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5.05: Zone F3 – Mid Procerus

YOUR ASSIGNMENT FOR THIS LESSON

✅ Step #1: Review all content below.

✅ Step #2: Image the F3 zone on your own with your ultrasond, and using the checklist provided on this page, check off all key structures to be identified in this location

TRANSDUCER POSITION AT F3

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STANDARD F3 ORIENTATION:
TRANSVERSE

Locate this zone by first locating the procerus by asking the patient to frown. The mid-point of procerus contraction (mid-glabella) is the location of F3.

QUICK TIP
  • Around the nose, using lots of gel is critical. The natural contours of the nose will often make it impossible to keep consistent contact between the probe and the skin. By filling any gaps between the skin and the probe with gel, you can acquire more consistent images!

EXAMPLE OF IMAGE ACQUIRED AT F3

Srandard image acquired at F3. See key below for lables.*

ANATOMICAL LEGEND FOR F3 LOCATION

*Standard image acquired at F3 labeled with key anatomical structures.

KEY VESSELS IMAGED AT F3

Key vascular anatomy at F3 is the paracentral and supratrochlear a.

DOPPLER IMAGE ACQUIRED AT F2 OF KEY VESSELS

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QUICK TIP
  • If you can locate the corrugator supercilii muscle deep to the procerus, you will most often find the supratrochlear artery in this location, often deep to the procerus but at the level of the corrugator supercilii.
  • The vessels here are small. This means they are easily occluded and only seen at high frequencies. Use very light pressure and lots of gel to maximize your chance for success!
  • It can still be very hard and sometimes simply impossible to image vessels at F3. If you do see vessels here, then it is helpful clinical information. It does not preclude their presence in the imaged region if you do not see them.

DO IT YOURSELF CHECKLIST

Structures to Identify on Ultrasound for F3

Once you have completed this checklist, mark this part of the lesson as complete.