Testing and Evaluation of the CDITM, 3M Health Care CDTM 400 Extracorporeal Blood Gas Monitoring System.
Final rept. for Mar 98,
AIR FORCE RESEARCH LAB BROOKS AFB TX HUMAN EFFECTIVENESS DIRECTORATE
Pagination or Media Count:
The CDI 400 provides continuous, on-line monitoring of extracorporeal pH, PCO2, PO2, temperature, calculated arterial base excess BE or bicarbonate HCO3, and venous oxygen saturation SvO2. The CDI 400 is intended for use during cardiopulmonary bypass procedures when continuous blood gas and pH monitoring is desired. The CDI 400 utilizes a microprocessor based monitor and optical fluorescence technology. The fiberoptic cable assemblies one venous and one arterial connect the monitor to a disposable sensor and flow-through cell inserted into the extracorporeal circuit. Light pulses originating from a flash lamp located in the monitor pass through optical filters so light pulses of a specific frequency are transmitted down the fiberoptic bundles to the microsensors. The intensity of this emitted light depends upon the concentration of oxygen, carbon dioxide, and hydrogen ions passing through the gas and ion permeable membrane. The light emitted by the fluorescent microsensors is returned to the monitor through receiving optical fibers in the fiberoptic bundle. A filter is used to isolate the specific frequencies of interest from the returning light spectrum for measurement by a light detector. The output signal of the detector is converted by the microprocessor to a numerical readout in millimeter of mercury mm Hg, kilopascals kPa, or pH units which is displayed on the face of the monitor. The CDI 400 also displays calculated values for either the arterial base excess mEqL or arterial bicarbonate concentration mEqL and venous hemoglobin O2 saturation . The CDI 400 operates from 115 VAC60 Hz power and weighs 16.3 lbs. The dimensions are 9.5 in. H. X 9.75 in. W. X 9 in. D.
- Anatomy and Physiology
- Medicine and Medical Research