Introduction

Facing an anterior cruciate ligament (ACL) repair can be overwhelming, bringing with it many questions and concerns about what to expect. The ACL is a vital ligament in the knee that helps keep it stable and allows for smooth movement in everyday activities and sports. Having a clear understanding of the entire process—from preparing for surgery to recovery and rehabilitation—can help ease worries and boost confidence. ACL repair is a well-established procedure carried out by skilled specialists like Professor Paul Lee and the team at MSK Doctors, who are committed to providing expert, compassionate care. Recent research emphasises that the ACL "is one of the most injured ligaments in the knee," often damaged during activities without any physical contact, such as sudden changes in direction or poor landings.

Preparing for Surgery

Before surgery, patients go through a thorough diagnostic process which usually includes physical examinations and scans like MRI, to confirm the ACL injury and determine the best course of action. Early discussions with your orthopaedic team allow for personalised treatment plans to be developed.

Preparation is essential for a smoother recovery. Patients are advised to engage in ‘prehabilitation’ exercises that gently strengthen muscles around the knee. It’s also important to organise time off work or school and arrange for some support at home after surgery. Having detailed conversations with experienced surgeons like Professor Paul Lee helps set realistic expectations and provides reassurance about what happens during ACL surgery and the expected recovery timeline.

What Happens During ACL Surgery

On the day of surgery, you’ll be admitted to hospital and prepared for anaesthesia—usually general anaesthetic, but sometimes spinal depending on your situation—to keep you comfortable throughout the procedure. The surgery is performed using keyhole (arthroscopic) techniques, which involve small incisions through which the surgeon can repair or reconstruct the damaged ligament with tissue grafts.

Although ACL reconstruction has been the standard treatment for many years, there is renewed interest in repairing the original ligament in suitable cases. One study describes how “repair of the ligament has potential advantages over reconstruction, such as decreased surgical trauma, faster return of motion, and less invasive surgery.” Another benefit is that “all grafts remain available for any reconstruction if the repair doesn’t succeed,” leaving options open for future treatment. The surgery usually lasts between one and two hours, during which you’ll be under anaesthetic and pain-free. The surgical team, led by experts like Professor Paul Lee, carefully manages the procedure and any associated risks, ensuring a safe and effective operation.

Care and Pain Management Immediately After Surgery

It’s perfectly normal to experience some pain and swelling around your knee soon after surgery. This pain is managed effectively with medication, alongside helpful measures such as applying ice and elevating the leg to reduce swelling. You may need to use crutches and wear a knee brace at first to protect the repair and limit movement.

Most patients can expect to stay in hospital for one or two days, depending on how well pain is controlled and how quickly they regain basic mobility. The MSK Doctors team provides dedicated support during this early stage, guiding you with advice tailored to soothe discomfort and encourage gentle movement, which is important to kick-start the healing process.

The Road to Recovery: Physical Therapy and Returning to Activity

The rehabilitation journey after ACL repair follows a carefully planned timeline. It starts with gentle exercises to restore movement without straining the knee, gradually progressing to strengthening muscles and regaining full function.

As recovery advances, patients can slowly resume daily activities and driving, guided by their physiotherapist and healthcare team on when increased movement and weight-bearing are safe. Returning to sports is a longer-term goal, often taking between six and twelve months of careful rehabilitation. It’s important to remember that although “reconstruction remains the gold standard for ACL injuries, many patients face challenges like graft failure, difficulty returning to their sport, or even arthritis.” Encouragingly, new tissue engineering techniques are showing promise, with studies reporting that “biomaterials used in repair have demonstrated promising outcomes,” hinting at improved healing in the future. Recovery can bring challenges such as stiffness, swelling, or fear of re-injury, but following the rehabilitation plan closely and maintaining patience can lead to a successful outcome.

When to Get Help and Setting Realistic Expectations

Keeping a close eye on your recovery is crucial. If you notice persistent or worsening pain, swelling, or instability in the knee, seek advice from your healthcare team promptly. Regular check-ins with specialists at MSK Doctors ensure your progress is on track and any issues are addressed early. Open, honest communication about how you’re feeling helps guide safe and steady rehabilitation.

Conclusion

Understanding each step of the ACL repair journey—from preparation and surgery to recovery and physiotherapy—helps you approach this important process with confidence and clarity. The expert care from Professor Paul Lee and the MSK Doctors team means you’ll have trusted guidance every step of the way. Remember, for personalised medical advice suited to your individual needs, always consult a qualified healthcare professional.

References

Hasan, J. (2023). Primary ACL Repair. Orthopaedic Journal of Sports Medicine, 11(2_suppl). https://doi.org/10.1177/2325967121s00863
Fradin, T., Haidar, I., Rayes, J., Ngbilo, C., Dutra Vieira, T., & Sonnery‐Cottet, B. (2021). Arthroscopic ACL reconstruction after failed ACL repair. Arthroscopy Techniques, 10(4), e1001-e1005. https://doi.org/10.1016/j.eats.2020.11.022
Vavken, P., & Murray, M. M. (2011). The potential for primary repair of the ACL. Sports Medicine and Arthroscopy Review, 19(1), 44-49. https://doi.org/10.1097/jsa.0b013e3182095e5d