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Doctor insights on: Blood Negative

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Preg test positive but blood test negative missed period?

Preg test positive but blood test negative missed period?

Timing: It is possible that the urine pregnancy test detected HCG that was in the urine even as a pregnancy was failing (impending miscarriage) but by the time a blood test was done, the miscarriage had already occurred and the levels of the HCG pregnancy hormone were cleared. Alternatively, it could have just been a false (+) urine pregnancy test. ...Read more

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Faecal occult blood test positive danger?

Faecal occult blood test positive danger?

Maybe: The fecal occult blood test can be quite sensitive and may show blood in the stool from minor gastritis or esophagitis that is not significant. But, it could also be due to a large polyp or tumor so colonoscopy is always indicated when the fecal occult blood test is positive. Your primary doctor should be arranging this in the near future. ...Read more

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Negative blood test and white milk discharge?

Negative blood test and white milk discharge?

Need more info: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, you did not state what blood test. Were you tested for serum prolactin? How much discharge? Any relation to periods? It would be prudent to discuss it with your doctor. ...Read more

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Positive HIV screener test at blood donation... Negative IFA and Negative NAT... False positive?

Positive HIV screener test at blood donation... Negative IFA and Negative NAT... False positive?

Yes: The initial screening test for HIV is very sensitive, but not very specific. The back up screening tests are much more specific for HIV. ...Read more

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Home pregnancy test was positive but blood hCG came back negative. Ob perform a blood test again. Hcg 750 progesterone 21. Why first hCG was negative?

Home pregnancy test was positive but blood hCG came back negative. Ob perform a blood test again. Hcg 750 progesterone 21. Why first hCG was negative?

Lab error: Presuming the first blood pregnancy test was close to the second, one of them had to be a lab error, probably the first one that was negative. If there is any question about the health of the pregnancy, your doctor can follow the bhcg level to see if it is rising appropriately and obtain an ultrasound when the level is high enough.For more info www.Askyourgynecologist.Org. ...Read more

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Positive HSV culture but negative blood test; should tests be repeated?

Positive HSV culture but negative blood test; should tests be repeated?

Trust the culture: A positive herpes culture is diagnostic of herpes. I don't know why the blood test (antibody) was negative, but it's not used to make a diagnosis, only to determine whether the virus is present. I would trust the culture. ...Read more

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blood test IGG 17.95 positive and IGM 8.50 negative. stool test was negative. do I infect with h.pylori?

 blood test IGG 17.95 positive and IGM 8.50 negative. stool test was negative. do I infect with h.pylori?

Past infection: These results suggest past infection with H. pylori. The blood test can remain positive for years after past infection even if you were treated. The stool test and urea breath test can better detect current infection. The gold standard for testing is a biopsy during endoscopy. https://www.nlm.nih.gov/medlineplus/ency/article/007501.htm ...Read more

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Blood test. Pos for nitrates in urine?

Blood test. Pos for nitrates in  urine?

Not sure: Positive nitrites in the urine is indicative of a urinary tract infection. I am not sure what blood test has to do with it, though. ...Read more

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Hcg 50 positive blood test two negative urine please help.

Hcg 50 positive blood test two negative urine please help.

Recheck blood: You need to have the blood levels checked again. You expect the level to about double in 2 days with a normal pregnancy. ...Read more

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Have missed period from april 2014 and pregnancy blood and urine test negative?

Have missed period from april 2014 and pregnancy blood and urine test negative?

Anovulation: Your ovaries have stopped working. Don't you think it is time to go to the doctor to figure out why? ...Read more

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Period two weeks late, negative hpt, negative blood test?

Period two weeks late, negative hpt, negative blood test?

Late period: Reasons for missed /late periods: low body weight, obesity, marked weight gain or loss, over-exercise such as in endurance athletes, breast-feeding, stress, illness, eating disorders (bulimia or anorexia), travel, hormone irregularities, drug use, medications (i.e., birth control) or med problem (polycystic ovary syndrome or Asherman’s syndrome. #1 reason for missed period is pregnancy. ...Read more

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Positive blood serum pregnancy test June 27. Urine tests still neg. should I be concerned?

Positive blood serum pregnancy test June 27.  Urine tests still neg.  should I be concerned?

June 27? today 6/22: I think you meant 6/17? Serum pregnancy test can detect pregnancy quite a bit earlier than the urine test can... if you tested positive on 6/17 with serum, the urine test should be coming soon.. any question/concern, consult doc. Good luck. ...Read more

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Faint positive HPTs after but less than 2 quantitative test, getting faint positive hpts but negative blood test?

Faint positive HPTs after but less than 2 quantitative test, getting faint positive hpts but negative blood test?

False positive urine: You seems to have false positive urine pregnancy test.Blood test is more sensitive and if it is negative then you can rest assure that you are not pregnant. ...Read more

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What 1+ occult blood negative in urine means?

What 1+ occult blood negative in urine means?

UA: It means you have +1 blood in your urine and the Normal value should be "Negative" so have the hematuria evaluated and worked up by the Doc. Best wishes. ...Read more

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Blood test results showing low mchc?

Low iron: If the MCHC level is below 28%, this is considered too low. The MCHC level can be too low because of blood loss over time, or too little iron in the body. ...Read more

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Postive urine tests and negative blood test and pregnancy symtoms. Could i be pregnant?

Postive urine tests and negative blood test and pregnancy symtoms. Could i be pregnant?

Need to re do test: Blood test is generally more sensitive and reliable than a urine test for pregnancy. You may wish to repeat the urine test as you can do that home. Use first morning urine and follow the instructions for the test carefully. Only do the home test if you are 4-5 days past the expected onset of your period. ...Read more

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Blood tests positive but biopsy and urease test negative for h.pylori. Is this normal?

Blood tests positive but biopsy and urease test negative for h.pylori. Is this normal?

The blood test for: H. Pylori checks for antibodies against the bacterium. Antibodies are proteins that help your body fight off infection and they may be detectable indefinitely, even for a lifetime. Biopsy & urease tests check for presence of an active infection. (+) H. Pylori blood test with negative biopsy & urease suggests you had the infection in the past but that it's not currently active. ...Read more