Potassium, sodium ion estimates in a closed in vivo system using glass electrodes.
D000818:Animals; D002552:Cerebral Ventricles / Q000502:physiology; D004285:Dogs; D004594:Electrophysiology / Q000295:instrumentation*; D005898:Glass; D011188:Potassium / Q000134:cerebrospinal fluid*; D012964:Sodium / Q000134:cerebrospinal fluid*
D012964:Sodium; D011188:Potassium