Arthrometer Insights

In ACL tears hyperlax patients, the familiar heuristics behind Lachman grading, anterior drawer feel, and even pivot shift can break down because “normal” may already include large excursions. When generalized joint hypermobility or constitutional hyperextension exists, a large translation is not automatically pathologic, and a small side-to-side difference can still represent clinically relevant loss of […]

Choosing between manual and objective stability tests is rarely about “which is best” and almost always about what clinical question you are trying to answer. In day-to-day practice, Lachman, pivot shift, and instrumented measurements all assess ACL function, but they probe different biomechanics and fail in different ways. This comparison explains how to use Lachman

After surgery, a stable-feeling knee does not always equal a stable knee, and a “loose” measurement does not always mean a failing graft. ACL reconstruction follow-up testing helps clinicians distinguish normal recovery variation from clinically relevant instability by combining symptoms, examination, functional progress, and selected imaging. This matters when you are counseling athletes who feel

Not every anterior cruciate ligament injury announces itself with a loud “pop.” In real-world practice, ACL tear without pop is a common source of diagnostic delay, especially when swelling is mild, the athlete finishes the session, or the story is vague. This creates the perfect conditions for a knee instability without pop presentation to be

Rotational giving-way after ACL injury is not always explained by the ACL alone. The anterolateral complex knee is a functional set of lateral and capsular restraints that can influence how the tibia translates and internally rotates under load, shaping the pivot shift mechanism that clinicians feel at the bedside. Understanding this region matters when an