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Key Terms
Chapter 13
Term | Definition |
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Biopsy | The surgical removed and examination of tissue from the living body. Biopsies generally are performed to determine whether a tumor is benign or malignant |
Colonoscopy | The visualization of the rectum and the entire colon using a colonoscope |
Colonoscope | An endoscope that is specially designed for passage through the anus to permit visualization of the rectum and the entire length of the colon |
Endoscope | An instrument that consists of a tube and an optical system that is used for direct visual inspection of organs or cavities |
Insufflate | To blow a powder, vapor, or gas into a body cavity |
Melena | The darkening of the stool caused by the presence of blood in an amount of 50 ml or greater |
Occult blood | Blood in such a small amount that it is not detectable by the unaided eye |
Peroxidase | A substance that is able to transfer oxygen from hydrogen peroxide to oxidize guaiac, causing the guaiac to turn blue |
Sigmoidoscope | An endoscope that is specially designed for passage through the anus to permit visualization of the rectum and sigmoid colon |
Sigmoidoscopy | The visual examination of the rectum and sigmoid colon using a sigmoidoscope |