A Guide to Knee Arthroscopy: Preparation, Procedure, and Recovery

Understanding and Treating Your Knee Pain

Your knees support you through every step of your life, so when pain, swelling, or instability begins to limit your daily activities, it's time to seek answers. If your symptoms persist, your orthopaedic surgeon may recommend knee arthroscopy—a minimally invasive procedure that allows surgeons to examine the inside of your knee joint to diagnose and treat problems without a large incision.

Because arthroscopy uses small incisions, patients often experience less pain and a faster recovery compared to traditional open surgery. This guide will walk you through what to expect, from your initial diagnosis to your successful recovery at home.

Diagnosing the Problem

Before recommending surgery, your care team will pinpoint the source of your discomfort. This process typically involves a physical examination and advanced imaging studies.

• X-rays provide clear images of the bones, revealing fractures or arthritis.
• An MRI (Magnetic Resonance Imaging) scan creates detailed pictures of soft tissues like cartilage, ligaments, and tendons.

These tests help your surgeon understand the structures involved, which often include the meniscus, articular cartilage, or stabilizing ligaments like the ACL.

A Quick Tour Inside Your Knee

Your knee is a complex joint where the thigh bone (femur) meets the shin bone (tibia). Key structures include:

• Articular Cartilage: This smooth, slippery tissue covers the ends of your bones, allowing them to glide effortlessly against each other.
• Meniscus: Two C-shaped pads of cartilage sit between the femur and tibia, acting as shock absorbers and stabilizers.
• Ligaments: Strong bands of tissue, including the anterior cruciate ligament (ACL), connect the bones and prevent excessive movement.
• Patella: The kneecap, which sits in a groove at the front of the femur.

Common Problems Treated with Arthroscopy

Arthroscopy can address a variety of knee conditions, including:

• Meniscus Tears: A sudden twist or repetitive squatting can tear the meniscus, causing pain, swelling, and a catching or locking sensation. The surgeon may trim the damaged portion (meniscectomy) or, if the tear is in an area with good blood supply, repair it with sutures.
• ACL Tears: The anterior cruciate ligament is often injured during sports that involve sudden stops or changes in direction. A torn ACL can be reconstructed using a graft—a piece of healthy tissue taken from your own body or a donor—to restore stability.
• Cartilage Damage and Loose Bodies: Worn or damaged articular cartilage can cause pain and grinding. Your surgeon can smooth the damaged surfaces or remove loose fragments of bone or cartilage that may be floating in the joint.
• Patella (Kneecap) Issues: If the patella is misaligned due to tight tissues, it can cause pain and wear on the underlying cartilage. A surgeon may perform a "lateral release" to cut the tight tissues and allow the kneecap to track properly.

Is Arthroscopy Right for You?

Deciding on surgery is a collaborative process between you and your surgeon. Non-surgical options like physical therapy, medications, or bracing may be tried first. If these treatments don't provide relief, or if imaging shows a clear mechanical problem, arthroscopy may be the best path forward. Come to your appointment with a list of questions to ensure you feel confident and informed about the plan.

Risks and Possible Complications

Knee arthroscopy is a very safe procedure, but like any surgery, it carries some risks. Your surgeon will discuss these with you in detail. Potential complications include:

• Infection
• Blood clots
• Bleeding or swelling
• Stiffness in the knee
• Injury to nearby nerves or blood vessels
• The need for additional surgery in the future

Preparing for Your Procedure

Proper preparation is key to a smooth procedure and recovery. Your care team will provide specific pre-operative instructions. Be sure to:

• Discuss all medications: Tell your surgeon about everything you take, including prescriptions, over-the-counter drugs, vitamins, and herbal supplements. You may need to stop taking certain medications, like blood thinners, before surgery.
• Follow fasting instructions: You will be told to stop eating and drinking for a specific period before your procedure. It is critical to follow these directions exactly to prevent complications with anesthesia.
• Arrange for help at home: Plan for a responsible adult to drive you home and stay with you for at least the first 24 hours. Set up a comfortable recovery space with pillows, blankets, and ice packs within easy reach.

The Day of Surgery

On the day of your procedure, the surgical team will confirm your name, the procedure, and the correct knee multiple times for your safety. You will receive anesthesia to ensure you are comfortable and pain-free.

During the surgery, the surgeon will make two or three small incisions, or "portals," around your knee. A thin, lighted instrument called an arthroscope is inserted through one portal, sending a live video feed to a monitor. This allows the surgeon to see inside your joint with incredible detail. Specialized surgical tools are inserted through the other portals to repair, remove, or smooth damaged tissue. Once finished, the incisions are closed with stitches or surgical tape and covered with a bandage.

Your Recovery at Home

After a brief period in the recovery room, you will be cleared to go home with a set of post-operative instructions. Follow them closely to ensure the best possible outcome.

Immediate Post-Op Care

• Elevate your leg: Keep your operated knee propped up on pillows so it is above the level of your heart. This dramatically helps reduce swelling.
• Ice consistently: Apply an ice pack wrapped in a thin towel to your knee for 15-20 minutes several times a day, especially during the first 48 hours.
• Manage your pain: Take your prescribed pain medication as directed to stay ahead of discomfort.
• Follow weight-bearing instructions: Your surgeon will tell you how much weight you can put on your leg. You may need to use crutches for a period of time to protect the joint as it heals.

Early Exercises for Healing

Gentle movement is crucial for preventing stiffness and blood clots. Your surgeon or physical therapist will provide a specific exercise plan. Start with these simple movements several times a day unless instructed otherwise.

Ankle Pumps

While resting, frequently point your toes away from you, then pull them back toward you. You can also make slow circles with your feet. This simple exercise promotes blood flow and reduces the risk of blood clots.

Quadriceps Sets

Lie on your back with your leg straight. Tighten the large muscle on the front of your thigh (quadriceps) and press the back of your knee down into the bed. Hold for 5-10 seconds, then relax.

Straight Leg Raises

Lie on your back with your unoperated leg bent. Keeping your operated leg perfectly straight, tighten your thigh muscle and slowly lift your leg 8 to 12 inches off the surface. Hold for 5 seconds, then slowly lower it.

When to Call Your Doctor

Contact your surgeon's office immediately if you experience any of the following warning signs:

• Fever of 100.4° F (38° C) or higher
• Pain that is not controlled by your prescribed medication
• Excessive swelling that does not improve with elevation and ice
• Increased redness, warmth, or drainage from the incisions
• Bleeding that soaks through your bandages
• Severe nausea or vomiting
• New or worsening numbness or tingling in your leg or foot