The average salary is 24,000, but most people earn less. Most people have an above average number of feet. In his fourth lesson of a weekly series, author Michael Blastland cracks the myth of the average.ith incomes, to take another example, many people are aware that the average in the UK (also known as the mean) is about 24,000 a year (in fact, about 463 a week).
Unlike a colonoscopy, however, the 'range' of a sigmoidoscopy is not as good; whilst a colonoscopy can visualise the entire large bowel, a sigmoidoscopy can only visualise as far as the sigmoid colon (it is therefore primarily used to visualise the rectum and parts of the sigmoid colon).nlike a colonoscopy, however, the 'range' of a sigmoidoscopy is not as good; whilst a colonoscopy can visualise the entire large bowel, a sigmoidoscopy can only visualise as far as the sigmoid colon (it is therefore primarily used to visualise the rectum and parts of the sigmoid colon).
A small video camera is attached to the colonoscope so that your doctor can take pictures or video of the large intestine (colon). The colonoscope can be used to look at the whole colon and the lower part of the small intestine. A test called sigmoidoscopy shows only the rectum and the lower part of the colon. Before this test, you will need to clean out your colon (colon prep). Colon prep takes 1 to 2 days, depending on which type of prep your doctor recommends. Some preps may be taken the evening before the test.