Parenteral nutrition - wikipedia Parenteral nutrition Parenteral nutrition Home TPN formula ( edit on Wikidata ) Total parenteral nutrition ( PN ) is the feeding of a person intravenously, bypassing the usual process of eating and digestion. The person receives nutritional formulae that contain nutrients such as glucose, salts, amino acids, lipids and added vitamins and dietary minerals. It is called total parenteral nutrition ( TPN ) or total nutrient admixture ( TNA ) when no significant nutrition is obtained by other routes, and partial parenteral nutrition ( PPN ) when nutrition is also partially enteric. It may be called peripheral parenteral nutrition ( PPN ) when administered through vein access in a limb rather than through a central vein as central venous nutrition ( CVN ). Contents 1 Medical uses 1.1 Gastrointestinal disorders 1.2 In cancer 2 Duration 2.1 Living with TPN 3 Complications 3.1 Infection 3.2 Blood clots 3.3 Fatty liver and liver failure 3.4 Hunger 3.5 Cholecystitis 3.6 Gut atrophy 3.7 Other complications 3.8 Pregnancy 4 Total parenteral nutrition 5 Components 5.1 Prepared solutions 5.2 Added components 5.3 Emulsifier 6 History 7 See also 8 References 9 External links Medical uses Total parenteral nutrition ( TPN ) is provided when the gastrointestinal tract is nonfunctional because of an interruption in its continuity ( it is blocked, or has a leak - a fistula ) or because its absorptive capacity is impaired. It has been used for comatose patients, although enteral feeding is usually preferable, and less prone to complications. Parenteral nutrition is used to prevent malnutrition in patients who are unable to obtain adequate nutrients by oral or enteral routes. Gastrointestinal disorders TPN may be the only feasible option for providing nutrition to patients who do not have a functioning gastrointestinal tract or who have disorders requiring complete bowel rest, including bowel obstruction, short bowel syndrome, gastroschisis, prolonged diarrhea regardless of its cause, high - output fistula, very severe Crohn 's disease or ulcerative colitis, and certain pediatric GI disorders including congenital GI anomalies and necrotizing enterocolitis. In cancer The benefit of TPN to cancer patients is largely debated, and studies to date have generally showed minimal long term benefit. On the other hand, there is no evidence to support the idea that intravenous nutrition ' feeds the cancer, not the patient '. Duration Short - term PN may be used if a person 's digestive system has shut down ( for instance by peritonitis ), and they are at a low enough weight to cause concerns about nutrition during an extended hospital stay. Long - term PN is occasionally used to treat people suffering the extended consequences of an accident, surgery, or digestive disorder. PN has extended the life of children born with nonexistent or severely deformed organs. Living with TPN Approximately 40,000 people use TPN at home in the United States, and because TPN requires anywhere from 10 -- 16 hours to be administered, daily life can be affected. Although daily lifestyle can be changed, most patients agree that these changes are better than staying at the hospital. Many different types of pumps exist to limit the time the patient is `` hooked - up ''. Usually a backpack pump is used, allowing for mobility. The time required to be connected to the IV is dependent on the situation of each patient ; some require once a day, or five days a week. It is important for patients to avoid as much TPN related change as possible in their lifestyles. This allows for the best possible mental health situation ; constantly being held down can lead to resentment and depression. Physical activity is also highly encouraged, but patients must avoid contact sports ( equipment damage ) and swimming ( infection ). Many teens find it difficult to live with TPN due to issues regarding body image and not being able to participate in activities and events. Complications TPN fully bypasses the GI tract and normal methods of nutrient absorption. Possible complications, which may be significant, are listed below. Infection TPN requires a chronic IV access for the solution to run through, and the most common complication is infection of this catheter. Infection is a common cause of death in these patients, with a mortality rate of approximately 15 % per infection, and death usually results from septic shock. Blood clots Chronic IV access leaves a foreign body in the vascular system, and blood clots on this IV line are common. Death can result from pulmonary embolism wherein a clot that starts on the IV line breaks off and travels to the lungs, blocking blood flow. Micrograph of periportal fatty liver as may arise due to TPN. Trichrome stain. Patients on TPN who have such clots occluding their catheter may receive a thrombolytic flush to dissolve the clots and prevent further complications. Fatty liver and liver failure Fatty liver is usually a more long term complication of TPN, though over a long enough course it is fairly common. The pathogenesis is due to using linoleic acid ( an omega - 6 fatty acid component of soybean oil ) as a major source of calories. TPN - associated liver disease strikes up to 50 % of patients within 5 -- 7 years, correlated with a mortality rate of 2 -- 50 %. Onset of this liver disease is the major complication that leads TPN patients to requiring an intestinal transplant. Intralipid ( Fresenius - Kabi ), the US standard lipid emulsion for TPN nutrition, contains a 7 : 1 ratio of n - 6 / n - 3 ratio of polyunsaturated fatty acids ( PUFA ). By contrast, Omegaven has a 1 : 8 ratio and showed promise in multiple clinical studies. Therefore n - 3 - rich fat may alter the course of parenteral nutrition associated liver disease. Hunger Because patients are being fed intravenously, the subject does not physically eat, resulting in intense hunger pangs. The brain uses signals from the mouth ( taste and smell ), the stomach / G.I. tract ( fullness ) and blood ( nutrient levels ) to determine conscious feelings of hunger. In cases of TPN, the taste, smell and physical fullness requirements are not met, and so the patient experiences hunger, despite the fact that the body is being fully nourished. Patients who eat food despite the inability can experience a wide range of complications. Cholecystitis Total parenteral nutrition increases the risk of acute cholecystitis due to complete disuse of gastrointestinal tract, which may result in bile stasis in the gallbladder. Other potential hepatobiliary dysfunctions include steatosis, steatohepatitis, cholestasis, and cholelithiasis. Six percent of patients on TPN longer than 3 weeks and 100 % of patients on TPN longer than 13 weeks develop biliary sludge. The formation of sludge is the result of stasis due to lack of enteric stimulation and is not due to changes in bile composition. Gallbladder sludge disappears after 4 weeks of normal oral diet. Administration of exogenous cholecystokinin ( CCK ) or stimulation of endogenous CCK by periodic pulse of large amounts of amino acids have been shown to help prevent sludge formation. These therapies are not routinely recommended. Such complications are suggested to be the main reason for mortality in people requiring long - term total parenteral nutrition, such as in short bowel syndrome. In newborn infants with short bowel syndrome with less than 10 % of expected intestinal length, thereby being dependent upon total parenteral nutrition, 5 year survival is approximately 20 %. Gut atrophy Infants who are sustained on TPN without food by mouth for prolonged periods are at risk for developing gut atrophy. Other complications Other complications are either related to catheter insertion, or metabolic, including refeeding syndrome. Catheter complications include pneumothorax, accidental arterial puncture, and catheter - related sepsis. The complication rate at the time of insertion should be less than 5 %. Catheter - related infections may be minimised by appropriate choice of catheter and insertion technique. Metabolic complications include the refeeding syndrome characterised by hypokalemia, hypophosphatemia and hypomagnesemia. Hyperglycemia is common at the start of therapy, but can be treated with insulin added to the TPN solution. Hypoglycaemia is likely to occur with abrupt cessation of TPN. Liver dysfunction can be limited to a reversible cholestatic jaundice and to fatty infiltration ( demonstrated by elevated transaminases ). Severe hepatic dysfunction is a rare complication. Overall, patients receiving TPN have a higher rate of infectious complications. This can be related to hyperglycemia. Pregnancy Pregnancy can cause major complications when trying to properly dose the nutrient mixture. Because all of the baby 's nourishment comes from the mother 's blood stream, the doctor must properly calculate the dosage of nutrients to meet both recipient 's needs and have them in usable forms. Incorrect dosage can lead to many adverse, hard - to - guess effects, such as death, and varying degrees of deformation or other developmental problems. It is recommended that parenteral nutrition administration begin after a period of natural nutrition so doctors can properly calculate the nutritional needs of the fetus. Otherwise, it should only be administered by a team of highly skilled doctors who can accurately assess the fetus ' needs. Total parenteral nutrition Prescription lipid parenteral nutrition formulation Solutions for total parenteral nutrition may be customized to individual patient requirements, or standardized solutions may be used. The use of standardized parenteral nutrition solutions is cost effective and may provide better control of serum electrolytes. Ideally each patient is assessed individually before commencing on parenteral nutrition, and a team consisting of specialised doctors, nurses, clinical pharmacists and registered dietitians evaluate the patient 's individual data and decide what PN formula to use and at what infusion rate. For energy only, intravenous sugar solutions with dextrose or glucose are generally used. This is not considered to be parenteral nutrition as it does not prevent malnutrition when used on its own. Standardized solutions may also differ between developers. Following are some examples of what compositions they may have. The solution for normal patients may be given both centrally and peripherally. Examples of total parenteral nutrition solutions Substance Normal patient High stress Fluid - restricted Amino acids 85 g 128 g 75 g Dextrose 250 g 350 g 250 g Lipids 100 g 100 g 50 g Na 150 mEq 155 mEq 80 mEq 80 mEq 80 mEq 40 mEq Ca 360 mg 360 mg 180 mg Mg 240 mg 240 mg 120 mg Acetate 72 mEq 226 mEq 134 mEq Cl 143 mEq 145 mEq 70 mEq 310 mg 465 mg 233 mg MVI - 12 10 mL 10 mL 10 mL Trace elements 5 mL 5 mL 5 mL Components Prepared solutions Prepared solutions generally consist of water and electrolytes ; glucose, amino acids, and lipids ; essential vitamins, minerals and trace elements are added or given separately. Previously lipid emulsions were given separately but it is becoming more common for a `` three - in - one '' solution of glucose, proteins, and lipids to be administered. Added components Individual nutrient components may be added to more precisely adjust the body contents of it. That individual nutrient may, if possible, be infused individually, or it may be injected into a bag of nutrient solution or intravenous fluids ( volume expander solution ) that is given to the patient. Administration of individual components may be more hazardous than administration of pre-mixed solutions such as those used in total parenteral nutrition, because the latter are generally already balanced in regard to e.g. osmolarity and ability to infuse peripherally. Incorrect IV administration of concentrated potassium can be lethal, but this is not a danger if the potassium is mixed in TPN solution and diluted. Vitamins may be added to a bulk premixed nutrient immediately before administration, since the additional vitamins can promote spoilage of stored product. Vitamins can be added in two doses, one fat - soluble, the other water - soluble. There are also single - dose preparations with both fat - and water - soluble vitamins such as Cernevit. Minerals and trace elements for parenteral nutrition are available in prepared mixtures, such as Addaven. Emulsifier Only a limited number of emulsifiers are commonly regarded as safe to use for parenteral administration, of which the most important is lecithin. Lecithin can be biodegraded and metabolized, since it is an integral part of biological membranes, making it virtually non-toxic. Other emulsifiers can only be excreted via the kidneys, creating a toxic load. The emulsifier of choice for most fat emulsions used for parenteral nutrition is a highly purified egg lecithin, due to its low toxicity and complete integration with cell membranes. Use of egg - derived emulsifiers is not recommended for people with an egg allergy due to the risk of reaction. In situations where there is no suitable emulsifying agent for a person at risk of developing essential fatty acid deficiency, cooking oils may be spread upon large portions of available skin for supplementation by transdermal absorption. Another type of fat emulsion Omegaven is being used experimentally within the US primarily in the pediatric population. It is made of fish oil instead of the egg based formulas more widely in use. Research has shown use of Omegaven may reverse and prevent liver disease and cholestasis. History This section relies too much on references to primary sources. Please improve this section by adding secondary or tertiary sources. ( April 2014 ) Developed in the 1960s by Dr. Stanley J. Dudrick, who as a surgical resident in the University of Pennsylvania, working in the basic science laboratory of Dr. Jonathan Rhoads, was the first to successfully nourish initially Beagle puppies and subsequently newborn babies with catastrophic gastrointestinal malignancies. Dr. Dudrick collaborated with Dr. Willmore and Dr. Vars to complete the work necessary to make this nutritional technique safe and successful. See also Feeding tube Hickman line Intradialytic parenteral nutrition Intravenous therapy References Jump up ^ Kozier, B., & Erb, G., & Berman, A.J., & Burke, K., & Bouchal, S.R., & Hirst, S.P.. ( 2004 ). Fundamentals of Nursing : The Nature of Nursing Practice in Canada. Canadian Edition. Prentice Hall Health : Toronto. Jump up ^ American Gastroenterological Association medical position statement : parenteral nutrition ^ Jump up to : The Merck Manual, 2008 Jump up ^ Heird, WC ; Gomez, MR ( June 1994 ). `` Total parenteral nutrition in necrotizing enterocolitis ''. Clinics in perinatology. 21 ( 2 ) : 389 -- 409. PMID 8070233. ^ Jump up to : Yaworski, J.A. `` Total Parenteral Nutrition ( TPN ) Frequently Asked Questions ''. Children 's Hospital of Pittsburgh. Retrieved 30 March 2014. Jump up ^ `` Living with total parenteral nutrition ( TPN ) at home ''. Great Ormund Street Hospital for Children. Retrieved 30 March 2014. Jump up ^ Deshpande, KS ( July 2003 ). `` Total parenteral nutrition and infections associated with use of central venous catheters ''. American Journal of Critical Care. 12 ( 4 ) : 326 -- 7, 380. PMID 12882062. Jump up ^ Mollitt, DL ; Golladay ES. ( August 1983 ). `` Complications of TPN catheter - induced vena caval thrombosis in children less than one year of age ''. Journal of pediatric surgery. 18 ( 4 ) : 462 -- 7. doi : 10.1016 / S0022 - 3468 ( 83 ) 80201 - 2. PMID 6413671. Jump up ^ Mailloux, RJ ; DeLegge, MH ; Kirby, DF ( Nov -- Dec 1993 ). `` Pulmonary embolism as a complication of long - term total parenteral nutrition ''. JPEN. Journal of parenteral and enteral nutrition. 17 ( 6 ) : 578 -- 82. doi : 10.1177 / 0148607193017006578. PMID 8301814. Jump up ^ `` Evaluation of OMEGAVEN 10 % ® ( n - 3 EFA Lipid Emulsion ) in Home Parenteral Nutrition - associated Liver Disease ( MEGANORM ) ''. Retrieved 15 April 2013. Jump up ^ Piper, SN ; Rohm KD ( Dec 2009 ). `` Hepatocellular integrity after parenteral nutrition : comparison of a fish - oil - containing lipid emulsion with an olive - soybean oil - based lipid emulsion ''. Eur J Anaesthesiol. 26 ( 12 ) : 1076 -- 82. doi : 10.1097 / EJA. 0b013e32832e08e0. PMID 19916246. Jump up ^ Garg, M. Jones, R.M., Vaughan, R.B., Testro, A.G. ( 2011 ). Intestinal transplantation : Current status and future directions. Journal of Gastroenterology and Hepatology, 26, 1221 - 1228 Jump up ^ Kumar Jain, Ajay ; Teckman, Jeffrey H. ( 2014 ). `` Newly Identified Mechanisms of Total Parenteral Nutrition Related Liver Injury ''. Advances in Hepatology. 2014 : 1 -- 7. doi : 10.1155 / 2014 / 621380. ISSN 2356 - 6744. Jump up ^ Hunger ( motivational state ) Jump up ^ `` Bowel Obstruction ''. Women 's Health. Retrieved 30 March 2014. Jump up ^ Tucker, RA ; Jenkins, HL ( 1984 ). `` Acalculous cholecystitis and fever related to total parenteral nutrition ''. Drug intelligence & clinical pharmacy. 18 ( 11 ) : 897 -- 9. PMID 6437783. Jump up ^ Wang, H ; Khaoustov, VI ; Krishnan, B ; Cai, W ; Stoll, B ; Burrin, DG ; Yoffe, B ( October 2006 ). `` Total parenteral nutrition induces liver steatosis and apoptosis in neonatal piglets ''. The Journal of Nutrition. 136 ( 10 ) : 2547 -- 52. PMID 16988124. Jump up ^ Quigley EM, Marsh MN, Shaffer JL, Markin RS ( January 1993 ). `` Hepatobiliary complications of total parenteral nutrition ''. Gastroenterology. 104 ( 1 ) : 286 -- 301. PMID 8419252. Jump up ^ http://www.bcm.edu/gastro/VGICC/GI-M0054/09-DISC.HTM Jump up ^ Vanderhoof JA, Langnas AN ( 1997 ). `` Short - bowel syndrome in children and adults ''. Gastroenterology. 113 ( 5 ) : 1767 -- 78. doi : 10.1053 / gast. 1997. v113. pm9352883. PMID 9352883. Jump up ^ Spencer AU, Neaga A, West B, et al. ( September 2005 ). `` Pediatric short bowel syndrome : redefining predictors of success ''. Ann. Surg. 242 ( 3 ) : 403 -- 9 ; discussion 409 -- 12. doi : 10.1097 / 01. sla. 0000179647.24046. 03. PMC 1357748. PMID 16135926. ( mean follow - up time was 5.1 years ) Jump up ^ Strodtbeck, Frances ( June 2003 ). `` The pathophysiology of prolonged periods of no enteral nutrition or nothing by mouth ''. Newborn & Infant Nursing Reviews. Elsevier. 3 ( 2 ) : 47 -- 54. doi : 10.1016 / S1527 - 3369 ( 03 ) 00005 - 9. Retrieved 4 January 2016. Jump up ^ McGee DC, Gould MK ( March 2003 ). `` Preventing complications of central venous catheterization ''. N. Engl. J. Med. 348 ( 12 ) : 1123 -- 33. doi : 10.1056 / NEJMra011883. PMID 12646670. Jump up ^ Horattas MC, Trupiano J, Hopkins S, Pasini D, Martino C, Murty A ( February 2001 ). `` Changing concepts in long - term central venous access : catheter selection and cost savings ''. Am J Infect Control. 29 ( 1 ) : 32 -- 40. doi : 10.1067 / mic. 2001.111536. PMID 11172316. Jump up ^ G. Edward Morgan, Jr., Maged S. Mikhail, Michael J. MurrayClinical Anesthesiology, 4th Edition Jump up ^ McCowen, KC ; Friel, C ; Sternberg, J ; Chan, S ; Forse, RA ; Burke, PA ; Bistrian, BR ( 2000 ). `` Hypocaloric total parenteral nutrition : effectiveness in prevention of hyperglycemia and infectious complications -- a randomized clinical trial '' ( PDF ). Critical Care Medicine. 28 ( 11 ) : 3606 -- 11. doi : 10.1097 / 00003246 - 200011000 - 00007. PMID 11098961. ^ Jump up to : Landon, MB ; Gabbe, SG ; Mullen, JL ( 1986 ). `` Total parenteral nutrition during pregnancy ''. Clin Perinatol. 13 ( 1 ) : 57 -- 72. PMID 3082563. ^ Jump up to : Hayes, EM ; Cohen KR ; Pinard BE ; Lauletta J ; Ruggiero R. ( 2000 ). `` Standardized versusindividually customized parenteral nutrition solutions : a comparison ofserum electrolyte values '' ( PDF ). P&T. 25 ( 2 ) : 78 -- 80, 83, 87. Jump up ^ Didier ME, Fischer S, Maki DG ( 1998 ). `` Total nutrient admixtures appear safer than lipid emulsion alone as regards microbial contamination : growth properties of microbial pathogens at room temperature ''. JPEN J Parenter Enteral Nutr. 22 ( 5 ) : 291 -- 6. doi : 10.1177 / 0148607198022005291. PMID 9739032. Jump up ^ Rollins CJ, Elsberry VA, Pollack KA, Pollack PF, Udall JN ( 1990 ). `` Three - in - one parenteral nutrition : a safe and economical method of nutritional support for infants ''. JPEN J Parenter Enteral Nutr. 14 ( 3 ) : 290 -- 4. doi : 10.1177 / 0148607190014003290. PMID 2112645. Jump up ^ Intravenous Potassium Guidelines ( ADULTS ) From RNSH Pharmacy Department. Authorised by : Margaret Duguid. Last Modified : June 2006. Jump up ^ `` Cernevit TM - 12 ( multivitamins for infusion ) '' ( PDF ). Food and Drug Administration. 1999. Jump up ^ `` Cernevit '' ( PDF ). NPS MedicineWise. October 2014. Jump up ^ `` Addaven Konzentrat zur Herstellung einer Infusionslösung ''. Wissenschaftliche Verlagsgesellschaft Stuttgart. 2015 - 10 - 26. Jump up ^ Lecithin - An Emulsifier for Parenteral Use : TORVS Research Team Jump up ^ `` The use of Omegaven in treating parenteral nutrition - associated liver disease ''. J Perinatol. 31 Suppl 1 : S57 -- 60. 2011. doi : 10.1038 / jp. 2010.182. PMID 21448206. Jump up ^ Wilmore DW, Groff DB, Bishop HC, Dudrick SJ ( Apr 1969 ). `` Total parenteral nutrition in infants with catastrophic gastrointestinal anomalies ''. J Pediatr Surg. 4 ( 2 ) : 181 -- 9. doi : 10.1016 / 0022 - 3468 ( 69 ) 90389 - 3. PMID 4976039. Jump up ^ Dudrick SJ, Wilmore DW, Vars HM, Rhoads JE ( Jul 1968 ). `` Long - term total parenteral nutrition with growth, development, and positive nitrogen balance ''. Surgery. 64 ( 1 ) : 134 -- 42. External links American Society for Parenteral and Enteral Nutrition Oley Foundation for people who feed by tube or IV at home Nutrishare Specialists in long - term home parenteral nutrition across the USA Calculating Parenteral Feedings at California State University, San Bernardino PINNT UK based support group for Patients on Intravenous and Nasogastric Nutrition Therapy Nieman, Liesje ( January 2008 ). `` Parenteral Nutrition in the NICU '' ( PDF ). NutritionDimension.com. Retrieved 16 April 2013. Course ID code : PNN07 Kimaya web application to calculate TPN Intravenous therapy Infused substances Blood - based product Whole blood PF24 / Fresh frozen plasma ( Cryosupernatant + Cryoprecipitate ) Blood substitute Hemoglobin - based Volume expander Lactated Ringer 's Normal saline Sugar solution Buffers Lactated Ringer 's, Sodium bicarbonate Medications Intravenous immunoglobulin Parenteral nutrition Sugar Other Drug injection Access points Peripheral venous catheter Peripherally inserted central catheter ( Seldinger technique ) Central venous catheter Other equipment Infusion pump CVC SLC MLC PICC Implantable catheters Ports Thermodilution catheters Hemodialysis catheters Specific risks Air embolism Extravasation Retrieved from `` https://en.wikipedia.org/w/index.php?title=Parenteral_nutrition&oldid=822005385 '' Categories : Nutrition Intensive care medicine Intravenous fluids Hidden categories : All articles with unsourced statements Articles with unsourced statements from November 2013 Articles with unsourced statements from January 2016 Articles with unsourced statements from May 2013 Articles lacking reliable references from April 2014 All articles lacking reliable references Talk Contents About Wikipedia Čeština Deutsch Español Français Gaeilge Italiano עברית Nederlands 日本 語 Polski Português Русский Српски / srpski Srpskohrvatski / српскохрватски Edit links This page was last edited on 23 January 2018, at 21 : 50. 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Question: which condition would most likely require nutrition delivered through tpn
Answer: bowel obstruction