• vikas
  • New member
  • Offline
  • Registered: 2010-07-14
  • Posts: 1

Topic: Pulse wave mode and triggering to R wave

Dear UDS

System: Acuson Aspen

I want to trigger a scan of a brachial artery to the r wave of the ECG (which I can do) and then I want to go into PUlse Wave mode to get the doppler flow trace at the bottom of the screen (which I can do separately)

However, my issue is that the image then untriggers from the ECG and is pulsatile again (I need it to be triggered to the R wave so that I can do some offline analysis for flow-mediated dilatation).

Also, when I am in pulse wave mode, the image of the artery is small (at the top of the screen) and the pulse wave signal is very large and takes over half the screen -- is there a way of making the image much larger and the pulse wave trace smaller

Many thanks

Vikas

  • Todd
  • Administrator
  • Offline
  • From: Oceanside, CA
  • Registered: 2009-02-05
  • Posts: 279

Re: Pulse wave mode and triggering to R wave

Vikas,

I will need some time to research your first few questions, but I can explain the spectral sizing fairly quickly.

Please refer to the images below.

Enter the setup menu by pressing the Setup Key.
http://www.u-d-s.com/personal/Setup%20Key.jpg

Scroll down to "Strip Modes", press Select.
http://www.u-d-s.com/personal/StripMode.jpg

Choose "1/3" size for Spectral Default:
http://www.u-d-s.com/personal/ChangeSize.jpg

Select "EXIT" to return to the imaging screen after changing the default size:
http://www.u-d-s.com/personal/SpectralExit.jpg

Verify correct sizing in Pulsed Wave Doppler:
http://www.u-d-s.com/personal/SpectralScale.jpg

Universal Diagnostic Solutions

Todd's Website

  • Todd
  • Administrator
  • Offline
  • From: Oceanside, CA
  • Registered: 2009-02-05
  • Posts: 279

Re: Pulse wave mode and triggering to R wave

I'm trying to duplicate what you're saying, about how every time you go into pulsed wave it removes the R Trig. Checking the user manual and it says this about using triggers: "You can use triggers to update the 2-D or Color Doppler image at regular intervals. There are two types of triggers: timed triggers and ECG-based
triggers." It does not mention using spectral Doppler to set triggers on an ECG/AUX trace.

I do not think that the system has the capability to display all the information you need in both the 2-D and spectral Doppler modalities. I will continue to research this during my work today and see if I can find a solution, or a more definite conclusion.

Universal Diagnostic Solutions

Todd's Website