Partial Thromboplastin Time (PTT) Lab Values Lab Values Podcast by NURSING.com (Nursing Podcast, normal lab values for nurses for NCLEX®) by NURSING.com (NRSNG)

Normal
25 - 35 seconds

Indications
Detection of coagulation disorders Evaluate response to Heparin (PT for Coumadin) Preoperative assessment
Description
Partial Thromboplastin Time (PTT)evaluates the function of factors I, II, V, VIII, IX, X, XI, and XII. PTT represents the amount of time required for a fibrin clot to form. Monitors therapeutic ranges for people taking Heparin.

What would cause increased levels?
Disseminated Intravascular Coagulation (DIC) Clotting Factor Deficiencies: Hypofibrinogenemia Von Willebrand Disease Hemophilia Liver disease: Cirrhosis Vitamin K deficiency Polycythemia Dialysis
What would cause decreased levels?
N/A