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Doctor insights on: Blood Test Package

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Can pregnancy blood test give false negative. 3 days late, urine test negative and blood test negative too?

Can pregnancy blood test give false negative. 3 days late, urine test negative and blood test negative too?

False negative PG: A false pregnancy test is possible however, in this case you also have a negative blood pregnancy test which is far more accurate. ...Read more

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Does period blood test positive for drugs?

Does period blood test positive for drugs?

Possibly: If you have drugs in your system it could test +. ...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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My metanephrine free urine was 51, blood test was 63, normetanephrine free urine 181, blood test 150- total urine 232, blood test 213. Normal?

My metanephrine free urine was 51, blood test was 63, normetanephrine free urine 181, blood test 150- total urine 232, blood test 213. Normal?

Sounds normal if....: the upper limits for blood metanephrine and normetanephrine are 0.50nm/l and 0.90nm/l. Urinary levels are, respectively: Total 24 hr. metanephrine =1.3mg for urine; and total plasma ME+NME is less than 205pg/ml. It sound as though you're within the normal ranges, but depending on the units of measure, which vary from lab to lab and med ctr to med ctr., you may not. Meet w/ your endocrinologist. ...Read more

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Took 3 pregnancy test. All positive. After urine, red blood and some blood clots. Took another test after, still positive. Please help. First pregnant?

Took 3 pregnancy test. All positive. After urine, red blood and some blood clots. Took another test after, still positive. Please help. First pregnant?

Wait and see: If you continue to have bleeding, see your doctor for a possible blood test to check on pregnancy. Sometimes in early pregnancy, bleeding can be from having sex. If it becomes like a heavy period, it could be a miscarriage. ...Read more

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Can a blood pregnant test show up positive before a urine pregnant test? How early can the blood test show positive?

Can a blood pregnant test show up positive before a urine pregnant test? How early can the blood test show positive?

Yes: A serum ( blood) pregnancy test can be (+) as early as 7- 10 days post conception since it can detect very low levels of the pregnancy hormone beta hcg, the test gets more accurate as the pregnancy advances however. ...Read more

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Do blood and urine tests test for benzodiazepines?

Do blood and urine tests test for benzodiazepines?

Of course: The screening is most often done using a blood or urine sample. These tests are sometimes administrated as part of an investigation for drug use or abuse. ...Read more

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Can home fingerstick blood tests test for hypoglycemia?

Yes: Home kits can measure your blood sugar and are available over the counter or with a presciption. They can test for low blood sugar, aka hypoglycemia. ...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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If bag for babies urine sample was contaminated can high level of white blood cell test be false?Also second bag for culture make test false neg?

If bag for babies urine sample was contaminated can high level of white blood cell test be false?Also second bag for culture make test false neg?

No bags!!: If there is a significant concern for a urine infection in a baby, a bag specimen should never be used. It's akin to pooping on an area before a culture is collected instead of a nice sterile clean sight. The baby should be catheterized with a tiny feeding tube or small cath tube and a truly clean specimen obtained. So many false positives from dirty specimens and then unclear results. ...Read more

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Can you use blood on urine pregnancy test?

Can you use blood on urine pregnancy test?

Yes you can: Many times if there is no urine, your physician or nurse may use your blood for this test. The test is based on color reaction towards the HCG and will tell you positive with a line when the chemical is indeed present. A laboratory run test can then be used to confirm the test if needed. ...Read more

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Does blood contaminate a pregnancy test?

Unclear question: Blood contamination of urine used for pregnancy test may produce unreliable result. ...Read more

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Took blood pregnancy test. Results were <1 mIU/mL. Pregnant or not pregnant?

Took blood pregnancy test. Results were <1 mIU/mL. Pregnant or not pregnant?

Probably "not": A blood betaHCG of < 1mIU/ml is usually considered to be a negative pregnancy test particularly if your period is delayed by 10 to 14 days and the test is performed by a reliable lab....Therefore you are probably not pregnant. Keep in mind that any test can be wrong or inaccurate; fortunately there are very few very rare cases of "false negative blood pregnancy tests." You may want to repeat it. ...Read more

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My blood test for hCG came at <1 but urine test this morning was positive. Is the blood test wrong? What does that mean?

My blood test for hCG came at <1 but urine test this morning was positive. Is the blood test wrong? What does that mean?

Testing for Pregnant: It all depends on when the blood test happened and how many hours or days separated the two. If one was false i would worry more about the urine test. Repeating the blood test once more may be the best next step. ...Read more

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Faint positive hpt w/ first morn urine, neg dr. Urine test later that day, blood test came back post. Why was drs urine test neg? Early testing?

Pregnancy tests: Blood tests are more sensitive than urine tests, especially in early pregnancy. First morning urine is usually more concentrated than urine produced later in the day. Eating and drinking can dilute the urine enough to cause a false-negative result. That is why the blood test is done for confirmation. ...Read more

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