Doctor insights on:
Is It Possible To Get A False Positive Alcohol Reading If You Did Not Have Any Alcohol
Yes: If you are refering to urine tests that look for metabolites, it is possible but not likely. Could be excessive use of alcohol based hand sanitizers. One case I'm aware of is using vanilla extract in alcohol base put in coffee, though using it in cooking should get rid of alcohol. Possible using alcohol based mouthwash, should be avoided any way in someone with history of alcoholism. Nyquil. ...Read more
Urine Drug Testing: Nope. Not in any way.Get a more detailed answer ›
Hi...can using hair products containing fruit extracts as well as the alochols used in hair products cause a false positive for etg alcohol tests?
Unless U drink UR: Shampoo, you should not test positive for an alcohol test. That's when you're drinking alcoholic beverages, not using shampoo. So you are safe! Fruit extracts also don't cause a positive alcohol blood test too. Thank goodness! Or we'd have a huge public health crisis on our hands with personal care products. Safe to continue using your fruit extract shampoos. ...Read more
I work in a perfume factory, 40 hours a week. Will exposure to it daily cause a false positive on a alcohol blood test? It spills all over me daily.
Can elderberry trigger a false positive on a UA? I am in recovery for alcohol and submit to regular drug/alcohol screening
Will the sugar alcohol found in sugar free gums, sodas, sugar substitutes produce a false positive on an etg test?
No: There isn't anything in sugar substitutes that will cause the etg (ethyl glucuronide) test to show positive. However, because etg test measures products of metabolism of ethyl alcohol from any source, it is sensitive to small amounts of alcohol. It will detect ingestion or exposure to alcohol in mouthwash, cough syrup and other medicated syrups, and possibly even hand sanitizers. ...Read more
Will over-the-counter medicine for tooth ache that has benzyl alcohol in it cause false positive on 80 hr test I take?
What causes a false positive on an EtG screening test? I have a weekly urinalysis that tested positive for alcohol this week but I did not drink, use any OTC medicine, or mouthwash.
Not certain: All positive drug screens need a confirmatory test and unexplained results can be discussed with the pathologist who supervises the lab. ...Read more
How common (in percentages) are false positive readings on PSA tests (for 40 year old males, if that matters)?
PSA is not absolute.: While PSA is not a perfect test for screening for prostate cancer, it is the only test we have to determine who should have a biopsy of the prostate. Prostate biopsy is the standard for diagnosing prostate cancer. There are always going to be people with low PSA with prostate cancer and people with high PSA's who did not have prostate cancer. Unfortunately, biopsy is the only way to sort this out ...Read more
I was recently told that I am allergic to all grains. Could it be a false positive reading due to a severe reaction I had to cashews a few weeks ago?
Can GI issues cause hypokalemia and false positive Chromogranin and vasoactive intestinal peptides? One high reading one regular reading for both.
GI AND LOW K: Asks if GI "issues" can cause low K? ANS : yes. Vomiting and or diarrhea common causes. Happy to do 2nd opinion and get you back to health. ...Read more
Can an ER cardiac monitor read a false positive of paired & multifocal pvc's? Is it sensitive enough to any movement that would cause that reading?
Possible: A false positive computer read is possible but human interpretation should easily distinguish legitimate pvcs from artifact. ...Read more
Is it possible to get a "false positive" for pseudonormalization on an Echo if everything else is perfectly fine on it?
Careful! What does: "perfectly fine" mean in an industry which calls the central +/- 2 Standard Deviations (central 95.8%) of any human variable "normal" or within "reference range". I strongly suggest getting the video images, study them yourself, work at understanding differences between what you see & what is said about them, etc. Back to first question: complex issues commonly used to explain away inaccuracy. ...Read more
Yes: A contaminated sample or container, an expired strip for example. ...Read more
Is it possible to get a false positive herpes culture test? How often does it occur? What is the reasoning for it?
Rarely if ever: False positive results are very unlikely for HSV culture. If the test was actually a DNA test (PCR test), there is a slightly higher chance of false pos, but still very unlikely. If you have had a positive culture or PCR, for sure you have herpes at whatever site was tested (genital, oral). But if a blood antibody test, not culture or PCR, false positive results are quite common. Good luck. ...Read more
Complex: Hi. It's unlikely "stress" can give a false positive TSH elevation, but "stress" comes in multiple flavors. If a person is severely ill (usually ICU-tpye ill or at least hospitalized), an adaptive response (unfortunately) called "euthyroid sick syndrome" can show a TSH elevation in that range during a phase of the condition. Only in a case like that. Stress like a final exam next week? No. ...Read more
Yes: My pathology colleagues can probably answer this better but a needle aspirate often yields a few isolated cells that may look funky because of the trauma they went through during the procedure. Also, they are taken out of the context of their surroundings and you cannot see the architecture of the tissue. Pathologists are awesome but only god is perfect. ...Read more
Depends: Did you do the test correctly? Was this the only unprotected sex you had? The "positive" test could be the result of earlier sex. You may wish to repeat the test with first morning urine, follow the testing instuctions carefully and do the test 3-4 days after the missed period. ...Read more
FET: Yes and no. There is always a chance of getting a false positive result with urine pregnancy testing. However, with blood testing false positive results are rare. If you mean a false positive due to trigger, then you are correct. There will not be a false positive result from the hcg of the trigger shot. Good luck. ...Read more
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