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Topic: Crossmatching

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	Blood Typing and Crossmatching Information on Healthline
		Blood typing and crossmatching are most commonly done to make certain that a person who needs a transfusion will receive blood that matches (is compatible with) his own.
		Blood typing and crossmatching tests are based on the reaction between antigens and antibodies.
		When blood is crossmatched, patient serum is mixed with cells from donated blood that might be used for transfusion.
	www.healthline.com /galecontent/blood-typing-and-crossmatching (659 words)

	EFI - The European Federation for Immunogenetics (Site not responding. Last check: 2007-10-18)
		Crossmatching for the detection of HLA specific antibodies must use techniques equivalent in sensitivity to the screening test.
		Crossmatches must be performed with potential donor unseparated lymphocytes or with T enriched lymphocytes.
		For lymphocytotoxic crossmatching, an HLA specific positive control for the activity of complement and a negative control for the viability of the donor lymphocytes must be included for each tray.
	www.efiweb.org /standards_5.4/standards_pt7.html (508 words)

	Kidney Transplant Matching: What It Means
		Crossmatching is a very sensitive and final test performed on a kidney donor and a particular recipient.
		The basic crossmatch test involves a mixing of cells and serum to determine whether or not the recipient of a kidney will respond to the transplanted organ by attempting to reject it.
		Crossmatch testing, which involves several different phases and, perhaps, as many as 10 to 15 different or separate tests, comes down to a fairly simple final result.
	www.aakp.org /AAKP/RenalifeArt/2001/transplantmatching.htm (1587 words)

	Blood Typing And Crossmatching \| AHealthyMe.com
		Before blood from a donor and the recipient are crossmatched, both are ABO and Rh typed.
		To begin the crossmatch, blood from a donor with the same ABO and Rh type as the rcipient is selected.
		The desired result of a crossmatch is that compatible donor blood is found.
	www.ahealthyme.com /topic/topic100586530 (2463 words)

	ISAC XX Abstracts (Site not responding. Last check: 2007-10-18)
		Whilst the Flow Cytometric Crossmatch is used by most transplantation centres to assist with the selection of donor-recipient combinations, it is becoming clear that the presence of recipient antibody against donor cells is not always associated with poor graft outcome.
		The aim of the present study was to compare results of cytotoxic panel reactivity flow cytometric crossmatching results and between donor/recipient pairs and the newly developed Flow PRA beads.
		In comparison with flow crossmatching and FlowPRA a total of 53 donor recipient pairs were examined.
	www.wiley.com /legacy/products/subject/life/cytometry/isac2000/6117.htm (292 words)

	UT College of Veterinary Medicine: Blood Bank
		Despite this, it is recommended that all recipients be crossmatched prior to receiving a blood transfusion (particularly dogs which have received a previous blood transfusion, which are a breeding bitch or which previously whelped).
		Crossmatching is similar to blood typing, except that specific antisera are not used, and consists of a major and minor part.
		The major crossmatch should always be compatible, although the minor crossmatch is of less importance.
	www.vet.utk.edu /bloodbank/vet_banking.shtml (1942 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		Crossmatching Strategies During the mid-1960’s, Terasaki (3) and Kissmeyer-Nielsen (4) independently discovered that preformed anti-donor lymphocytotoxic antibodies caused hyperacute rejection of kidney allografts.
		The crossmatch test is a direct test for antibodies against the HLA antigens of a specific donor.
		In all cases where a pre-transplant crossmatch is waived, a peri-transplant or retrospective crossmatch is recommended to guide post-transplant management.
	www.unos.org /PoliciesandBylaws/policies/docs/policy_109.doc (1129 words)

	Archives of Pathology & Laboratory Medicine: North American Pretransfusion Testing Practices, 2001-2004: Results ... (Site not responding. Last check: 2007-10-18)
		In 2004, the crossmatch section data collection was expanded to include the electronic or computer crossmatch as a reportable method.
		Crossmatch methods were then grouped into those with alloantibody present (alloimmunized patients) or alloantibody absent (nonalloimmunized patients) for data analysis.
		As a result, 93% of 3185 laboratories correctly reported that the crossmatch was incompatible, whereas 254 laboratories incorrectly reported the crossmatch to be compatible.
	www.looksmartwomenshealth.com /p/articles/mi_qa3725/is_200508/ai_n14851928/pg_2?pi=helwom (1362 words)

	FACTORS INFLUENCING OUTCOME IN FLOW CYTOMETRY CROSSMATCHING FOR PRIMARY RENAL TRANSPLANTS (Site not responding. Last check: 2007-10-18)
		Flow cytometry crossmatching (FCXM) is a very sensitive method for detecting the presence of alloantibodies against an organ donor's mismatched HLA antigens.
		A three-color flow cytometric crossmatch (FCXM) was used to identify anti-donor IgG reactions against both B and T lymphocytes at the time of transplant.
		Reactions positive against both B and T cells were consistent with HLA class I reactivity, and those that were B cell positive only were considered to be against HLA class II antigens.
	www.a-s-t.org /library/abstracts99/314.htm (414 words)

	Blood Typing And Crossmatching \| myhealth@wellmark (Site not responding. Last check: 2007-10-18)
		If the person needs a blood transfusion, another test called crossmatching is done after the blood is typed to find blood from a donor that the person's body will accept.
		Crossmatching is the final step in pretransfusion testing.
		Blood type based on the presence or absence of the A and B antigens on the red blood cells.
	www.myhealthwellmark.com /topic/topic100586530 (2493 words)

	American Society of Transplant Surgeons (Site not responding. Last check: 2007-10-18)
		In 2001, when ASHI submitted its renewal application to HCFA for deemed status, ASHI's submitted checklists were found to be inconsistent with the wording of the CLIA regulations in that testing requirements for non-renal solid organ transplantation were interpreted by ASHI to be "recommended" ("should") standards but by HCFA as "mandatory" ("must") standards.
		The ASHI request was intended to avert disruption of the practices of the entire transplant community, which does not uniformly perform HLA typing or crossmatching for non-renal solid organ transplant recipients.
		HCFA's requirement for adherence to the mandatory nature of the regulations was conveyed in two letters (10/3/00 and 12/6/00) from Judith Yost representing HCFA to Donna Phelan and Dolly Tyan, respectively, representing ASHI.
	www.asts.org /histocompatibility.cfm (453 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		It is recommended that crossmatches and should be performed with B lymphocytes using a method that distinguishes between reactions with T and reactions with B lymphocytes.
		Final crossmatches performed prior to transplantation should utilize a recipient serum sample collected within the past 48 hours before transplant if the recipient has class I anti-HLA antibodies (determined by the laboratory's established criteria) or has had a recent sensitizing event.
		HI5.300 It is recommended that A a reverse lymphocytotoxicity and/or granulocytotoxicity crossmatch (donor serum, patient cells) is advisablebe performed before initiating mother to child or wife to husband pretransplant donor specific blood transfusions.
	www.optn.org /policiesandBylaws/byLaws/docs/byLaw_AppendixB_Attach1H.doc (807 words)

	Blood bank cuvette cassette and label therefor - Patent 4472357
		An article of manufacture according to claim 5 including a plurality of different test reagents, one in each of said cuvette means, the reagent in a cuvette means conforming to the reagent information on the part of the label means aligned with that cuvette means, and separate sealing means closing each cuvette means.
		This further testing is referred to as crossmatching and is done in a third cassette 11 to which sticker 24 is applied.
		That donor's unit of blood which previously had been donated to the blood bank and classified and from which the red cells used in the crossmatching tests had been obtained will be marked or identified as being suitable for transfusion to that patient.
	www.freepatentsonline.com /4472357.html (5017 words)

	The Tamil Nadu Dr (Site not responding. Last check: 2007-10-18)
		It was only in the mid-1970s that the minor crossmatch was finally abandoned as antibody screening of donor blood became routine.
		After antibody detection tests are run, a major crossmatch, namely, testing of the patient's serum with RBCs from the donor, should be performed before the transfusion of whole blood or RBC components.
		In some special instances, crossmatching of blood is dispensed with according to a policy called "type and screen." This policy stipulates that blood does not have to be crossmatched in advance for patients undergoing surgical procedures usually not requiring blood.
	www.tnmmu.ac.in /deptrans2.htm (2264 words)

	Blood typing and crossmatching
		An antibody screening test is done before a crossmatch to check for unexpected antibodies to antigens in these systems.
		In addition, antibody screening is done to look for antibodies to certain Rh, Duffy, MNS, Kell, Kidd, and P system antigens.
		If an antibody to one of these antigens is found, only blood without that antigen will be compatible in a crossmatch.
	www.lifesteps.com /gm/Atoz/ency/blood_typing_and_crossmatching.jsp (2552 words)

	PATHOLOGY EL: Immunopathology Lecture 2 (Site not responding. Last check: 2007-10-18)
		Improved immunosuppression, control of rejection, HLA matching, and more sensitive methods for crossmatching have resulted in a steady improvement in graft survival during the past decade.
		Hence, a crossmatch is performed just prior to transplantation, testing patient's serum against donor lymphocytes, a convenient source of cells bearing HLA antigens.
		Currently, a 6-month patient survival of 95% is achievable at most centers, despite the fact that criteria for recipient selection have been liberalized to include older individuals and patients with systemic illnesses such as diabetes mellitus.
	cats.med.uvm.edu /cats_teachingmod/pathology/path301/immunopath/imel/301immu3.htm (1973 words)

	Transfusion crossmatching (Steve Harris) (Site not responding. Last check: 2007-10-18)
		From: Steve Harris Newsgroups: sci.med Subject: Re: crossmatching blood before transfusion Date: 13 Jul 2005 18:39:37 -0700 Message-ID: <1121305177.367488.296660@g44g2000cwa.googlegroups.com> >>How could this have happened if the blood is crossmatched.
		This alerts them to the presence of antibodies that cause acute transfusion reactions (they cause cells to agglutinate), but even crossmatching doesn't prevent late transfusion reactions which are caused by antibodies in smaller amounts, and antibodies that develop later as the body makes them.
		This alerts them to the > >presence of antibodies that cause acute transfusion reactions (they > >cause cells to agglutinate), but even crossmatching doesn't prevent > >late transfusion reactions which are caused by antibodies in smaller > >amounts, and antibodies that develop later as the body makes them.
	yarchive.net /med/transfusion_crossmatching.html (466 words)

	Immunogenetics Laboratory \| About This Lab
		These tests are required for patients undergoing evaluation for organ transplantation, for patients requiring platelet transfusions from HLA-matched donors and for patients undergoing evaluation of conditions with known associations to particular HLA alleles.
		Crossmatching mixes serum from patients and lymphocytes from potential donors to test whether the patient has formed antibody to donor antigens.
		Serum for screening and crossmatching tests should not be collected in serum separator tubes.
	www.psbc.org /lab_immunogenetics (478 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		This is for a CDC crossmatch and a FAC crossmatch between recipient and donor.
		The Bcell positive crossmatch by CDC may be a contraindication to transplantation.’ Procedure for Living Related Renal Donation If a potential live donor has been identified for a renal patient then compatibility testing must be performed.
		The crossmatch can then be repeated as necessary in the lead up to transplantation with a final crossmatch performed a few days before the operation.
	www.scotblood.co.uk /docs/H_and_I.doc (3163 words)

	Blood Typing and Crossmatching Summary - Blood Typing and Crossmatching Information
		If the person needs a blood transfusion, another test called crossmatching is done to find blood from a donor that the person's body will accept.
		An antigen is a foreign substance that causes the body to launch an attack, known as an immune response, against it.
		When a transfusion is needed, blood from a donor and the recipient are typed and crossmatched.
	www.bookrags.com /other/health/blood-typing-and-crossmatching-woh.html (884 words)

	UC Davis School of Medicine - Transfusion Services (Site not responding. Last check: 2007-10-18)
		When the blood of a patient is sent to the laboratory for "type and screen", it means that the patient's blood is typed for ABO and Rh, and an irregular antibody screen is performed.
		It is an immediate spin crossmatch that is routinely used in patients who have a negative antibody screen and no complications.
		Double or triple crossmatching of nursery infants with one unit is encouraged.
	som.ucdavis.edu /departments/pathology/clinical/transfusion_medicine (2341 words)

	Oconee Memorial Hospital Warning Letter (Site not responding. Last check: 2007-10-18)
		Failure to follow written standard operating procedures (SOPs), including all steps to be followed in the compatibility testing and distribution of blood and blood components for transfusion, as required by 21 CFR 606.100(b).
		The blood sample was collected from the wrong patient who had a different blood type from the patient for whom the blood transfusion was intended.
		Personnel responsible for the compatibility testing of blood and blood components do not have adequate training and experience to ensure competent performance of their assigned functions, and to ensure that the final product has the safety, purity, potency, identity and effectiveness it purports or is represented to possess, as required by 21 CFR 606.20 (b).
	www.fda.gov /foi/warning_letters/g5309d.htm (589 words)

	CACMLE Website - SS Red Cell Crossmatching
		Crossmatching of the potential recipient with donor bloods has changed little over the past 30 years, primarily because the technology applied to this test has not significantly changed.
		Increasing the sensitivity and specificity of testing, these newer technologies, approved by the FDA, are also eliminating the subjectivitiy that has been integral to Transfusion Medicine and Blood Banking.
		This self-study explains the mechanics of crossmatch testing, the new techniques and technologies available today, and the advantages and disadvantages of each.
	www.cacmle.org /page54.htm (182 words)

	Merck Vet. Edition - Crossmatching
		The major crossmatch detects antibodies already present in recipient plasma that could cause a hemolytic reaction when donor RBC are transfused; it will not detect the potential for sensitization to develop.
		The minor crossmatch is the reverse of the major crossmatch, ie, recipient cells are combined with donor plasma.
		The minor crossmatch is important only in species with naturally occurring isoantibodies or if the donor has been previously transfused or, in horses, previously pregnant.
	www.merckvetmanual.com /mvm/htm/bc/10303.htm (340 words)

	Crossmatching (Site not responding. Last check: 2007-10-18)
		The aim of the crossmatching function is to avoid unnecessary sales activities and sales promotions.
		It enables you to keep track of which partners are or were involved in particular sales activities or mailing campaigns to ensure that these partners are not contacted too quickly with similar campaigns.
		During processing of the crossmatching list, you have at your disposal all the usual list functions such as changing the list display and branching to master data or your mail inbox.
	help.sap.com /saphelp_40b/helpdata/en/93/743717546011d1a7020000e829fd11/content.htm (353 words)

	RapidVet-H (canine) Article (Site not responding. Last check: 2007-10-18)
		1) Blood crossmatch, which is performed to detect alloantibodies in the recipient's (major) and donor's (minor) plasma between 2 dogs that have never before received a transfusion, should be compatible and may, therefore, not need to be done.
		After such a transfusion, a major crossmatch between the same recipient and donor (or another donor with the same blood type as the previous donor) could yield an incompatible result.
		A simple crossmatch procedure without Coombs' reagent that evaluates agglutinins and hemolysins at room temperature and 37C should be used, and appropriate controls to detect autoagglutination should be included.
	www.rapidvet.com /caninedonor.html (1165 words)

	The clinical significance of flow cytometry crossmatching in heart transplantation -- Bishay et al. 17 (4): 362 -- ...
		The clinical significance of flow cytometry crossmatching in heart transplantation -- Bishay et al.
		The clinical significance of flow cytometry crossmatching in heart transplantation
		in cardiac transplant recipients with a negative cytotoxic crossmatch.
	ejcts.ctsnetjournals.org /cgi/content/abstract/17/4/362 (413 words)

	Systems and methods for removing undesired matter from blood cells - Patent 5180504
		Systems and methods for collecting blood substantially free of undesired matter assure that accurate crossmatching and typing of cellular blood components can be done prior to transfusion, even though the cellular components are collected and stored in different containers.
		The attached samples of the donor blood can be analyzed at a convenient time prior to transfusion for crossmatching and typing purposes by separating one or more of the snap-apart chambers 23 from the remaining donor tube 22 (shown by phantom lines in FIG.
		The invention assures direct traceability between the red blood cells made substantially free of white blood cells for transfusion and the donor from whom the red blood cells were obtained, while at the same time using separate blood processing container 12 and blood storage container 34.
	www.freepatentsonline.com /5180504.html (5175 words)

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