. Author manuscript; available in PMC: 2024 Mar 13.

Published in final edited form as: Transfusion. 2020 Oct 16;60(12):2929–2937. doi: 10.1111/trf.16137

Table 5:

Comparative instrument performance based on a total of 12773 tests on Panther and 13714 on cobas 6800

Measurement	cobas 6800	Panther	p value
Measurement	N (%) or Mean (SD)		p value
Invalid tests N (%) (1)	540 (4.2%)	254 (1.9%)	<0.001
Breakdowns during evaluation	9	4	0.27
Mean time between failures (MTBF) (hours) = Total uptime/Number of breakdowns	171 h	400 h	N/A
^† Mean time to repair (MTTR) (hours) = Total downtime/Number of breakdowns	2.9 h	1.6 h	N/A
Instrument availability % = MTBF/ (MTBF+MTTR)	98.34%	99.59%	N/A

^†

Engineers were often on site as the Grifols Tigris system in use at the time was supported by the same company.

An additional 30 minutes added per call out to correct for this bias.