Q&A What

What occurance results from obstruction within the ventricles of the brain or inadequate reabsorption of cerebrospinal fluid?

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Page 2

Solute Humana Rabbitb Dogb Plasma Conc. CSF Conc. Plasma Conc. CSF Conc. Plasma Conc. CSF Conc.

Na+ (mM/L)	153	147	148	149	155	151
K+ (mM/L)	4.7	2.9	4.3	2.9	4.6	3.0
Ca2+ (mM/L)	1.3	1.1	5.6	2.5	5.7	2.9
Mg2+ (mM/L)	0.6	1.1	2.0	1.7	1.4	2.0
Cl− (mM/L)	110	113	106	130	121	133
HCO3− (mM/L)	24	22	25	22	26	26
pH	7.40	7.33	7.46	7.27	7.42	7.42
Osmolarity (mOsm)	290	290	298.5	305.2	299.6	305.2