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can a positive plasma give to B patient?
 
 
 
 
已深度思考(用時 43 秒)
 
 

Okay, so I need to figure out whether a person with a positive plasma can donate to a B patient. Let me start by recalling what blood types mean. Blood types are determined by the presence of antigens on the red blood cells. The main ones are A and B antigens. So, Type A has A antigens, Type B has B antigens, Type AB has both, and Type O has neither. Then there's the Rh factor, which is the positive or negative part. Rh-positive means the Rh antigen is present, and Rh-negative means it's not.

 

Now, the question is about plasma donation. Wait, plasma is the liquid part of the blood, right? It contains antibodies. I remember that for blood transfusions, the donor's red blood cells must not have antigens that the recipient's plasma has antibodies against. But plasma is different. When donating plasma, the antibodies in the donor's plasma could react with the recipient's red blood cells. So the compatibility might be the opposite of red blood cell donations.

 

Let me think. For red blood cell donations, a Type O negative is the universal donor because they don't have A, B, or Rh antigens. But for plasma, I think it's the opposite. Plasma from AB donors is considered universal because they don't have anti-A or anti-B antibodies. Wait, no, actually, AB plasma would have neither anti-A nor anti-B, so they can give to any blood type. Whereas Type A plasma has anti-B antibodies, Type B has anti-A, and Type O has both. So, if a plasma donor is Type AB, their plasma can be given to any recipient because there are no antibodies to attack the recipient's red blood cells.

 

But the question is about a positive plasma given to a B patient. So first, let's consider the ABO compatibility. The donor plasma is positive, but Rh factor in plasma... Wait, plasma doesn't have the Rh antigen because that's on red blood cells. So when donating plasma, the Rh factor of the donor (positive or negative) might not matter as much because the plasma itself doesn't carry the Rh antigen. But wait, plasma can contain anti-Rh antibodies if the donor is Rh-negative. So Rh-negative individuals can have anti-D antibodies (if they've been exposed to Rh-positive blood), so their plasma would contain those antibodies. But Rh-positive donors don't have anti-D antibodies because they already have the Rh antigen. So if the donor is Rh-positive, their plasma doesn't have anti-D antibodies, which is safer for Rh-negative recipients, but in this case, the recipient is B patient. Wait, the recipient's Rh factor isn't specified. The question just says "B patient." So maybe the Rh factor of the recipient isn't part of the question, but the donor's plasma is Rh positive.

 

But let's clarify. When giving plasma, the main concern is the ABO compatibility because the plasma contains antibodies. The Rh compatibility is less of an issue for plasma, except that Rh-negative plasma might have anti-D antibodies if the donor was sensitized. But Rh-positive plasma would not have anti-D antibodies. So, for a plasma transfusion, the donor's plasma antibodies should not attack the recipient's red blood cells.

 

So, the recipient is blood type B. Their red blood cells have B antigens. The donor's plasma should not contain anti-B antibodies. Which blood type's plasma doesn't have anti-B? Let's see: Blood type A has anti-B in their plasma. Blood type B has anti-A. Blood type AB has no antibodies. Blood type O has both anti-A and anti-B. So, if the donor is blood type AB, their plasma can be given to any recipient. If the donor is blood type B, their plasma has anti-A, which would be okay for a B recipient because the recipient's red cells have B antigens, and the donor plasma has anti-A, which would attack A cells but the recipient's cells are B. So, as long as the donor plasma's antibodies don't match the recipient's antigens, it's okay.

 

Wait, no, actually, the donor's plasma antibodies must not be against the recipient's red blood cell antigens. So if the recipient is type B (has B antigens), the donor's plasma must not have anti-B antibodies. So which plasma types have anti-B? Type A and Type O. So donors who are Type B or AB would have plasma that is safe for a B recipient. Because Type B plasma has anti-A, which won't attack B cells. Type AB plasma has no antibodies, so that's safe. Type A and O plasma have anti-B, which would attack the B recipient's cells. Therefore, a B or AB donor's plasma can be given to a B recipient.

 

Now, the question is about a positive plasma donor. Since the donor is Rh-positive, their plasma doesn't have anti-D antibodies. If the recipient is Rh-negative, the Rh factor isn't an issue for plasma because the plasma doesn't have the Rh antigen. However, if the recipient is Rh-negative and the donor plasma has anti-D (if the donor was Rh-negative), that could be a problem. But since the donor is Rh-positive, their plasma doesn't have anti-D. Therefore, the Rh factor here is probably not an issue. So the key is the ABO compatibility.

 

So putting it all together: If the donor is Rh-positive (which means their plasma doesn't have anti-D) and their ABO blood type is either B or AB, then their plasma can be given to a B patient. If the donor is type A or O, their plasma has anti-B antibodies, which would attack the B patient's red blood cells, so that's not allowed.

 

But the original question is, "can a positive plasma give to B patient?" The phrasing is a bit unclear. It might mean, can a person with Rh-positive plasma (i.e., the donor is Rh-positive) donate plasma to a B patient? But the ABO compatibility is more important here. The donor's ABO type must be compatible. So if the donor is, say, B positive or AB positive, then yes, their plasma can be given to a B patient. If the donor is A positive or O positive, then no, because their plasma contains anti-B antibodies.

 

But the question doesn't specify the donor's ABO type, only their Rh type. That's a problem. The original question is incomplete. It asks if a positive plasma (Rh-positive) can be given to a B patient. But without knowing the donor's ABO type, we can't fully answer. However, maybe the question is implying that the donor is B positive. Wait, maybe the user made a typo or shorthand. If the donor is B positive, then their plasma (being B) has anti-A antibodies, which is safe for a B patient. So yes, a B positive donor's plasma can be given to a B patient, regardless of the patient's Rh status, as long as the plasma doesn't contain antibodies against the patient's red cells.

 

Alternatively, if the donor is AB positive, their plasma is also safe. But if the donor is A positive or O positive, then their plasma is not safe. So the answer depends on the donor's ABO type. But since the question only mentions "positive plasma," which refers to Rh-positive, but doesn't specify ABO type, perhaps the user intended to ask if Rh-positive plasma is compatible. But in plasma donations, the Rh factor is less critical than the ABO compatibility. The key issue is the ABO antibodies in the donor's plasma.

 

So the answer should be that a positive (Rh-positive) plasma can be given to a B patient only if the donor's ABO blood type is compatible. Specifically, the donor must be either type B or AB to avoid anti-B antibodies in the plasma. The Rh factor of the donor (positive) doesn't affect the plasma compatibility in this case, as long as the donor's plasma doesn't contain anti-D antibodies (which Rh-positive donors don't have). Therefore, if the donor is B positive or AB positive, their plasma can be given to a B patient. If the donor is A positive or O positive, it cannot.

 

But the original question is phrased as "can a positive plasma give to B patient?" Without specifying the ABO type, it's unclear. However, in typical blood banking terms, when someone refers to a plasma donation, the ABO compatibility is the primary concern. So maybe the user is asking if Rh-positive plasma is compatible, but since the Rh factor in plasma isn't about antigens but antibodies, and Rh-positive plasma doesn't have anti-Rh antibodies, it's safe in terms of Rh. However, the ABO compatibility is still necessary. So perhaps the answer is that Rh-positive plasma from a donor with compatible ABO type (B or AB) can be given to a B patient. But if the donor's ABO type is not compatible, then even Rh-positive plasma is not safe.

 

Therefore, the answer should clarify that both ABO and Rh compatibility are considered, but for plasma, the critical factor is the ABO compatibility. Since the question mentions "positive plasma," which is Rh-positive, but doesn't specify ABO, the answer must address both aspects. So, in summary: Yes, a positive (Rh-positive) plasma can be given to a B patient provided that the donor's ABO blood type is either B or AB. The Rh positivity of the donor does not pose a problem for the plasma transfusion as long as the ABO compatibility is maintained.

When considering whether a positive (Rh-positive) plasma can be donated to a B patient, the key factors are ABO compatibility and Rh factor considerations:

  1. ABO Compatibility:

    • Plasma contains antibodies that must not react with the recipient's red blood cell antigens.

    • Type B patients have B antigens on their red blood cells. Donor plasma must lack anti-B antibodies.

      • Safe Donor ABO Types:

        • B or AB: Their plasma contains anti-A (B) or no antibodies (AB), which will not attack B antigens.

      • Unsafe Donor ABO Types:

        • A or O: Their plasma contains anti-B antibodies (A has anti-B; O has both anti-A and anti-B), which would harm the B patient's red blood cells.

  2. Rh Factor Considerations:

    • Plasma itself does not carry Rh antigens. However, Rh-negative donors may have anti-D antibodies (if sensitized), which could affect Rh-positive recipients.

    • Rh-positive donors (the "positive" in the question) do not have anti-D antibodies in their plasma, making their plasma safe for both Rh-positive and Rh-negative recipients in terms of Rh compatibility.

Conclusion:
positive (Rh-positive) plasma can be given to a B patient only if the donor’s ABO type is B or AB. The Rh positivity of the donor does not interfere, but ABO compatibility is critical. If the donor is B or AB (regardless of Rh status), their plasma is safe for a B patient. If the donor is A or O, their plasma is unsafe due to anti-B antibodies.

Final Answer:
Yes, a positive (Rh-positive) plasma can be donated to a B patient provided the donor’s ABO blood type is B or AB. The Rh factor alone does not restrict this donation.

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這下對了,太牛逼了,一個字母的區別都能區分 -伯克希爾哈薩維- 給 伯克希爾哈薩維 發送悄悄話 (14842 bytes) () 01/25/2025 postreply 07:19:06

Wait, I remember, let me think,okay -麻你- 給 麻你 發送悄悄話 麻你 的博客首頁 (33 bytes) () 01/25/2025 postreply 07:29:56

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