Knee arthroscopy is one of the safest and most effective minimally invasive procedures in orthopedic surgery. Understanding the step-by-step surgical process alleviates patient anxiety, facilitates expectations, and enhances compliance during the post-operative rehabilitation phase.
Indications for Knee Arthroscopy
Surgical intervention is indicated in six primary clinical scenarios:
- Symptomatic meniscus tears with mechanical locking or catching.
- Complete Anterior Cruciate Ligament (ACL) or Posterior Cruciate Ligament (PCL) tears.
- Symptomatic loose bodies within the joint space.
- Early focal articular cartilage defects.
- Chronic refractory synovitis.
- Diagnostic evaluation of intra-articular pathology unresolved by MRI.
Clinical Note: Delaying necessary surgery can lead to progressive articular cartilage degeneration. Mechanical locking or joint instability warrants prompt subspecialist consultation.
Step-by-Step Surgical Procedure
Knee arthroscopy follows five sequential stages:
[1. Pre-Op Prep & Anesthesia] ➔ [2. Patient Positioning] ➔ [3. Portal Creation & Scope Insertion] ➔ [4. Intra-Articular Repair] ➔ [5. Closure & Recovery]
1. Preoperative Preparation & Anesthesia
- Anticoagulants and aspirin are discontinued 5–7 days prior. Fasting begins at midnight before surgery.
- Baseline lab work, ECG, and blood pressure/glycemic control are evaluated. Diabetic patients must achieve HbA1c < 8.0% to minimize infection risk.
- Performed under general anesthesia, spinal block, or regional nerve blockade.
2. Patient Positioning & Preparation
- The patient is positioned supine with the knee supported at 90° of flexion.
- The skin is disinfected using povidone-iodine or chlorhexidine and draped sterilely.
- A thigh tourniquet is temporarily inflated to minimize bleeding and optimize joint visualization.
3. Portal Creation & Joint Distension
- Two small incisions (portals) measuring 5–10 mm are made on either side of the patellar tendon. Additional portals may be created for complex procedures like ACL reconstruction.
- Sterile saline solution is continuously infused to distend the joint capsule, enhance visibility, and flush out debris.
4. Intra-Articular Diagnostics & Intervention
- The surgeon introduces a high-definition arthroscopic camera to perform a systematic evaluation of all compartments:
- Meniscectomy vs. Repair: Trimming avascular tears or suturing vascular Red Zone tears using all-inside devices.
- ACL Reconstruction: Drilling femoral and tibial tunnels and securing an autograft (patellar or hamstring tendon) with interference screws or cortical buttons.
5. Closure & Immediate Recovery
- Saline fluid is evacuated, and portal incisions are closed with single sutures or sterile adhesive strips.
- A compressive dressing is applied, and the leg is elevated.
- The patient is monitored in the PACU for 60 to 120 minutes prior to discharge.
Operative Duration & Costs (Cairo, 2026)
Operative duration ranges between 30 and 90 minutes depending on procedure complexity. Total procedural costs vary based on surgical complexity and implants.
| Procedure Type | Operative Duration | Price Range (EGP, 2026) | Typical Recovery Timeline |
| Lavage & Loose-Body Removal | 30 – 45 min | EGP 15,000 – EGP 25,000 | 2 – 4 weeks |
| Partial Meniscectomy | 30 – 60 min | EGP 20,000 – EGP 35,000 | 4 – 8 weeks |
| Meniscal Repair | 45 – 75 min | EGP 35,000 – EGP 55,000 | 4 – 6 months |
| ACL Reconstruction | 60 – 90 min | EGP 40,000 – EGP 70,000 | 6 – 9 months |
Post-Operative Rest & Mobilization
Modern evidence-based protocols emphasize early controlled mobilization over prolonged bed rest.
- Partial Meniscectomy: Protected weight-bearing with crutches begins within 24 to 48 hours.
- ACL Reconstruction / Meniscal Repair: Protected weight-bearing with a hinged knee brace begins within 2 to 3 days.
Clinical Warning: Extended immobilization induces rapid quadriceps inhibition and muscle atrophy, significantly delaying overall recovery. Controlled early motion is a fundamental cornerstone of post-operative rehabilitation.
frequently asked questions
FAQ: Steps of Knee Arthroscopy Surgery Frequently Asked Questions: Steps of Knee Arthroscopy Surgery
What preparation and positioning occur in the OR prior to making incisions?
After anesthesia is administered, the patient’s leg is secured in a specialized leg holder or lateral post, allowing the surgeon to maneuver the joint freely. The operative leg is scrubbed with antiseptic solution, draped in sterile barriers, and a thigh tourniquet is often applied to maintain a clear, bloodless surgical field.How are arthroscopic portals (incisions) established?
The surgeon marks key anatomical landmarks and makes 2 to 3 small keyhole incisions (portals) around the patellar tendon, each about 0.5 to 1 cm long. The primary anterolateral portal is used for the camera, while the anteromedial portal serves as the main working pathway for instruments.Why is sterile fluid continually pumped into the knee joint during surgery?
Sterile saline solution is continuously distended through the joint to expand the space between the bones, push away soft tissue, and wash out debris or blood. This provides a clear, magnified field of view through the high-definition camera.What happens during the diagnostic sweep phase of knee arthroscopy?
The surgeon performs a systematic inspection of all joint compartments. Using the camera and a micro-probe, they systematically evaluate the suprapatellar pouch, patellofemoral joint, medial and lateral menisci, cruciate ligaments (ACL/PCL), and articular cartilage for pathology.How is a torn meniscus treated during the therapeutic surgical step?
Depending on tear vascularity and pattern, the surgeon uses specialized micro-shavers, biters, or suture anchors. Non-repairable tears in the inner zone undergo partial meniscectomy (trimming unstable edges), while repairable tears in the vascular zone are sutured back together.How is an ACL reconstruction step integrated into knee arthroscopy?
If rebuilding the ACL, the surgeon prepares a tendon graft (autograft or allograft), uses specialized drills under arthroscopic guidance to create bone tunnels in the tibia and femur, and secures the new graft in place using bioabsorbable screws or cortical buttons.How are the keyhole portal incisions closed at the end of the procedure?
Once fluid is drained and joint inspection is complete, the arthroscope is removed. Portals are closed using one or two small sutures or sterile adhesive strips (Steri-Strips), followed by the application of sterile dressings and an elastic compression bandage.How long does a standard knee arthroscopy procedure take?
A basic diagnostic sweep or partial meniscectomy typically takes 30 to 45 minutes. More complex therapeutic procedures, such as meniscus repairs or multi-ligament reconstructions, can take between 60 to 90+ minutes.What happens immediately in the PACU (Recovery Room) after surgery?
The patient is moved to recovery, where vital signs are monitored. The knee is elevated and dressed with cold therapy (ice packs) to minimize swelling. Oral or IV pain management is administered, and the patient is evaluated once regional/general anesthesia wears off.When does post-operative weight-bearing and mobility begin?
Most simple arthroscopy patients can bear weight as tolerated with crutches and go home the same day. Patients undergoing meniscus repairs or ligament reconstructions may be fitted with a hinged knee brace and follow restricted weight-bearing protocols for a few weeks.
Medical References
- Medscape — Knee Arthroscopy: Surgical Technique Overview.
- AAOS OrthoInfo — Knee Arthroscopy: Procedure Steps and Recovery.
- Hospital for Special Surgery (HSS) — Knee Arthroscopy: Surgical Technique and Rehabilitation.
- Cleveland Clinic — Knee Arthroscopy: What to Expect Before and After.
- Cleveland Clinic — ACL Reconstruction: Surgery Steps and Recovery.