The pre-op (surgery) blood test includes the three test panels (CBC, CMP, and Prothrombin Time Test) most commonly ordered before a person has surgery. Pre-operative testing is usually done during the few days before the surgery. This panel lets your surgeon know what to be aware of in case of complications during surgery.

This test includes prothrombin time plus INR and it measures how long it takes your blood to clot. It’s used to monitor the effects of the medication warfarin, and can help identify possible hereditary and clotting disorders. This test does not require fasting. Prothrombin Time (PT) is a blood test used in the evaluation of the extrinsic coagulation system; aid in screening for congenital and acquired deficiencies of factors II, V, VII, X, and fibrinogen. This test is used clinically for the therapeutic monitoring of warfarin (Coumadin®) anticoagulant therapy.

The tests are usually ordered for patients prior to surgery to ensure normal clotting ability.  The PT and PTT Blood Tests are useful in the diagnosis of excessive, unexplained bleeding in patients who are not taking blood-thinning medications. These bleeding disorders include conditions such as nosebleeds, bruising, heavy menstrual periods, blood in the stool and/or urine, and bleeding gums, among others,