Continuous intravascular monitoring of plasma potassium using potassium-selective electrode catheters.
A fast-responding, potassium-selective electrode catheter suitable for continuous intravascular monitoring is described. Traces illustrating its performance in human patients and anesthetized greyhounds are shown. There was no significant difference between off-line blood samples analysis (using an in vitro electrode) and results obtained with the in vivo electrode; mean absolute difference was 0.11 +/- 0.11 (SD) mM. The technique described is simple and reliable, and represents an advance on existing intermittent sampling methods for detailed monitoring of rapid changes in plasma potassium.
D000818:Animals; D006328:Cardiac Catheterization; D006348:Cardiac Surgical Procedures; D004285:Dogs; D004567:Electrodes, Implanted; D006801:Humans; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods*; D011188:Potassium / Q000097:blood*
D011188:Potassium