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 93 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
Wow, this really help

vickybb89

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

Drug-induced pharmacodynamic effects manifested in older adults include drug-induced renal toxicity, which can be a major factor when these adults are experiencing other kidney problems.

Did you know?

Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

On average, the stomach produces 2 L of hydrochloric acid per day.

Percussion for Ascites: Shifting Dullness, Patient on Left Side Percussion for Ascites: Shifting Dullness, Patient on Left Side
Melodic Intonation Therapy Melodic Intonation Therapy
Patient health history form Cont. Patient health history form Cont.
ROM exercises on a patient’s wrist: extension. ROM exercises on a patient’s wrist: extension.
Nicotine replacement therapy: transdermal patch Nicotine replacement therapy: transdermal patch
A clock is showing the time as exactly 3:00 p.m. and 25 s. A clock is showing the time as exactly 3:00 p.m. and 25 s.
Video: Primate Evolutionary Tree Animation

For a complete list of videos, visit our video library