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Good morning Beth,
This doesn't mean that there is anything wrong with your aunt's blood at all.
This happens quite often when it comes to home care nurses drawing blood. It can be anything from her technique of drawing blood (shaking too much, being on ice too long, difficulty of the blood coming out of the vein due to small veins), to waiting too long to take it to the lab (if she wasn't going directly there), to the lab waiting too long to process it.
Unfortunately she will need to come back to draw the blood again. Make sure she is using butterfly needle (smaller needle).
Ok, so about the blood - if the only purpose of drawing blood was to check for anemia, I would say that it is not necessary to repeat. Like I mentioned before, I really don't think she lost that much blood to make a significant impact on her blood counts. And since she is in hospice, I do not believe they even do transfusions - but believe me, she doesn't need it.
Blood blisters can take several weeks do resolve, the larger it is, the longer it can take. I think keeping it covered is a good idea because they bleed really bad if broken but I don't think you need to put anything on it as, really, nothing will help it go away faster. It needs to dry up on its own. I am glad to hear the seeping has stopped.
Its hard to tell if someone is anemic based on the skin color alone especially if people have some color to their skin (like your aunt). One really has to be anemic (like Hemoglobin of below 9 or 10) before it even shows up on their skin.
Usually with hospice care people are simply made comfortable, nothing aggressive is done. I think transfusion can be an aggressive treatment. But, believe me, your aunt is in no need for such. What seems like a lot of blood loss is really not that much in comparison to how much blood we have. After I had my baby (or I should say during the delivery) I thought I can lost so much blood that I will need a transfusion. I asked the OB who delivered the baby about it (in the delivery room) and she shrugged her shoulders and told me it was nothing. Thankfully, our bodies has an ability to compensate.