Evaluation of ABO Isoagglutinins Level in Blood Group O Donors

Study Overview
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Brief Summary
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Our study is aiming for evaluation f the titre of anti-A and anti-B in plasma of blood grop O donors, study the effect of pooling of blood product on the level of A and B isoagglutinins in blood group O donors and screening for the safest group o donors(who have the lowest anti-A antd anti-B titre) for transfusion in urgent need of blood.

Detailed Description
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the use of O blood group transfusion to patients of all groups has continued since the second world war, nevertheless the transfusion of group O plasma/ platelet concentrate to group A, B and AB recipient sometimes causes severe red cell destruction , Acute haemolysis has been reported following transfusion of non-iso group single donor platelet (PLT) concentrates and may be more common than is appreciated. This red blood cells destruction happens based on the fact that the sera from group O people contain two separable antibodies, anti-A and anti-B . When it comes to PLT transfusion therapy we are dealing with issues arising from the fact that PLTs contain both significant amounts of ABO antigen on their surface, as well as anti ABO isogglutinins in the donor's plasma which caused reduction the volume of incompatible plasma administrated. From another point of view the risk of high titer units is considered low with group O, post storage, pooled PLT concentrate. However its necessary to establish a (golden standard) method for the determination of antibody titer in order to be able to differentiate accurately the high titer donors. So, for improving the safety of group O plts we need to define a safe level of antibody titer or reduce the volume of incompatible plasma administrated.

Official Title
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Evaluation of ABO Isoagglutinins Level in Blood Group O Donors

Conditions
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Isoagglutinins Level

Intervention / Treatment
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* Other: withdraw blood samples


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Healthy adults blood group O donors Exclusion Criteria: Other blood groups donors. Donors with history of chronic or autoimmune diseases

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Other: withdraw blood samples|withdraw blood sample from gorup O donors|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Decrease the risk of red cell destruction resulting from transfusion of RBCs/ platelet concentrate group O transfusion in urgent cases. | Using blood group typ O For other blood group types without causing any reaction resulting from blood transfusion . | 2 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| screening for the best group O donors to use for other groups urgent cases as a reserve for transfusion. | Using blood group typ O For other blood group types without causing any reaction resulting from blood transfusion . | 2 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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urgent blood transfusion , group O