HP CFL-512 User Manual

Leycom® CFL-512 and Conduct NT
CD Leycom September 2004
The LEYCOM® Cardiac Function Lab CFL-512 facilitates the on-line measurement and analysis of ventricular pressure and volume signals in clinical setting. The pressure and volume signals are obtained using a combined conductance and pressure catheter. The CFL-512 acquires and displays these signals on-line and continuously. The signals are digitized, stored and can be subsequently played back and analyzed the users convenience.
The Leycom
®
CFL-512 is a stand-alone device, which can be easily used in
different clinical environments. The system, including the software for data acquisition and analysis, has been developed in close co-operation with a group of clinical users of Leycom
The Leycom
®
CFL-512 consists of a bedside 'patient module' and a console.
®
equipment.
The bedside 'patient module' is a state of the art, battery powered, data acquisition module. The module, to which the conductance catheter is connected, contains sophisticated circuitry, which ensures optimal patient safety and extended battery life. The 'patient module' is communicates with the Leycom a fibre optic cable; this provides complete patient isolation from electrical hazard.
dedicated computer
The
is Intel Pentium based, has a 40 Gb harddisk, enough for hundreds of hours of data acquisition, at 12 channels and 250 samples per second.
With the Leycom
®
CFL-512 software, time-varying ventricular volume,
pressure, ECG, a large number of hemodynamic variables and Pressure-volume loops can be displayed. The slope and intercept of the end-systolic pressure­volume relation (a measure of ventricular performance) are calculated, as well as other related variables.
®
CFL-512 console via
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CFL-512
Conduct NT – for clinical evaluation only
Features
Dyssynchrony calculation for each segment
Many calculated indices, displayed in real time
Operator independent parallel conductance calculation
Ability to show calibrated data in real time
Improved screen and reports printouts
Analysis of large files
Easier to 'grab' screens for presentations or publications
Improved study management
Extended patient data input screen
Extended views
A Microsoft Windows based acquisition, display and analysis program has been developed for the Leycom Leycom quantitative cardiac function assessment in humans. The new program, Conduct NT, replaces and radically improves upon the old DOS based 'Conduct 2000' for the Leycom
®
CFL-512 is the clinically approved system for
®
CFL-512.

Usage in the clinical setting:

®
CFL-512. The
The quantitative assessment of systolic and diastolic heart failure
Determination of heart failure treatment strategy
Calculation of ventricular mechanical dyssynchrony
To guide pacing strategies
Status assessment of congenital heart disease
Evaluation of surgical procedures (DOR procedure, mitral valve repair)
Monitoring critical patients peri-operatively
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CFL-512
Conduct NT – Analyse Recorded Data

Conductance Catheter Settings

Match the catheter with the actual heart size, exclude individual segments and optimize the dual field setting.
Rho measurement
The Rho cuvette is used to measure blood resistivity from a blood sample. Blood resistivity is required for the calibration of the volume measurements. The Rho cuvette is connected to the connector on the right side of the CFL-512. When the Rho cuvette is filled with 5 ml of blood the display will show the measured blood resistivity. By pressing the button next to the display this value is stored internally and used in the real-time volume calculation.

Calibration

Calibration of the volume signals from the conductance catheter is automatic. However, the 6 user defined signals connected to the external inputs, Pressure, ECG 2, Aux1, Aux2, Aux3 and Aux4 require initial calibration to enable the software to convert input signal voltages to user units (e.g. mmHg).
Display
Select display-mode and time-base for an optimal view of your chosen signals. View ‘Segmental Volumes’ to check and optimise the (segmental) volume signals. Use views with ‘PV-Loop’ to monitor the pressure-volume loops from beat to beat. Use views with ‘Indices’ to display real-time the calculated indices. Use ‘Dyssynchrony’ view to assess mechanical ventricular dyssynchrony.
Acquire Data
Start data acquisition by clicking ‘Acquire’. An audible signal every 1 s reminds the user that acquisition is in progress. Stop data acquisition by clicking acquire again. Enter a comment at the end of each acquisition run.
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CFL-512
Conduct NT – Analyse Recorded Data

Select data file

Retrieve previously acquired data files for subsequent analysis. The comment and some file characteristics are displayed in the list.
Pressure-volume analysis
The end-systolic and end-diastolic PV points are indicated with markers (blue and green lines). Appropriate (user-selected) functions can be fitted through these points taken and varying pressures and volumes to calculate contractility and compliance.
Print Report
Create your own print reports with indices. Select the reports you want to print.
Use the short-cut button
to print the latest report.
Indices
Create your own indices-display by selecting the indices that are available in the list. Conduct NT has more than 50 parameters in his list of indices.
Volume calibration
Vc calculation (parallel conductance)
Vc will be calculated automatically from the data acquired during a hypertonic saline injection.
Alpha calculation
To correct the underestimation of true volume, the results measured by the conductance catheter should be compared to the results of an independent cardiac output measurement, thermodilution, echo or angiography for example.
Additional features in Conduct NT…..
Interval measurement
Several filters can be used
Exporting data and indices to comma-separated file
Beat to beat analysis
Complete file management
Signals can be individually scaled.
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u
CFL-512
Highlights
Hardware Software
Console
Pentium, 1 GHz with 256 Mb RAM
Dedicated hardware for:
Acquisition of external signals Communication with patient module Patient module battery management
Monitor, NEC Multisync XP 1750
Data storage, 40 GB harddisk
250 Mb Zip drive
Laser printer, HP LaserJet 2100
Drip-proof keyboard with trackball and two buttons
Patient module
All settings are software controlled
Catheter connector: 16 pole Binder
Battery powered to ensure patient safety
More than 180 min continuous use when fully
charged
Communication with console via fiber optic cable
AD conversion: 250 samples/sec, 12 bit
Patient safety
Battery powered patient module
Communication via fiber optic cable
Inductive battery charger
Conduct NT
Real-time display various display modes variable time-base
Several filters
Data acquisition
automatic file naming attached comments 250 samples/sec, 12 bit accuracy 8 internal (patient module) and 6 external channels
Calibration of external signals conversion to user units optimize resolution
Display of acquired data
Calculation of calibration factors for conductance-
volume
Analysis of pressure-volume relations
Calculation of hemodynamic indices
Print/save graphs and own reports
Printer settings
Data export

CD Leycom

Argonstraat 116 2718 SP Zoetermeer Tel. +31 79 3601780 Fax. +31 79 3621743 Email : support@cdleycom.com Website : www.cdleycom.com
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