Terumo CDI 550 User Manual (English)

Questions and Answers:

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Kevin RiosAug 14, 2025
How to solve PCO2 problems due to prime solutions containing acetic acid ions in Terumo CDI 550?
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  Derek ParkerAug 14, 2025
  If you encounter PCO2 problems with your Terumo Medical Equipment due to prime solutions containing acetic acid ions, it's because acidic prime solutions may adversely affect the CO2 sensor. To resolve this, you can try the following: * Before putting the sensors in line, blow off enough CO2 to raise the pH above 7.00. * Add bicarbonate to the prime solution to raise the pH. * Add the sensors at the last possible moment before going on bypass.
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Richard MarshallAug 17, 2025
What to do if O2 calculation seems to be off in Terumo CDI 550 Medical Equipment?
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  Brittany CostaAug 18, 2025
  If the O2 calculation seems off on your Terumo Medical Equipment, check screen 5 in the “setup” mode and ensure that you have entered the correct patient BSA.
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Lindsey TurnerAug 21, 2025
What to do if saturation/hemoglobin values are off in Terumo CDI 550 Medical Equipment?
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  James JacksonAug 21, 2025
  If the Saturation/Hemoglobin values are off on your Terumo Medical Equipment, check screen 5 in the “setup” mode and make sure the Saturation, Hematocrit, and Hemoglobin offsets are being used correctly for your institution.
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Brian BaldwinAug 25, 2025
Why are there K[+] problems due to exposure of the shunt sensor to prime solutions with undesirable pH levels in Terumo CDI 550 Medical Equipment?
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  Angela WhiteAug 25, 2025
  If you're experiencing K[+] problems with your Terumo Medical Equipment because of the shunt sensor's exposure to prime solutions with undesirable pH levels (less than 7.0 or greater than 7.8), this pH level can interfere with accurate potassium measurement. To address this, isolate the sensor by adding it just before the initiation of CPB, or keep shunt lines closed.
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robertsmithAug 27, 2025
Why are there pH problems due to freezing temperatures in Terumo CDI 550 Medical Equipment?
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  Anna SchmidtAug 27, 2025
  If you are experiencing pH problems with your Terumo Medical Equipment, it might be due to freezing temperatures. This is because the buffer in the sensors can freeze. Check the freeze indicator on the sensor box to see if the sensors have been exposed to freezing temperatures.
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Lindsey LewisAug 30, 2025
What to do if blood flow rate is less than 35 ml/min in the CDI Shunt Sensor line of Terumo Medical Equipment?
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  Joseph LopezAug 31, 2025
  If the blood flow rate is less than 35 ml/min in the CDI Shunt Sensor line of your Terumo Medical Equipment, it may cause slow measurement response times. Restoration of the flow rate back above 35 ml/min will return the sensor readings to normal.
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tscottSep 3, 2025
What to do if there is minimum blood flow rate through the CDI H/S Cuvette in Terumo CDI 550 Medical Equipment?
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  patrickharperSep 3, 2025
  If you have minimum blood flow rate through the CDI H/S Cuvette of your Terumo Medical Equipment that results in less than optimal saturation/hematocrit readings, restoration of the flow rate back above minimum requirement will return the CDI H/S Cuvette readings to normal.
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vrangelSep 6, 2025
Why are there K[+] problems due to exposure of the shunt sensor to prime solutions with sodium measurement outside specified range in Terumo CDI 550?
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  kelly02Sep 6, 2025
  Sodium measurement less than 120 or greater than 160 mEq/L can interfere with accurate measurement of potassium.
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Brandon DoughertySep 9, 2025
What to do if lab temperature does not match temperature used by the laboratory for Terumo CDI 550?
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  Steven FreemanSep 9, 2025
  If the lab temperature does not match the temperature used by the laboratory for your Terumo Medical Equipment, you have to either store the comparison values at 37°C or change them to 37°C values after recalling them.

Terumo CDI 550 Specifications

General

Model	CDI 550
Device Type	Blood Parameter Monitoring System
Power Supply	100-240 V AC, 50/60 Hz
Dialysate Flow Rate	Not applicable
Manufacturer	Terumo
Measured Parameters	pH, pCO2, pO2, K+, Na+, Ca++, Hct
Measurement Method	Electrochemical
Display	LCD touchscreen
Connectivity	RS-232, USB, Ethernet
Storage Temperature	0°C to 45°C
Intended Use	Monitoring blood gases and electrolytes during cardiopulmonary bypass