O'Donoghue's classic narrative on athletic knee injuries, focused on ligament and meniscal damage. It grades ligament sprains by loss of function and lays out the exam, mechanism, and surgical rationale. This is the paper that names and popularizes the "Unhappy Triad."
When an athlete plants the foot and takes a valgus blow, think MCL, ACL, and medial meniscus together, not in isolation. The exam sequence matters: test full extension first (most stable, least painful), then ~20 degrees of flexion to relax the posterior capsule and expose collateral instability, then the drawer test for the cruciates.
Remember the diagnostic rule: a positive drawer or gross lateral opening signals a COMPLETE tear. Partial tears feel stable, so a negative exam does not equal an intact ligament. The surgical teaching here is the durable one. Torn cruciates do not heal on their own, and repair done early (within about 10 days to 2 weeks) is what separates a functional knee from a failed one.
Examine early or under anesthesia before swelling and hamstring guarding hide the instability. A relaxed patient is essential, since hamstring contraction can mask a positive anterior drawer.
O'Donoghue's classic narrative on athletic knee injuries, focused on ligament and meniscal damage. It grades ligament sprains by loss of function and lays out the exam, mechanism, and surgical rationale. This is the paper that names and popularizes the "Unhappy Triad."
When an athlete plants the foot and takes a valgus blow, think MCL, ACL, and medial meniscus together, not in isolation. The exam sequence matters: test full extension first (most stable, least painful), then ~20 degrees of flexion to relax the posterior capsule and expose collateral instability, then the drawer test for the cruciates.
Remember the diagnostic rule: a positive drawer or gross lateral opening signals a COMPLETE tear. Partial tears feel stable, so a negative exam does not equal an intact ligament. The surgical teaching here is the durable one. Torn cruciates do not heal on their own, and repair done early (within about 10 days to 2 weeks) is what separates a functional knee from a failed one.
Examine early or under anesthesia before swelling and hamstring guarding hide the instability. A relaxed patient is essential, since hamstring contraction can mask a positive anterior drawer.