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CDI® 550

Blood Parameter Monitoring System


Real-time monitoring of DO2 as one of 12 key blood parameters

The proven technology of the CDI® Blood Parameter Monitoring System 550 delivers continuous blood parameter readings, providing early detection of changes in patient status during cardiopulmonary bypass surgery.

CDI® System 550

Based on optical fluorescence and reflectance technologies, the CDI® System 550 continuously measures or calculates 12 critical blood parameter values during cardiopulmonary bypass. Access to continuous information is a key advantage in optimum patient management because it enables clinicians to react without delay to changes in blood parameter values.

Easy Set Up and Calibration

There is no warm-up time required for installation or calibration. Installing the sensor in the shunt line requires a few, simple luer connections. The shunt sensor also can be added after the initiation of bypass, facilitating set up in emergency cases.

System Features
  • Self-diagnostic system verifies proper functioning of electronics and optics.
  • System alerts provide visual and audible indicators when parameters fall outside user-specified limits.

General specifications

​Displayed parameters
​System Operating Ranges
​System Display 
​6.80 to 7.80 pH units
​6.50 to 8.50 pH units
​pCO2​10 to 80 mmHg
(1.3 to 10.7 kPa)
​10 to 200mmHg 
(1.3 to 26.7 kPa)
​pO2​20 to 500 mmHg
(2.7 to 66.7 kPa)
​10 to 700 mmHg
(1.3 to 93.3 kPa)
3.0 to 8.0 mmol/L​​1.0 to 9.9 mmol/L
​Temperature​15.0° to 45.0° C
​1.0° to 45.0° C
​Oxygen saturations (SO2)​60 to 100%
​35 to 100%
​Hematocrit (Hct)​15 to 45%
​12 to 45%
​Total hemoglobin (Hgb)​5.0 to 15.0 g/dl
​4.0 to 15.0 g/dl
​Oxygen consumption (VO2)​​10 to 400 ml/min
​10 to 400 ml/min
​Oxygen Consumption

​1 to 999 ml/min/m²
​Oxygen Delivery (DO2)
​10 to 2000 ml/min
​10 to 2000 ml/min
​Oxygen Delivery (Indexed)
​1 to 2000 ml/min/m²
​Base Excess (BE)
​-25 to 25 mEq/L
​-25 to 25 mEq/L
​ Bicarbonate (HCO3)​0 to 50 mEq/L
​0 to 50 mEq/L
​Blood Flow (Q)

​0.0 to 9.9 L/min
​Product Specification
​Size (H x W x D)
​Monitor with BPM and H/S probe
28 cm x 38 cm x 17 cm
​32 cm x 21 cm x 26 cm
​Monitor power requirements and specifications
​100 - 240 VAC, 50/60 Hz
​12 V backup battery
​Data output port RS-232 serial interface
​Pumping systems input port: RS-232/ RS-485 serial interface
​System measurement cycle time​pH, PCO2, PO2 = one measurement per second
​K+= one measurement per six seconds
SO2, Hct Hgb = one measurement per eighteen milliseconds​
​System display update​Every six seconds

Item specifications

​The CDI® System 550 is comprised of the following components

DescriptionCatalog #​​Units/Case
​Monitor with one blood parameter module and one H/S probe​550AHCT​1


Description​Catalog #​Units/Case
​Monitor with two blood parameter modules and one H/S probe​550AVHCT​1
​Monitor Pole Clamp, 7,0" (17,8 cm) arm length, calibrator mount*
​Cable head bracket*

Accessories for use with the CDI®System 550*

Description​​Catalog #Units/Case
​ ​Calibrator.PNG
​Gas A, calibration gas for use with Calibrator model 540​​CDI506​1
​Gas B, calibration gas for use with Calibrator model 540​CDI507​1
​Printer paper​​7310​5

Single-use devices for use with CDI® System 550*

Description​​Catalog #Units/Case
​ ​ ​ ​ ​ ​CDI H_S Cuvette.png​CDI H/S Cuvette 1/4" x 1/4" mm (6,4)
​CDI H/S Curvette 3/8" x 3/8" mm (9,5)
​CDI H/S Cuvette 1/2" x 1/2"mm (12,7)
​CDI H/S Cuvette 1/4" x 1/4" mm with 6" (15,2 cm) extension tube​6934​10
​CDI H/S Cuvette 3/8" x 3/8" mm with 6" (15,2 cm) extension tube​6933​10
​CDI H/S Cuvette 1/2" x 1/2" with mm 6" (15,2 cm) extension tube
​ ​ ​CDI500 ShuntSensor.png
​CDI Shunt sensor, Heparin-treated
* These devices are also compatible with the CDI® System 500.

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This webpage can include promotional content regarding one or several products of Terumo Europe, or some procedures concerning the use or implantation of such products. This webpage is exclusively intended for healthcare professionals and is in no event directed to the general public