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Catheter system for potassium measurements in medical application

: Uhlig, A.; Schnakenberg, U.; Lindner, E.; Dittrich, F.; Hintsche, R.

Foundation for Sensor and Actuator Technology, Stockholm:
8th International Conference on Solid-State Sensors and Actuators 1995 and Eurosensors IX. Digest of technical papers. Vol. 2. Sessions A7-D13. Papers No.232-496
Stockholm: Congrex, 1995
ISBN: 91-630-3473-5
International Conference on Solid-State Sensors and Actuators <8, 1995, Stockholm>
Eurosensors <9, 1995, Stockholm>
Conference Paper
Fraunhofer ISIT ()

In critical care the blood potassium concentration is an important parameter to characterise the patients condition. To switch from the common ex situ determination of potassium (mostly in serum) to the in vivo monitoring of it in whole blood opens new dimensions in the diagnostics but produce a number of problems to be solved. For the task a new potassium sensitive microsensor was developed using silicon technology. The abstract will discuss the manufacture and performance of the catheter-chip in respect to slope, reproducibility, reliability and long time stability in biological fluids.