Step-by-Step Guide to Knee Replacement Surgery

The Knee Replacement Journey

• 💡 Patients often ask about the details of knee replacement surgery, while others prefer not to know.
• 🎯 This guide breaks down the process from preparation to closure, explaining what happens during the procedure.

Surgical Preparation and Approach

• 🧼 The surgical area is prepped with antiseptic to kill bacteria and prevent infection.
• 🪞 Sterile drapes are used to isolate the surgical site, focusing only on the knee.
• 🔪 A common surgical approach involves an anterior midline incision, sometimes incorporating old scars for access.
• 🦴 The goal of the approach is to expose the knee joint, involving cutting through skin and fat to reach the kneecap and tendons.
• ✂️ An arthrotomy, typically a median parapatellar incision, is performed to access the joint, allowing the kneecap to be flipped aside.

Bone Preparation and Implantation

• 제거 The ACL and PCL (sometimes) are removed, along with the medial and lateral menisci.
• 📐 Bone cuts are made on the femur and tibia using guides or computer navigation to precisely match the implant surfaces and correct leg alignment.
• ⚙️ Trial components are used to test different sizes and ensure proper knee movement (straightening and bending) and stability, similar to trying on shoes.
• ⚖️ The thickness of the plastic insert between the metal components is adjusted to achieve the optimal fit – not too tight, not too loose.

Final Implantation and Closure

• ✅ Once the correct sizes are determined, the actual femoral and tibial implants are fixed to the bone, either cemented or un-cemented.
• 🧵 Closure involves sewing the arthrotomy shut, reattaching the quadriceps tendon, and then closing the subcutaneous tissues and skin.
• 🩹 Various methods like sutures, staples, or glue can be used for skin closure.

Understanding Variations and Key Takeaways

• 🔩 While many companies make knee replacements, the fundamental design of a metal femur, metal tibia, and plastic liner has remained consistent.
• 📚 Educating oneself about the procedure can be beneficial for patients undergoing knee replacement surgery.
• 💬 Viewers are encouraged to share their experiences and questions in the comments.