Patient question

What are the risks of revision ACL surgery compared with the first operation?

Dr. Pablo GelberOrthopaedic Knee Surgeon

Quick answer

Revision ACL surgery shares the general risks of any knee operation, such as infection, blood clots and stiffness, but results are usually less predictable than after a first reconstruction, with a higher chance of the graft failing again and of later arthritis. Careful planning reduces these risks, explains Dr. Pablo Gelber at Aman Hospital in Doha.

General surgical risks

Infection, which is uncommon and lowered by antibiotics and sterile technique
Blood clots in the leg, especially with reduced mobility or long flights soon after surgery
Stiffness or difficulty regaining full straightening
Numbness around the scars
Anaesthetic risks, which the anaesthetist discusses beforehand

Risks specific to revision

Graft failure again: the risk is generally higher than after a first operation, particularly in young athletes returning to pivoting sport
Bone problems: widened or misplaced tunnels may need bone grafting and a second stage
Arthritis: many revision knees already have meniscus or cartilage damage, which raises the risk of wear over time
A longer, more cautious recovery, which can affect work and sport plans
Residual looseness, even when the graft is intact, if other ligaments are also lax

What lowers the risk

Finding and correcting the reason the first graft failed is central: tunnel position, a steep tibial slope, a missed posterolateral corner or other ligament injury, or meniscus loss. Adding a lateral extra-articular procedure is considered in some patients. On the patient side, a thorough rehabilitation and a criteria-based return to sport matter as much as the surgery.

Warning signs after surgery

Seek urgent advice for fever, increasing redness or discharge from the wounds, calf pain or swelling, chest pain or breathlessness, or a sudden severe increase in knee swelling. Dr. Gelber discusses your individual risk profile in detail at Aman Hospital in Doha before any decision is made.

Frequently asked questions

Should I avoid revision because the risks are higher?

Not necessarily. A knee that keeps giving way also carries risks, mainly to the meniscus and cartilage. The decision weighs both.

Can I return to the same level of sport?

Many people return to sport, but return to the same level is less consistent than after a first reconstruction. Your goals are part of the discussion.