An arthroscopy is a procedure used to diagnose and treat some joint problems.

When you have an arthroscopy, an instrument called an arthroscope is used to look inside your joint. An arthroscope is a small, fibre-optic video camera attached to a narrow tube.

Introduction

Wrist arthroscopy has steadily gained prominence as a diagnostic and therapeutic procedure for several wrist and carpal pathologies. Advances in wrist arthroscopy have widened its indications since it was first described in the late 1970s.

Anatomy and Physiology

The anatomy involved with wrist arthroscopy consists of the radiocarpal joint and the ulnocarpal joint. The carpus of the hand is made of 8 bones arranged in 2 rows, proximal and distal. The proximal row is the most involved in wrist arthroscopy and is made of the scaphoid, lunate, triquetrum, and pisiform, in a radial to ulnar direction, respectively. The ulnocarpal joint consists predominantly of the triangular fibrocartilage complex (TFCC). This TFCC consists of ligamentous and fibrocartilaginous structures that aid in the stabilization of the wrist joint.

The standard dorsal radiocarpal portals used in wrist arthroscopy are named and placed in relationship to the dorsal extensor compartments. There are 6 dorsal extensor compartments of the wrist. The first compartment is the most radial and contains the extensor pollicis brevis (EPB) tendon and abductor pollicis longus (APL) tendon. The second dorsal compartment contains the extensor carpi radialis brevis (ECRB) tendon and extensor carpi radialis longus (ECRL) tendon. The third compartment courses around Lister’s tubercle on its ulnar side and contains the extensor pollicis longus (EPL) tendon. The fourth extensor compartment contains multiple slips of the extensor digitorum communis (EDC) tendons and the extensor indicis proprius (EIP) tendon. The fifth extensor compartment contains the extensor digiti minimi (EDM) tendon. Finally, the sixth extensor compartment is the most ulnar compartment, containing the extensor carpi ulnaris (ECU) tendon.

Indications

Wrist arthroscopy may be implemented for multiple pathologies of the wrist, including diagnostic evaluation of the joint surfaces and ligaments, loose body removal, TFCC pathology, carpal instability, direct visualization of the distal radius, or scaphoid intraarticular fracture reduction, capsulectomy, ganglion excision, and radial styloidectomy. With advances in wrist arthroscopy, indications continue to grow.

Contraindications

Absolute contraindications include active wrist infection for an elective procedure using intraarticular implants such as suture anchors or suture materials and capsular tears that could lead to excessive fluid extravasation. Relative contraindications include bleeding disorders.

Equipment

For wrist arthroscopy, smaller arthroscopic equipment is needed. A 30° arthroscope measuring 2.7 mm or less should be used for visualization. A 70° arthroscope may also be used. Wrist joint distraction is performed using a commercial traction device which is commonly available. It is recommended to use small joint graspers and shavers measuring 3.5 mm or less. An arthroscopic video monitor, effective light source, and recording equipment are necessary.

Personnel

Wrist arthroscopy is to be performed in the operating room suite. As such, it is recommended that general operating room staff should be present, including but not limited to: A single surgeon trained in the procedure, a surgical technician, surgical assistant, circulating nurse, and anesthetist.

Preparation

A complete physical exam of the upper extremity is a necessity for appropriate patient selection. Preoperative planning should take place, including preoperative wrist and hand radiographs. Advanced imaging in the form of magnetic resonance imaging (MRI) of the wrist and/or hand may be useful for diagnosing soft tissue injuries treated using wrist arthroscopy.

Appropriate patient selection and screening are necessary. Patients should undergo standardized preoperative testing to ensure it is safe for them to undergo this surgical procedure and be optimized preoperatively.

Technique or Treatment

Prior to transport to the operative suite, the anesthesia team may elect to perform a regional nerve block for perioperative pain control. General anesthesia is recommended for this type of procedure but can be performed under monitored anesthesia care (MAC).

Once the patient is transported to the operating room, they should be positioned supine with operative extremity on an arm table. A tourniquet can be used for hemostasis, and it should be placed as proximally as possible on the operative extremity. The entire upper extremity is prepped and draped in a routine sterile fashion. The traction device with sterilized components can be attached to the operative extremity using finger traps. It is recommended that no more than 10 lbs. of traction used during the procedure.

To gain access to the wrist joint using dorsal portals, the surgeon should be facing the dorsum of the hand and seated at the patient’s head. For volar portals, the converse is true, and the surgeon should be seated in the axilla facing the volar wrist. The dorsal 3-4 portal is the standard viewing portal and is established first. This portal is between extensor compartments 3 and 4 and is found by palpating the concavity just distal to Lister’s tubercle. A 22-gauge needle is then inserted into this space between EPL and EPC. Using the needle ensures that it is in an intraarticular position. Distend the joint with 5 to 10 ml of normal saline. The needle is then pulled, and a skin incision is made using an 11 blade scalpel. Blunt dissection is achieved using a hemostat to avoid iatrogenic injury to sensory nerves and/or extensor tendons. An arthroscopic cannula with trocar is then bluntly punctured through the joint capsule at a 10-degree dorsal-distal to proximal-palmar angle, which accounts for the volar tilt of the distal radius. The blunt trocar is removed, and a 30° 2.7 mm arthroscope is then inserted into the cannula. These steps are repeated to establish the remaining portals.

Following the 3-4 portal, the surgeon may choose to establish an inflow/outflow fluid portal, which is most commonly the 6-U portal. The 6-U denotes placement on the ulnar side of the 6th extensor compartment containing the ECU. This can be done under direct intra-articular visualization with the arthroscope in the 3-4 portal and using an 18 gauge needle inserted just ulnar to the ECU at the level of the joint line.

The 4-5 portal is the next to be established and is generally used as the working portal, located between the 4th and 5th extensor compartment (EDC and EDM). This portal is made by palpating the EDC and rolling your finger to the ulnar border of the compartment. A 22 gauge needle is inserted into the joint under direct visualization in the same manner as the 3-4 portal. The 4-5 portal is approximately 1 cm more proximal than the 3-4 portal due to the decrease in radial height on the ulnar side of the wrist. This portal serves mainly as the working portal and allows visualization of the TFCC.

Establishing the 6-R portal is achieved by palpating the radial edge of the ECU tendon and inserting a 22 gauge needle intra-articularly. Care should be taken when making this portal as not to injure the dorsal sensory branch of the ulnar nerve, which is close to the 6-R and 6-U portals.

The 1-2 portal can be made by palpating the dorsum of the anatomic snuffbox and radial to the EPL tendon. It is recommended to place this portal no more than 4.5 mm dorsal to the APL and EPB to reduce the risk of injury to the superficial radial nerve and the radial artery.

The volar radial-sided portal can be made using an inside-out technique by placing a blunt trocar or switching stick through the 3-4 portal. The trocar is then gently passed through space between the volar radioscaphocapitate and long radiolunate ligaments until tenting of the skin occurs. A skin incision is made over the tip of the trocar. This portal can be safely made without damaging the nearby radial artery and the superficial sensory branch of the radial nerve.

The volar ulnar portal is located ulnar to the flexor tendons of the digits . A 2 cm longitudinal incision is made at the level of the proximal wrist crease. Flexor tendons are retracted radially, and the flexor carpi ulnaris (FCU) and neurovascular bundle are retracted ulnarly. The radiocarpal joint is identified, and a 22 gauge needle is inserted through the capsule, ensuring appropriate placement.

Once relevant portals are established, the surgeon can perform various procedures, including extensive debridement, ligament repair, and osseous procedures.

Complications

Wrist arthroscopy rarely results in complications. Thorough knowledge of wrist anatomy is necessary during the portal placement so as not to cause iatrogenic injury to local neurovascular and tendinous structures. Ahsan and colleagues performed a meta-analysis to quantify the overall complication rate of wrist arthroscopy and found it to be 4.8%.] Some of the complications were those related to traction and arm position and injury to cutaneous nerves, vascular structures, flexor and extensor tendons, ligaments, and articular cartilage.

Clinical Significance

Wrist arthroscopy is a powerful tool in a surgeon’s armamentarium to provide a wide array of surgical procedures that are minimally invasive with a low complication rate.

Enhancing Healthcare Team Outcomes

Wrist arthroscopy initially started as a diagnostic tool for intraarticular wrist pathology. With advances in equipment and technology, wrist arthroscopy can now provide significant therapeutic benefits. Management of peripheral avulsions of the TFCC can be successfully managed with arthroscopic repair with 74 to 93% satisfactory results.] [Level 4] With the increase in novel repair techniques and technologies, the future of wrist arthroscopy’s therapeutic value appears promising.

While the orthopedic wrist specialist is center stage for wrist arthroscopy procedures, it requires an interprofessional team to manage the case from end to end. The patient's family clinician can assist with general monitoring following the procedure. Orthopedic and OR nurses will assist during the procedure and provide post-surgical instructions. A physical therapist will direct rehabilitative exercise and report progress back to the managing clinician of their nurse. This approach will bring about the best possible results with the fewest adverse events.

An arthroscopy can be done to help diagnose a problem in a joint. It can also help guide surgical repair of a joint problem.

This type of ‘keyhole surgery’ is done with narrow, pencil-shaped surgical instruments.

Arthroscopy can be done on many parts of your body:

• knee arthroscopy
• shoulder arthroscopy
• elbow arthroscopy
• ankle arthroscopy
• hip arthroscopy
• wrist arthroscopy

In the knee, arthroscopy may be used for conditions such as:

• some meniscal (cartilage) tears
• some ligament injuries
• loose bodies of bone and cartilage inside the joint

Before an arthroscopy, your doctor will ask about your symptoms and examine your joint. They may also ask for:

• x-rays
• MRI scans
• other scans
• blood tests

Talk with your doctor about the benefits and risks of arthroscopy for your condition.

Before agreeing to arthroscopic surgery, ask if there are other suitable treatment options, such as:

• losing weight
• pain relief medicines
• exercise
• physiotherapy

An arthroscopy is often done as day surgery. Depending on the joint involved and your health, you may have a:

• local anaesthetic
• spinal anaesthetic
• general anaesthetic

Your surgeon will make a tiny cut near your joint and insert the arthroscope. The images from inside your joint will be shown on a video monitor. The surgeon might be able to see what is causing your problem.

If surgery is needed, your surgeon may make a few more narrow cuts and insert surgical instruments.

Examples of arthroscopic surgery include:

• reconstructing a torn ligament in the knee
• treating carpal tunnel syndrome in the wrist
• fixing a recurring shoulder dislocation

After surgery, your wounds will be stitched or closed with special tape and then bandaged.

Injuries to the knee are common. Since this joint is primarily supported by muscles and ligaments, injuries to any of these structures will result in pain or knee instability. Injury to the posterior cruciate ligament occurs when the knee is flexed and the tibia is driven posteriorly, such as falling and landing on the tibial tuberosity or hitting the tibia on the dashboard when not wearing a seatbelt during an automobile accident. More commonly, injuries occur when forces are applied to the extended knee, particularly when the foot is planted and unable to move. Anterior cruciate ligament injuries can result with a forceful blow to the anterior knee, producing hyperextension, or when a runner makes a quick change of direction that produces both twisting and hyperextension of the knee.

A worse combination of injuries can occur with a hit to the lateral side of the extended knee (Figure 9.20). A moderate blow to the lateral knee will cause the medial side of the joint to open, resulting in stretching or damage to the tibial collateral ligament. Because the medial meniscus is attached to the tibial collateral ligament, a stronger blow can tear the ligament and also damage the medial meniscus. This is one reason that the medial meniscus is 20 times more likely to be injured than the lateral meniscus. A powerful blow to the lateral knee produces a “terrible triad” injury, in which there is a sequential injury to the tibial collateral ligament, medial meniscus, and anterior cruciate ligament.

Arthroscopic surgery has greatly improved the surgical treatment of knee injuries and reduced subsequent recovery times. This procedure involves a small incision and the insertion into the joint of an arthroscope, a pencil-thin instrument that allows for visualization of the joint interior. Small surgical instruments are also inserted via additional incisions. These tools allow a surgeon to remove or repair a torn meniscus or to reconstruct a ruptured cruciate ligament. The current method for anterior cruciate ligament replacement involves using a portion of the patellar ligament. Holes are drilled into the cruciate ligament attachment points on the tibia and femur, and the patellar ligament graft, with small areas of attached bone still intact at each end, is inserted into these holes. The bone-to-bone sites at each end of the graft heal rapidly and strongly, thus enabling a rapid recovery.

Recovery from arthroscopic surgery is usually faster than open surgery.

You may have some pain, swelling, bruising and stiffness after the surgery. You can take pain-relief medicines to help ease pain and discomfort.

You might also be advised to:

• keep the affected joint raised
• apply ice packs to reduce swelling
• wear a pressure stocking
• use a splint, supportive brace or crutches
• do special exercises or physiotherapy to strengthen your muscles and prevent joint stiffness

You might need to have a few days or a week off before returning to work or school. Your doctor will talk with you about managing your wound dressings.

Recovery will depend on your condition and the procedure performed. Ask your doctor about what to expect in your situation.

Any type of surgery has some risks. While most arthroscopies go smoothly, possible complications can include:

• infection
• a deep vein thrombosis (blood clot), usually in the leg
• bleeding inside your joint
• nerve damage or numbness
• ongoing pain

Contact your doctor immediately if you have:

• high fever
• severe pain
• redness or excess swelling around the wounds
• numbness
• bad smelling fluid leaking from the incisions