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Enteral and Parenteral Nutrition PowerPoint Presentation

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Description : Check out this medical PowerPoint presentation titled "Enteral and Parenteral Nutrition" by Nazia Asad.

This medical PowerPoint presentation talks about enteral nutrition and parenteral nutrition, two different methods of providing essential nutrients to patients who cannot consume enough food orally.

Enteral nutrition involves delivering nutrients directly into the patients gastrointestinal tract, typically through a feeding tube that is inserted through the nose, mouth, or directly into the stomach or small intestine. This method is preferred when the patients digestive system is functioning normally and can absorb nutrients from food. Enteral nutrition is generally considered to be the most effective and safest way to provide nutrition to patients who cannot eat normally.

On the other hand, parenteral nutrition involves delivering nutrients directly into the patients bloodstream, typically through a vein. This method is used when the patients gastrointestinal tract is unable to absorb nutrients, such as in cases of severe malabsorption, bowel obstruction, or severe gastrointestinal disease. Parenteral nutrition is a more invasive method and requires careful monitoring for complications, such as infection or liver damage.

In general, enteral nutrition is preferred over parenteral nutrition whenever possible, as it is less invasive and associated with fewer complications. However, in some cases, parenteral nutrition may be necessary to provide adequate nutrition to critically ill patients who are unable to receive nutrients through their digestive tract. The choice of method depends on the individual patients medical condition and nutritional needs.

Tags : enteral nutrition, parenteral nutrition, critical care medicine, critical care medicine PowerPoint presentation

Published on : Mar 28, 2023 | Views : 2964 | Downloads : 4

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Enteral and Parenteral Nutrition Nazia Asad 28 Dec 2020
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What is parenteral nutrition? What is parenteral nutrition? Parenteral nutrition, or intravenous feeding, is a method of getting nutrition into your body through your veins. Depending on which vein is used, this procedure is often referred to as either total parenteral nutrition (TPN) or peripheral parenteral nutrition (PPN).This form of nutrition is used to help people who can’t or shouldn’t get their core nutrients from food. It’s often used for people with: Crohn’s disease cancer short bowel syndrome ischemic bowel disease
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Enteral tube feeding Nutrition plays an important role in maintaining health as well as in the prevention and management of a variety of diseases. Nutritional support is therapy for people who cannot get enough nourishment by eating or drinking.Enteral tube feeding is the delivery of nutrients directly into the digestive tract via a tube. The tube is usually placed into the stomach, duodenum or jejunum via either the nose, mouth or the direct percutaneous route. It is used to feed patients who cannot obtain an adequate oral intake from food and/or oral nutritional supplements, or who cannot eat/drink safely. Enteral feeding is used commonly in patients with dysphagia – any impairment of eating, drinking and swallowing.3
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TPN (Total Parenteral Nutrition)
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Gastrostomy feeding tubes are put in for different reasons. Gastrostomy feeding tubes are put in for different reasons. They may be needed for a short period of time or permanently. This procedure may be recommended for: People, potentially babies, with birth defects of the mouth, esophagus, or stomach (for example, esophageal atresia or tracheal esophageal fistula) Persons who cannot swallow correctly Persons who cannot take enough food by mouth to stay healthy
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What is exclusive enteral nutrition? What is exclusive enteral nutrition? Children with inflammatory bowel disease (IBD) often have trouble gaining weight. Intestinal inflammation often makes it difficult for their bodies to absorb the nutrients needed to help them grow. In addition, impaired bone growth and delayed puberty may also occur in children managing IBD. Exclusive Enteral Nutrition (EEN) is the recommended first-line therapy to treat active Crohn’s disease. The formula-based (no solid foods) diet is designed to induce remission in patients. It is a short-term program and may extend six to 12 weeks.
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Total parenteral nutrition (TPN) Parenteral nutrition is by definition given IV. Partial parenteral nutrition supplies only part of daily nutritional requirements, supplementing oral intake. Many hospitalized patients are given dextrose or amino acid solutions by this method. Total parenteral nutrition (TPN) supplies all daily nutritional requirements. TPN can be used in the hospital or at home. Because TPN solutions are concentrated and can cause thrombosis of peripheral veins, a central venous catheter is usually required. Parenteral nutrition should not be used routinely in patients with an intact gastrointestinal (GI) tract. Compared with enteral nutrition, it has the following disadvantages: It causes more complications. It does not preserve GI tract structure and function as well. It is more expensive. https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition
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Indications for TPN Indications TPN may be the only feasible option for patients who do not have a functioning GI tract or who have disorders requiring complete bowel rest, such as the following: Some stages of ulcerative colitis Bowel obstruction Certain pediatric GI disorders (eg, congenital GI anomalies, prolonged diarrhea regardless of its cause) Short bowel syndrome due to surgery
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Nutritional content Nutritional content TPN requires water (30 to 40 mL/kg/day), energy (30 to 35 kcal/kg/day, depending on energy expenditure; up to 45 kcal/kg/day for critically ill patients), amino acids (1.0 to 2.0 g/kg/day, depending on the degree of catabolism), essential fatty acids, vitamins, and minerals Children who need TPN may have different fluid requirements and need more energy (up to 120 kcal/kg/day) and amino acids (up to 2.5 or 3.5 g/kg/day).
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Nutritional content Basic TPN solutions are prepared using sterile techniques, usually in liter batches according to standard formulas. Normally, 2 L/day of the standard solution is needed. Solutions may be modified based on laboratory results, underlying disorders, hypermetabolism, or other factors. Most calories are supplied as carbohydrate. Typically, about 4 to 5 mg/kg/minute of dextrose is given. Standard solutions contain up to about 25% dextrose, but the amount and concentration depend on other factors, such as metabolic needs and the proportion of caloric needs that are supplied by lipids. https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition-tpn#:~:text=TPN%20
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Nutritional content Commercially available lipid emulsions are often added to supply essential fatty acids and triglycerides; 20 to 30% of total calories are usually supplied as lipids. However, withholding lipids and their calories may help obese patients mobilize endogenous fat stores, increasing insulin sensitivity. https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition-tpn#:~:text=TPN%20
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TPN Solutions TPN Solutions Many TPN solutions are commonly used. Electrolytes can be added to meet the patient’s needs. TPN solutions vary depending on other disorders present and patient age, as for the following: For renal insufficiency not being treated with dialysis or for liver failure: Reduced protein content and a high percentage of essential amino acids For heart or kidney failure: Limited volume (liquid) intake For respiratory failure: A lipid emulsion that provides most of nonprotein calories to minimize carbon dioxide production by carbohydrate metabolism For neonates: Lower dextrose concentrations (17 to 18%) https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition-tpn#:~:text=TPN%20
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Beginning TPN administration Beginning TPN administration Because the central venous catheter needs to remain in place for a long time, strict sterile technique must be used during insertion and maintenance of the TPN line. The TPN line should not be used for any other purpose. External tubing should be changed every 24 hours with the first bag of the day. In-line filters have not been shown to decrease complications. Dressings should be kept sterile and are usually changed every 48 hours using strict sterile techniques. If TPN is given outside the hospital, patients must be taught to recognize symptoms of infection, and qualified home nursing must be arranged. The solution is started slowly at 50% of the calculated requirements, using 5% dextrose to make up the balance of fluid requirements. Energy and nitrogen should be given simultaneously. The amount of regular insulin given (added directly to the TPN solution) depends on the plasma glucose level; if the level is normal and the final solution contains 25% dextrose, the usual starting dose is 5 to 10 units of regular insulin/L of TPN fluid. https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition-tpn#:~:text=TPN%20
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Monitoring Monitoring Progress of patients with a TPN line should be followed on a flowchart. An interdisciplinary nutrition team, if available, should monitor patients. Weight, complete blood count, electrolytes, and blood urea nitrogen should be monitored often (eg, daily for inpatients). Plasma glucose should be monitored every 6 hours until patients and glucose levels become stable. Fluid intake and output should be monitored continuously. When patients become stable, blood tests can be done much less often. Liver tests should be done. Plasma proteins (eg, serum albumin, possibly transthyretin or retinol-binding protein), prothrombin time, plasma and urine osmolality, and calcium, magnesium, and phosphate should be measured twice/week. Changes in transthyretin and retinol-binding protein reflect overall clinical status rather than nutritional status alone. If possible, blood tests should not be done during glucose infusion. Full nutritional assessment (including BMI calculation and anthropometric measurements) should be repeated at 2-week intervals. https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition-tpn#:~:text=TPN%20
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Complications Complications About 5 to 10% of patients with a TPN line have complications related to central venous access. Catheter-related sepsis rates have decreased since the introduction of guidelines that emphasize sterile techniques for catheter insertion and skin care around the insertion site. The increasing use of dedicated teams of physicians and nurses who specialize in various procedures including catheter insertion also has accounted for a decrease in catheter-related infection rates. Glucose abnormalities (hyperglycemia or hypoglycemia) or liver dysfunction occurs in > 90% of patients. https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition-tpn#:~:text=TPN%20
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Complications Glucose abnormalities are common. Hyperglycemia can be avoided by monitoring plasma glucose often, adjusting the insulin dose in the TPN solution, and giving subcutaneous insulin as needed. Hypoglycemia can be precipitated by suddenly stopping constant concentrated dextrose infusions. Treatment depends on the degree of hypoglycemia. Short-term hypoglycemia may be reversed with 50% dextrose IV; more prolonged hypoglycemia may require infusion of 5 or 10% dextrose for 24 hours before resuming TPN via the central venous catheter. Hepatic complications include liver dysfunction, painful hepatomegaly, and hyperammonemia. They can develop at any age but are most common among infants, particularly premature ones (whose liver is immature). Liver dysfunction may be transient, evidenced by increased transaminases, bilirubin, and alkaline phosphatase; it commonly occurs when TPN is started. Delayed or persistent elevations may result from excess amino acids. Pathogenesis is unknown, but cholestasis and inflammation may contribute. Progressive fibrosis occasionally develops. Reducing protein delivery may help. Painful hepatomegaly suggests fat accumulation; carbohydrate delivery should be reduced. Hyperammonemia can develop in infants, causing lethargy, twitching, and generalized seizures. Arginine supplementation at 0.5 to 1.0 mmol/kg/day can correct it. https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition-tpn#:~:text=TPN%20
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Complications If infants develop any hepatic complication, limiting amino acids to 1.0 g/kg/day may be necessary. Abnormalities of serum electrolytes and minerals should be corrected by modifying subsequent infusions or, if correction is urgently required, by beginning appropriate peripheral vein infusions. Vitamin and mineral deficiencies are rare when solutions are given correctly. Elevated blood urea nitrogen may reflect dehydration, which can be corrected by giving free water as 5% dextrose via a peripheral vein. Volume overload (suggested by > 1 kg/day weight gain) may occur when patients have high daily energy requirements and thus require large fluid volumes. Metabolic bone disease, or bone demineralization (osteoporosis or osteomalacia), develops in some patients given TPN for > 3 months. The mechanism is unknown. Advanced disease can cause severe periarticular, lower-extremity, and back pain. https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition-tpn#:~:text=TPN%20
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Complications Adverse reactions to lipid emulsions (eg, dyspnea, cutaneous allergic reactions, nausea, headache, back pain, sweating, dizziness) are uncommon but may occur early, particularly if lipids are given at > 1.0 kcal/kg/hour. Temporary hyperlipidemia may occur, particularly in patients with kidney or liver failure; treatment is usually not required. Delayed adverse reactions to lipid emulsions include hepatomegaly, mild elevation of liver enzymes, splenomegaly, thrombocytopenia, leukopenia, and, especially in premature infants with respiratory distress syndrome, pulmonary function abnormalities. Temporarily or permanently slowing or stopping lipid emulsion infusion may prevent or minimize these adverse reactions. Gallbladder complications include cholelithiasis, gallbladder sludge, and cholecystitis. These complications can be caused or worsened by prolonged gallbladder stasis. Stimulating contraction by providing about 20 to 30% of calories as fat and stopping glucose infusion several hours a day is helpful. Oral or enteral intake also helps. Treatment with metronidazole, ursodeoxycholic acid, phenobarbital, or cholecystokinin helps some patients with cholestasis. https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition-tpn#:~:text=TPN%20
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Key Points Key Points Consider parenteral nutrition for patients who do not have a functioning gastrointestinal tract or who have disorders requiring complete bowel rest. Calculate requirements for water (30 to 40 mL/kg/day), energy (30 to 35 kcal/kg/day, depending on energy expenditure; up to 45 kcal/kg/day for critically ill patients), amino acids (1.0 to 2.0 g/kg/day, depending on the degree of catabolism), essential fatty acids, vitamins, and minerals. Choose a solution based on patient age and organ function status; different solutions are required for neonates and for patients who have compromised heart, kidney, or lung function. Use a central venous catheter, with strict sterile technique for insertion and maintenance. Monitor patients closely for complications (eg, related to central venous access; abnormal glucose, electrolyte, mineral levels; hepatic or gallbladder effects; reactions to lipid emulsions, and volume overload or dehydration). https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition-tpn#:~:text=TPN%20
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References https://www.healthline.com/health/parenteral-nutrition https://www.bostonscientific.com/en-US/patients/health-conditions/enteral-feeding.html https://www.childrenshospital.org/conditions-and-treatments/treatments/een https://www.msdmanuals.com/professional/nutritional-disorders/nutritional-support/total-parenteral-nutrition-tpn#:~:text=TPN%20
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ACKNOWLEDGEMENT Allah Almighty My mother and my son
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Thank you
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Questions