2007-03-02 21:32:19 · 11 answers · asked by bexbickles 2 in Health ➔ Other - Health
I had a blood test at hospital a month ago, recieved a letter this morning that i have to have another blood sample done as the other sample clotted.
2007-03-02 21:41:16 · update #1
It takes a drop of human blood two minutes to coagulate at room temperature.
The more they take, and the cooler they keep it, and the less it's exposed to air, they can slow the process down for a long time.
2007-03-02 21:36:07 · answer #1 · answered by HunterGreen 3 · 0⤊ 1⤋
The reason they have asked you for a repeat is that the majority of tests done on blood require the blood to be anti-coagulated. The bottles that the blood is put in contain different chemicals designed to do this. If the blood clots either in the tube, or before it gets into it, if a syringe is used. many of the test results are invalid.
A few tests still use clotted blood, this is put in a plain tube, (no anticoagulant.) These take between 5 and 10 minutes to clot.
2007-03-03 06:10:46 · answer #2 · answered by Dr Frank 7 · 0⤊ 0⤋
u know how the tubes all have different colored tops? well, each color has a different substance in it to help w what ever test is going to be performed on that sample. they contain additives that prevent clotting or slow clotting time. some have no additive at all and within minutes it will clot. so, it just depends on which tube ur blood is in.
2007-03-02 21:42:35 · answer #3 · answered by Angie B 3 · 1⤊ 0⤋
depends on what blood test was for.several poss reasons for clotting of sample.
1. May simply be faulty batch of blood bottles where additive didn't prevent clotting.
2 Sample put in wrong bottle!..... It happens
3 Sample damaged in transit to lab.
Whatever reason, nothing to worry about just means another visit to vampire!!!
2007-03-02 22:24:50 · answer #4 · answered by want to walk 2 · 0⤊ 0⤋
I assume that the sample is prevented from clotting by hirudin, an enzyme secreted by leeches which prevents blood clots. Essentially, if people testing the blood don't want it to clot, they have the means to prevent it from clotting.
Just out of curiosity, but what sparked this question?
2007-03-02 21:37:22 · answer #5 · answered by kelaliry 1 · 0⤊ 1⤋
not very long unless the tube they put it in has anticoagulants already in it to help it clot. there is a test called the prothrombin time (PT) or PPT partial prothrombine time they use to determine blood clotting times and factors. on the litttle paper things they use it depends on the amount of blood cotting factors you blood contains.... average is about 40-50 seconds.
2007-03-02 21:57:16 · answer #6 · answered by misspookett 4 · 0⤊ 0⤋
Actually it should only take about 5 days or so. They take the blood out from ur hand and it is quite painful. But a lot of reat and the handiplast should help. If u are feeling unwell or giddy after that i suggest u to go and see a doctor.
2007-03-02 21:35:40 · answer #7 · answered by tay f 2 · 1⤊ 1⤋
no, when blood sample is in closed air tight tube, it is still live blood. if it is open, it would become hard solid.
in addition, if you have blood clot in your circulation, it would be risk of stroke and heart attack in future. please do not forget to see a cardiologist.
2007-03-02 22:05:03 · answer #8 · answered by gadgetki 3 · 0⤊ 0⤋
i wouldnt think it would clot cause its in an air tight container
2007-03-02 21:34:51 · answer #9 · answered by shell25leics 2 · 1⤊ 1⤋
It doesn't take long at all unless there's an anticoagulant in the tube.
2007-03-02 21:42:22 · answer #10 · answered by st3psp8 5 · 0⤊ 1⤋