I'm a nursing student and we just took our OB final this morning. There was a question on the test that I'm confused by and I was hoping someone might be able to explain.
Let me preface by saying that when we covered this material, we ran out of time and so we never had lecture on this and we were told that it wouldn't be on the test. It wasn't on THAT test, but it showed up on the final. I guessed, but looking at the book and the notes, I'm not sure what the right answer is.
The question had to do with when to give RhoGam. Two of the four answers were obviously wrong. The other two were: "if both direct and indirect Coombs tests were positive" and "if both indirect and direct Coombs tests were negative."
I guessed both positive (seemed logical in that we hadn't talked about it and since we were told it wouldn't be on the test, I didn't even read about it!). Afterwords, a classmate of mine who works as a tech in OB said that was right, but when I looked at the Powerpoint for that lecture, it says you give it if they're both negative. The book only mentions it in one sentance and it's unclear.
So, which is it? I've read a lot about Coombs testing online and it seems to me that it would be if they were both positive you'd give the RhoGam, but the Powerpoint specifically days to do it if they're both negative. Can someone tell me which is right and explain why?
I'm hoping that they'll throw the question out since they did say it wouldn't be on the test, but I'd still like to know for myself.
When I was in nursing school, the anatomy teacher incorrectly marked an answer of mine wrong. I took the book up to him and showed him why I answered the way I did. He gave me credit for the question.
I asked him if he would give everyone who missed it credit, and he said, "only if they show me why they answered the way they did."
My point is this: find what you can on this, either here (sorry, I don't know the answer) or Google it. If you feel your answer is correct, and the instructor disagrees, you can at least back up your answer.
It's always best to know why the answer is what it is.
Try this link:http://en.wikipedia.org/wiki/Coombs_test
Last edit by KLKRN on Feb 28, '08
: Reason: Added link