Why does a doctor send a urine drug test to a lab instead of looking at the results?

Answers (3)

30 Apr 2013

Be glad he does. The ones done in the office are very unreliable

Votes: +0
jbalbi61 30 Apr 2013

Thank you but I was looking for details.

30 Apr 2013

The test in the lab are much more precise. They are more sensitive and can test for a greater amount of substances. The lab has less of a chance to get a false positive or false negative.Here is what wikipedia says about lab testing:
Laboratory-based drug testing is done in two steps. The first step is the screening test, which is an immunoassay based test applied to all samples. The second step, known as the confirmation test, is usually undertaken by a laboratory using highly specific chromatographic techniques and only applied to samples that test positive during the screening test.[23] Screening tests are usually done by immunoassay (EMIT, ELISA, and RIA are the most common). A "dipstick" drug testing method which could provide screening test capabilities to field investigators has been developed at the University of Illinois.[24]

Expand...

Votes: +1

30 Apr 2013

they do this because the test that they do in their office are just a preliminary, quick test and they aren't as accurate as the test that are done in a lab.
(Please excuse my spelling, lol )
Hope my answer helps!
~~happybrandee~~

Votes: +0

Search for questions

Still looking for answers? Try searching for what you seek or ask your own question.

Similar questions

Why would oxycodone show up in a urine drug test if I haven't taken any?

I went to the doctor today ... i had 2 take a urine test... i guess it test for more than one pain me it came back showing i had oxycodone in my ...

5 answers 10 Apr 2011

What would cause my urine test that was lab tested to show positive for alcohol?

I am tested 3x a week for drug court. I have had no problems until they recently started sending our urine to the lab instead of dip sticking it. ...

2 answers 28 Jul 2011

Why would Oxycodone show on a urine test when all I take is Hydrocodone?

My doctor did a drug screen on me in his office and said that I had Oxycodone in my system but I know for a fact the only medicine I took was the ...

4 answers 11 Oct 2011

Will Roxicodone show up in a urine test that is sent into a lab from a rehab facility?

At first they did the 5 panel test and no opiates were found, but then they send it all in to get #'s of how much thc, etc is in the urine so ...

3 answers 7 Jan 2012