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Table 3 [Na + ], [K + ], [HCO 3 ], pH and pCO 2 in CSF of normals, controls and Alzheimer’s patients*

From: Sustained choroid plexus function in human elderly and Alzheimer’s disease patients

Ion**

Normal values

Controls

Alzheimer’s

[Na+]

------

146 ± 2 (15)

147 ± 2 (15)

[K+]

------

2.8 ± 0.1 (15)

2.8 ± 0.1 (15)

[HCO3-]

22.9 ± 2.3 (35)

------

23.4 ± 1.3 (15)

pH

7.31 ± 0.03 (35)

------

7.33 ± 0.03 (15)

pCO2 (mm Hg)

47.9 ± 5.7 (35)

------

46.9 ± 3.2 (15)

  1. Normals = normal adults; controls = age-and sex-matched elderly.
  2. *[Na] and [K] data are compiled from Vitvitsky et al.[40]. Acid–base data are obtained from Posner et al.[42] (normal values) and Gottfries et al.[41] (controls and Alzheimer’s patients).
  3. ** Ion concentrations are in mEq/L.
  4. ≠ All values are means ± SD; N = number of subjects in parentheses.