True buckling — where the knee actually collapses under your weight — almost always indicates a structural injury. The pattern of when it gives way reveals the cause.
📍 Sector 69, SAS Nagar (Mohali), Punjab · Serving Chandigarh Tri-City
Dr. Harjoban Singh — the only FIFA-approved orthopaedic surgeon in the Chandigarh Tricity — sees patients with this condition regularly. Most cases are treated without surgery first.
1. Giving way during sport, twisting, or pivoting. Classic ACL tear. Often a "pop" at the moment of injury, immediate swelling within 4–6 hours, instability with cutting movements. MRI confirms. Most ACL tears in active patients require reconstruction.
2. Giving way with locking or catching. Suggests a meniscal tear — particularly a bucket-handle tear where the torn fragment displaces into the joint and physically blocks movement. May be associated with clicking and an inability to fully straighten the knee.
3. Giving way going downstairs or pivoting on a planted foot. Often patellar instability — the kneecap partially dislocating. Common in adolescent girls and young women with anatomical predisposition.
See a specialist within 48 hours. Acute haemarthrosis (blood in the joint) within 4 hours of injury has a 70–75% chance of being an ACL tear. Early diagnosis preserves your treatment options — including non-surgical for selected partial tears.
Arrange MRI within 2–4 weeks. Recurrent buckling damages cartilage with each episode. Even a delayed-presentation ACL tear can be successfully reconstructed — but every additional twisting episode adds meniscal and chondral damage.
Clinical examination first. Lachman's test (ACL), pivot-shift test (rotational instability), McMurray's test (meniscus), apprehension test (patellar instability). A skilled examiner can diagnose 90% of ACL tears clinically.
X-ray. Rules out fracture — especially a Segond fracture (small bone avulsion at the lateral tibia) which is essentially pathognomonic of ACL injury.
MRI. Gold standard for ligament and meniscal injuries. Should be requested by an orthopaedic specialist, not generically.
Some patients do well without surgery. Non-active patients (sedentary lifestyle, low-demand sport) with isolated ACL tears can sometimes manage with rehabilitation and lifestyle modification. Selected partial tears heal.
Most active patients benefit from reconstruction. ACL reconstruction is now arthroscopic, day-care or 1-night admission, with hamstring or quadriceps tendon graft. Return to running 4 months, full sport at 9–12 months.
Meniscal tears: repair when possible, trim when not. Modern practice favours preserving the meniscus through repair, especially in younger patients. Partial meniscectomy for irreparable tears.
Patellar instability. First dislocation often managed conservatively. Recurrent instability may need MPFL (medial patellofemoral ligament) reconstruction.
Each episode of giving way damages the joint:
The knee that gives way once will give way again. The earlier the diagnosis, the more options you have.
Book a consultation to discuss your symptoms, treatment options, and what surgery (if any) you actually need.