For small bowel feeding the placement of a jejunal feeding tube is necessary. There are several possibilities to place the tube in the small bowel. An excellent method still is endoscopy, which has a success rate up to 98% and moreover allows an evaluation of the upper GI-tract concerning pathologies. However, it is a rather time consuming procedure, which is of limited availability and requires trained staff. As more simple alternatives unguided tubes and their placement in the small bowel were tested and showed success rates up to 75% only. One of these alternatives is a jejunal feeding tube, which is placed using an electromagnetic sensing technique to visualize the placement process on a bedside monitor (CORTRAK™). The aim of this study is the evaluation of the success rate of jejunal tube placement comparing the endoscopic versus the electromagnetic method in a comparative ICU patient population.