Feeding, artificial, By nasogastric tube: A How-To Guide

Introduction: Feeding, artificial, By nasogastric tube, also known as NG tube feeding, is a method of providing nutrition directly into the stomach through a flexible tube inserted through the nose and into the stomach. This technique is used when individuals are unable to meet their nutritional needs by eating or drinking normally, either due to medical conditions or other circumstances. NG tube feeding can be a temporary or long-term solution, depending on the patient’s needs.

Indications for Nasogastric Tube Feeding

Nasogastric (NG) tube feeding may be recommended for various clinical conditions that impair a person’s ability to consume sufficient nutrients orally. Some common indications include:

• Neurological disorders (e.g., stroke, Parkinson’s disease, Alzheimer’s disease)
• Head and neck cancers or injuries
• Gastrointestinal disorders (e.g., Crohn’s disease, ulcerative colitis)
• Mechanical issues with swallowing or chewing
• Chronic conditions that affect appetite or nutrient absorption
• Critically ill patients in intensive care units

NG tube feeding may be used for short-term nutritional support during acute illnesses or recovery periods, or it can be a long-term solution for individuals with chronic conditions that impair oral intake.

Sources: https://www.ncbi.nlm.nih.gov/books/NBK559044/ https://www.uptodate.com/contents/enteral-nutrition-in-adults-indications-and-access-sites

Types of Nasogastric Tubes

Nasogastric tubes come in various sizes and materials, allowing healthcare providers to choose the appropriate option based on the patient’s needs and the intended duration of use. Common types of NG tubes include:

• Polyvinyl chloride (PVC) tubes: Flexible and disposable, available in different French sizes (e.g., 6 Fr, 8 Fr, 10 Fr)
• Polyurethane tubes: Soft and flexible, suitable for longer-term use
• Weighted or non-weighted tubes: Weighted tubes have a metal tip to aid in insertion
• Wide-bore tubes: Larger diameter tubes for administering thicker formulas or medications

The selection of the appropriate NG tube depends on factors such as the patient’s age, clinical condition, and the anticipated duration of feeding.

Sources: https://www.ncbi.nlm.nih.gov/books/NBK559044/ https://www.nursingworld.org/practice-policy/scope-of-practice/feeding-and-swallowing/nasogastric-tubes/

Insertion of Nasogastric Tubes

The insertion of an NG tube is typically performed by a trained healthcare professional, such as a nurse or physician. The procedure involves the following steps:

1. Prepare the patient and gather the necessary equipment (e.g., NG tube, lubricant, pH indicator paper, stethoscope).
2. Measure and mark the appropriate length of the tube to be inserted.
3. Lubricate the end of the tube and carefully insert it through one of the patient’s nostrils, following the curvature down the back of the throat and into the esophagus.
4. Advance the tube gently until the marked length is reached.
5. Confirm the placement of the tube using appropriate methods (see the next section).
6. Secure the tube in place and connect it to the feeding setup or pump.

Proper insertion technique, patient positioning, and regular monitoring are crucial to ensure the safe and effective delivery of nutrition through the NG tube.

Sources: https://www.ncbi.nlm.nih.gov/books/NBK559044/ https://www.nursingworld.org/practice-policy/scope-of-practice/feeding-and-swallowing/nasogastric-tubes/

Confirming NG Tube Placement

After inserting the NG tube, it is crucial to confirm its proper placement in the stomach to prevent potential complications, such as inadvertent insertion into the lungs (aspiration). Common methods for confirming NG tube placement include:

• X-ray: An X-ray image can clearly show the position of the tube’s tip in the stomach.
• pH testing: Aspirating and testing the gastric contents for an acidic pH level (typically below 5.5) indicates correct placement in the stomach.
• Air insufflation: Injecting a small amount of air through the tube and listening with a stethoscope for gurgling sounds in the stomach area can confirm proper placement.
• Visual inspection: In some cases, the tube’s length markings and the patient’s physical characteristics can provide visual cues about the tube’s position.

It is essential to follow established protocols and guidelines to ensure accurate confirmation of NG tube placement before initiating feeding or administering medications.

Sources: https://www.ncbi.nlm.nih.gov/books/NBK559044/ https://www.uptodate.com/contents/verification-of-feeding-tube-placement

Feeding Formulas for NG Tubes

Various artificial feeding formulas are available for use with NG tubes, designed to provide complete nutrition tailored to the patient’s specific needs. These formulas can be broadly categorized as follows:

• Polymeric formulas: These contain intact proteins, carbohydrates, and fats, suitable for individuals with intact digestive systems. Examples include Complan, Nutrauxil, and Fortison.
• Semi-elemental formulas: Containing partially hydrolyzed nutrients, these formulas are easier to digest and may be used for patients with impaired digestion or absorption.
• Elemental formulas: Composed of free amino acids, simple sugars, and fatty acids, these formulas are easily absorbed and may be used in cases of severe digestive impairment or malabsorption.
• Disease-specific formulas: Formulas tailored for specific conditions, such as diabetes, renal failure, or pulmonary disease.

The choice of feeding formula depends on factors such as the patient’s nutritional requirements, digestive capacity, and any underlying medical conditions.

Sources: https://www.ncbi.nlm.nih.gov/books/NBK559044/ https://www.uptodate.com/contents/enteral-nutrition-formulas-and-administration

Administration Methods

Feeding, artificial, By nasogastric tube can be administered using different methods, depending on the patient’s condition and the healthcare provider’s recommendations. The two main methods are:

1. Gravity feeding: In this method, the feeding formula is placed in a container or bag and allowed to flow into the stomach through the NG tube by gravity. This method is suitable for intermittent or bolus feedings.
2. Pump feeding: An enteral feeding pump is used to deliver the formula through the NG tube at a controlled rate. This method is often preferred for continuous feeding or when precise control over the feeding rate is required.

The choice between gravity feeding and pump feeding depends on various factors, such as the patient’s tolerance, the desired feeding rate, and the healthcare provider’s preference. In some cases, a combination of both methods may be used.

Sources: https://www.ncbi.nlm.nih.gov/books/NBK559044/ https://www.uptodate.com/contents/enteral-nutrition-formulas-and-administration

Using a Feeding Pump for NG Tube Feeding

When using a feeding pump for NG tube feeding, it is essential to follow the manufacturer’s instructions and healthcare provider’s guidance. Here are the general steps for setting up and operating a feeding pump:

1. Ensure the pump is clean, functional, and properly calibrated.
2. Load the feeding formula into the pump’s reservoir or attach the feeding bag.
3. Prime the tubing to remove any air bubbles.
4. Connect the tubing to the NG tube, ensuring a secure connection.
5. Program the pump with the desired feeding rate, volume, and any other necessary settings.
6. Start the pump and monitor the patient for any signs of discomfort, aspiration, or other complications.
7. Periodically check the pump and feeding setup for proper functioning and formula delivery.
8. Follow appropriate protocols for cleaning and maintaining the pump and tubing.

Feeding pumps offer precise control over the feeding rate and volume, reducing the risk of complications and ensuring the patient receives the required nutrition. However, it is essential to follow best practices and address any issues promptly.

Sources: https://www.ncbi.nlm.nih.gov/books/NBK559044/ https://www.uptodate.com/contents/enteral-nutrition-formulas-and-administration

Managing and Preventing Complications

While feeding, artificial, By nasogastric tube is generally safe, there are potential complications that healthcare providers and caregivers should be aware of and take steps to prevent or manage effectively. Common complications include:

• Aspiration: The accidental entry of feeding formula or gastric contents into the lungs, which can lead to pneumonia or other respiratory issues. Proper tube placement and positioning, as well as careful monitoring, are crucial to prevent aspiration.
• Tube clogging: Feeding formulas, medications, or improper flushing can cause the NG tube to become clogged, disrupting the delivery of nutrition. Regular flushing with water and following proper administration protocols can help prevent clogging.
• Infections: The insertion site and tube itself can become a source of infection if not properly cared for. Maintaining good hygiene, following aseptic techniques, and regularly changing the tube can help prevent infections.
• Gastrointestinal complications: Diarrhea, constipation, abdominal discomfort, or gastric reflux may occur, requiring adjustments to the feeding rate, formula, or medications.

Regular monitoring, proper tube care, and adherence to established protocols and guidelines can help minimize the risk of complications and ensure the safe and effective delivery of nutrition through the NG tube.

Sources: https://www.ncbi.nlm.nih.gov/books/NBK559044/ https://www.uptodate.com/contents/overview-of-enteral-nutrition

Patient Care and Comfort

Providing comprehensive care and addressing the comfort of patients receiving feeding, artificial, By nasogastric tube is essential for their overall well-being and treatment success. Some key considerations include:

• Daily care: Regularly inspecting the insertion site, cleaning around the tube, and ensuring proper securement can help prevent complications and maintain the patient’s comfort.
• Positioning: Appropriate positioning of the patient during and after feedings can aid digestion and prevent aspiration or reflux.
• Oral care: Regular mouth care and moisturization can help alleviate discomfort and maintain good oral hygiene.
• Psychological support: Providing emotional support, addressing concerns, and involving the patient and family in care decisions can