Chapter 1: Prothrombin Time (PT)

Question 1

Prothrombin Time (PT) is commonly called?

Answer 1

Protime.

Question 2

Prothrombin Time (PT) and Internationalized Normalized Ratio (INR) tests are used in combination to evaluate?

Answer 2

Bleeding or clotting disorders and to monitor drug therapies (anticoagulants) prescribed to control clotting disorders.

Question 3

Any patient receiving a blood-thinning medication to control clotting, what test should be performed regularly?

Answer 3

Prothrombin Time (PT) and Internationalized Normalized Ratio (INR) tests.

Question 4

How does PT measures, how long it takes the blood to form a clot after treatment with a reagent?

Answer 4

In seconds.

Question 5

The INR is a calculation recommended by the World Health Organization (WHO) to?

Answer 5

Help standardize results among testing labs.

Question 6

The calculation uses the results from the PT and adjusts them according to?

Answer 6

The reagents being used to performed the test.

Question 7

Are Partial Thromboplastin Time (PTT) test are ordered in conjunction with PT/INR?

Answer 7

Yes.

Question 8

Of the approximately 11 different coagulation factors, the PT/INR test is designed to?

Answer 8

Monitor some while the PTT test is designed to monitor others.

Question 9

Ordering PT/INR test together and evaluating the result helps the provider decide?

Answer 9

Which coagulation factors might be insufficient or working improperly.