Coagulation And Legal Issues

2.

When drawing a blue-top tube, which of the following is correct?

Fill tube to line or vacuum draw.
A ratio of 4.5 mL whole blood to 0.5 mL sodium citrate anticoagulant is required in each tube.
A ratio of 1.0 mL sodium citrate to 9.0 mL whole blood is required in each tube.
A and b are correct
A, b, and c are correct

Correct Answer

A. A, b, and c are correct

Explanation

When drawing a blue-top tube, it is correct to fill the tube to the line or use a vacuum draw. Additionally, a ratio of 4.5 mL of whole blood to 0.5 mL of sodium citrate anticoagulant is required in each tube. Lastly, a ratio of 1.0 mL of sodium citrate to 9.0 mL of whole blood is also required in each tube. Therefore, options a, b, and c are all correct statements.

Rate this question:

3.

Primary hemostasis involves the following steps in the following order.

Platelet aggregation, vasoconstriction, platelet adhesion, and platelet plug formation
Vasoconstriction, platelet aggregation, platelet adhesion, and platelet plug formation
Platelet aggregation, platelet adhesion, vasoconstriction, and platelet plug formation
Vasoconstriction, platelet adhesion, platelet aggregation, and platelet plug formation

Correct Answer

A. Vasoconstriction, platelet adhesion, platelet aggregation, and platelet plug formation

Explanation

Primary hemostasis involves the initial response to blood vessel injury, which includes vasoconstriction to reduce blood flow, followed by platelet adhesion to the damaged vessel wall. Platelet aggregation then occurs, where platelets clump together to form a platelet plug. This plug formation helps to stop bleeding and initiate the clotting process. Therefore, the correct order of steps in primary hemostasis is vasoconstriction, platelet adhesion, platelet aggregation, and platelet plug formation.

Rate this question:

4.

When blood is circulating in the body, the liquid that carries the cells is:

Serum
Saline
Plasma
Water

Correct Answer

A. Plasma

Explanation

Plasma is the correct answer because it is the liquid component of blood that carries red and white blood cells, platelets, and various proteins and nutrients throughout the body. It makes up about 55% of the total blood volume and helps in maintaining blood pressure, regulating body temperature, and transporting waste products. Serum refers to plasma without the clotting factors, saline is a solution of salt in water, and water alone does not contain the necessary components to carry cells in the bloodstream.

Rate this question:

5.

What tubes are necessary for drawing a CBC and PT?

One blue-top tube completely filled
One yellow (SPS) tube completely filled
One lavender tube completely filled
A and c
A and b

Correct Answer

A. A and c

Explanation

To perform a Complete Blood Count (CBC) and Prothrombin Time (PT), the necessary tubes are a blue-top tube and a lavender tube, both completely filled. The blue-top tube is used for coagulation studies, while the lavender tube contains an anticoagulant to prevent blood clotting and is used for hematological tests, including CBC. Therefore, options "a and c" are the correct choices as they include the necessary tubes for both tests.

Rate this question:

6.

Who can give consent to have blood drawn from a 10 year old child?

Physician
Legal guardian
Parent
B and c
A, b, and c

Correct Answer

A. B and c

Explanation

A 10-year-old child cannot give consent for a medical procedure like having blood drawn. Therefore, the legal guardian and parent are the ones who can give consent on behalf of the child. Both the legal guardian and the parent have the authority to make decisions regarding the child's healthcare, including giving consent for medical procedures.

Rate this question:

7.

Who can give consent and assume liability to have a combative 10 year old child restrained while his or her blod is drawn by a phlebotomist?

Parent
Physician
No one
Legal guardian
A and d

Correct Answer

A. No one

Explanation

No one can give consent and assume liability to have a combative 10-year-old child restrained while his or her blood is drawn by a phlebotomist. This is because it is not ethically or legally permissible to force a child to undergo a medical procedure against their will, especially if they are combative. Consent and liability can only be assumed by individuals who have legal authority over the child, such as parents, physicians, or legal guardians. However, in this case, none of these options are suitable as the child is not giving consent and is combative. Therefore, the correct answer is "no one".

Rate this question:

8.

Which of the following would most likely not cause a hematoma?

The needle penetrates all the way through the vein
The needle is only partly inserted into the vein
The needle is removed after the tourniquet is released
Excessive blind probing is used to locate the vein

Correct Answer

A. The needle is removed after the tourniquet is released

Explanation

Removing the needle after the tourniquet is released would not likely cause a hematoma because the tourniquet helps to restrict blood flow and minimize bleeding. Hematomas occur when blood leaks out of a damaged blood vessel and collects in the surrounding tissue. In the given options, the other three scenarios involve potential damage to the vein, such as penetration all the way through, partial insertion, or excessive blind probing, which could lead to a hematoma.

Rate this question:

Coagulation And Legal Issues

What is the proper order of draw? Note: All tubes are plastic with clot activator.

Quiz Preview

When drawing a blue-top tube, which of the following is correct?

Primary hemostasis involves the following steps in the following order.

When blood is circulating in the body, the liquid that carries the cells is:

What tubes are necessary for drawing a CBC and PT?

Who can give consent to have blood drawn from a 10 year old child?

Who can give consent and assume liability to have a combative 10 year old child restrained while his or her blod is drawn by a phlebotomist?

Which of the following would most likely not cause a hematoma?