Background. Interscalene nerve block refers to the technique of anesthetizing the roots or trunks of the brachial plexus in the neck between the anterior and middle scalene muscles.The procedure was first well described and popularized by Alon Winnie in 1970.pence et al compared the effectiveness of an injection between the middle scalene muscle and brachial plexus sheath (periplexus) with an injection within the brachial plexus sheath (intraplexus) in 170 patients. There was no difference between the 2 groups in block onset times or block quality.
It's worth the hassle. Colonoscopy can spot small colon cancers while they are treatable and before they have spread to other parts of the body. It can also detect and remove polyps, small growths that can develop into colon cancer.
1 You are right. 2  There is colonoscopy (whole colon), sigmoidoscopy (rectum and last 2 feet of colon), proctoscopy (just the rectum), and anoscopy (just the anus). 3  For colorectal cancer screening, total colonoscopy is by far the best. 4  Its downside is the prep and the cost. If you have a close relative with colorectal cancer or polyps, your risk is higher. 2  You should start colonoscopy earlier and do it more frequently, depending on how strong the family history is. 3  For example, the average risk of colorectal cancer in the United States is 6 percent.