When I had a blood test,the vein wouldnt let anymore blood out,so wasnt able to fill the tube. why is this?

Question

When I had a blood test,the vein wouldnt let anymore blood out,so wasnt able to fill the tube. why is this?

Answer 1

maybe your dead? check for a pulse.

Answer 2

The vein may have collapsed at the puncture site, or the needle was against or within the vein wall, or the needle may have slipped out of the vein altogether.

Answer 3

The reason is becos our blood isnt thatt pure as water.

Once the nurse inject on you and taking out blood, if too much or too less into ur vain, it will flow slow and sooner, thick blood cell will form and block it from flowing out.

As for the Doctor above my post says that he never heard of this be4???

Try ask the HSA as im a blood donor.

inexperience nurse always faces this problem and that happen to me too when a newly nurse on duty while in HSA of SIngapore..

Reason, overshoot my vein.........

Need not worry much buddy.

Answer 4

You're a vampire and there's no blood in your veins.

Sorry.

Answer 5

This happens lots - It's nothing to worry about  

Answer 6

could be a minor blood clot, or even an unknown symptom, im a full time blood transfusion doctor and ive never heard of this before

Answer 7

It could be for many different reasons:

1.) Sometimes when a needle is stuck into a vein, the vein spasms and "clamps down," so to speak.

2.) Sometimes when the needle is inserted, the bevel (open part) can get stuck against the wall of the vein.  It makes a tight seal, making it impossible for any blood to get through.

3.) How "good" your veins are also depends on how hydrated you are.  If you're dehydrated, there isn't a lot of fluid flowing through your veins, so they'll be flat and hard to access.  (On the other hand, pregnant women have GREAT veins because their circulating volume is increased.  I got a lot of great phlebotomy experience during my ob/gyn rotation.)  :-)

Hope this helps

Answer 8

im not a docter

Answer 9

One possibility is that your blood is "too dense" (too much red blood cells) making it less viscous. Or you may be polycythemic

Answer 10

The answers about the veins going into 'spasm' are correct. Surprising that your phlebotomist didn't try elsewhere to get a sample though.

Answer 11

you are dead... Hahaha

Answer 12

I am a very bad stick and this happens to me all the time.  I dont exactly know why, but I have always been told its nothing to worry about. (Im a cancer patient, so I see docs quite often)

The person who says they have never heard of that is full of bs.