Lesson 10 - Hemostasis & Blood Coagulation Pt. 1

Question 1

Blood vessels narrow, platelets form plug over wound, coagulation occurs…what is this process?

Answer 1

Hemostasis

Question 2

Complex cascade, blood forms gelatinous clots, fibrinogen converted to fibrin….. what is this process?

Answer 2

Coagulation

Question 3

Protein in blood, converts to fibrin through thrombin, holds platelets together…. what is this?

Answer 3

Fibrinogen

Question 4

What vitamin (s) is essential to coagulation process?

Answer 4

Vitamin K & calcium

Question 5

Sodium citrate are in light blue tubes. Does sodium citrate inhibit or promote blood coagulation?

Answer 5

Sodium citrate inhibits blood coagulation.

Question 6

Hemostasis slows and stops the flow of _______ when injury occurs.
A. blood
B. heparin
C. platelets

Answer 6

A. blood

Question 7

In coagulation, fibrinogen is converted to ________ by thrombin.
A. blood
B. fibrin
C. platelets

Answer 7

B. fibrin

Question 8

The function of fibrin is o hold the ________ together.
A. fibrin
B. blood
C. platelets

Answer 8

C. platelets

Question 9

________ is the blood thinning drug monitored by the aPTT test.
A. INR
B. Protime (PT)
C. Heparin

Answer 9

C. Heparin

Question 10

Which of the following test is calculated using the PT value and is normally 2-3.
A. fibrin
B. heparin
C. INR

Answer 10

C. INR

Question 11

True or false: Warfarin is considered a blood thinner and prevents vitamin K production.

Answer 11

True, also its generic name is coumadin.

Question 12

What reagent is needed for a PT clot test?
A. calcium chloride
B. heparin
C. thromboplastin
D. Both A&C

Answer 12

D. Both A&C

Question 13

How long does (PT) protime tests take to report the results?
A. 50 seconds-1 minute
B. 20-30 seconds
C. 10-13 seconds

Answer 13

C. 10-13 seconds

Question 14

Where do you add the reagent to when performing a partial thromboplastin test?
A. add it to the whole blood
B. add it to the serum
C. add it to the plasma

Answer 14

C. add it to the plasma

Question 15

How long does partial thromboplastin tests take to report the results?
A. less than 10 seconds
B. less than 20 seconds
C. less than 35 seconds

Answer 15

C. less than 35 seconds

Question 16

What is the normal range for an international normalized ratio calculation?
A. therapeutic range of 1-2
B. therapeutic range of 2-3
C. therapeutic range of 3-4

Answer 16

B. therapeutic range of 2-3

Question 17

What is the appropriate point-of-care testing done for the PT/INR tests?
A. INR
B. partial thromboplastin
C. activated clotting time

Answer 17

C. activated clotting time

Question 18

The most commonly performed POCT coagulation test is __________.

a. INR
b. aPTT
c. PT/INR
d. PT

Answer 18

c. PT/INR

Question 19

When using the CoaguChek coagulation analyzer, how much time may elapse from the fingerstick to applying blood to the test strip?

a. 30 seconds
b. 1 minute
c. There is no time limit
d. 15 seconds

Answer 19

d. 15 seconds

Question 20

Which is the first step in the hemostasis process?

a. Blood vessels narrow
b. Fibrin is formed
c. Blood vessels widen
d. Platelets form a plug

Answer 20

a. Blood vessels narrow

Question 21

What is measured by a protime test?

a. Warfarin
b. Time to hemolyze
c. Heparin
d. Time to clot

Answer 21

d. Time to clot