Meniscal Repair

For Medical Students

What It Tests

After a meniscal repair the examination is checking whether the repair has healed, whether the knee has stiffened, and whether the symptoms that led to the repair have gone. 4.9.10 covers meniscal deficiency.

The examination is restrained in the early months, because the provocation tests load the repair. 4.9.3 covers the McMurray test.

It matters that a repair is protected differently from a trim, so the rehabilitation stage governs what is examined. 4.2.34 covers previous rehabilitation.

How It Is Performed

Establish what was repaired, where, with what, and how long ago. 4.2.30 covers previous surgery.

Look at the scars and ask about any concurrent procedure, since a repair is often done alongside a reconstruction. 4.3.7 covers surgical scars.

Assess the effusion, because a recurrent effusion after the early weeks suggests the repair has not healed. 4.8.3 covers the bulge sign.

Measure the range, recording flexion, since deep flexion is restricted early and should recover. 4.7.10 covers the post operative range assessment.

Palpate the joint line on the repaired side, which is the most useful localising sign. 4.6.4 covers joint line tenderness.

Defer the meniscal provocation tests until the protected period has passed, and record that decision. 4.9.3 covers the McMurray test.

Assess for a mechanical block, since a failed repair can displace. 4.2.5 covers locking.

What a Positive Means

A settled knee with a recovering range, no effusion and no joint line tenderness is the expected course.

Joint line tenderness with a recurrent effusion after the early months suggests the repair has not healed. 4.9.10 covers meniscal deficiency.

A mechanical block suggests the repaired fragment has displaced, which is urgent. 4.2.5 covers locking.

A restricted deep flexion at the expected stage is a rehabilitation finding rather than a repair failure. 4.7.10 covers the post operative range assessment.

A knee with no meniscal findings and persistent pain raises a cause other than the repair, including the cartilage. 4.17.5 covers articular cartilage defects.

MRCS Level

How It Is Performed

In a viva this is the post meniscal repair station and the expected answer names the protected period before any test.

The expected points are the operation and its date, the scars, any concurrent procedure, the effusion, the range with flexion recorded, the joint line, the deferred provocation tests and the mechanical history.

Say that you would not perform a deep flexion provocation test during the protected period, and give the reason. 4.9.3 covers the McMurray test.

Say that you would ask about a concurrent cruciate reconstruction, since the two are often combined. 4.20.1 covers that assessment.

Say that a failed repair and a settled repair can look alike early, which is why the timeline matters. 4.2.9 covers the onset.

What a Positive Means

The reasoning expected is that a repair depends on healing across a surface with a limited blood supply, so the location of the tear predicts the result. 3.6.13 covers meniscal repair biomechanics.

Deep flexion and rotation load the repair, which is why the protected period restricts both the rehabilitation and the examination. 3.6.5 covers load sharing.

A healed repair restores the hoop mechanism, which is why repair is preferred to excision where it is possible. 3.6.2 covers hoop stress.

A failed repair behaves like an untreated tear, so the examination returns to the meniscal findings. 4.9.10 covers meniscal deficiency.

How Good It Is

The examination detects a displaced failed repair reliably and a quietly unhealed one poorly.

Its best contribution is the joint line tenderness and the effusion together, which raise failed healing before any imaging is arranged. 4.6.4 covers joint line tenderness.

It cannot assess healing directly, and a repair that has not healed can be symptom free.

Magnetic resonance imaging after a repair is itself difficult to interpret, so neither the examination nor the imaging settles healing with confidence. 4.1.6 covers that relationship.

No figures appear for any accuracy comparison on this page, under decision 023, and the comparison is the claim being made.

FRCS Level

How Good It Is

At decision level the examination separates a healed repair, an unhealed one, a stiff knee and a different problem.

Mechanical symptoms with joint line tenderness after the protected period point to a failed repair, and the examination is where that is raised. 4.2.7 covers mechanical symptoms.

A stiff knee with a quiet joint line is a rehabilitation problem and the end feel is what separates a contracture from a block. 4.7.5 covers the end feel.

Pain without meniscal findings raises the articular surface, and a repair does not protect against that. 4.17.5 covers articular cartilage defects.

A repair done alongside a reconstruction is examined for both, since either can be the source. 4.20.1 covers that assessment.

Where It Misleads

The commonest error is performing a provocation test during the protected period and loading the repair. 4.9.3 covers the McMurray test.

Early restricted flexion is read as a failure rather than as the protocol. 4.7.10 covers the post operative range assessment.

An unhealed repair with no symptoms is called a success, which is true functionally and not structurally. 4.9.10 covers meniscal deficiency.

Joint line tenderness persists after any meniscal surgery, so its presence alone means little. 4.6.4 covers joint line tenderness.

Pain from a concurrent cartilage lesion is attributed to the repair. 4.17.1 covers the cartilage presentation.

Fellowship Level

Where It Misleads

At fellowship level the examination cannot answer whether the repair healed, and that is the question being asked.

Clinical success and structural healing diverge, and the examination measures the first while the decision often wants the second. 4.9.10 covers meniscal deficiency.

Joint line tenderness after meniscal surgery is so common that it has little discriminating value, which removes the examination's best localising sign. 4.6.4 covers joint line tenderness.

A re-tear and an unhealed repair present identically, and only the timeline distinguishes them. 4.2.9 covers the onset.

A concurrent reconstruction changes the expected findings for both procedures, and the examination tends to attribute everything to one. 4.20.1 covers that assessment.

Root repairs behave differently from peripheral repairs, so the same protocol and the same examination do not apply to both. 4.20.3 covers the root repair assessment.