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Table 3 Assessment of variations in lactate concentration using the Lactate Pro in the presence of common obstetric contaminants

From: A pilot study to determine the feasibility of collecting amniotic fluid samples from women during labour and measuring amniotic fluid lactate at point of care

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
  1. # Amniotic fluid was thawed from–20°C prior to use, except for glove lubricant where amniotic fluid was fresh.
  2. * Glove lubricant was not tested in triplicate and the reading was taken after 30 min.