Issue |
J Extra Corpor Technol
Volume 22, Number 3, September 1990
|
|
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Page(s) | 120 - 124 | |
DOI | https://doi.org/10.1051/ject/1990223120 | |
Published online | 21 August 2023 |
Original Article
On-Line Arterial PO2 Measurements During Cardiopulmonary Bypass
Surgical Clinic A and Institute of Anesthesiology, University Hospital, Zurich, Switzerland
* Address correspondence to: D. Demierre, Reusslistr. 17 B, CH-8172 Niederglatt, Switzerland.
A modified intra-arterial PO2 sensor (O.D. 0.55 mm) and associated automatic temperature correction module (Roche) were evaluated as on-line monitoring devices during extracorporal circulation (ECC) in six dogs as well as in four patients undergoing open-heart surgery.
Performance of the equipment was assessed by comparing the PO2 values determined by the sensor with those measured by a blood gas analyzer (AVL). In addition, the reliability of the PO2 sensor calibration factor and the accuracy of the automatic temperature correction module were determined.
The correlation coefficient between sensor and blood gas analyser was r = 0.97 (n=14) for laboratory and r = 0.98 (n=14) for clinical values with blood temperature ranging from 38°C to 22.5°C.
The calibration factor determined in vivo correlated with the value provided by the manufacturer (r=0.97, n=4).
The correlation factor between calculated and automatic temperature correction was r=0.97 (n=21). On line PO2 monitoring is feasible with this equipment and early clinical experience was satisfying.
Key words: Extracorporeal circulation / sensor / monitor
© 1990 AMSECT
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