Coagulagram Values

Question 1

Fibrinogen

Answer 1

1.5-3.6 g/L

Question 2

Platelet Count

Abnormal platelet count

Answer 2

150-450 x10^9/L

abnormal = <20 000

Question 3

What does INR stand for?

Answer 3

International Normalization Ratio

Question 4

Normal INR?
INR if on anticoagulation therapy?
INR for prosthetic heart valves?
Abnormal INR (contraindication for artline insertion)

Answer 4

0.8-1.2.
2-3.
2.5-3.5
>1.1

Question 5

What does PT stand for and what is it’s normal value?

Answer 5

Prothrombin time - the conversion of prothrombin to thrombin.
10-14 seconds

Question 6

What does PTT stand for and what is it’s normal value?

Answer 6

Partial Thromboplastin Time - the time it takes for clot to form in plasma after Calcium and partial thromboplastin are added.
60-70 seconds (>100 second signifies spontaneous bleeding)

Question 7

What does aPPT stand for and what is it’s normal value?

Answer 7

Activated Partial Thromboplastin Time - a more sensitive version of PTT.
30-40 seconds (>70 signifies spontaneous bleeding)

Question 8

What does TT stand for (also know as TCT) and what is it’s normal value?

Answer 8

Thrombin time or thrombin clotting time - the time it takes to convert fibrinogen to fibrin.
< 20 seconds
*thrombin is the enzyme the converts fibrinogen to fibrin

Question 9

What does ACT stand for and what it it’s normal value?

Answer 9

Activated clotting time - measures the ability of blood to clot.
80-160 seconds