This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A patient is stabilized on warfarin therapy and being monitored using the prothrombin time (PT) ... (Read 65 times)

CQXA

  • Hero Member
  • *****
  • Posts: 546
on: Jun 25, 2018
A patient is stabilized on warfarin therapy and being monitored using the prothrombin time (PT) followed by calculation of the international normalized ratio (INR). The formula for calculating the INR is:
 
  INR = (PTpatient/PTnormal)ISI (where ISI = international sensitivity index)
 
  What is used for the PTnormal?
 
  a. Arithmetic mean PT for the control
  b. Geometric mean PT for the reference population
  c. Arithmetic mean PT as found in a standard reference textbook
  d. Geometric mean PT reported by the manufacturer of the PT reagent being used

Question 2

Once a patient is stabilized on warfarin therapy, how often should he or she be monitored?
 
  a. Once every 6 months
  b. Once every week
  c. Once a year
  d. Once a month


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Expo

  • Sr. Member
  • ****
  • Posts: 351
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: B
The PTnormal is the geometric mean for the PT reference interval determined by the clinical laboratory scientists in the laboratory where the testing is being performed. Using the wrong value in this calculation has led to major reporting errors that have resulted in bad patient outcomes.

Answer to Question 2

ANS: D
Once a patient is stabilized on warfarin therapy, monitoring should continue monthly until therapy is complete. Changes in diet, metabolism, renal function, other drugs being taken, as well as additional factors all change the response to warfarin and may require making dosage adjustments.


CQXA

  • Member
  • Posts: 546
Reply 2 on: Jun 25, 2018
Great answer, keep it coming :)

tranoy

  • Member
  • Posts: 344
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

The nurse can make observations about the patient's general appearance while talking with the p The nurse can make observations about the patient's general appearance while talking with the p
Photo of the neck of a patient with non-Hodgkin’s lymphoma showing the swelling associated with enla Photo of the neck of a patient with non-Hodgkin’s lymphoma showing the swelling associated with enla
The first commercially successful typewriter, manufactured in quantity beginning in 1874, surely fue The first commercially successful typewriter, manufactured in quantity beginning in 1874, surely fue
With fewer men than women in college, is it time to consider affirmative action for men? With fewer men than women in college, is it time to consider affirmative action for men?
Middle adults usually have more time to focus attention on their relationships Middle adults usually have more time to focus attention on their relationships
Video: Sister chromatids of a metaphase chromosome animation

For a complete list of videos, visit our video library