Table IV.

Acceptable turnaround time (TAT) for red cell genotyping.

Clinical need	TAT for red cell genotyping considered acceptable by the participants				Actual TAT for serology (median)†
	Median	Mean	Mode	Respondents (n)*
Urgent	60 min	52.2 min	60 min	81	1 hour
Routine	4 hours	4.3 hours	4 hours	88	4.5 hours
Possible/probable	8 hours	12.1 hours	24 hours	107	n/a
Prophylactic	1 day	1.2 days	1 day	89	n/a

^*Participants who did not give a reply were excluded (urgent: n=1; routine: n=10; prophylactic: n=18). Some participants replied “0 minutes” or “not feasible” for urgent (n=25) and routine (n=9) levels of clinical need and were excluded from calculations.

^†As currently offered by large medical centres in the USA; random website search for TAT claims of 14 transfusion services (see Supplementary Table S1).

n/a: not applicable (no data available).