What's this test for?

This test is ideal if you're experiencing unexplained swelling, fluid buildup, or have had a fluid sample collected from a body cavity like the chest or abdomen. It helps figure out whether that fluid is likely from a simple pressure or fluid-balance issue, or from something more concerning like inflammation, infection, or a growth. It's typically used alongside other fluid tests to help narrow down the underlying cause.

What happens after I get my results?

Your results will show up in your account along with an explanation of what the normal range means for this measurement. Depending on the result, next steps might include additional fluid testing, simple lifestyle changes if the cause is fluid-balance related, or prompt medical attention if the value points to something urgent. You can download the full standard lab report from your account at any time, and if you retest in the future, the trends feature lets you track changes over time.

Who should consider this test?

This test is a good fit for anyone who has had fluid drained from a body cavity, such as the chest, abdomen, or joint, and needs help understanding the source of that fluid. It's often used when someone has noticeable swelling, bloating, or shortness of breath linked to fluid accumulation. It's also useful as part of a broader workup when the cause of fluid buildup isn't yet clear.

What symptoms indicate I may need this test?

Common signs include noticeable swelling in the belly, legs, or around the lungs, unexplained shortness of breath, or a feeling of tightness or fullness in a body cavity. Rapid weight gain from fluid retention or visible fluid on an imaging scan can also be a reason for this test. If a sample of that fluid has already been collected, this test helps classify what kind of fluid it is.

When will I get my results?

Results are typically ready within about 7 days of your sample being received by the lab. You'll get a notification once they're posted to your account so you can log in and review them right away. If your situation feels urgent, don't wait for results — seek medical care immediately.

How can I naturally support healthy fluid balance?

Simple habits like reducing excess salt intake, staying well hydrated, and keeping your legs elevated when sitting for long periods can help ease mild fluid retention. Regular movement, such as walking, helps your body circulate fluid more effectively and reduces pooling. If swelling or fluid buildup is significant or sudden, these steps are not a substitute for prompt medical attention.

What does a high specific gravity result mean?

A higher specific gravity often points toward an exudative fluid, meaning it has more protein and cells, which is usually linked to inflammation, infection, or other active processes in the body. This kind of fluid usually needs closer follow-up to identify the exact cause. The lab report will explain where your specific number falls compared to the typical ranges for each fluid type.

What does a low specific gravity result mean?

A lower specific gravity usually suggests a transudative fluid, which tends to form from pressure or fluid-balance imbalances rather than inflammation or infection, such as those seen with heart or liver conditions affecting fluid regulation. This type of fluid is often less concerning but still worth understanding as part of your overall picture. Simple lifestyle steps like managing salt intake may help if fluid buildup is mild.

What causes abnormal specific gravity in body fluid?

Causes of higher, exudative-type readings include inflammation, infection, or growths affecting the tissue where the fluid collects. Causes of lower, transudative-type readings usually relate to pressure changes in blood vessels or issues with how the body regulates fluid, such as conditions affecting the heart, liver, or kidneys. Because many different conditions can lead to fluid buildup, this test works best combined with other fluid measurements.

How often should I retest?

Retesting frequency really depends on why the fluid was collected in the first place and whether your symptoms change over time. If swelling or fluid buildup returns after treatment, retesting can help confirm whether the situation has improved or changed. Using the trends feature in your account makes it easy to compare results if you test more than once.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

How do I know which test to get?

In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option. Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?

Absolutely! We totally understand that errors can happen. No worries, we're here to help you. Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you. There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out. Our lab requires an address to be listed to generate an order.

Do you accept health insurance?

Only HSA & FSA is accepted. Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts. This policy applies to all insurance companies, including federal health insurance programs like Medicare. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

Can I cancel my order?

Yes. We get it – sometimes your needs change. As long as your samples haven’t been collected yet, we’re happy to help you cancel your order. If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com. You can read more about our cancellation policy here.

How can I find a lab location near me?

During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp). Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

Body Fluid Specific Gravity Test - Fluid Buildup Check

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

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