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Blood Tests: Los Angeles Driving Under the Influence

blood-test-sobriety.jpgBlood testing by taking a sample from a vein is another method used to attempt to determine a blood alcohol level.

Many people believe that with a blood test, a machine actually tests the blood to determine a blood alcohol concentration.  It may come as a surprise, but blood testing is also an indirect measure of blood alcohol concentration.

The blood sample is placed in a vile.  The vile in turn is placed on a rotating wheel with other samples in a warm wet bath.  The samples are heated and the content of the gases given off are what is analyzed.

A key element in challenging blood testing is to obtain a sample for retest.  It is not uncommon for a retest to find different readings which can make a difference in a case.

Maintenance and calibration issues are also critical issues just as they are in breath testing cases.


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