?

Subungual hematomas Signup and view all the answers

Which of the following is NOT a type of hematoma mentioned?

Muscle hematoma Signup and view all the answers

What clinical finding is associated with intra-abdominal hematomas?

Peritonitis Signup and view all the answers

Individuals on anticoagulant medication are more likely to experience which type of hematoma?

Subcutaneous hematoma Signup and view all the answers

Which area of the body is most commonly impacted by compartment syndrome?

Lower leg Signup and view all the answers

Study Notes

Blood Composition and Collection

Cellular fraction of blood volume constitutes 45%.
Venous blood is commonly collected for routine laboratory tests.
Capillary blood is preferable for infants and young children, as well as patients with difficult veins.
Radial artery is the most common vessel for arterial blood collection.
Capillary blood is formed from the smallest veins and arteries.
Diagnosis and monitoring of health conditions is the primary purpose of blood collection.
Arterial blood gas analysis is primarily conducted with arterial blood specimens.
Hematoma formation is a common complication when obtaining arterial blood.
Vacutainer needles are specifically mentioned for blood collection procedures.
Capillary blood mainly consists of arterial and venous blood mixed with interstitial fluid.
Tourniquet application for longer than 1 minute should be avoided during blood collection to prevent complications.
Hematoma refers to a collection of blood under the skin, often caused by blood collection procedures.
Distraction techniques and reassurance are crucial for managing haemophobia during blood collection.
Maintaining appropriate temperature and avoiding light exposure are essential when storing and transporting blood samples.
Blood samples are considered biomedical waste.
10 units of anticoagulants per mL of blood is required for proper blood tests.
Median cubital vein is primarily recommended for blood collection.
Antecubital fossa (elbow crease) is a contraindicated area for blood draw, due to the risk of nerve damage.
Tourniquet is not a necessary supply for blood collection.
Butterfly needles are specifically designed for blood collection and intravenous therapy.
Infections are a condition that would necessitate avoiding the site when collecting blood.
If additional attempts at venipuncture are required, a different site should be chosen and the patient's comfort should be considered.
Cephalic vein is NOT recommended for venipuncture due to its location.
Choosing the proper vein, preparing the venipuncture site, and assembling the necessary equipment are critical steps in preparing for blood collection.
Butterfly needles are primarily used for small vein access and infants and children.
23-27 gauge sizes are commonly found in butterfly needles.
Butterfly needles are particularly useful for fragile veins and patients who are prone to bruising.
Butterfly needles should be inserted into the vein at a 15-30 degree angle.
After correctly inserting the butterfly needle, the tourniquet should be released.
Blood transfusions are not typically performed using butterfly needles.
When the vacuum tube is full of blood, the flow automatically stops.
Using a tourniquet for longer than 1 minute is NOT a critical step when using a butterfly needle.
Hematoma formation on the ear cartilage can lead to disfigurement and infection.
Compartment syndrome is a condition that may arise from excessive bleeding and pressure in muscle compartments.
Pain, numbness, and swelling in the affected area are signs that compartment syndrome may be present.
Trephination is used to treat increased intracranial pressure due to hematoma.
Subdural hematomas are not a type of hematoma mentioned.
Abdominal distension is a clinical finding associated with intra-abdominal hematomas.
Individuals on anticoagulant medication are more likely to experience subcutaneous hematomas.
Forearm is the area of the body most commonly impacted by compartment syndrome.

Hematomas

Hematoma is a collection of blood outside of a blood vessel.
Subcutaneous hematoma occurs under the skin.
Intramuscular hematoma occurs within a muscle.
Intracranial hematoma occurs within the skull.
Intra-abdominal hematoma occurs within the abdominal cavity.
Epidural hematoma occurs between the skull and the dura mater layer of the brain.
Subdural hematoma occurs between the dura mater and the arachnoid mater layers of the brain.
Subgaleal hematoma occurs between the skull and the galea aponeurotica.

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Description

This quiz covers the essential techniques of blood collection, focusing on venous, arterial, and capillary methods. It discusses the components of blood and the specific procedures for drawing blood from different sites. Test your knowledge on best practices and applications in clinical settings.