Table 3.

Assessment of variations in lactate concentration using the Lactate Pro in the presence of common obstetric contaminants

Additive to amniotic fluid#	Concentration of additive	[Lactate] (mmol/L) Lactate Pro
Glove lubricant*	Baseline	11.0
	1% (v/v)	11.0
	5% (v/v)	10.8
	10% (v/v)	10.1
Blood	Baseline	6.3 ± 0.9
	1% (v/v)	5.9 ± 0.3
	5% (v/v)	6.1 ± 0.3
	10% (v/v)	6.4 ± 0.4
	20% (v/v)	7.9 ± 0.5
Obstetric cream	Baseline	6.3 ± 0.9
	1% (v/v)	6.4 ± 0.5
	5% (v/v)	6.0 ± 0.5
	10% (v/v)	5.9 ± 0.3
	20% (v/v)	5.0 ± 0.1
Meconium	Baseline	7.8 ± 0.0
	1% (w/v)	7.7 ± 0.3
	5% (w/v)	7.4 ± 0.2
	10% (w/v)	7.5 ± 0.3
	20% (w/v)	7.7 ± 0.3

^# Amniotic fluid was thawed from–20°C prior to use, except for glove lubricant where amniotic fluid was fresh.

* Glove lubricant was not tested in triplicate and the reading was taken after 30 min.