Lab Value Analyzer

  1. 1 Before you begin, use the Drugs and conditions that can affect coagulation reference to eliminate drug-related causes and concomitant conditions that can affect coagulation.

    Platelet antagonists


    Herbal supplements that can affect coagulation:

    • Herbs with potential antiplatelet activity
    • Asian ginseng (Panax quinquefolius)
    • Bilberry (Vaccinium myrtillus)
    • Dong quai (Angelina sinensis)
    • Feverfew (Tanacetum parthenium)
    • Garlic (Allium sativum)
    • Ginger (Zingiber officinale)
    • Gingko (Gingko bilobae)
    • Meadowsweet (Filipendula ulmaria)
    • Siberian ginseng/eleuthero (Eleutherococcus senticosus)
    • Tumeric (Curcuma longa)
    • Willow (Salix alba)
    • Coumarin-containing herbs
    • Chamomile (Matricaria recutita, Chamaemelum mobile)
    • Fenugreek (Trigonella foenum-graecum)
    • Horse chestnut (Aesculus hippocastanum)
    • Motherworth (Leonurus cardiac)
    • Red clover (Trifolium pratense)
    PDF document Drugs and conditions that can affect coagulation reference
  2. 2 Set normal ranges [details]
    Normal ranges vary from lab to lab. Please refer to a lab printout and enter the normal upper and lower ranges for the prothrombin time (PT) and activated partial thromboplastin time (aPTT) assays used in your institution.1 Minimally increased or decreased lab values may be due to lab error and will be treated as normal here. Abnormal lab values should generally be rechecked.2 Please note that labs performed on blood drawn through catheters or after flawed venipuncture technique may provide erroneous results.
  1. 3 Input your patient's lab tests
  2. 4 Submit and receive a list of diagnoses to consider based on the lab values entered

The Lab Value Analyzer is available for one-time use. Be sure to register for unlimited access.

Enter your values for the PT and aPTT lab tests


General lab tests PT and aPTT are required in order to continue.

000 per mcL

Specialty lab tests

Diagnoses to consider

Consider the diagnoses listed below based on the values you entered. Click each diagnosis for more information. Clinical correlation is advised.

Get additional guidance with these resources

1. Konkle BA. Clinical approach to the bleeding patient. In: Colman RW, Marder VJ, Clowes AW, George JN, Goldhaber SZ, eds. Hemostasis and Thrombosis: Basic Principles and Clinical Practice. 5th ed. Philadelphia, PA: Lippincott Williams & Wilkins; 2006:1147-1158.
2. Kessler CM, Khokhar N, Liu M. Consultative Hemostasis and Thrombosis. 2nd ed. Philadelphia, PA: Saunders Elsevier; 2007:17-33.