The Student Room Group

Blood test q's

Okay, I had a blood test yesterday, and it was for *everything*. Two q's.
1. I fainted afterwards - this is not normal for me! Any idea why?
2. I got tested for literally everything because the doc wanted to, which was fine by me, but she said something about the HIV affecting my insurance in the future or something. I'm confused. Medical records are confidential aren't they? So how can it affect anything because no one can look at them? And I know I don't have HIV anyway, so it'll come back negative, so surely even if it would have affected it, it can't... if that makes sense.

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Reply 1

If you do not tell the truth on an insurance contract it is void. So despite your health matters being confidential you must honestly fill in insurance forms.

I hope you're ok :smile:

Reply 2

I fainted once when my sister was having an injection... it could be for any number of reasons, and mostly not too bad, so don't worry

Reply 3

1. I fainted afterwards - this is not normal for me! Any idea why?


It's a blood sugar thing. If you got tested for everything the doctor wanted you to I'm assuming they took a lot of blood, so your blood sugar dipped quite low and so you fainted. This nearly happened to me last time (they took 5 vials of blood off me) I didn't faint but I was shaking and sweating and then when I got home I threw up! :wink: Lucky me! I'm meant to have another one soon, and I can tell you I am NOT going! I don't want that all over again!

Reply 4

Luvbug
It's a blood sugar thing. If you got tested for everything the doctor wanted you to I'm assuming they took a lot of blood, so your blood sugar dipped quite low and so you fainted. This nearly happened to me last time (they took 5 vials of blood off me) I didn't faint but I was shaking and sweating and then when I got home I threw up! :wink: Lucky me! I'm meant to have another one soon, and I can tell you I am NOT going! I don't want that all over again!
Well, I doubt they took pints of blood for the tests- 4-5 5cc vials at most. This is hardly going to have an adverse effect on the blood-glucose level now is it?

I mean, come on, when people give blood they lose a lot more blood, and can carry on life as usual even without the free tea and biscuits.

Reply 5

Some people just react badly to it.

Reply 6

L.J
Okay, I had a blood test yesterday, and it was for *everything*. Two q's.
1. I fainted afterwards - this is not normal for me! Any idea why?
2. I got tested for literally everything because the doc wanted to, which was fine by me, but she said something about the HIV affecting my insurance in the future or something. I'm confused. Medical records are confidential aren't they? So how can it affect anything because no one can look at them? And I know I don't have HIV anyway, so it'll come back negative, so surely even if it would have affected it, it can't... if that makes sense.


I'm not sure if it's that insurance companies have access to your medical records, or that they ask you on a questionnaire if you've ever had an HIV test. In the past (I'm not sure if it's changed yet) even being tested meant that people wouldn't insure you because they took it as indicative of "risk-taking behaviour." Absolute crap, but that's the way it was.

As for fainting, it won't be due to the amount of blood taken or anything like that. Maybe it's partly because you've been ill recently and the added stress of blood tests (esp if you don't like them) topped it off?

Reply 7

if u faint, it does not mean much cause u arent going to be fainting everyday.....

Reply 8

The usual question for health insurance is 'have you ever tested positive for HIV'

Reply 9

L.J
Okay, I had a blood test yesterday, and it was for *everything*. Two q's.
1. I fainted afterwards - this is not normal for me! Any idea why?
2. I got tested for literally everything because the doc wanted to, which was fine by me, but she said something about the HIV affecting my insurance in the future or something. I'm confused. Medical records are confidential aren't they? So how can it affect anything because no one can look at them? And I know I don't have HIV anyway, so it'll come back negative, so surely even if it would have affected it, it can't... if that makes sense.

Yes it is normal for you to faint when you had some blood taken out of you dont worry about that.

Reply 10

visesh
Well, I doubt they took pints of blood for the tests- 4-5 5cc vials at most. This is hardly going to have an adverse effect on the blood-glucose level now is it?

I mean, come on, when people give blood they lose a lot more blood, and can carry on life as usual even without the free tea and biscuits.


Well I had 6 vials taken out of me last time!

It's possible that the body went into shock (I'm sure the medics/nurses will correct that!) causing the blood/glucose level to dip and you to faint?

Reply 11

twiga
Well I had 6 vials taken out of me last time!

It's possible that the body went into shock (I'm sure the medics/nurses will correct that!) causing the blood/glucose level to dip and you to faint?


Blood is replaced in the body at a very fast rate, highly unlikely to faint, until it becomes extreme.

Reply 12

6 vials still can't be that much can it? When I last donated blood I gave my blood bag (however much that is) and they took another4 or 5 testtubes because I'm being tested to be a bone marrow donor and it didn't make me feel faint I had my orange squash and penguin and was fine.

Reply 13

twiga
Well I had 6 vials taken out of me last time!

It's possible that the body went into shock (I'm sure the medics/nurses will correct that!) causing the blood/glucose level to dip and you to faint?


Physiologically, the amount of blood, even having 6 vials taken, is minuscule (like, 60ml MAX) and would not cause you to faint, either due to lack of blood sugar or oxygen.

Even giving blood (470ml), unless you are anaemic, is not enough to cause you to faint, as your body's homeostatic mechanisms bring your blood pressure back up right away and increase your fluid volume within a day or so.

Any fainting after blood tests is psychological-related unless you're really anaemic.

Reply 14

how much do they take when you donate blood helenia is there a difference between how much they take or will they only take it when they hit the right amount. I know they always have trouble getting enough out of me because I bleed really slowly?

Reply 15

viviki
how much do they take when you donate blood helenia is there a difference between how much they take or will they only take it when they hit the right amount. I know they always have trouble getting enough out of me because I bleed really slowly?


I think it's 470ml (so a bit less than a pint). At my place they have clever little scales that rock it to mix it at the same time as weighing it. Generally I think you have to make the full donation although partial ones can be used for other stuff e.g. platelets/plasma/research.

Reply 16

this time was better I was just slow so I think i made it but last time it wouldn't come out after a while and I had to have hot patch things on my arm and I think I was still abit short. Oh well at least I won't bleed to death easily.

Reply 17

Helenia
Physiologically, the amount of blood, even having 6 vials taken, is minuscule (like, 60ml MAX) and would not cause you to faint, either due to lack of blood sugar or oxygen.

Even giving blood (470ml), unless you are anaemic, is not enough to cause you to faint, as your body's homeostatic mechanisms bring your blood pressure back up right away and increase your fluid volume within a day or so.

Any fainting after blood tests is psychological-related unless you're really anaemic.


Well that told me :p:

I was fine with mine, I just thought it took a long time cos I didn't realise I was having so much taken lol. Does the same apply to piercings? Every piercing I've had has made me shakey,faint or be sick. I'm just curious as to if it works the same way.

Reply 18

twiga
Well that told me :p:

I was fine with mine, I just thought it took a long time cos I didn't realise I was having so much taken lol. Does the same apply to piercings? Every piercing I've had has made me shakey,faint or be sick. I'm just curious as to if it works the same way.


I think it does give you a shock. i had my first ear piercing done with a needle and it was all lovely. had the gun on the second ones and was sick after.

Reply 19

viviki
I think it does give you a shock. i had my first ear piercing done with a needle and it was all lovely. had the gun on the second ones and was sick after.


Lol it's so embarrassing isn't it! I never went back to Claire's Accessories after throwing up in their bin :redface:

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