About Septic Arthritis
Septic arthritis, also known as infectious arthritis, occurs when an infection reaches the joints. The underlying causes of septic arthritis include:
- Infection spreading through the bloodstream: An infection in another part of the body can travel through the bloodstream and reach a joint.
- Direct introduction of bacteria: Injury or surgery near a joint can introduce bacteria into the joint space.
- Joint infection as a complication of surgery or joint injection: In some cases, infections can develop after surgical procedures or injections into the joints.
The non-modifiable risk factors for septic arthritis are disease factors that cannot be changed or controlled, and can include:
- Age: Being over 80 years old increases the risk.
- Existing health conditions: Having diseases like rheumatoid arthritis, gout, lupus, or osteoarthritis increases the risk.
- Joint damage: Previous joint surgeries or injuries can make a person more susceptible to infection.
The modifiable risk factors for septic arthritis are disease factors that can be modified or controlled, and include:
- Indwelling urinary catheter: Having a urinary catheter in place increases the risk.
- Weakened immune system: Conditions like HIV, organ transplants, and certain medications that suppress the immune system increase the risk.
- Skin infections: Existing infections of the skin, genitals, or urinary tract increase the risk.
- Injectable drug use: Using injectable drugs raises the risk.
It's important to consult with a healthcare professional for personalized advice regarding your individual situation.
The most common early symptoms of septic arthritis include:
- Intense pain and swelling in the affected joint
- Fever
- Chills
As septic arthritis progresses or becomes more severe, the following symptoms may occur:
- Redness or warmth in the affected joint
- Loss of range of motion in the joint
- Fatigue
- Weakness
- Changes in appetite
- Increased irritability
- Skin rashes
In some cases, septic arthritis can affect multiple joints, although it typically starts with one joint. The knee is the most commonly affected joint, but it can also affect the wrists, hips, shoulders, elbows, and other joints.
It's important to seek medical attention promptly if you experience symptoms of septic arthritis. If left untreated, it can lead to permanent joint damage, disability, and even life-threatening complications such as bone infections or sepsis. Remember to consult with your healthcare professional for an accurate diagnosis and appropriate treatment.
To diagnose septic arthritis, doctors typically perform the following examinations, tests, and procedures:
- Medical history: Your doctor will ask about your symptoms and medical history.
- Physical exam: A thorough examination of the affected joint will be conducted.
- Joint fluid analysis: A sample of fluid is taken from the affected joint, and is analyzed to observe its appearance, perform cultures, Gram stain, and potentially a polymerase chain reaction (PCR) test to determine the specific organism causing the infection.
- Sensitivity testing: Testing the sensitivity of the bacteria to different antibiotics helps guide treatment decisions.
- Blood tests: These may include C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), complete blood count (CBC), and blood culture to assess immune activity and look for infections in the blood.
- Imaging tests: X-rays, ultrasound, CT or MRI scans may be used to assess joint damage and rule out other conditions.
To determine the stage or severity of septic arthritis, additional examinations and tests may include:
- Arthrocentesis: This procedure involves taking a sample of joint fluid for further analysis.
- Bone biopsy: In some cases, a biopsy of the bone may be performed to identify the microorganism causing the infection.
Remember, these are general procedures and may vary depending on individual cases. It's important to consult with a healthcare professional for personalized diagnosis and treatment recommendations.
The goals of treatment for septic arthritis are to control pain and reduce joint damage. Here are the different types of treatments and how they work to achieve these goals:
Medications:
- Antibiotics: Prescribed to kill the bacteria causing the infection. They can be administered intravenously or orally.
Therapies:
- Physiotherapy: Helps manage long-term effects of septic arthritis and improve joint mobility and strength.
- Occupational therapy: Assists with daily activities and helps individuals adapt to any limitations caused by the condition.
Procedures:
- Joint fluid drainage: Doctors may drain the infected synovial fluid from the joint, which helps remove bacteria and reduce inflammation.
- Surgery: In some cases, orthopedic surgery may be necessary to address severe joint damage or complications.
Health behavior changes:
- Gentle movement and exercise plan: Following treatment, individuals need to follow a plan to build muscle strength and increase range of motion.
It's important to consult with a healthcare professional for personalized advice and guidance regarding medication dosing, therapy options, and surgical interventions. Medication dosing may be affected by many factors. Check with your health care professional about dosing for your individual situation. Other side effects can occur. Check with your health care professional or read the information provided with your medication for additional side effect information.