cross-matching

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cross-match·ing

(kros'match'ing),
1. A test for incompatibility between donor and recipient blood, carried out before a transfusion to avoid potentially lethal hemolytic reactions between the donor's red blood cells and antibodies in the recipient's plasma, or the reverse; performed by mixing a sample of red blood cells of the donor with plasma of the recipient (major crossmatch) and the red blood cells of the recipient with the plasma of the donor (minor crossmatch). Incompatibility is indicated by clumping of red blood cells and contraindicates use of the donor's blood.
2. In allotransplantation of solid organs (for example, kidney), a test for identification of antibody in the serum of potential allograft recipients that reacts directly with the lymphocytes or other cells of a potential allograft donor; presence of these antibodies usually, if not always, contraindicates the performance of the transplantation because virtually all such grafts are subject to a hyperacute type of rejection.

cross-match·ing

(kraws'mach-ing)
1. A test for incompatibility between donor and recipient blood, carried out before transfusion to avoid hemolytic reactions between the donor's red blood cells and antibodies in the recipient's plasma, or the reverse; performed by mixing a sample of red blood cells of the donor with plasma of the recipient (major cross-match) and the red blood cells of the recipient with the plasma of the donor (minor cross-match). Incompatibility is indicated by clumping of red blood cells and contraindicates use of the donor's blood.
2. In allotransplantation of solid organs (e.g., kidney), a test for identification of antibody in the serum of potential allograft recipients that reacts directly with the lymphocytes or other cells of a potential allograft donor; presence of these antibodies usually, if not always, contraindicates the performance of the transplantation because virtually all such grafts will be subject to a hyperacute type of rejection.

cross-matching

A test of the compatibility of blood intended to be transfused. Serum from the donor's blood is mixed with red cells from the recipient's blood. If the bloods are incompatible, the red cells will clump together (agglutination). See also BLOOD TRANSFUSION.

cross-matching

test of compatibility between donor and recipient of blood (to prevent lethal haemolysis), or test of tissue compatibility prior to allograft (organ donation) to prevent later graft-versus-host rejection

matching

comparison for the purpose of selecting objects having similar or identical characteristics.

blood matching
see cross-matching (below).
control matching
see matched study.
cross-matching
determination of the compatibility of the blood or tissue of a donor and that of a recipient before transfusion by placing erythrocytes or leukocytes of the donor in the recipient's serum and erythrocytes or leukocytes of the recipient in the donor's serum. Absence of agglutination, hemolysis and cytotoxicity indicates that the two blood or tissue samples belong to the same group and are compatible.
References in periodicals archive ?
Cross-match to transfusion ratio (C/T ratio) = number of units cross-matched/number of units transfused.
Distribution of demand and issue of different blood components- During the study period it was observed that maximum cross-match and transfusion was done of PRBC, i.
Cross-match to transfusion ratio (C/T) of non-surgical and surgical Departments- Number of units cross-matched and transfused in non-surgical departments is 678 and 672 respectively.
of Cross-match Cross- Units to Transfusion Departments Matched Transfused Ratio (C/T) Non-Surgical 678 672 1.
According to this recommendation, the cross-match to transfusion ratio of 1.
To achieve standard value of cross-match to transfusion ratio, it is mandatory for the blood centre to prevent any contamination to take place and also to carry out procedures in appropriate manner.
The number of patients, units of blood cross-matched and number of units transfused was recorded and the Cross-match to Transfusion ratio (CT ratio) and Transfusion index (Ti) was calculated, thus: CT ratio= No.
5 means that unnecessary cross-match is being done.
5 units of blood per procedure does not require a pre-operative cross-match.
An audit of blood cross-match ordering practices at the Aga Khan University Hospital: first step towards a Maximum Surgical Blood Ordering Schedule.
Basically, if you want to get your predictability for a good cross-match, very high, you need to try to list every possible antibody that can be detected by the most sensitive techniques.
Nurses from the Anthony Nolan Bone Marrow Trust will be at the ground to screen supporters giving a blood sample for a possible cross-match.