Title :
Monitoring of blood pO/sub 2/ with a thin film amperometric sensor
Author :
Gumbrecht, W. ; Schelter, W. ; Montag, B. ; Bos, J.A.H. ; Eijking, E.P. ; Lachmann, B.
Author_Institution :
Siemens AG, Erlangen, Germany
Abstract :
A sample-taking sensor system for online pO/sub 2/ monitoring of blood is described. The system consists of a two-lumen catheter with a thin-film amperometric sensor cell, a pump unit with instrumentation, and a personal computer. The planar three-electrode system is only covered by a hydrophilic pHEMA membrane to avoid alterations in the composition of any internal electrolyte solution. To overcome the problem of electrode poisoning, the surface of the working electrode is regenerated during the calibration mode of the calibration/measurement cycle. Animal studies have been performed with anaesthetized pigs. The comparison of the sensor values with blood gas analyzer data shows a curved but reproducible correlation.<>
Keywords :
biological techniques and instruments; biosensors; blood; computerised instrumentation; computerised monitoring; electrochemical analysis; microcomputer applications; oxygen; thin film devices; O/sub 2/; anaesthetized pigs; animal; blood gas analyzer; calibration/measurement; electrode poisoning; hydrophilic pHEMA membrane; in vivo experiments; internal electrolyte solution; online monitoring; partial oxygen pressure; personal computer; planar three-electrode system; pump; sample-taking sensor; thin film amperometric sensor; two-lumen catheter; Amperometric sensors; Blood; Calibration; Catheters; Computerized monitoring; Electrodes; Instruments; Microcomputers; Sensor systems; Thin film sensors;
Conference_Titel :
Solid-State Sensors and Actuators, 1991. Digest of Technical Papers, TRANSDUCERS '91., 1991 International Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-87942-585-7
DOI :
10.1109/SENSOR.1991.148805
