Dr. Ebraheim’s educational animated video describes the condition of Bone Infection and Osteomyelitis in asimple and easy way, telling you all you need to know about those conditions.
Chronic osteomyelitis is an infection in a bone. It may be an incurable problem.
What happens with bone infections (osteomyelitis)? Usually, bacteria causes infection in the bone. Leukocytes are attracted to the area and secrete enzymes in an attempt to kill the bacteria. Blood flow to the area is decreased and a devitalized, necrotic bone is formed called sequestrum. A sequestrum is infected dead bone resulting from osteomyelitis. Haversian canals surround blood vessels and nerve cells throughout the bone. The sequestrum has no connection to normal bone through the Haversian system (osteon). Due to avascular nature of the sequestrum, antibiotics cannot reach the sequestrum or the bacteria. In fact, the bacteria enters the bone cells and hides inside the bone cells. The involucrum is new bone formation around the sequestrum. The body is trying to seal off the infection by forming new bone. The sequestrum will drain through the sinus. Biopsy of the sinus is not representative. Multiple deep samples are needed. Biopsy of the sinus is important in long standing cases of osteomyelitis to rule out squamous cell sarcoma.
Principles of surgical treatment for osteomyelitis:
Open the involucrum
Remove the sequestrum
Saucerize the bone: make sure a pathological fracture isn’t created. Stabilize if needed (external fixator is usually preferred)
Fill cavity with bone chips, cement or muscle flap if needed: antibiotics usually for 6 weeks (organism specific). Recurrence of infection is high – about 30%.
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Background music provided as a free download from YouTube Audio Library.
Song Title: Every Step
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