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Table 5 Comparing the RIs of electrolytes in newborns and infants with values for the same age group and for adults in previous studies, text books and kit inserts

From: Establishing reference intervals for electrolytes in newborns and infants using direct ISE analyzer

  Na+(mmol/l) K+(mmol/l) Cl-(mmol/l)
Current study Combined = 126-143 Combined = 4.0-7.9 Combined = 100-111
Perkins et al.[13] venous cord blood = 135-143 venous cord blood = 3.8-6.8 venous cord blood = 102-112
Text books Newborns = 133–146 [14] Newborns = 4.5-7.2 [15] <1 year = 96–111 [15]
  Children Children = 3.5-5.8 [15] 1-17 years = 102–112 [14]
  and adults = 135–148 [14] Adults = 3.5-5.5 [15] Adults = 100–108 [14]
Kit inserts 136-145 [16] 3.5-5.1 [16] 97-111 [16]
Adult values 141.4-152.5 [17] 3.9-5.8 [17] 100.5-111.7 [17]