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Doctor insights on: Test Urine

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Urine (Definition)

Urine is the product of the kidneys, which is produced to eliminate the waste products of metabolism, manage body fluid balance, &maintain acid-base balance. The blood is first filtered by the kidneys, and the composition of the resulting fluid is then altered depending on the body's needs. It is composed of mostly water, and breakdown products from blood cells impart ...Read more


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Dealing with Blood in Urine (Checklist)

Rule out infection as a cause with a urinalysis or culture
once
Ask your doctor to review your medications to identify cause
once
Rule out kidney stones with your doctor
once
If male, schedule a prostate exam
once
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Are STD urine test accurate?

Are STD urine test accurate?

Yes, reliable ...: Yes, it's reliable but less than testing the specimens from vaginal fluid / cervical mucus/fluid, especially for trichomonas. Besides, some 75% & 50% of chlamydia-infected women & men have no symptom respectively. So, all women ...Read more

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Does urine test show std?

Does urine test show std?

Not routine tests: Routine urine testing does not look for stds. However urine can be tested for gonococcal and chlamydia dna which are stds. ...Read more

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Docs, could a blood test or urine test detect chlamydia?

Docs, could a blood test or urine test detect chlamydia?

Testing: Chlamydia tests include a culture that may take 5 to 7 days to grow. A direct fluorescent antibody test looks for antigens. A nucleic acid hybridization test or a nucleic acid amplification test looks for chlamydia dna &enzyme –linked immunosorbent assay. Directing sampling uses fluids from cervix, urethra throat, eye (whichever area is impacted). Urine testing is also possible. ...Read more

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Can a normal urine test detect pregnancy ?

Can a normal urine test detect pregnancy ?

Pregnancy Testing: A normal home pregnancy or in clinic urine test can detect pregnancy. But a normal ua done for other reasons does not test for pregnancy. You need the pregnancy urine test. ...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?

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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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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How do the test strips that doctors have to test urine work?

How do the test strips that doctors have to test urine work?

Good question: Test strips have a number of small pads each 1 is impregnated with chemicals that react with various substances in urine causing little pad to change color. Amount of color change depends upon concentration of substance, acidity & concentration of substance present. 1 pad each 4 specific gravity (concentration), acidity, glucose, protein, ketones, blood, nitrite 4 uti, leucocyte esterase 4 wbcs. ...Read more

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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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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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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