Back

Thermodilution - Cardiac Output

Measurement of cardiac output (CO) by the thermodilution method in large animals

   

 

 

Measurement of cardiac output (CO) by the thermodilution method in rats

   

 

CARDIOMAX III

The CARDIOMAX III

Features / Specifications:

  • Cardiac Output in animals from mice to horses
  • Monitors heart rate with EKG or blood pressure sensors.
  • Calculates stroke volume
  • Measures and displays two (2) systolic, diastolic and mean pressures, dp/dt.
  • Equipped with EKG amplifier. Monitors, displays, and stores EKG curve.
  • Adaptable to most thermistor catheters
  • Can be equipped with Columbus Instruments' Microprobes for cardiac output measurements in mice and rats
  • Can trigger Columbus Instruments' Auto-Injectors for semi-automatic measurements.
  • Remote foot switch can initiate a measurement cycle.
  • Functions as a physiological data logger, storing HR, BT, DP, MP, SP in programmable intervals.
The new Cardiomax-III thermodilution cardiac computer interfaces directly to a Pentium desktop or laptop computer via a very fast RS-232 link. It is intended to be used on a variety of lab animals from mice to horses. In addition to measuring cardiac output and associated parameters (SV, HR), the Cardiomax-III can be used to measure, display, and log ECG (EKG) with its own low level amplifier and two (2) blood pressures (DP, MP, SP, dp/dt). Storage of all parameter data is provided in comma separted ASCII format for easy import into a variety of analysis programs. The thermo-dilution curve image can also be saved. The Cardiomax-III can use a variety of thermistor catheters as well as Columbus Instruments' thermocouple microprobes. The Cardiomax-III's special design makes it resistant to external radio signal interference and its small size (35.5 x 29 x 10 cm) makes it very convenient in a crowded laboratory environment.
   

Isolated inputs
(All isolated inputs have over 1500v of low leakage isolation to the chassis and computer connections.)

Catheter Input
Type: "T" thermocouple or 14k - 7k ohm thermistor
Range: 0 to 50 degrees C.

Injectate Input
Type: "T" thermocouple or 14k - 7k ohm thermistor
Range: 0 to 50 degrees C

ECG Input
Three lead: LA, RA, RL
Range: 50uV to 2mV peak to peak

Blood Pressure Inputs (2)
Range: -100 to + 300 mmHg
Resolution: 1 mmHg,
Accuracy: +/-0.5% full scale, +/-1mmHg
Transducer sensitivity: 5 uV/V/mmHg
Transducer nominal impedance: 300 ohm
Transducer Excitation: 4 volts

Non-isolated connections

High Level ECG Input:
Two ranges: +/-0.25 volt, +/-1.25volt
Foot switch input for starting a C.O. measurement cycle remotely
Injector trigger output for automated C.O. injection
Computer RS-232 serial port connection: 19200 baud

Power requirements
12 watts
120VAC, 60Hz; 240VAC, 50Hz (Factory Selected)
Fuse: 1/2 ampere, type MDA

Dimensions:
Size: 14" x 11.5" x 4" (35.5 x 29 x 10 cm)
Weight: 6 lbs. (2.72 kg)

Ordering Information
TCR Cardiomax III-TCR Thermodilution Cardiac Output for mice, rats and large subjects
TC Cardiomax III-TC for Thermistor Catheters ONLY for larger animals only. Not suitable for rodents
R Cardiomax III-R for Micro-Probes ONLY for small animals only. Requires use of CI Microprobe(s)
Cardiomax III remote foot switch
Cardiomax III replacement Injectate Probe (RTD)
Cardiomax III replacement Injectate Probe (thermocouple)


HUGO SACHS ELEKTRONIK-HARVARD APPARATUS GmbH
Gruenstrasse 1 · D-79232 March-Hugstetten · GERMANY
Phone: +49 (0) 76 65 - 92 00-0 · Fax: +49 (0) 76 65 - 92 00-90