PreOp Surgery Lab Test Panel

Pre Op Surgery Lab Test Panel

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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 in case of complications during surgery.

What are preop labs, and why are they important?

Preop labs are a series of tests conducted before surgery to assess a patient's overall health, identify any preexisting conditions, and determine the risk of complications during and after surgery. These labs are crucial in ensuring the safety and success of the surgical procedure.

Nobody likes to do surgery, but, in some cases, this type of medical procedure is necessary to save your life. Whether it's a complicated operation such as a heart transplant or a simple one such as removing your appendix, it's important to ensure the coagulation ability of your body. Coagulation happens when blood clots are formed to close up wounds and prevent excessive bleeding.

If your body cannot heal cuts successfully, you might experience a lot of health problems after your surgery. This is where pre-op tests come into play. The Prothrombin and Partial Thromboplastin Times are two tests that look at your body's coagulation ability, which is important for preventing excessive bleeding during and after surgery, including the CBC (Complete Blood Count) test. Additionally, an electrolyte panel, also known as a Comprehensive Metabolic Panel (CMP), is often conducted to assess the balance of electrolytes like sodium, potassium, and calcium in the body, as well as a urinalysis to check for any potential kidney issues. An ECG (electrocardiogram) is also typically performed to check the heart's function and identify any potential issues that may affect the surgery. These tests are necessary to ensure that a person is healthy enough to undergo surgery and to identify any potential complications that may arise during or after the procedure, including blood sugar levels for diabetics, white blood cell count, and hematocrit levels. Keep reading to learn more about the importance of blood sugar in pre-op testing and how it can affect surgery and recovery.

What is Prothrombin?

Your liver produces thrombin, a protein that aids in the coagulation process. It is transformed into active thrombin when your blood starts to coagulate. A prothrombin time test is useful to see how quickly your blood coagulates. If the prothrombin time is too long, this means that your body encounters difficulties when healing wounds and cuts.

At the same time, prothrombin needs to be monitored in patients who take blood-thinning medications such as warfarin. This type of medication is administered to people who have a severe coagulation disorder. If your prothrombin time is normal, your body is likely to heal up quickly after surgery, and you have nothing to be worried about.

How Are the PTT Results Interpreted?

As part of your pre-operation tests, you need to do a prothrombin time test and a partial thromboplastin time test. Both tests are required to check your body's coagulation ability, specifically the effectiveness of heparin if it is being administered. The results usually get back to you in just a few business days, and you can interpret them based on reference values you can find online. Your primary healthcare provider will also help you interpret these results.

For example, if both your Prothrombin Time and Partial Thromboplastin Time are prolonged, this usually means that your body lacks important coagulation factors such as I, II, V or X. This can be caused by various health conditions, including serious liver disease. Alternatively, these times can be prolonged because of disseminated coagulation factors in the blood.

If the prothrombin time is prolonged but the partial thromboplastin time is normal, this usually means that your body lacks coagulation factor VII. A lack of vitamin K, severe liver disease, and other medical conditions are all potential causes of this.

In some cases, your prothrombin time might be normal, but your partial thromboplastin time might be prolonged. This means that your body has insufficient VIII, IX, and X coagulation factors, and your wounds will not heal properly. Willebrand disease, lupus anticoagulant, and other issues can cause such a health condition.

Finally, you can also be lucky and have normal coagulation times for your prothrombin and partial thromboplastin. In this case, you benefit from normal coagulation abilities, and your wounds will heal quickly after surgery. Mild deficiencies in coagulation factors might be present in your blood, but they are usually insignificant and don't affect the healing process.

What Causes Bleeding Disorders?

Bleeding disorders are health conditions in which your body bleeds very easily. For example, you might have bleeding gums, heavy menstrual periods, nosebleeds, or experience blood in your stool and urine. These symptoms are not normal, and they usually signify that your blood doesn't have enough clotting factors or doesn't work properly.

For example, prothrombin and other similar substances known as platelets accumulate in places where you have been cut or injured. This is an automatic process that helps to close the wound and prevent infection. A person with a bleeding disorder might not heal up properly, and this can be dangerous.

Different health problems can cause bleeding disorders. For example, serious liver disease or a vitamin K deficiency can cause a bleeding disorder. Some conditions are inherited, such as hemophilia. A deficiency in coagulation factors is the root cause of this condition. It can also affect the internal organs, muscles, and joints.

Blood thinners can also be the cause of bleeding disorders. If you take blood-thinning medication, it's important to do a prothrombin time test to monitor your body's coagulation ability. Fortunately, prothrombin time tests are affordable, and you can easily order them online from reputable vendors.

What Are the Symptoms of Coagulation Disorders?

In rare cases, you might experience certain symptoms of coagulation disorders. It's important to pay attention to these symptoms because they signal your body's reduced ability to heal cuts and injuries. For example, extreme fatigue and blood in the urine or stool might mean that your body lacks key coagulation factors or you're struggling with a more serious health problem.

At the same time, if you bruise easily and cuts or scratches don't heal up quickly, this could also be a sign of a severe coagulation disorder. In some cases, nosebleeds that have no apparent cause accompany these symptoms. You might be dealing with diabetes, autoimmune disorders, or a health problem that limits your body's natural coagulation ability.

Finally, some people also experience sudden pain or warmth in their joints or muscles. A coagulation disorder that results in internal bleeding can also be the cause of this. Double vision or even frequent vomiting may accompany this in some cases. You shouldn't ignore these symptoms, because internal bleeding is never a good sign. Your body is struggling with impaired clotting ability, and you should do something about it as soon as possible.

Order Your PreOp Labs Today!

Ensuring that your blood coagulates well before doing surgery is vital for the success of your operation. These two tests are very important, and you can now order them online without asking your doctor first.

Go to today and get your pre-operation blood tests at an affordable price. These blood labs are accurate; they can be done before any surgery, and you usually get the results back by email in just a few business days.



Prothrombin Time Test and INR (PT/INR): MedlinePlus Medical Test

Partial thromboplastin time (PTT)

Bleeding Disorders -


  1. Go to the "Find a Location" page to find the closest lab location. No need to make an appointment since walk-ins are welcomed. Once you have identified your closest location, go to step 2.

  2. Go to "Choose a Test" and add your selection (s) in the shopping cart. If you prefer to save money on bundled tests, we have created "Lab Test Panels" that can help you decide what to order.

  3. If you have a discount coupon code, add it to your cart.

  4. A $8 lab processing fee will be added to your total.

  5. Pay using a credit card.

  6. You will receive an order confirmation and instructions email on how to download your lab request.

  7. Print lab request form that you downloaded.

  8. Take that form to the closest location. Get your blood drawn.

  9. You will receive an email when the results are ready for you to download.

    Note: You cannot place an order under someone else's profile. The profile person's name will appear on the lab order form.


    If you have further questions, please email [email protected].

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