Subluxation of the Patella: Symptoms and Management

Subluxation of the patella can be a painful and debilitating condition. It occurs when the patella (kneecap) partially dislocates from its normal position, causing discomfort and instability in the knee.

Common symptoms of patellar subluxation include a feeling of the kneecap slipping out of place, pain when climbing stairs or squatting, and a general feeling of instability in the knee.

Pain is often described as a sharp, stabbing sensation in the front of the knee, which can be exacerbated by activities that involve bending or twisting.

A sudden twisting or bending motion, such as when changing direction quickly while running, can trigger a patellar subluxation episode.

Patella subluxation is a condition where the kneecap temporarily slides out of its normal place in the groove at the center of the bottom end of the thigh bone. This can happen due to various reasons, and it's essential to understand the symptoms and diagnosis process.

The kneecap normally sits in a groove at the center of the bottom end of the thigh bone, but in the case of a patellar subluxation, it briefly slides out of its normal place. In most cases, the kneecap moves towards the outside of the body when it slides out of place.

You may experience a range of symptoms, including visible deformity, severe knee pain, swelling, and a popping sound or sensation. Other symptoms may include buckling or catching of your knee, locking of your knee, instability of your knee, and inability to squat or walk up and down stairs.

Some common symptoms of patellar subluxation include:

Symptoms of patellar subluxation can be quite uncomfortable and may include visible deformity, severe knee pain, and swelling. These symptoms can make everyday activities like walking up and down stairs or even squatting difficult.

A patellar subluxation may cause a popping sound or sensation, as well as a feeling of the knee "giving away." This can be a frightening experience, but it's essential to seek medical attention to prevent further complications.

Here are some common symptoms of patellar subluxation:

In diagnosing patellar subluxation, a healthcare provider will perform a physical examination, including bending and straightening your leg and palpating around your kneecap. They may also ask about your symptoms and what led to your kneecap sliding out of place.

Visible deformity can be a symptom of patella subluxation, making it easy to notice that something is wrong.

Severe knee pain is a common symptom, often described as feeling like the knee is "giving away" or experiencing a severe ache.

You may hear a popping sound or sensation as the kneecap moves out of place, which can be alarming.

Buckling or catching of the knee is another symptom, making it difficult to walk or move around comfortably.

Locking of the knee can occur, making it hard to bend or straighten the knee without feeling like it's stuck.

Instability of the knee is a common complaint, leaving you feeling unsteady or like the knee is going to give way.

Curious to learn more? Check out: Knee Patella Subluxation

Inability to squat or walk up and down stairs can be a symptom, making everyday activities challenging.

Here are some common symptoms of patella subluxation:

Patients typically complain of a dramatic, painful patellofemoral popping sensation with certain knee movements.

Often, patients have a history of previous patellofemoral surgery, which can make their symptoms worse.

This condition can be quite disabling and can severely limit activities, leaving patients apprehensive and avoiding activities and knee positions that may reproduce their symptoms or instability.

Patients often report that the patella shifts laterally, but in fact, the patella is subluxed medially in full extension, and as the knee flexes, the patella jumps laterally into the trochlear groove.

Other reported symptoms include anterior knee pain, swelling, "giving away" episodes, and difficulty navigating stairs.

A study by Hughston et al found that 85% of patients were unable to perform light recreational activities, and 69% reported severe or disabling knee pain.

A patella subluxation can be a recurring issue, often happening repeatedly and leading to complete dislocations. This repeated instability can cause damage to the cartilage, which may contribute to knee osteoarthritis over time.

The repeated strain on your kneecap can lead to cartilage damage, making it a serious issue to address early on.

You may still be able to walk after experiencing a patella subluxation, but it can feel uncomfortable or unsteady. This is because your kneecap still tracks in the groove, but it may not be doing so smoothly.

If you've experienced a patella subluxation, you may hear a popping noise as your kneecap moves. This is a common symptom, and it can be a sign that your kneecap is not tracking properly.

Here are some common symptoms of a patella subluxation:

Patellar subluxation can affect anyone, but it's especially common in people who have weak leg muscles and more tendon laxity.

People between the ages of 10 to 20 years old are more prone to patellar subluxations. This is a critical age group, as their bones, muscles, and tendons are still developing.

Being physically active is another risk factor, as it puts additional stress on the knee joint. If you're an athlete or participate in sports, you're more likely to experience patellar subluxation.

Females are also more susceptible to patellar subluxations. This may be due to differences in muscle strength, tendon laxity, or other factors.

Tall individuals are also at a higher risk, as their longer legs and knees may be more prone to instability.

A direct blow to the front or side of the knee can cause patellar subluxation, especially if it pushes the kneecap out of its groove.

Injuries like this are the most common cause of patellar subluxations, especially in contact sports like football.

Here are some common causes of patellar subluxation:

People who participate in contact sports are especially prone to patellar subluxation. Sudden twisting of the knee while the lower leg is planted to the ground can also cause the condition.

Your healthcare provider will perform a physical examination to diagnose a patellar subluxation. They'll bend and straighten your leg and palpate (feel) around your kneecap, asking about your symptoms and what led to your kneecap sliding out of place.

Imaging tests may be ordered to confirm the diagnosis. These can include a knee X-ray, MRI scan, and CT scan.

A knee X-ray can show how the kneecap fits into the groove at the bottom of the patella and identify any other possible bone injuries.

Magnetic resonance imaging (MRI) can visualize the ligaments and other soft tissue around the patella, helping to confirm the diagnosis.

Dynamic MRI has been proposed to better assess patellar instability, but confounding factors can change the position of the patella in various degrees of knee flexion.

Imaging studies are often nonspecific for the diagnosis of medial patella dislocation, which is usually a diagnosis made by history and physical exam.

If you've suffered a patellar subluxation, you'll want to know about the treatment options available to you. The first step is usually conservative (nonsurgical) methods, especially if this is your first subluxation.

You can try the RICE method, which stands for rest, ice, compression, and elevation, to help reduce pain and swelling. NSAIDs like ibuprofen can also help alleviate pain and inflammation.

In some cases, your healthcare provider may recommend immobilization, such as a knee brace or cast, to keep your knee stable. You may also need to use walking aids like crutches or a cane to take weight off your knee.

Physical therapy is another important part of nonsurgical treatment, helping you stretch and strengthen the muscles surrounding your knee and improve balance. Orthotics, such as special shoes, can also help reduce pressure on your patella.

If your symptoms persist or you've had multiple subluxations, surgery may be necessary. Surgical options include lateral release, medial patellofemoral ligament (MPFL) repair, MPFL reconstruction, and osteotomy.

Here are some common nonsurgical treatment options:

Keep in mind that after a patellar subluxation, you have about a 33 percent chance of a recurrence.

Recovery time from a patellar subluxation can vary depending on several factors, including whether it's your first or a subsequent subluxation, the severity of your condition, and the treatment you received.

If it's your first subluxation and minor, with no surgery needed, you may recover within four to six weeks. Your healthcare provider will likely recommend physical therapy to help determine a timeline.

However, if you've had more than one subluxation, major damage, or needed surgery, your recovery time will take longer. You may be able to resume light activities within six to eight weeks, but it could take a year or more before you're able to play sports.

To prevent patellar subluxation, it's essential to keep the connective tissue that surrounds your kneecap strong. You can do this by getting physical activity that strengthens all your leg muscles, wearing knee pads when playing contact sports, and wearing a knee brace to prevent injuring your kneecap again if you've already done so.

Exercises that strengthen your quadriceps, such as squats and leg lifts, can also help reduce the risk of patellar subluxation. Additionally, wearing proper protective gear in contact sports is crucial to prevent all types of kneecap injuries.

Preventing patellar subluxation requires a combination of strengthening your leg muscles, wearing protective gear, and following your healthcare provider's instructions. You can prevent a subluxated patella by getting physical activity that strengthens all your leg muscles.

Wearing knee pads when playing contact sports can also help prevent injuries. This is especially important if you're involved in activities that involve a lot of running, jumping, or quick changes of direction.

Strengthening your quadriceps, inner and outer thighs, and hamstrings through exercises like squats, leg lifts, and hamstring curls can also reduce your risk for patellar subluxation. These exercises can help improve your overall knee stability.

If you've already had a kneecap injury, wearing a brace can help prevent recurrence. A knee brace can provide additional support and stability to your knee, reducing the risk of further injury.

Here are some exercises you can do to strengthen your leg muscles and prevent patellar subluxation:

Remember to always wear proper protective gear, including knee pads and a knee brace if necessary, when playing contact sports. This can help prevent injuries and reduce your risk for patellar subluxation.

Recovery time for a patella subluxation can vary greatly depending on the severity of your condition and what kind of treatment you received. If you're lucky, you may see a full recovery within four to six weeks if it's your first subluxation and you didn't need surgery.

If you've had more than one subluxation or needed surgery, your recovery time will be significantly longer. You may be able to resume light activities within six to eight weeks, but it could take a year or more before you're able to play sports.

In general, the recovery time for a patella subluxation can be broken down into several stages. Here's a rough estimate of what you can expect:

If you have symptoms that might indicate a patellar subluxation, it's essential to see your healthcare provider. You should look out for signs like pain and swelling, an inability to put weight on your leg, a popping or buckling sensation, and the kneecap appearing to pop out of its groove.

If you're unable to put weight on the leg, it's a clear indication that you need to see a doctor. This is a sign that something is seriously wrong.

Pain and swelling that don't improve with rest and ice are another reason to visit your healthcare provider. This could be a sign of a more severe condition.

A knee that's popping or giving way is also a cause for concern. It's a sign that the patellar subluxation is more than just a minor issue.

If you're unsure about how severe the condition is, it's always better to err on the side of caution and consult with a medical professional.

Here are some specific signs to look out for when deciding whether to see a doctor:

Kneecap injuries can be a real nuisance. Subluxation is another word for partial dislocation of a bone, and patellar subluxation is a partial dislocation of the kneecap.

The kneecap is a small protective bone that attaches near the bottom of your thigh bone, called the femur. As you bend and straighten your knee, your kneecap moves up and down in a groove at the bottom of the thigh, called the trochlea.

Several groups of muscles and ligaments hold your kneecap in place. When these become injured, your kneecap may move out of the groove, causing pain and difficulty flexing the knee.

Most injuries push the kneecap toward the outside of the knee. This can also damage the ligament on the inside of the knee, known as the medial patello-femoral ligament (MPFL).

Here are some common symptoms of patellar subluxation:

The extent of the dislocation determines whether it’s called a patellar subluxation or a dislocation. Patellar subluxations often happen repeatedly, and they can lead to complete dislocations.

Let's take a closer look at some case studies and treatment options for patellar subluxation.

Conservative treatment is often the first line of defense, but in some cases, surgery may be necessary. If you've had multiple episodes of patellar subluxation, your healthcare provider may recommend surgical options.

A 2015 study found that surgical treatment can lower the rate of recurrence of full dislocation of the kneecap, but the rate of recurrence of patellar subluxation remains almost the same.

Some common types of surgery for repeat episodes of patellar subluxation or dislocation include lateral release, MPFL repair, MPFL reconstruction, and osteotomy.

Surgical treatment options vary depending on the individual case, but the goal is always to improve patellar positioning and reduce the risk of further subluxation.

In some cases, a combination of conservative and surgical treatment may be necessary. For example, a patient may undergo physical therapy to strengthen the muscles surrounding the knee, followed by surgery to repair or reconstruct the MPFL.

A 2007 systematic review of 70 previous studies found little difference in long-term outcomes between those who had surgery for their patellar dislocation and those who didn’t. However, those who had surgery were less likely to have a second dislocation but more likely to develop arthritis in the knee.

Here are some common surgical treatment options for patellar subluxation:

It's worth noting that the effectiveness of surgical treatment can depend on the individual case and the severity of the subluxation. Your healthcare provider can help determine the best course of treatment for your specific situation.