Impact of Delayed Infusion Time in Umbilical Cord Blood Transplantation

Richard Mitchell, John E. Wagner, Claudio Brunstein, Qing Cao, David H. McKenna, Michael R. Verneris

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


In umbilical cord blood (UCB) transplantation, UCB units are typically thawed, washed, and infused into the patient as rapidly as possible. In some instances there is a delay in the time from the unit thaw and wash procedure to infusion into the patient. Therefore, we examined the effect of thaw duration time on engraftment outcomes in 567 patients undergoing UCB transplantation. With a range of 32 to 523 minutes, a prolonged thaw duration had no obvious effect on the incidence of neutrophil engraftment or time to recovery. This was true for recipients of single UCB transplantation (incidence: 97% versus 93%, P = .13; time to neutrophil recovery: 21 days versus 21 days, P = .32; and platelet recovery: 79% versus 78%, P = .48), and similar results were observed in double UCB transplantation (time to neutrophil engraftment: 20 days versus 19 days, P = .71). However, there was a trend toward better platelet recovery in recipients of double UCB transplants with prolonged thaw duration (HR, 1.28; P = .06). In conclusion, this study demonstrates prolonged thaw duration has no detrimental effect on engraftment after single or double UCB transplantation.

Original languageEnglish (US)
Pages (from-to)836-839
Number of pages4
JournalBiology of Blood and Marrow Transplantation
Issue number5
StatePublished - May 1 2017

Bibliographical note

Publisher Copyright:
© 2017 The American Society for Blood and Marrow Transplantation


  • Cord blood
  • Engraftment
  • Thaw time


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