Doctor insights on:
False Positive Echo
An echocardiogram (also called an echo) is a type of ultrasound test that uses high-pitched sound waves that are sent through a device called a transducer. The device picks up echoes of the sound waves as they bounce off the different parts of your heart. These echoes are turned into moving pictures of your heart that can be seen ...Read more
Misinformed?: Who told you that your hep c test was false? If you have no viral load that means you cleared an infection. Are you sure you are getting the right advice? ...Read more
Yes, but not common: Yes, just about any study can have false positives, however it is not common with a hida scan. Things which can interfere with the study and cause a false positive include, prolonged fasting(more than 24hrs), very poor liver function, non-fasting state (less than 4hrs), prior surgery to remove the gallbladder, pancreatitis, TPN (total parenteral nutrition). ...Read moreSee 3 more doctor answers
Work up needed: At the very least it may suggest that you have been exposed to tuberculosis. You should visit with your doctor to have questions asked about whether or not you have TB symptoms to suggest infection such as do you have a cough? Unexplained night sweats? Unexplained weight loss, fevers or chills and fatigue? You also need to have a chest x ray performed - since organism is usually inhaled. ...Read moreSee 1 more doctor answer
Can pregnancy blood test give false negative. 3 days late, urine test negative and blood test negative too?
3 hep c antibody screen tests done. First low positive, 2nd two neg. thoughts? Could the two negatives be false negatives?
HIV testing: This depends upon the test employed. They are generally both sensitive and specific but false positive results do occur. This question can be overcome with further testing, the most specific being PCR for HIV RNA. You should be seen by an expert in the management of HIV disease. ...Read more
Positive Ana and dsdna. Retest showed neg ana and dsdna, but low c4. What does the low c4 mean? Were first results false positive?
Complex: sample handling, timing and transport are important, the process is delicate and constitutes multiple steps at different temperatures, and the results are interpreted in context with the clinical picture, just ask your doctor / rheumatologist for interpretation, if just suspicion, observation and follow up are the way to go for many clinicians, wish you wellness ...Read more
Great question: I think dilute urine is the most likely source for false negatives. I am not familiar with other substances outside of the cannabinoid class of compounds (some of the newer synthetics?) that will react with standard immunoassays. If one is concerned, however, about a false positive there is confirmatory testing that can determine for sure whether it was a false positive or not. ...Read more
What do these results mean? Hbsag positive, hbs ab negative, hbeag negative, hbeab positive and hbc ab positive?
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