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Doctor insights on: Coombs Test

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Coombs Test (Overview)

Coombs serum is an antibody directed against other antibodies that makes antibody-coated red cells stick together. The direct Coombs test seeks antibodies on a patient's own red cells that may be causing red cell damage and perhaps anemia. The indirect Coombs test is used in blood banking to determine what antigens are present on unknown red cells by seeing what antibodies they bind.


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Hi my Coombs test is positive what I have to do? What is the next step?

Hi my Coombs test is positive what I have to do? What is the next step?

Let me explain: The direct coombs test is used to test for autoimmune hemolytic anemia; ie, a condition of a low count of red blood cells (aka rbcs) caused by immune system lysis or breaking of rbc membranes causing rbc destruction. Follow hematologist direction for the treatment and precautions. ...Read more

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Coombs Test (Overview)

Coombs serum is an antibody directed against other antibodies that makes antibody-coated red cells stick together. The direct Coombs test seeks antibodies on a patient's own red cells that may be causing red cell damage and perhaps anemia. The indirect Coombs test is used in blood banking to determine what antigens are present on unknown red cells by seeing what antibodies they bind.


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Why can't you donate plasma with an abnormal indirect Coombs test result?

Why can't you donate plasma with an abnormal indirect Coombs test result?

Antibody to red cell: A person with positive indirect coombs test has antibodies to red cells. If such plasma is transfused into a person, s/he could suffer loss of her/his own red cells. ...Read more

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What is the definition or description of: Coombs test?

What is the definition or description of: Coombs test?

Red cell antibodies: Coombs serum is an antibody directed against other antibodies that makes antibody-coated red cells stick together. The direct coombs test seeks antibodies on a patient's own red cells that may be causing red cell damage and perhaps anemia. The indirect coombs test is used in blood banking to determine what antigens are present on unknown red cells by seeing what antibodies they bind. ...Read more

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Hi my Coombs test is positive what I have to do? What is the next step?

Let me explain: The direct coombs test is used to test for autoimmune hemolytic anemia; ie, a condition of a low count of red blood cells (aka rbcs) caused by immune system lysis or breaking of rbc membranes causing rbc destruction. Follow hematologist direction for the treatment and precautions. ...Read more

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What is the indirect and direct Coombs test?

What is the indirect and direct Coombs test?

RBC antibodies: These tests are used to detect antibodies against red blood cells (rbcs). The direct coombs test is used in autoimmune hemolytic anemia. That's when your antibodies attack & destroy you own rbcs. The indirect test is used to detect potential transfusion reactions & in pregnancy especially for rh incompatibility when mom is rh- & fetus is rh+. For a more complete explanation see wikipedia. ...Read more

Lena Caron Dr. Caron
3 doctors agreed:
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S there difference between indirect and direct Coombs test?

Lena Caron Dr. Caron
3 doctors agreed:
S there difference between indirect and direct Coombs test?

Yes: The direct coombs test is typically used to test for autoimmune hemolytic anemia, a disorder involving destruction of red blood cells. It determines whether or not antibodies are present on the surface of the patient's rbcs. The indirect coombs test is typically used to test for blood type compatibility prior to a transfusion, and detects the presence of antibodies in the serum of the patient. ...Read more

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I am rh- and my boy friend is rh- so will my babys indirect Coombs test came back positive?

I am rh- and my boy friend is rh- so will my babys indirect Coombs test came back positive?

Baby is also Rh- : Your baby will also be rh-. Because rh- is recessive to rh+ you and your boyfriend both have two rh- genes. Your haplotype is rh-/rh- and your phenotype rh- and so is his. You and he can only give rh- genes to your babies. All of your babies with this father will be rh-/rh-. Don't sweat it. ...Read more

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What are the differences between direct Coombs test and indirect Coombs test?

Both test Ag-Ab rxns: Direct Coombs will test for the reaction using the patient’s RBCs, if there is a reaction, then the direct test is positive, used to test for autoimmune hemolytic anemia. Indirect Coombs test uses the patient’s serum (not rbcs) which is added to rbcs that are known to have a certain antigenicity, positive in cases of hemolytic diseases of the newborn, mother's serum against baby's RBCs, ...Read more

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What is the difference between the direct Coombs test and indirect Coombs test?

What is the difference between the direct Coombs test and indirect Coombs test?

Bound vs unbound ABs: Direct coombs' test is used to detect antibodies that are already bound to the surface of red blood cells. Many diseases and drugs (quinidine, methyldopa, and procainamide) can lead to production of these antibodies indirect coombs' test looks for unbound circulating antibodies against a series of standardized red blood cells. The indirect coombs' test is only rarely used to diagnose a condition. ...Read more

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Why can't you donate plasma with an abnormal indirect Coombs test result?

Antibody to red cell: A person with positive indirect coombs test has antibodies to red cells. If such plasma is transfused into a person, s/he could suffer loss of her/his own red cells. ...Read more

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Is the direct Coombs test done at birth testing the baby or the mother? Whose Coombs is being tested?

Is the direct Coombs test done at birth testing the baby or the mother? Whose Coombs is being tested?

Baby's Red cells and: mother's antibodies. The Direct Coombs test in a newborn is done to look for maternal antibodies that may have coated the baby's red cells. So, in a way both are being tested, but it is mainly to test for maternal antibody induced hemolytic anemia in the baby. ...Read more

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I am b - hubby is o +. I am not pregnant but before pregnancy can I get the indirect Coombs test done to check if my blood is sensitized?

I am b - hubby is o +. I am not pregnant but before pregnancy can I get the indirect Coombs test done to check if my blood is sensitized?

Ask OB/Gyn: Easier and safer to get Rhogam shot to provide passive protection to fetus, if are or might become sensitized to (+) due to any peri-placental sharing. ...Read more

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I`m pregnant, have rh-positive blood type and Coombs test is positive. It`s my second pregnancy, in first i had negative coombs. Will my baby be ok?

I`m pregnant, have rh-positive blood type and Coombs test is positive. It`s my second pregnancy, in first i had negative coombs. Will my baby be ok?

Unsure: You will likely need to have additional testing done during the pregnancy to determine if there is any compromise of the fetus. If there is a problem with the fetus due to rh iso-immunization, then there are interventions that can improve the outcome. Keep your appointments. ...Read more

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Newborn had positive Coombs test - i'm O positive and he's B positive. He didn't develop jaundice. How common is a positive Coombs test in newborns?

Newborn had positive Coombs test  - i'm O positive and he's B positive. He didn't develop jaundice. How common is a positive Coombs test in newborns?

Common.: About 1 out of 3 pregnancies where the mother and child are ABO incompatible will be Coombs positive, but actual hemolytic disease of the newborn is rare. Only IgG type anti-A or anti-B cross the placenta, which most people don't express. Second the A and or B antigen is not heavily expressed on fetal cells. Also other cells besides RBCs express A and or B and "soak up" the antibodies. ...Read more

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Would it be possible for a body to have adjusted to autoimmune hemolytic anemia over time. I have had fatigue, low grade fevers, positive coombs test, and an alarming drop in blood levels after surgery not losing much. labs come back low normal.

Would it be possible for a body to have adjusted to autoimmune hemolytic anemia over time. I have had fatigue, low grade fevers, positive coombs test, and an alarming drop in blood levels after surgery not losing much. labs come back low normal.

Worth knowing: Let's finish your workup. Plenty of folks are Coombs-positive but not hemolyzing. If your reticulocyte count is up and you're well-nourished and aren't iron-deficient and it's been a while since surgery, maybe you're hemolyzing -- a reticulocyte count will tell you. With Coombs-pos, fatigue, low-grade fever, get tested for lupus. Your physician needs these missing pieces. ...Read more

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If mother is o positive and baby is a or b postive, how many will test postive for direct Coombs at birth? My Son did but didn't have jaundice.

If mother is o positive and baby is a or b postive, how many will test postive for direct Coombs at birth? My Son did but didn't have jaundice.

Not automatic: If there are minor blood type incompatibilities, like ABO,not every doctor will test every baby with a direct Coombs. Some only test if the baby shows signs of early jaundice. So it's very difficult to say the exact percentage who are positive because not every baby who fits the question is even tested, let alone keeping track of how many are positive. Being + doesn't equal jaundice as you've seen ...Read more

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Am 16weeks pregnant and i tested coombs Indirect positive. Can it affect the baby or makes the baby abnormal?

Am 16weeks pregnant and i tested coombs Indirect positive. Can it affect the baby or makes the baby abnormal?

It refers to blood : You have red blood in you as does your husband. On the outside of the cells there are sugar molecules- either A or B or neither. Each of you will contribute the genes so the infant will get one from you and one from him and have either type A or type B or type AB or type O (neither). There is another Rh system. The Coombs refers to antibodies that you have against blood cells. Disc with your OB ...Read more

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Got slightly high porphyrin and Dr wants direct coombs, what is he trying to find? He hasn't explained what may be wrong

Got slightly high porphyrin and Dr wants direct coombs, what is he trying to find? He hasn't explained what may be wrong

Ask him.: Perhaps doctor is investing other possibilities. A normal direct Coombs test is strong evidence against autoimmune hemolytic anemia. Slighty high porphyria may be hard to interpret. Very high porphyria is seen in some kinds of porphyria. ...Read more