Emergency Central is a collection of disease, drug, and test information including 5-Minute Emergency Medicine Consult, Davis’s Drug, McGraw-Hill Medical’s Diagnosaurus®, Pocket Guide to Diagnostic Tests, and MEDLINE Journals created for emergency medicine professionals. Explore these free sample topics:
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- Bursae are synovial fluid-filled sacs:
- ∼150 are located between bones, ligaments, tendons, muscles, and skin.
- They provide lubrication to reduce friction during movement.
- Bursitis is inflammation of a bursa caused by trauma and overuse, infection, crystal deposition, or systemic disease.
- Chronic bursitis can lead to proliferative changes in the bursa.
- Commonly affected sites:
- Shoulder (subacromial)
- Elbow (olecranon): Usually secondary to trauma
- Hip (greater trochanter, ischial, iliopsoas): More common in elderly
- Knee (prepatellar and pes anserine): Secondary to trauma or arthritis
- Foot (calcaneal): Almost always secondary to improperly fitting shoes/heels
- Trauma (most common cause):
- Specific traumatic event or repetitive use of associated joints
- Infection: Secondary to direct penetration; may be obvious or microscopic:
- Higher risk with diabetes, chronic alcohol abuse, uremia, gout, immunosuppression
- 90% caused by Staphylococcus spp.
- Crystal deposition: Calcium phosphate, urate
- Systemic disease: Rheumatoid arthritis, gout, ankylosing spondylitis, psoriatic arthritis, lupus, rheumatic fever