Deltex Medical CardioQ-ODM User manual

Using the CardioQ-ODM Monitor in the OR
© Deltex Medical 2013
9051-5480 Issue 3
7.Locate descending aortic waveform (gently
rotate or adjust depth as necessary).
8.Optimise waveform (sharpest sound, tallest
peaks, spectrum of colours).
9.Use Auto gain if necessary.
1.Turn on the CardioQ-ODM (use the switch at the back of the monitor).
2.Attach a probe to the interface cable.
3.Select “New Patient”.
4.Input patient data (patient ID, gender, age, weight, height). Use Control Knob to input
data and press enter, check and then accept data.
5.Apply water-based lubricant to distal part of probe.
6.Insert probe, bevelled edge upwards (patient incisors usually between distal & middle
markers for oral insertion or middle & proximal for nasal insertion).
Oral Insertion Nasal Insertion

The CardioQ-ODM Waveform
The green line indicates the velocity/time envelope which the monitor uses to make calculations. The white arrows
indicate time and velocity values used for CardioQ-ODMTM calculations.
The Stroke Distance (SD) is the area under the waveform and is the basic measured parameter upon which calculations of
Stroke Volume (SV) and all other Cardiac Output (CO) and indexed measurements are made. Stroke Volume is the parame-
ter of choice for fluid management protocols, however changes in Stroke Distance (SD) or Stroke Volume Index (SVI) can
also be utilised.
The waveform base, (flow time) depends on heart rate, left ventricular filling and afterload. The flow time corrected to a heart
rate of 60bpm (FTc) is inversely correlated with the systemic vascular resistance (SVR).
FTc is often used as an indicator of hypovolaemia and fluid responsiveness, however during anaesthesia the vasodilatory
effects of anaesthetic agents should be considered. Under anaesthesia or other vasodilators there may be a decrease in
left ventricular afterload such that the baseline FTc may be elevated above the normal range (330 to 360 ms). A longer FTc
may also be seen in conditions associated with a low SVR eg sepsis and pregnancy.
If FTc does not increase after an appropriate fluid challenge, other causes of vasoconstriction, (eg excess vasopressors,
cold temperature, or obstructed circulation such as pulmonary embolus) should be considered.
Fluid Management
NO
NO
YES
YES
SV/SD
Decrease
>10%
SV/SD
Increase
>10%
Monitor SV/SD & FTc
Stroke Volume or Stroke
Distance Optimisation
Monitor SV/SD & FTc
200ml Fluid Challenge over
5 minutes
Deltex Medical
Tel: [phone]
www.deltexmedical.com
Typical Parameter Values
(These values should not be confused
with a physiological target)
Flow Time Corrected (FTc)
330 - 360 milliseconds
NB -The effects of vasodilating
drugs may elevate the FTc (see
above).
Peak Velocity (PV)
20 years 90 - 120 cm/s
30 years 85 - 115 cm/s
40 years 80 - 110 cm/s
50 years 70 - 100 cm/s
60 years 60 - 90 cm/s
70 years 50 - 80 cm/s
80 years 40 - 70 cm/s
90 years 30 - 60 cm/s