Hi Dr I had a blood draw recently in a clinic: Music City prep clinic in Nashville USA. I know they use Labcorp as a company to perform the test. Mi test result for HIV was negative (rna hiv test) but later I was concern thinking what if they was some previous blood in the needle they use to take my blood or what if they put some blood there or something and I became really sorry. I have ocd regarding needle’s recently discovered. Dr what you do think about?

Welcome to the Forum. Thanks for your questions I'll be glad to comment.  Despite what your OCD may be telling you, as well as what you may or may not see on the internet, there is no realistic risk of acquiring HIV or any other blood borne infection from having your blood drawn in a professional setting.  There are simply no proven infections acquired in the way you suggest.  The phlebotomists working in professional settings such as Labcorp are highly trained and use non-reusable equipment for drawing blood.---

Dr my blood draw wasn’t on Labcorp was performed at the clinic. For a flebotomisc at the clinic. They send later the samples to labcorp but my blood was taking in the clinic. Music city prep clinic in Nashville that’s why I’m worried 

Thanks for the clarification but this does not change my assessment.  The clinic you mentioned is a professional setting where phlebotomists are carefully trained.  There are no instances of HIV acquired in the manner you are concerned about.  Please don’t worry.  No change in my assessment.  EWH---

In practice if you use a contaminated needle to extract the blood with the vacunaitor to the tubes this would altered the rna hiv results? If there is positive blood in the needle this would result in positive result on the rna test?

Sigh.  This will be my final answer.  Vacutainers are routinely used to draw tests for RNA.  No change in my assessment.  I hope this final answer will allow you to move forward.  EWH---