PMID: 7579111Aug 1, 1995

Evaluation of the Paratrend 7 intravascular blood gas monitor during cardiac surgery: comparison with the C4000 in-line blood gas monitor during cardiopulmonary bypass

Journal of Cardiothoracic and Vascular Anesthesia
B VenkateshS P Hendry


To evaluate the performance of the Paratrend 7 intravascular blood gas monitor (Biomedical Sensors, High Wycombe, UK, Ltd) during cardiac surgery and compare it with that of an in-line blood gas monitor placed in the arterial limb of an extracorporeal circuit during cardiopulmonary bypass. A prospective study. Consecutive patient enrolment. In the cardiac surgical intensive care units at a tertiary referral center. Insertion of the Paratrend 7 intravascular sensor through the radial arterial catheter after induction of anesthesia. Simultaneous measurements of pH, PCO2, and PO2 were made from the sensor and the blood gas analyzer, and the bias and precision were calculated on all the measured parameters. The bias and precision of the intravascular sensor during bypass for pH, PCO2, and PO2 were 0.01 and 0.06 pH units, 0.5 and 2.5 mmHg (2% and 8%), and 3 and 45 torr (0.5% and 14%), respectively. The bias and precision for the prebypass and the postbypass phases were comparable. The bias and precision of the extracorporeal monitor for pH, PCO2, and PO2 were 0.04 and 0.1 pH units, -0.3 and 4 mmHg (-1% and 15%) and 8 and 48 mmHg (4 and 18%), respectively. There were no instances of any complications attributable to the intravascular...Continue Reading


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Related Concepts

Blood Gas Analysis
Carbon Dioxide
Cardiopulmonary Bypass
Peripheral Venous Catheterization
Medical Device Design
Extracorporeal Circulation
Cardiac Surgery Procedures
Hydrogen-Ion Concentration

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