Tuesday, April 9, 2013

What kind of blood is given in a transfusion to these 3 patients?

Q. What kind of blood is given in a transfusion to these 3 patients?
Rh-
AB
A+

What type of blood is given to these 3 blood types if they needed a blood transfusion?

A. Blood types such as A+ summarise two different typing systems: ABO (A, B, AB, O) and Rhesus (positive and negative). The two work in similar ways but aren't connected.

In each case the types are determined by whether or not you have a bit of chemical on your blood cells. These 'antigens' can be called A, B and Rh. If you don't have one, you're likely to have antibodies against it. If your blood cells have all three, you're AB+ (short for AB type & Rhesus+), if none you're O-.

So to use that for your questions:

Rh-
This isn't a whole blood type, just the Rh factor without the ABO type. You might give someone with Rh- a negative type, possibly AB-, A- or B- depending on their ABO type. If you didn't know (or you knew they were O-) you'd give them O- as O- is the universal donor (or as close a you get to one - you have to ignore plasma and rare blood types and stuff)

AB
This isn't a whole blood type either. You could give them any ABO type in theory as AB is the universal acceptor (or as close as you get to one... blah-de-blah). If you didn't know whether they were AB+ or AB-, you'd give them AB-, or failing that another negative type.

A+
You'd give them A+, or failing that O+, or failing that O-, but _nothing_else_.


How much blood is taken for a thyroid blood test?
Q. I have to get a blood test to check my thyroid, I think it's a full thyroid panel or something like that. I want to know if it is a lot of blood/many tubes of blood. I tend to pass out if it's a lot of blood, so I want to know. Thanks.

A. Probably two small tubes but it's no big deal. I have had blood taken for thyroid tests for many years, and many more tests for other matters. Try looking at something else and concentrating on that and it will be over in one minute or less.


How long do blood thinners usually take to clear a blood clot in the lungs?
Q. How long do blood thinners usually take to clear a blood clot in the lungs?

A. Blood thinners don't clear the clot. You're body does. The blood thinners just prevent the clot from getting any bigger.

It can actually take quite a while for your body to break up the clot, but the patient usually leaves the hospital after their blood levels stabilize on oral anti-coagulants (blood thinners.)


How unlikely is it that a blood bank analyzes and records your blood type wrong?
Q. I gave blood about a month ago and I just received a donor card stating that my blood type is A negative. My doctor has told me multiple times that my blood type is A positive. Is it more likely that my doctor is wrong or that the blood bank incorrectly recorded my blood type?

A. Very unlikely that the blood bank is wrong, but you probably ought to call them, if you can, and call your doctor.

If you were ever to need a transfusion. the hospital would check a sample of your blood on the spot to make sure they match it correctly.





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