Tuesday, November 24, 2009

Blood types, genetics, and mistakes

EDITED to ADD: This genetic guessing may be wrong, given information we have since learned. I still hope to get a full explanation when we return to the hospital.//


We did do directed donations, both of us. Hospital calls me yesterday to say they didn't do the cross and type last week; someone made a mistake and didn't order it when we went to the lab. So we already knew it was being done this morning. They took the blood, and an hour later they asked us twice if Zyle had had any transfusions. And re-took blood. And did their thing while we waited. Then sent us home.



I'm giving myself a crash course in genetics again. It's been a long time and I was never a scientist to begin with. Any scientists (MOM?) are welcome to comment here:

So if two parents have A+ blood, and they find out their son has an Rh factor that is different than theirs, that must mean that the recessive gene was in both the parents' types. It would look like this:

Dad: + and would have to be Dd
Mom: + and would have to be Dd
Baby: negative and dd

If I recall correctly, that can happen in 25% of cases. Not that Seth and I have ever gone to that level of detail on our blood before, so I'm pretty much guessing at the Dd's.

However, this particular factor is rare enough that the Red Cross was having to get blood from FOUR HOURS AWAY and drive it here for the operation. We weren't given a choice, just told that the hospital couldn't hold the operating room that long. Go home.


Scheduler says surgery won't take place this week. Beyond that, we don't know. The assistant surgeon told us it needs to be done within two weeks. But the scheduler is giving us a date 13 days out as first available and a "maybe." I'm not convinced; still wondering if next week is a possibility.

2 comments:

  1. Hi Pam...so it just happens that this is my line of work, I'm a Marketing Manager for a company that makes blood typing and compatibility reagents. So it sounds like Zyle definitely has the recessive genes for Rh (meaning his red blood cells do not have the Rh antigen on them and his plasma has an antibody to D, or Anti-D). But there's actually more to finding a compatible blood unit than just your blood type. Do you know if Zyle had a positive antibody screen? Feel free to e-mail me if you need more info! Christie Otis (Evan's mom)

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  2. Christie, if you see this ... I sent a message to your work email.

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