Anticoagulant Therapy Coagulant Times

Question 1

PT

Answer 1

11-12.5 seconds
Therapeutic range for anticoagulant therapy is 1.5-2x the normal value
Critical value > 20 seconds

Question 2

Activated Plasma Thromboplastin Time (aPTT)

Answer 2

30-40 seconds

Critical value > 70 seconds

Question 3

Partial Thromboplastin Time (PTT)

Answer 3

60-70 seconds greater than 100 seconds

Therapeutic range for anticoagulant therapy is 1.5-2 times the normal value

Question 4

INR

Answer 4

0.8-1.1

If client requires anticoagulation, the desired value is increased to approximately 2-3. Critical value > 5

Question 5

Platelets

Answer 5

150,000-400,000/m3

Critical value less than 20,000 or greater than 1 million/mm3