1.2.8. Primary outcome.
The success rate on the first attempt will be considered as the dependent variable. Insertion success will be defined as the successful passage of the tube on the first attempt and confirmed by radiography of the correct anatomical positioning of the tube distal tip, which will be performed immediately after the procedure. If the nasally placed small-bowel feeding tube is not successfully inserted, it will be considered a failure and recorded as an unsuccessful attempt. Subsequently, new attempts will be performed.The number of attempts required for successful insertion will be recorded for each patient. It should be noted that if more than 3 attempts are required, the procedure will be declared unsuccessful and data will be used to count failures. In these cases, the researchers may use another method of free choice for nasally placed small-bowel feeding tube insertion.