Butterfly Network iQ - Using Spectral Pulsed-Wave Doppler Mode

• Adjust the Depth and Gain
• Perform time, distance, and heart rate measurements on the display
Accessing M-Mode
1. Select your desired preset and identify the area you'd like to image. Note that imaging will begin on B-Mode.
2. Select Actions on the bottom of the imaging screen.
3. Under Modes, select M-Mode.
6.4. Using Spectral Pulsed-Wave Doppler Mode
Spectral Pulsed-Wave Doppler (Pulsed Doppler) is a quantitative mode that graphically displays blood flow velocity
measurements over time.
When using Pulsed Doppler, you can:
• View and adjust the position of the sample volume by holding and dragging the gate.
• View and adjust the angle correction by holding and dragging the white caliper dot.
• Switch between live Pulsed Doppler mode and live B-mode by touching the Start Spectrum/Update B-mode
button.
• Adjust gain of spectral trace by dragging finger left and right on the trace while trace is live.
• Adjust the Scale to optimize for high or low flow by touching the Low Flow/High Flow control in the middle of the
screen. Note that the control defines your current state.
• Adjust the Scroll Speed of the Spectral Doppler trace by touching the Slow Scroll/Fast Scroll control in the
middle of the screen. Note that the control defines your current state.
In order to adjust the Gain and Depth of the B-mode reference image, exit Pulsed Doppler mode and optimize image
in B-mode, Color Doppler mode, or Power Doppler mode.
Placing the Sample Volume
1. Hold and drag the sample volume gate (the square region in the center of the arrow) to the desired location
within the vessel of interest.
2. Once positioned, align the direction of the arrow along the direction of flow. If the flow in the vessel is cranial,
point the arrow cranially. An example of an appropriately aligned flow in the Carotid Artery (left) and Internal
Jugular Vein (right) is given below.
CAUTION!
Flow directionality is represented relative to the direction of the arrow. Misalignment of the
arrow may lead to misinterpretation of flow direction. Carefully check that the arrow is aligned
with the expected blood flow direction.
Using Spectral Pulsed-Wave Doppler Mode
Using Modes 33