How to setup non invasive monitoring

Quick reference guide for getting started

LiDCO non invasive setup guide

using continuous non invasive blood pressure (CNAP)

How to setup the LiDCO hemodynamic monitor for non invasive monitoring in ten simple steps.  Read below or watch the YouTube video.

Step 1: Power on the LiDCO monitor

• Connect the power supply (optional)
• Power on using the button underneath the monitor
* when A/C power is not available, the monitors battery can offer 3hrs of operation when fully charged.

power on monitor


Step 2: Select Rapid & CNAP

• Select “R” for the LiDCOrapid trend of Hemodynamics, and
• Select “C” for CNAP (Continuous Non-Invasive Arterial Pressure) from the finger
• The wedge will turn from blue to green when selected.
• Press the white check mark in the center of the wheel to confirm and move

CNAP Rapid wedge 2

Step 3: Enter patient details

• Enter Pt. ID number, age, height, weight, gender and patient type
• Press the green forward arrow* to enter monitoring mode
*If the arrow isn’t green, go back to complete all details

CNAP patient details

Step 4: Select NIBP option

1) Select “External NIBP” in CNAP settings if you will calibrate with the hospital BP arm cuff. Apply it to either arm.

External NIBP select

2) Un-Select “External NIBP” if you will calibrate with the arm cuff attached to the LiDCO. Attach the black airhose from the LiDCO to the appropriate size cuff, and apply the cuff to either arm.

Arm cuff hose connect

Step 5: Attach CNAP to patient

• Place the patient’s index finger onto the sizing gauge on top of the cuff controller to determine the correct cuff size (S/M/L). 
*the cuffs should slide easily over the knuckles without resistance
• Position the finger cuffs at the base of the pointer, middle and ring finger
• Connect finger cuffs to cuff controller (black) & cuff controller to monitor cable (orange)
• Fasten cuff controller to forearm with strap provided
*if the arm will be tucked during surgery, ensure the pt is padded to avoid any potential compression injuries.

NI on fingers 


Step 6: Begin signal acquisition sequence

• If possible, assure the Cuff controller is at the level of the Right Atrium
• Press the green button in the Blood Pressure Channel to start the CNAP signal acquisition
*if the arrow remains grey, check all connections, and observe the area at the top of the screen for troubleshooting messages.

CNAP green button


Step 7: Calibrate with most recent Arm Cuff measurement

If setup for external NIBP, enter values for systolic and diastolic for NIBP when prompted

External NIBP Enter Sys Dia

If setup for 
LiDCO NIBP cuff, this step is automated

Step 8: View perfusion index

• This indicates the relative strength of perfusion in the finger. You need at least one green box for the measurement to proceed.
• The further to the right the green box is, the stronger the pulse signal.

View perfusion index


Step 9: View CNAP finger signal acquisition

• One finger cuff will inflate and deflate several times as the monitor senses the patients pulse. Observe as the red line on the pressure graph moves slowly up and down as the finger cuff inflates and deflates.
• Next, the finger cuff will begin to counter-pulse and display an arterial waveform (~90 seconds total)
• The CNAP has successfully detected the blood pulsatility in the finger.

CNAP finger signal acquisition


Step 10: View ALL trended values

• Observe NIBP arm cuff measurement used for calibrating the LiDCO finger sensors appears in parenthesis below the current finger cuff pressure measurement
• Observe continuous trending of all measured parameters: CO, CI, SV, SVR, SVV, PPV, & Event response % Change.

View parameters from CNAP

Got a question?  Need some help?

Call us now on +1 847-265-3700 or email us and we'll get back to you 'stat!'

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