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 95 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
Excellent

ecabral0

  • Member
  • Posts: 310
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Did you know?

Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

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.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

The tone of the nurse-patient introduction sets the stage for the patient interview and patient care The tone of the nurse-patient introduction sets the stage for the patient interview and patient care
A medical assistant helps the physician with a patient. A medical assistant helps the physician with a patient.
Bilateral psoriasis on a patient’s knees. Bilateral psoriasis on a patient’s knees.
Aquamatic pad and heating unit provide dry heat treatment to a patient’s arm. Aquamatic pad and heating unit provide dry heat treatment to a patient’s arm.
Physics: Power, Energy and Time Physics: Power, Energy and Time
Genetic therapy for mice with Duchenne muscular dystrophy Genetic therapy for mice with Duchenne muscular dystrophy
Video: Sigmoidoscopy

For a complete list of videos, visit our video library