𝙳𝚛𝚊. 𝙰𝚗𝚊 𝙻𝚊𝚞 🇲🇽 がリツイート

Dynamic ultrasound can reveal knee instability that static imaging may miss. 🔍🦵
During a combined maneuver (valgus stress + anterior drawer + tibial external rotation), ultrasound may show anterior translation of the medial tibial plateau followed by a sudden posterior snap of the posterior horn of the medial meniscus over the posterior tibial rim.
Interestingly, this can occur without a visible meniscocapsular tear on ultrasound or MRI, suggesting a dynamic functional instability of the posteromedial meniscus.
💡 Clinical pearl
This finding may represent an early stage of anteromedial rotatory instability (AMRI) and could precede the development of ramp lesions or longitudinal meniscal tears.
🧠 How I figured out a way to explore it
• Left hand: performs the anterior drawer
• Right hand: holds the probe on the posteromedial knee and applies valgus stress
• Body: stabilizes the foot and applies the tibial external rotation
Yes… it takes a few limbs. I like to call it “the octopus technique.” 🐙
Dynamic ultrasound = seeing knee biomechanics in real time.
#MSKultrasound #KneeInstability #AMRI #Meniscus #SportsImaging #MusculoskeletalRadiology
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