Search our site 
 
Advanced Search
 
Home | Exam dates | Contact us | About us | Testimonials |
 
 

map
You are in Home >> Resources >> Clinical anaesthesia >> Cardiac Output


CardioQ monitor

Created: 14/9/2005
 
The CardioQ uses an interactive monitor. The screen displays the waveform which confirms optimal probe position. There is a continuous display of the patient's haemodynamic parameters.

The CardioQ's default display parameters are

 CO (cardiac output)
 SV (stroke volume)
 FTc (corrected f low time)
 PV (peak velocity)
 MD (minute distance)
 HR (heart rate)

CardioQ waveform and measured variables



With the exception of systemic vascular resistance, any six of the above parameters can be displayed at once and all are automatically trended. A navigator control knob is rotated to browse the menu and pushed to select. This includes the input of patient biometric data into the fixed stored nomogram that is used to estimate aortic cross sectional area. Speakers are included in the unit which gives an audible display of the doppler frequency shift spectrum produced by red blood cells moving in the path of the ultrasound beam. Listening to the audible signal aids optimization of the waveform.

Spectrogram


All newer generations of doppler equipment contain sound frequency or velocity spectrum analyzers for hard copy recording. They display a spectrum of the various velocities present at anytime and are, therefore, called spectral velocity recordings. This results in the typical waveform seen on the monitor of blood flow velocity in the descending thoracic aorta. The display is accomplished by microcomputers that are able to de-code the returning complex doppler signal and process it into its various velocity components. There are two basic methods for accomplishing this. The most popular is Fast Fourier Transform and the other is called Chirp-Z Transform.

How to use the CardioQ monitor (streaming video)
ArticleDate:20050914
SiteSection: Article
 
   
    
                                            
  Posting rules

     To view or add comments you must be a registered user and login  




Login Status  

You are not currently logged in.
UK/Ireland Registration
Overseas Registration

  Forgot your password?








 
All rights reserved © 2020. Designed by AnaesthesiaUK.

{Site map} {Site disclaimer} {Privacy Policy} {Terms and conditions}

 Like us on Facebook 

vp