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LaoThe diagnostic test that involves removal of fluid from a joint is called arthrocentesis. This procedure is performed to analyze the fluid for signs of infection, inflammation, crystals, or other abnormalities that can help in diagnosing joint conditions like Arthritis or gout.
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Which diagnostic test involves removing fluid from a joint?
Arthrocentesis is a diagnostic test that involves removing fluid from a joint. It is typically done to analyze the fluid for signs of infection, inflammation, or other underlying conditions causing joint pain or swelling.
Culture - joint fluid?
DefinitionJoint fluid culture is a laboratory test to detect infection-causing organisms in a sample of fluid surrounding a joint.Alternative NamesJoint fluid cultureHow the test is performedA sample of joint fluid is needed. This may be done in a doctor's office using a needle, or during an operating room procedure. For more information on this procedure, see joint fluid aspiration.The fluid sample is sent to a laboratory where it is placed in a special dish and watched to see if bacteria, fungi, or viruses grow. This is called a culture.If such microorganisms are detected, other tests may be done to further identify the infection-causing substance and determine the best treatment.How to prepare for the testThere is no special preparation needed for the lab culture. For information on preparing for the removal of joint fluid, see joint fluid aspiration.How the test will feelThe joint fluid culture is done in a laboratory and does not involve the patient.For information on how the procedure to remove joint fluid feels, see joint fluid aspiration.Why the test is performedYour doctor may order this test if you have unexplained pain and inflammation of a joint or a suspected joint infection.Normal ValuesThe test result is considered normal if no organisms (bacteria, fungi, viruses) grow in the laboratory dish.Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.What abnormal results meanAbnormal results are a sign of infection in the joint. Infections may include:Bacterial arthritisFungal arthritisGonococcal arthritisTurberculous arthritisWhat the risks areThere are no risks to the patient associated with a lab culture. For risks related to the removal of joint fluid, see joint fluid aspiration.ReferencesEspinoza LR. Infections of bursae, joints, and bones. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 293.Ohl CA. Infectious arthritis of native joints. In: Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, Pa: Churchill Livingstone Elsevier; 2009:chap 102.
Joint fluid Gram stain?
DefinitionJoint fluid Gram stain is a laboratory test to identify bacteria in a sample of joint fluid using a special series of stains (colors). The Gram stain method is one of the most commonly used methods to rapidly diagnose bacterial infections.Alternative NamesGram stain of joint fluidHow the test is performedA sample of joint fluid is needed. For information on how this procedure is done, see joint fluid aspiration.The fluid sample is sent to a lab where a small drop is placed in a very thin layer onto a microscope slide. This is called a smear. Several different colored stains are applied to the sample. The laboratory personnel will look at the stained smear under a microscope to see if bacteria are present. The color, size, and shape of the cells help identify the bacteria.How to prepare for the testFor information on how to prepare for the removal of joint fluid, see joint fluid aspiration.How the test will feelFor information on how it will feel when the joint fluid is removed, see joint fluid aspiration.Why the test is performedThe test is performed when there is unexplained swelling, joint pain, and inflammation of a joint, or to check for suspected joint infection.Normal ValuesA normal result means no bacteria are present on the gram stain.Note: Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.What abnormal results meanAbnormal results mean bacteria were seen on the Gram stain. This may be a sign of a joint infection, for example, gonococcal arthritis or arthritis due to Staphylococcus aureus.What the risks areThere is no risk to the patient associated with a Gram stain. For information regarding risks related to the removal of joint fluid, see joint fluid aspiration.ReferencesEspinoza LR. Infections of bursae, joints, and bones. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 293.Ohl CA. Infectious arthritis of native joints. In: Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, Pa: Churchill Livingstone Elsevier; 2009:chap 102.
What diagnostic test removes cerebrospinal fluid with a needle?
A lumbar puncture, also known as a spinal tap, is a diagnostic test that removes cerebrospinal fluid from the spinal canal using a needle inserted between the lumbar vertebrae. This procedure can help diagnose various neurological conditions such as infections, bleeding, and inflammatory diseases affecting the brain and spinal cord.
What is a saline meniscus test?
A saline meniscus test is a diagnostic procedure used to assess the integrity of the meniscus in the knee joint. It involves injecting saline solution into the knee joint to create a meniscus-like bulge. By evaluating the stability and response of this saline meniscus, healthcare providers can gather information about the condition of the knee's meniscus.
