Please forward this error screen to 193. Please forward this error screen to sharedip-10718044127. Please forward this error screen to 216. For the route of administration, anatomy of film 6th edition pdf Rectal administration.
The rectum is the final straight portion of the large intestine in humans and some other mammals, and the gut in others. The rectum lies in front of the sacrum. The rectum is a part of the lower gastrointestinal tract. The rectum is a continuation of the sigmoid colon, and connects to the anus. Unlike other portions of the colon, the rectum does not have taeniae coli. The rectum connects with the sigmoid colon at the level of S3, and connects with the anal canal as it passes through the pelvic floor muscles. Pelvic floor formed by levator ani muscles.
Rectovesical fascia of Denonvillers, which extends from rectum behind to the seminal vesicles and prostate in front. The rectum acts as a temporary storage site for feces. As the rectal walls expand due to the materials filling it from within, stretch receptors from the nervous system located in the rectal walls stimulate the desire to defecate. When the rectum becomes full, the increase in intrarectal pressure forces the walls of the anal canal apart, allowing the fecal matter to enter the canal. The rectum shortens as material is forced into the anal canal and peristaltic waves propel the feces out of the rectum. For the diagnosis of certain ailments, a rectal exam may be done. A colonoscopy or sigmoidoscopy are forms of endoscopy that use a guided camera to view the rectum.
These may have the ability to take biopsies if needed, and may be used to diagnose diseases such as cancer. Body temperature can also be taken in the rectum. By their definitions, suppositories are inserted, and enemas are injected, via the rectum. One cause of constipation is faecal impaction in the rectum, in which a dry, hard stool forms. It is also in the long-term management of neurogenic bowel, seen most frequently in people with a spinal cord injury or multiple sclerosis. Digital rectal stimulation, the insertion of one finger into the rectum, may be used to induce peristalsis in patients whose own peristaltic reflex is inadequate to fully empty the rectum.
Proctitis is inflammation of the anus and the rectum. Rectal cancer, a subgroup of colorectal cancer specific to the rectum. Rectal prolapse, referring to the prolapse of the rectum into the anus or external area. This is commonly caused by a weakened pelvic floor after childbirth. Ulcerative colitis, one form of inflammatory bowel disease that causes ulcers that affect the rectum. This may be episodic, over a person’s lifetime. These may cause blood to be visible in the stool.
Due to the proximity of the anterior wall of the rectum to the vagina in females or to the prostate in males, and the shared nerves thereof, rectal stimulation or penetration can result in sexual arousal. English rectum is derived from the full Latin expression intestinum rectum. American Joint Committee on Cancer, 2006, p. This page was last edited on 17 February 2018, at 19:07. A Doody’s Core Title for 2017!
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