Lactate Dehydrogenase (LDH), Fluid Test: Booking, Price, and Results
About Lactate Dehydrogenase (LDH), Fluid Test
| Field | Value |
|---|---|
| Also Known As | LD, Lactic Dehydrogenase, Lactic Acid Dehydrogenase, LDH Body Fluid Test |
| Sample Type | Body fluid (pleural fluid, peritoneal/ascitic fluid, cerebrospinal fluid, synovial fluid) |
| Fasting Required | No fasting required |
| Report Time | Same day to within 24 hours |
| Recommended For | All genders and ages, as clinically indicated |
| Price | Starting at ₹350 |
What Is a Lactate Dehydrogenase (LDH), Fluid Test?
The lactate dehydrogenase LDH fluid test measures the amount of lactic dehydrogenase, an enzyme, present in body fluids such as pleural fluid (from around the lungs), peritoneal fluid (from the abdomen), cerebrospinal fluid (from around the brain and spinal cord), or synovial fluid (from the joints). Also known as LD or lactic acid dehydrogenase, this test helps doctors assess whether cells in a body cavity have been damaged or are inflamed. The sample used is a body fluid collected by a trained clinician using a procedure suited to the fluid type.
What Does a Lactate Dehydrogenase (LDH), Fluid Test Measure?
The LDH body fluid test analyses a single key marker. Here is what it tells us:
| Parameter | What It Indicates |
|---|---|
| Lactate Dehydrogenase (LDH) | An enzyme that is present in nearly all body tissues. Elevated levels in body fluids indicate cell injury, inflammation, or infection in the surrounding tissue. It is also used to distinguish between different types of fluid build-up (exudative versus transudative effusions). |
LD is particularly concentrated in the heart, liver, muscles, kidneys, lungs, and red blood cells. When cells are damaged, this enzyme leaks out and can accumulate in nearby body fluids, making it a useful indicator of local tissue injury.
Why is a Lactate Dehydrogenase (LDH), Fluid Test Done?
Doctors order this test when they need to investigate the cause of fluid build-up in a body cavity or when they suspect infection, inflammation, or other disease affecting an internal space.
Common Symptoms That May Require This Test
The following symptoms may prompt your doctor to request a lactic acid dehydrogenase fluid test:
- Breathlessness or difficulty breathing
- Abdominal swelling or tenderness
- Swelling and pain in joints
- Persistent fever and chills
- Chest pain
- Severe headache
- Loss of energy
Conditions This Test Can Help Detect
An LDH body fluid test can help identify several conditions. These include:
- Pleuritis (inflammation of the lining around the lungs), peritonitis (inflammation of the abdominal lining), and meningitis (inflammation of the membranes around the brain)
- Exudative effusions, where infection or inflammation causes excess fluid to collect in a body cavity
- Spontaneous bacterial peritonitis or ascitic fluid infection in patients with liver cirrhosis
- Malignant (cancerous) processes, such as high LD levels in effusion fluid, can suggest the presence of cancer
- Bacterial meningitis, where cerebrospinal fluid LDH activity is significantly higher than in viral meningitis
Lactate Dehydrogenase (LDH), Fluid Test for Chronic Disease Monitoring
The LDH fluid test is also used to monitor patients undergoing cancer treatment. Lactic dehydrogenase levels, particularly LDH-5, can indicate how well a patient is responding to radiotherapy or chemotherapy. In patients with malignancies or chronic inflammatory conditions, the test may be repeated at intervals to track how the condition is progressing.
How to Prepare and What to Expect
Preparation for this test depends on the type of body fluid being collected. Your doctor will give you specific instructions based on your situation.
Do You Need to Fast?
No specific fasting is required for the lactate dehydrogenase LDH fluid test. However, your doctor may provide additional instructions before the fluid collection procedure, and you should follow those carefully.
Practical Tips Before Your Test
A few steps will help ensure your sample is collected safely and accurately:
- Tell your doctor about all medications and supplements you are currently taking
- Note that statins, steroids, anaesthetics, and procainamide can falsely raise LD levels
- High doses of vitamin C may cause a falsely low lactic acid dehydrogenase result
- Follow any additional instructions given by your healthcare provider for the specific procedure
Step-by-Step Procedure
The method of sample collection depends on which body fluid is being tested. Here is what to expect in general:
- Your doctor explains the specific procedure to you and obtains your consent.
- The skin over the collection site is cleaned, and local anaesthesia is applied to reduce discomfort.
- For pleural fluid, a needle is guided through the chest wall into the space around the lungs (thoracentesis). For abdominal fluid, a needle is inserted into the abdominal cavity (paracentesis). For cerebrospinal fluid, a needle is inserted into the lower back (lumbar puncture).
- The required amount of fluid is carefully withdrawn.
- The fluid is placed into a sterile container and labelled.
- The sample is sent to the laboratory for analysis, and results are typically available within 24 hours.
Factors That Can Affect Accuracy
Certain factors may influence the reliability of your LDH body fluid test result:
- Contamination of the sample with red blood cells, which contain high concentrations of LD, can falsely raise results
- Haemolysis (breakdown of red blood cells) in the sample may also cause erroneously high readings
- Rare increases in immunoglobulin levels (gammopathy) can affect results
- Certain medications, including anaesthetics, aspirin, alcohol, and some narcotics, may increase LDH readings
Understanding Your Lactate Dehydrogenase (LDH), Fluid Test Results
Results from this test are interpreted alongside other laboratory findings and the patient's clinical picture. The table below outlines the key reference ranges used for different fluid types.
| Fluid Type | Interpretation Criteria | Clinical Significance |
|---|---|---|
| Pleural fluid | LDH in fluid compared to serum LDH ratio above 0.6 | Suggests exudative effusion caused by infection or inflammation |
| Pleural fluid | Pleural fluid LDH above two-thirds of the upper normal serum LDH value | Suggests exudative effusion |
| Peritoneal fluid | LDH above 220 U/L | May suggest secondary rather than spontaneous bacterial peritonitis |
| Cerebrospinal fluid | 10 to 44 IU/L (control group range; mean 31.0 IU/L) | Higher levels suggest bacterial meningitis |
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Note: The standard serum LDH reference range is generally 140 to 280 U/L, but values in body fluids vary by fluid type, the patient's age, and the laboratory performing the test.
Results During Special Conditions
Certain factors can alter your lactic dehydrogenase result and should be disclosed to your doctor:
- Medications such as statins, steroids, anaesthetics, aspirin, certain narcotics, and procainamide can falsely raise LD levels.
- If the sample is contaminated with red blood cells, results may also read higher than expected. Your doctor will consider these possibilities when interpreting your findings.
How to Maintain Healthy Levels
While LDH body fluid results reflect specific clinical conditions rather than everyday lifestyle factors, the following general habits support your overall health:
- Attend all follow-up appointments so your doctor can monitor any changes over time
- Report new or worsening symptoms, such as increased breathlessness, abdominal pain, or headaches, to your doctor promptly
- Follow your doctor's guidance on managing any underlying condition identified through the test
Lupin Diagnostics Lactate Dehydrogenase (LDH), Fluid Test Price and Home Collection
The LDH body fluid test is available at Lupin Diagnostics starting at ₹350, with home collection available for eligible sample types. Prices vary by city, as shown below:
| City | Approximate Price (₹) |
|---|---|
| Indore | ₹350 |
| Mumbai | ₹390 |
| Bengaluru | ₹350 |
| Hyderabad | ₹350 |
| Chennai | ₹350 |
| Kolkata | ₹390 |
| Pune | ₹390 |
| Bhubaneshwar | ₹390 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Home Collection
Lupin Diagnostics offers home collection across cities for applicable fluid tests. All samples are processed in NABL-accredited laboratories by experienced professionals. Your digital report is accessible via email or WhatsApp once ready.
Frequently Asked Questions
The LDH body fluid test helps doctors investigate the cause of fluid build-up in body cavities such as the chest, abdomen, or spinal canal. It is particularly useful for distinguishing between different types of effusions and detecting conditions such as pleuritis, peritonitis, meningitis, and certain cancers.
The collection method depends on which fluid is being tested. Pleural fluid is collected via thoracentesis (a needle into the chest wall), abdominal fluid via paracentesis (a needle into the abdominal cavity), and cerebrospinal fluid via lumbar puncture (a needle into the lower back). Local anaesthesia is used in each case to reduce discomfort.
An exudative effusion forms when infection or inflammation causes the capillary membranes to become leaky, allowing excess fluid into a body cavity. A transudate forms due to systemic conditions such as heart failure or kidney disease. Lactic dehydrogenase levels in the fluid help doctors tell these two types apart.
Light's criteria are a set of measurements used to classify pleural effusions as exudative or transudative. LD is central to this assessment: if the pleural fluid LDH to serum LDH ratio exceeds 0.6, or if the pleural fluid lactic acid dehydrogenase is above two-thirds of the upper normal serum LDH, an exudative effusion is indicated.
Yes. Statins, steroids, anaesthetics, aspirin, and procainamide can all falsely raise LD levels in body fluids. High doses of vitamin C may cause a falsely low result. Always inform your doctor about all medications and supplements before the test.
Discomfort varies depending on the procedure. Local anaesthesia is used during thoracentesis, paracentesis, and lumbar puncture to minimise pain. There is a small risk of discomfort, bleeding, or infection with any invasive procedure, and your doctor will discuss this with you beforehand.
No. The LDH body fluid test cannot pinpoint the exact location or extent of tissue damage on its own. Doctors interpret the result alongside other laboratory tests, imaging, and clinical findings to reach a diagnosis.
Lactate Dehydrogenase (LDH), Fluid Test
