Gas gangrene
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| Gas gangrene Classification and external resources | |
| ICD-10 | A48.0 |
|---|---|
| ICD-9 | 040.0 |
| DiseasesDB | 31141 |
| eMedicine | med/843 emerg/211 med/394 |
| MeSH | D005738 |
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Gas gangrene is a bacterial infection that produces gas within tissues in gangrene. It is a deadly form of gangrene usually caused by Clostridium bacteria. It is a medical emergency.
Features
Gas gangrene can cause myonecrosis, gas production, and sepsis. Progression to toxemia and shock is often very rapid.
Pathophysiology
Gas gangrene is caused by exotoxin-producing Clostridial species (most often Clostridium perfringens), which is mostly found in soil but also found as normal gut flora, and other anaerobes (e.g. Bacteroides and anaerobic streptococci). The exotoxin is commonly found in C. perfringens type A strain and is known as alpha toxin. These environmental bacteria may enter the muscle through a wound and go on to proliferate in necrotic tissue and secrete powerful toxins. These toxins destroy nearby tissue, generating gas at the same time.
A gas composition of 5.9% hydrogen, 3.4% carbon dioxide, 74.5% nitrogen and 16.1% oxygen was reported in one clinical case.[1]
Treatment
Treatment is usually debridement and excision with amputation necessary in many cases. Antibiotics alone are not effective because they don't penetrate ischemic muscles enough to be effective. However, penicillin is given as an adjuvant treatment to surgery. In addition to surgery and antibiotics, hyperbaric oxygen therapy (HBOT) is used and acts to inhibit the growth of and kill the anaerobic C. perfringens.
References
- ↑ ^ Chi CH, Chen KW, Huang JJ, Chuang YC, Wu MH (1995). "Gas composition in Clostridium septicum gas gangrene". J Formos Med Assoc 94 (12): 757-9. PMID 8541740.
External links
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
