Ultrasound tutorial – Flexor Tendon Ultrasound (PTT, FHL, FDL)

Flexor Tendon (PTT, FDL, FHL) Ultrasound in The Ankle – Technique and Findings

Positioning

• Lateral decubitus or frog leg

Ultrasound probes

• Hockey stick probe
  • Easiest to position
  • Good resolution
• High frequency linear probe
  • Larger field of view
  • Sometimes difficult to position optimally

Normal Appearance

• Consistent thickness
• Fascicular architecture

Pathology

• Tendinosis
  • Hypoechoic
  • Thickened
  • Loss of fascicular architecture
• Tear
  • Partial/full thickness
    • Fluid (anechoic) extends into the tear