M71.161

Clinical Causes: Bacterial infection introduced through a cut, scrape, or puncture wound near the knee. Repeated knee trauma or overuse leading to minor injuries that become infected. Spread of infection from nearby skin or soft tissue, such as cellulitis. Underlying health conditions like diabetes or immune system disorders that increase infection risk. Prolonged kneeling or pressure on the knee, which may facilitate bacterial entry.

Key Symptoms: Pain localized to the front or sides of the knee. Swelling and warmth around the affected area. Redness of the skin over the knee. Limited range of motion owing to discomfort or swelling. Tenderness when touching the knee. Possible fever or chills if the infection is severe. A feeling of stiffness or instability in the knee joint.

Diagnosis Path: Diagnosis involves a combination of clinical evaluation and diagnostic tests. A healthcare professional will review medical history, perform a physical examination, and may order the following tests: - **Aspiration of bursitis fluid:** To analyze the fluid for bacteria, crystals, or other indications of infection. - **Blood tests:** To identify signs of infection or inflammation. - **Imaging studies:** Such as X-rays or ultrasound, to evaluate the extent of swelling and rule out other causes. - **Culture and sensitivity tests:** To identify the specific microorganism involved and guide treatment.

Treatment Protocols: Treatment strategies focus on eliminating infection and reducing inflammation: - **Antibiotics:** Prescribed based on the causative organism, often requiring an initial sample analysis. - **Drainage of infected fluid:** May be necessary if there’s significant fluid accumulation. - **Rest and immobilization:** To decrease stress on the knee. - **Pain management:** Using over-the-counter or prescribed medications. - **Addressing underlying causes:** Such as managing diabetes or avoiding repetitive stress. In some cases, surgical intervention may be required to remove infected bursae or drain abscesses.