M71.06

Clinical Causes: Bacterial infection entering the bursa through a cut, wound, or puncture injury near the knee Spread of infection from nearby skin infections or other tissues Repeated or excessive knee movements causing irritation and inflammation Pre-existing conditions that compromise immunity or impair healing, such as diabetes Trauma or direct blow to the knee resulting in injury or rupture of the bursa Invasive procedures or injections into the knee area

Key Symptoms: Localized swelling over the knee that may be warm or tender Intense or throbbing pain in the affected knee Redness or discoloration around the bursa Limited range of motion, often due to pain or swelling Fever or chills if the infection is severe or systemic Increased discomfort with movement or pressure on the knee Feelings of warmth or increased joint sensitivity

Diagnosis Path: Diagnosing an abscess of the knee bursa involves a combination of clinical evaluation and diagnostic tests. A healthcare provider will perform a physical examination to assess swelling, tenderness, and range of motion. Imaging studies such as ultrasound or MRI may be used to visualize the abscess and rule out other causes of knee pain. Sometimes, a sample of the fluid from the bursa is extracted using needle aspiration for laboratory analysis to identify the infectious organism. Blood tests may also be ordered to check for signs of systemic infection.

Treatment Protocols: Treatment strategies aim to eliminate the infection and reduce inflammation. These typically include: - **Antibiotic therapy**: Prescribed based on the bacteria identified, or empirically if the infection is suspected to be bacterial. - **Drainage**: Surgical or needle drainage of the abscess helps remove pus, alleviate pressure, and facilitate healing. - **Rest and elevation**: Keeping the knee immobilized and elevated helps control swelling. - **Pain management**: Use of analgesics or anti-inflammatory medications to reduce pain and inflammation. - **Addressing underlying causes**: Managing any contributing health conditions, such as diabetes or immune system issues. In severe or complicated cases, surgical intervention may be necessary to remove infected tissue or perform more extensive debridement. Recovery involves monitoring for recurring infections and ensuring proper wound care to prevent further complications.