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Nearly Two Decades Using the Check-Type to Prevent ABO-Incompatible Transfusions
One Institution’s Experience

Priscilla I. Figueroa MD, Alyssa Ziman MD, Christine Wheeler MD, Jeffrey Gornbein DrPH, Michael Monson, Loni Calhoun MT(ASCP)SBB
DOI: http://dx.doi.org/10.1309/C6U7VP87GC030WMG 422-426 First published online: 1 September 2006


To detect miscollected (wrong blood in tube [WBIT]) samples, our institution requires a second independently drawn sample (check-type [CT]) on previously untyped, non–group O patients who are likely to require transfusion. During the 17-year period addressed by this report, 94 WBIT errors were detected: 57% by comparison with a historic blood type, 7% by the CT, and 35% by other means. The CT averted 5 potential ABO-incompatible transfusions. Our corrected WBIT error rate is 1 in 3,713 for verified samples tested between 2000 and 2003, the period for which actual number of CTs performed was available. The estimated rate of WBIT for the 17-year period is 1 in 2,262 samples. ABO-incompatible transfusions due to WBIT-type errors are avoided by comparison of current blood type results with a historic type, and the CT is an effective way to create a historic type.

Key Words:
  • Check type
  • ABO-incompatible transfusion
  • Specimen collection errors
  • Miscollected sample
  • Transfusion errors
  • Sample identification
  • Blood typing