The brachial plexus at the interscalene level is seen lateral to the carotid artery, between the anterior and middle scalene muscles (Figures 2, 3, and 4). Prevertebral fascia, superficial cervical plexus and sternocleidomastoid muscle are seen superficial to the plexus.he goal of the continuous interscalene block is similar to the non-ultrasound-based techniques: to place the catheter in the vicinity of the trunks of the brachial plexus between the scalene muscles.
A colonoscopy is similar to a sigmoidoscopy, but a longer flexible viewing tube called a colonoscope is used to examine the entire colon and (if necessary) the lower portion of the small intestine. It is typically performed to detect colorectal cancer and to determine the causes of rectal bleeding, chronic diarrhea, chronic constipation, or abdominal pain.
An endoscopic exam may be done to the upper or the lower gastrointestinal (GI) tract. An endoscopy of the upper gastrointestinal (GI) tract allows the physician to see the esophagus (the tube which attaches the mouth to the stomach), the stomach, and the duodenum (first part of the small bowel or intestine). This exam may be done to: Locate bleeding in the upper gastrointestinal tract.