A patient with a new ileostomy is preparing to go home. What should the patient be taught about changing his ileostomy

The gastrointestinal (GI) tract is a continuous system responsible for the ingestion, digestion, absorption, and elimination of nutrients and waste. Digestion begins with the intake of food and progresses sequentially through several anatomical structures. Each segment of the GI tract plays a specific role in breaking down food and absorbing nutrients. Understanding the correct order of the digestive pathway is fundamental to grasping normal physiology.

Rationale:
A. The stomach is not the starting point of the gastrointestinal tract; it is an intermediate organ where mechanical and chemical digestion of food occurs after it has been swallowed. It mixes food with gastric acid and enzymes to form chyme. However, digestion does not begin in the stomach because food must first enter through the mouth.

B. The rectum is the final portion of the large intestine and functions in temporary storage of feces before defecation. It is involved in elimination, not the beginning of digestion. Therefore, it is located at the end of the GI tract rather than the start.

C. The small intestine is a major site of digestion and nutrient absorption but is not the initial entry point for food. Chyme enters the small intestine from the stomach, where further enzymatic digestion and absorption occur. It functions later in the digestive sequence.

D. The mouth is the correct starting point of the gastrointestinal tract where digestion begins. Mechanical breakdown through chewing and chemical digestion through salivary amylase initiate the digestive process. Food then passes through the pharynx and esophagus before reaching the stomach.

Insertion of a nasogastric (NG) tube is a common procedure used for gastric decompression, medication administration, or enteral feeding. Safe insertion requires correct measurement, positioning, and technique to ensure the tube reaches the stomach and not the respiratory tract. Proper preparation before insertion is essential to reduce complications such as malposition, aspiration, or trauma to the nasal and esophageal passages. Accurate measurement is a key initial step in the procedure.

Rationale:
A. Wearing sterile gloves is not required for NG tube insertion because the procedure is clean, not sterile. Standard clean technique with gloves is sufficient since the gastrointestinal tract is not sterile. Sterile gloves are reserved for procedures that require aseptic conditions, such as central line insertion or surgical procedures.

B. Asking the client to cough during insertion is not appropriate because coughing may indicate that the tube has entered the airway, which is a complication rather than a desired action. The nurse should instead assess for gagging, choking, or respiratory distress as signs of misplacement. The client is typically instructed to swallow during insertion to help guide the tube into the esophagus.

C. Placing the client in a left lateral position is not recommended for NG tube insertion. The preferred position is usually high-Fowler’s or upright to facilitate gravity-assisted passage of the tube into the esophagus and reduce aspiration risk. Lateral positioning does not support optimal anatomical alignment for safe insertion.

D. Determining the length of the NG tube prior to insertion is essential to ensure correct placement into the stomach. The standard method involves measuring from the tip of the nose to the earlobe and then to the xiphoid process (NEX method). Accurate measurement helps prevent complications such as pulmonary placement or inadequate gastric access.