In patients with malnutrition or people unable to consume enough nutrition a tube is used for parenteral feeding. It is called a nasogastric tube. The material is made of plastic or silicon. The tube has markings on it indicating the length. Under asceptic conditions tube is measured from firstly from nose to ear lobes and then measured to the xiphisternum. This marks the length of tube needed to be inserted according to every patient. It usually ranges from 55 to 65cm in adult patients. After application of a local anesthetic in the nasal opening and on the tip of the NG tube, it is advanced into the patent nasal opening. The patient is provided with a glass of water and advised to sip it slowly. This opens the esophagus facilitating tube passage.