Guidelines for the Provision and Assessment of Nutrition Support Therapy in the Adult Critically Ill Patient

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Abstract

PRELIMINARY REMARKS (INTENT OF GUIDELINES) A.S.P.E.N. and SCCM are both nonprofit organizations composed of multidisciplinary healthcare professionals. The mission of A.S.P.E.N. is to improve patient care by advancing the science and practice of clinical nutrition and metabolism. The mission of SCCM is to secure the highest quality care for all critically ill and injured patients. Guideline Limitations: These A.S.P.E.N.−SCCM Clinical Guidelines are based on general conclusions of health professionals who, in developing such guidelines, have balanced potential benefits to be derived from a particular mode of medical therapy against certain risks inherent with such therapy. However, practice guidelines are not intended as absolute requirements. The use of these practice guidelines does not in any way project or guarantee any specific benefit in outcome or survival. The judgment of the healthcare professional based on individual circumstances of the patient must always take precedence over the recommendations in these guidelines. The guidelines offer basic recommendations that are supported by review and analysis of the current literature, other national and international guidelines, and a blend of expert opinion and clinical practicality. The population of critically ill patients in an intensive care unit (ICU) is not homogeneous. Many of the studies on which the guidelines are based are limited by sample size, patient heterogeneity, variability in disease severity, lack of baseline nutritional status, and insufficient statistical power for analysis. Periodic Guideline Review and Update: This particular report is an update and expansion of guidelines published by A.S.P.E.N. and SCCM in 2009 (1). Governing bodies of both A.S.P.E.N. and SCCM have mandated that these guidelines be updated every three to five years. The database of randomized controlled trials (RCTs) that served as the platform for the analysis of the literature was assembled in a joint “harmonization process” with the Canadian Clinical Guidelines group. Once completed, each group operated separately in their interpretation of the studies and derivation of guideline recommendations (2). The current A.S.P.E.N. and SCCM guidelines included in this paper were derived from data obtained via literature searches by the authors through December 31, 2013. Although the committee was aware of landmark studies published after this date, these data were not included in this manuscript. The process by which the literature was evaluated necessitated a common end date for the search review. Adding a last-minute landmark trial would have introduced bias unless a formalized literature search was re-conducted for all sections of the manuscript. Target Patient Population for Guideline: The target of these guidelines is intended to be the adult (≥ 18 years) critically ill patient expected to require a length of stay (LOS) greater than 2 or 3 days in a medical ICU (MICU) or surgical ICU (SICU). The current guidelines were expanded to include a number of additional subsets of patients who met the above criteria, but were not included in the previous 2009 guidelines. Specific patient populations addressed by these expanded and updated guidelines include organ failure (pulmonary, renal, and liver), acute pancreatitis, surgical subsets (trauma, traumatic brain injury [TBI], open abdomen [OA], and burns), sepsis, postoperative major surgery, chronic critically ill, and critically ill obese. These guidelines are directed toward generalized patient populations but, like any other management strategy in the ICU, nutrition therapy should be tailored to the individual patient. Target Audience: The intended use of these guidelines is for all healthcare providers involved in nutrition therapy of the critically ill, primarily physicians, nurses, dietitians, and pharmacists. Methodology: The authors compiled clinical questions reflecting key management issues in nutrition therapy. A committee of multidisciplinary experts in clinical nutrition composed of physicians, nurses, pharmacists, and dietitians was jointly convened by the two societies. Literature searches were then performed using key words (critically ill, critical care, intensive care, nutrition, enteral, parenteral, tube feeding, and those related to assigned topics such as pancreatitis, sepsis, etc.) to evaluate the quality of evidence supporting a response to those questions, which were then used to derive a subsequent treatment recommendation. The literature search included MEDLINE, PubMed, Cochrane Database of Systemic Reviews, the National Guidelines Clearing House and an Internet search using the Google search engine for scholarly articles through an end date of December 31, 2013 (including ePub publications). While preference was given to RCTs, other forms of resource material were used to support the response, including nonrandomized cohort trials, prospective observational studies, and retrospective case series. Use of publications was limited to full-text articles available in English on adult humans. For all included RCTs, two readers completed data abstraction forms (DAFs) examining the data and assessing the quality of the research methodology to produce a shared evaluation achieved by consensus for each study (example of DAF provided in the supplemental data, Supplemental Digital Content 1, https://links.lww.com/CCM/B571). DAFs were constructed only for RCTs. When the strongest available evidence was a published meta-analysis, the studies from the meta-analysis were used to determine the quality of the evidence and assessed by two evidence assessors. The data from included trials were entered into Review Manager 5.2 software to create forest plots aggregating the effect size for each intervention and outcome (3). The key forest plots supporting the recommendation are included throughout the text and in the supplement data (Supplemental Digital Content 1, https://links.lww.com/CCM/B571). No new forest plots were created when a meta-analysis was evaluated. Since release of the 2009 A.S.P.E.N. and SCCM Clinical Guidelines, the concepts of the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) Working Group have A of the methodology published The data from the Review Manager analysis was to software the of evidence for a given intervention and outcome was evaluated for created each that was then by a The are provided in the supplement data (Supplemental Digital Content 1, https://links.lww.com/CCM/B571). to the number of observational studies were critically but not to the However, in the observational studies were the only available evidence in a their quality of evidence was using When or observational study was available to a consensus of the group on the clinical practice was and the recommendation was on expert of recommendation for clinical practice was based on both the available evidence and the risks and benefits to patients. While each recommendation and provided the supporting a by the group and every committee was for their with the recommendation. of consensus was of authors with a particular recommendation. recommendation not this of with a consensus of other recommendations a of of or with all A.S.P.E.N. and SCCM clinical guidelines, this was to review by clinical experts from all the practice that would use the guidelines, both and to the A of the guidelines is in the supplement data (Supplemental Digital Content 1, https://links.lww.com/CCM/B571). 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The record

Venue

Critical Care Medicine

Topic

Clinical Nutrition and Gastroenterology

Field

Nursing

Canadian institutions

—

Funders

—

Keywords

MedicineCritically illIntensive care medicineCritical illness

Has abstract in OpenAlex

yes

API

/api/v1/works/W2099246031