Vanessa J. Kumpf

Parenteral Nutrition-Associated Liver Disease in Adult and Pediatric Patients

There are essentially 3 types of hepatobiliary disorders associated with parenteral nutrition (PN) therapy: steatosis, cholestasis, and gallbladder sludge/stones. Reported prevalence rates of PN-associated liver disease (PNALD) vary greatly, and there are distinct differences between adult and pediatric patients. Various etiologic factors have been evaluated for significance in contributing to PNALD, including enteral feeding history, septic events, bacterial overgrowth, length of intestinal resection, and prematurity/low birth weight. Etiologic factors specifically related to the PN formulation or nutrient intake have also been evaluated, including excessive calorie intake, dextrose-to-lipid ratio, amino acid dose, taurine deficiency, IV fat emulsion (IVFE) dose, carnitine deficiency, choline deficiency, and continuous vs cyclic infusion. Minor increases in serum aminotransferase concentrations are relatively common in patients receiving PN therapy and generally require no intervention. The primary indicator of cholestasis is a serum conjugated bilirubin >2 mg/dL. When a patient receiving PN develops liver complications, it is necessary to rule out all treatable causes and minimize other risk factors. All potential hepatotoxic medications and herbal supplements should be eliminated. Modifications to the PN regimen that may be helpful include reduction of calories, reduction of IVFE dose to <1 g/kg/d, supplementation of taurine in the infant, and use of cyclic infusion. Initiation of even small amounts of enteral nutrition and use of ursodiol may be beneficial in stimulating bile flow. In the long-term PN patient with severe and progressive liver disease, intestinal or liver transplantation may be the only remaining treatment option.

Pharmacologic Management of Diarrhea in Patients With Short Bowel Syndrome

Diarrhea associated with short bowel syndrome (SBS) can have multiple etiologies, including accelerated intestinal transit, gastric acid hypersecretion, intestinal bacterial overgrowth, and malabsorption of fats and bile salts. As a result, patients may need multiple medications to effectively control fecal output. The armamentarium of antidiarrheal drugs includes antimotility agents, antisecretory drugs, antibiotics and probiotics, bile acid-binding resins, and pancreatic enzymes. An antidiarrheal regimen must be individualized for each patient and should be developed using a methodical, stepwise approach. Treatment should be initiated with a single first-line medication at the low end of its dosing range. Dosage and/or dosing frequency can then be slowly escalated to achieve maximal effect while minimizing adverse events. If diarrhea remains poorly controlled, additional agents can be incorporated sequentially. If modification of the regimen is required, a single medication should be altered or exchanged at a time. After each adjustment of the regimen, sufficient time should be permitted to fully assess response (≥3-5 days) before initiating additional changes. SBS-associated malabsorption is a major obstacle to optimization of an antidiarrheal regimen because drug absorption is impaired. Patients may benefit from high dosages and/or frequent dosing intervals, liquid preparations, or nonoral routes of drug delivery. Although the diarrhea associated with SBS can be debilitating, effective pharmaceutical management has the potential to substantially improve health outcomes and quality of life for these patients.

Invited Review: Parenteral Iron Supplementation

Indications for the use of parenteral iron are limited to conditions in which the oral supplementation of iron is not possible or fails. An overview of iron balance and iron requirements is presented to describe situations in which iron supplementation may be required. When parenteral iron supplementation is required, careful attention to proper dosing and administration is necessary to optimize efficacy and safety. The purpose of this article is to review the literature regarding the clinical use of parenteral iron therapy and provide guidelines on dosing and administration. Methods of iron dextran administration, including the IV and intramuscular injection of undiluted drug and total dose infusion, are compared. Complications associated with the use of parenteral iron are also be reviewed. Finally, the use of iron supplementation in patients receiving parenteral nutrition care explored.

Update on Parenteral Iron Therapy

The role of parenteral iron therapy has been expanding with the growing use of erythropoietin therapy. Much of the clinical experience regarding the use of IV iron therapy in combination with erythropoietin therapy is based on the hemodialysis patient, but the combination therapy has been used in other patient populations as well. In addition, parenteral iron may be indicated in patients receiving long-term parenteral nutrition and in other clinical situations of iron deficiency when the absorption of iron is impaired or tolerance limited. Once the indication for parenteral iron therapy is established, a selection of the most appropriate agent is required. There are currently 3 parenteral iron preparations available, including iron dextran, sodium ferric gluconate, and iron sucrose. Although all agents have been shown to be effective in correcting iron deficiency, there are differences that exist between them. Both sodium ferric gluconate and iron sucrose have been associated with lower rates of serious adverse reactions than iron dextran, although comparative studies are lacking. In patients with previously documented intolerance to iron dextran, sodium ferric gluconate and iron sucrose have been safely administered. In addition to the immediate and delayed reactions associated with the use of parenteral iron, the risk of iron overload and the potential increased risk of infection are of concern. This article will review the clinical experience of the 3 parenteral iron preparations, discuss safety issues, and provide guidelines on proper dosing and administration.

Complications After Bariatric Surgery: Survey Evaluating Impact on the Practice of Specialized Nutrition Support

BACKGROUND The rapid growth of obesity rates has affected the practice of specialized nutrition support in various ways. One area that deserves special consideration is the impact that bariatric surgery, in particular complications resulting from bariatric surgery, has made on nutrition support practice. A descriptive survey was designed to evaluate this impact and to assess the various approaches to nutrition assessment and interventions in the postoperative bariatric surgery patient. METHODS A web-based survey consisting of 17 questions was administered in April 2006 to American Society for Parenteral and Enteral Nutrition (A.S.P.E.N.) members with available e-mail addresses. Participants were queried about professional background, primary practice setting, and various issues related to their involvement in the care of bariatric surgery patients. RESULTS There were 467 responses returned out of 3400 surveys delivered (14% response rate). Sixty percent of responders estimated they were consulted to see 1-10 patients requiring specialized nutrition support over the previous year as a result of complications of bariatric surgery. The most common indications for specialized nutrition support in these patients were anastomotic leak/fistula (49%) and chronic nausea/vomiting (27%). When estimating calorie goals, 62% used an adjusted body weight, 15% used ideal body weight, and 14% used actual weight. When estimating protein goals, 56% used an adjusted body weight, 29% used ideal body weight, and 8% used actual weight. CONCLUSION These observations provide impetus for guideline development and highlight the priority for further research regarding the best practices to ensure that postoperative bariatric surgery patients receive safe and appropriate nutrition support.

Home Parenteral Nutrition Safe Transition From Hospital to Home

Parenteral nutrition (PN) is a complex therapy that may result in serious harm if not properly prescribed, prepared, and administered. The patient who is discharged home on PN for the first time poses significant safety challenges and requires coordination of care between several healthcare disciplines within and outside the hospital. Use of an experienced prescriber and multidisciplinary team to oversee the home PN therapy is an important measure to optimize safety. Referrals should be made to home health and home infusion agencies with qualified staff; however, this may at times be difficult to assess. A safe discharge also requires transition of care between inpatient clinicians caring for the patient and designated outpatient follow-up. Home PN and lab orders upon discharge should be clear and comprehensive. The use of a standardized home PN order format is an important measure to ensure accuracy of the order. Patient and/or caregiver education is another vital component to safely providing PN in the home setting and should ideally be initiated prior to discharge. This should include instructions to the patient regarding self-monitoring and when to call if problems develop. Specific criteria should be identified for the patients regarding when and who to contact for problems that develop after they are discharged home.

ASPEN-FELANPE Clinical Guidelines: Nutrition Support of Adult Patients With Enterocutaneous Fistula

Background: The management of patients with enterocutaneous fistula (ECF) requires an interdisciplinary approach and poses a significant challenge to physicians, wound/stoma care specialists, dietitians, pharmacists, and other nutrition clinicians. Guidelines for optimizing nutrition status in these patients are often vague, based on limited and dated clinical studies, and typically rely on individual institutional or clinician experience. Specific nutrient requirements, appropriate route of feeding, role of immune-enhancing formulas, and use of somatostatin analogues in the management of patients with ECF are not well defined. The purpose of this clinical guideline is to develop recommendations for the nutrition care of adult patients with ECF. Methods: A systematic review of the best available evidence to answer a series of questions regarding clinical management of adults with ECF was undertaken and evaluated using concepts adopted from the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) Working Group. An anonymous consensus process was used to develop the clinical guideline recommendations prior to peer review and approval by the ASPEN Board of Directors and by FELANPE. Questions: In adult patients with enterocutaneous fistula: (1) What factors best describe nutrition status? (2) What is the preferred route of nutrition therapy (oral diet, enteral nutrition, or parenteral nutrition)? (3) What protein and energy intake provide best clinical outcomes? (4) Is fistuloclysis associated with better outcomes than standard care? (5) Are immune-enhancing formulas associated with better outcomes than standard formulas? (6) Does the use of somatostatin or somatostatin analogue provide better outcomes than standard medical therapy? (7) When is home parenteral nutrition support indicated?

Significant Publications for Pharmacy Nutrition Support Practice in 2013

Purpose To assist the pharmacy clinician engaged in nutrition support in staying current with the most pertinent literature. Methods Several experienced board-certified clinical pharmacists in nutrition support compiled a list of publications published in 2013 that they considered to be important to their practice. The citation list was compiled into a Web-based survey whereby pharmacist members of the American Society for Parenteral and Enteral Nutrition (A.S.P.E.N.), GI-Liver-Nutrition Practice Research Network of the American College of Clinical Pharmacy, and the Pharmacy and Pharmacology Section of the Society of Critical Care Medicine were asked to rank each article according to level of importance in their practice. Results A total of 30 articles were identified by the author group. Thirty-six participants responded to the survey. The top-ranked papers by participants from the Web-based survey were reviewed by the authors. Due to its high level of importance, the parenteral nutrition safety consensus recommendations article, to be published in 2014 by A.S.P.E.N., was also reviewed. Conclusion It is recommended that the informed pharmacist, who is engaged in nutrition support therapy, be familiar with the majority of these publications.

Significant Published Articles for Pharmacy Nutrition Support Practice in 2014 and 2015

Purpose To assist the pharmacy clinician engaged in nutrition support in staying current with the most pertinent literature. Methods Several experienced board-certified clinical pharmacists engaged in nutrition support therapy compiled a list of articles published in 2014 and 2015 that they considered to be important to their practice. Only those articles available in print format were considered for potential inclusion. Articles available only in preprint electronic format were not evaluated. The citation list was compiled into a single spreadsheet where the author participants were asked to ascertain whether they considered the paper important to nutrition support pharmacy practice. A culled list of publications was then identified whereby the majority of author participants (at least 5 out of 8) considered the paper to be important. Results A total of 108 articles were identified; 36 of which were considered to be of high importance. An important guideline article published in early 2016, but not ranked, was also included. The top-ranked articles from the primary literature were reviewed. Conclusion It is recommended that the informed pharmacist, who is engaged in nutrition support therapy, be familiar with the majority of these articles.

Significant Published Articles for Pharmacy Nutrition Support Practice in 2016

Purpose: To assist the pharmacist engaged in nutrition support therapy in staying current with pertinent literature. Methods: Several clinical pharmacists engaged in nutrition support therapy compiled a list of articles published in 2016 considered important to their clinical practice. The citation list was compiled into a single spreadsheet where the author participants were asked to assess whether the paper was considered important to nutrition support pharmacy practice. A culled list of publications was then identified whereby the majority of author participants (at least 5 out of 8) considered the paper to be important. Guideline and consensus papers from professional organizations, important to practice but not scored, were also included. Results: A total of 103 articles were identified; 10 from the primary literature were voted by the group to be of high importance. An additional 11 organizational guidelines, position, recommendation, or consensus papers were also identified. The top-ranked articles from the primary literature were reviewed. Conclusion: It is recommended that pharmacists, engaged in nutrition support therapy, be familiar with the majority of these articles as it pertains to their practice.