No controlled trials were found that address the impact of conducting a review of medical records, physical examination, or survey/interview on the frequency or severity of perioperative pulmonary aspiration of gastric contents. One study included younger children (mean age, 3 yr), 2 included children with mean or median age of 5 yr, and the remaining studies reported median ages ranging from 7 to 11 yr. Five studies were conducted in surgical settings, and 4 were nonsurgical. Use of tobacco is one of the leading causes of preventable illness in the U.S.; smoking accounts for approximately 20% of deaths. Aspiration can occur during any type of anesthesia, as a result of . Practice guidelines are subject to revision as warranted by the evolution of medical knowledge, technology, and practice. Effects of preoperative carbohydrate loading on glucose metabolism and gastric contents in patients undergoing moderate surgery: A randomized, controlled trial. For findings to be accepted as significant, odds ratios must agree with combined test results whenever both types of data were assessed. Participants drinking carbohydrate-containing clear liquids had lower patient-rated hunger (supplemental figs. Aspiration of gastric contents is associated with increased perioperative morbidity and mortality [ 1-3 ], with highest risk associated with high volume, acidic, or particulate aspiration. The effect of a small drink. The task force reaffirms the 2017 recommendations for clear liquids until 2h preoperatively.1 Simple or complex carbohydratecontaining clear liquids appear to reduce patient hunger when compared with noncaloric clear liquids. Safe intake of an oral supplement containing carbohydrates and whey protein shortly before sedation to gastroscopy; a double blind, randomized trial. A single randomized controlled trial reported higher satisfaction in parents of children with a 1-h clear liquid fast compared with parents of children with a 2-h clear liquid fast99 (very low strength of evidence). 15 to 16, https://links.lww.com/ALN/C935) and thirst2342 compared with fasting patients (moderate strength of evidence). A summary of recommendations is found in appendix 1 (table 1). The guidelines may not apply to or may need to be modified for patients with coexisting diseases or conditions that can affect gastric emptying or fluid volume (e.g., pregnancy, obesity, diabetes, hiatal hernia, gastroesophageal reflux disease, ileus or bowel obstruction, emergency care, or enteral tube feeding) and patients in whom airway management might be difficult. Tests for heterogeneity of the independent studies were conducted to assure consistency among the study results. A randomized controlled study of preoperative oral carbohydrate loading. When warranted, the Task Force may add educational information or cautionary notes based on this information. Effects of 2-, 4- and 12-hour fasting intervals on preoperative gastric fluid pH and volume, and plasma glucose and lipid homeostasis in children. Insufficient Literature. Metabolic and inflammatory benefits of reducing preoperative fasting time in pediatric surgery. Table 7 summarizes the evidence for clinically important outcomes. There was inconclusive evidence concerning residual gastric volume in nonsurgical studies that included comparisons of protein-containing clear liquids compared with carbohydrate-containing clear liquids alone (supplemental tables 11 and 12, https://links.lww.com/ALN/C934). For these updated guidelines, systematically-reviewed studies used in the development of the previous update were combined with a systematic review of studies published subsequent to ASA approval in 2010. Bugsnet: An R package to facilitate the conduct and reporting of Bayesian network meta-analyses. The literature is insufficient to evaluate the effect of timing of the ingestion of breast milk and the perioperative incidence of pulmonary aspiration, gastric volume, pH, or emesis/reflux. The percent of consultants expecting no change associated with each linkage were as follows: preoperative assessment 95%; preoperative fasting of solids 75%; preoperative fasting of liquids 67%; preoperative fasting of breast milk 78%; gastrointestinal stimulants 95%; pharmacologic blockage of gastric secretion 91%; antacids 100%; antiemetics 98%, anticholinergics 100%, and multiple agents 98%. For these guidelines, the primary outcomes of interest are pulmonary aspiration and the frequency or severity of adverse consequences associated with aspiration (e.g., pneumonitis). Effects and safety of preoperative oral carbohydrates in radical distal gastrectomyA randomized clinical trial. The guidelines do not apply to patients who undergo procedures with no anesthesia or only local anesthesia when upper airway protective reflexes are not impaired and when no risk factors for pulmonary aspiration are apparent. How to perform a meta-analysis with R: A practical tutorial. Premedication with cimetidine and metoclopramide. Evidentiary information and recommendations regarding the administration of preoperative gastrointestinal stimulants and postoperative nausea and vomiting findings may be found in: Practice guidelines for postanesthetic care: An updated report by the American Society of Anesthesiologists Task Force on Postanesthetic Care. asa npo guidelines 2020 chewing tobacco asa npo guidelines 2020 chewing tobacco vo 9 Thng Su, 2022 vo 9 Thng Su, 2022 The anesthesiologist and patient representative task force members rated the importance of each outcome for decision-making on a scale of 1 to 9 (1 to 3, of limited importance; 4 to 6, important; 7 to 9, critical).8 The evidence synthesis focused on the outcomes rated important or critical. Received from the American Society of Anesthesiologists, Schaumburg, Illinois. Inferred findings are given a directional designation of beneficial (B), harmful (H), or equivocal (E). A comparison of rabeprazole, lansoprazole, and ranitidine for improving preoperative gastric fluid property in adults undergoing elective surgery. Category B: Membership Opinion. This document updates the Practice Guidelines for Preoperative Fasting and the Use of Pharmacologic Agents to Reduce the Risk of Pulmonary Aspiration: An Updated Report adopted by the ASA in 2010 and published in 2011.. Are you thirsty?Fasting times in elective outpatient pediatric patients. Survey responses from Task Forceappointed expert consultants are reported in summary form in the text, with a complete listing of consultant survey responses reported in appendix 2 (table 3). No aspiration after carbohydrate-containing clear or noncaloric clear liquids was reported in 17 randomized controlled trials.23,24,26,39,55,57,59,63,74,75,77,78,8084 (strength of evidence not rated due to lack of events). Clear liquids may be ingested for up to 2 h before procedures requiring general anesthesia, regional anesthesia, or procedural sedation and analgesia. Preoperative oral carbohydrate loading in laparoscopic gynecologic surgery: A randomized controlled trial. Clear fluids three hours before surgery do not affect the gastric fluid contents of children. For patients undergoing elective procedures, this update addresses: Carbohydrate-containing clear liquids (simple or complex), Clear liquid fasting duration (1h vs. 2h) for children. Unless otherwise specified, outcomes for the listed interventions refer to the occurrence of pulmonary aspiration complications associated with aspiration, gastric contents, or nausea/vomiting. 8,061. The consultants agree and the ASA members strongly agree that fasting from the intake of a light meal ( e.g ., toast and a clear liquid) of 6 or more hours before elective procedures requiring general anesthesia, regional anesthesia, or procedural sedation and analgesia should be maintained. Three (30%) studies enrolled patients rated with ASA Physical Status I or II, and 1 (10%) study included ASA Physical Status I to III (6 [60%] studies did not report ASA Physical Status). Fourth, opinions about the guideline recommendations were solicited from a random sample of active members of the ASA. Effect of preoperative oral carbohydrate administration on patients undergoing cesarean section with epidural anesthesia: A pilot study. We suggest not delaying elective procedures requiring general anesthesia, regional anesthesia, or procedural sedation in healthy adults who are chewing gum. They provide basic recommendations that are supported by a synthesis and analysis of the current literature, expert and practitioner opinion, open forum commentary, and clinical feasibility data. The ASA members disagree and the consultants strongly disagree that preoperative multiple agents should be routinely administered before elective procedures requiring general anesthesia, regional anesthesia, or procedural sedation and analgesia in patients with no apparent risk for pulmonary aspiration. In addition, both the consultants and ASA members strongly agree that verification of their compliance with the fasting requirements should be assessed at the time of the procedure. Small study effects and the potential for publication bias were evaluated using funnel plots and regression-based tests.12 Analyses were conducted in R (R Foundation for Statistical Computing, Vienna, Austria).1315 (See the methods supplement for further details, https://links.lww.com/ALN/C962.). The effect of pre-operative intake of oral water and ranitidine on gastric fluid volume and pH in children undergoing elective surgery. A difference was not detected in gastric pH92,9497 (low strength of evidence, supplemental table 16, https://links.lww.com/ALN/C934). Systematic Review Protocol, https://links.lww.com/ALN/C930, PRISMA flowchart, https://links.lww.com/ALN/C931, Search strategy, https://links.lww.com/ALN/C932, Excluded studies bibliography with reasoning, https://links.lww.com/ALN/C933, Supplemental tables, https://links.lww.com/ALN/C934, Supplemental figures, https://links.lww.com/ALN/C935, Methods Supplement, https://links.lww.com/ALN/C962. Lansoprazole reduces preoperative gastric fluid acidity and volume in children. Gastric emptying of clear liquid drinks assessed with gastric ultrasonography: A blinded, randomized pilot study. Ultrasound-guided assessment of gastric residual volume in patients receiving three types of clear fluids: A randomised blinded study. Site Management asa npo guidelines 2020 chewing tobacco Download PDF 2 MB. No aspiration was reported after either the fasting or carbohydrate-containing clear liquids groups in 31 randomized controlled trials,2326,29,30,32,33,36,37,39,4244,4764 2 nonrandomized trials,65,66 and 1 case-control study67 (strength of evidence not rated due to lack of events). Effect on the risk factors of acid aspiration. Preoperative oral carbohydrate treatment attenuates endogenous glucose release 3 days after surgery. Ultrasound assessment of gastric volume in children after drinking carbohydrate-containing fluids. Patients drinking protein-containing clear liquids until 2h before their procedures experienced less hunger compared to fasting (table 4) and less hunger and thirst compared to drinking other clear liquids (table 5). **, Strongly Agree: Median score of 5 (at least 50% of the responses are 5), Agree: Median score of 4 (at least 50% of the responses are 4 or 4 and 5), Equivocal: Median score of 3 (at least 50% of the responses are 3, or no other response category or combination of similar categories contain at least 50% of the responses), Disagree: Median score of 2 (at least 50% of responses are 2 or 1 and 2), Strongly Disagree: Median score of 1 (at least 50% of responses are 1). Clinical practice includes, but is not limited to, withholding of liquids and solids for specified time periods before surgery and prescribing pharmacologic agents to reduce gastric volume and acidity. The Task Force notes that intake of fried or fatty foods or meat may prolong gastric emptying time. Assessment of gastric emptying of maltodextrin, coffee with milk and orange juice during labour at term using point of care ultrasound: A non-inferiority randomised clinical trial. Literature citations are obtained from healthcare databases, direct internet searches, Task Force members, liaisons with other organizations, and from manual searches of references located in reviewed articles. Inconsistent results were reported for residual gastric volume. Supplemental tables 13 and 14 (https://links.lww.com/ALN/C934) detail the strength-of-evidence ratings. Search terms consisted of the interventions indicated above guided by the appropriate inclusion/exclusion criteria as stated in the Focus section of these updated guidelines. Practice guidelines are subject to revision as warranted by the evolution of medical knowledge, technology, and practice. Studies examining carbohydrate- and protein-containing clear liquids published in January 2000 or later were eligible for inclusion. Anesthesiology 2011 ; 114: 495-511. Reaction score. Meta-analyses from other sources are reviewed but not included as evidence in this document. Comparison of the effects of famotidine and ranitidine on gastric secretion in patients undergoing elective surgery. For the previous update, consensus was obtained from multiple sources, including: (1) survey opinion from consultants who were selected based on their knowledge or expertise in preoperative fasting and prevention of pulmonary aspiration, (2) survey opinions solicited from active members of the ASA membership, (3) testimony from attendees of a publicly-held open forum for the original guidelines held at a national anesthesia meeting, (4) Internet commentary, and (5) Task Force opinion and interpretation. A comparison of lansoprazole, omeprazole, and ranitidine for reducing preoperative gastric secretion in adult patients undergoing elective surgery. Conflicts were resolved by consensus. Patient satisfaction31,46 was reported in only two trials, and a difference could not be assessed (low strength of evidence). Tobacco's calories (if there's any) is insignificant to interrupt weight loss. Category A: Expert Opinion. Finally, there is a need for education of patients, their caregivers, and healthcare providers regarding avoidance of preoperative fasting beyond the recommended durations and the detrimental effects of prolonged fasting. For these guidelines, preoperative fasting is defined as a prescribed period of time before a procedure when patients are not allowed the oral intake of liquids or solids. Emergency Laparotomy Guidelines for Perioperative Care in Cytoreductive Surgery (CRS) with or without hyperthermic IntraPEritoneal chemotherapy (HIPEC): Enhanced recovery after surgery (ERAS) Society Recommendations Part I: Preoperative and intraoperative management Cytoreductive Healthy adult patients should be encouraged to drink up to 400ml of carbohydrate-containing clear liquids until 2h before an elective procedure to minimize potential harms of prolonged fasting, including hunger and thirst. Going from evidence to recommendationDeterminants of a recommendations direction and strength. These practice guidelines are a modular update of the Practice guidelines for preoperative fasting and the use of pharmacologic agents to reduce the risk of pulmonary aspiration: Application to healthy patients undergoing elective procedures. The guidance focuses on topics not addressed in the previous guideline: ingestion of carbohydrate-containing clear liquids with or without protein, chewing gum, and pediatric fasting duration. A randomized placebo controlled trial of preoperative carbohydrate drinks and early postoperative nutritional supplement drinks in colorectal surgery. Category A evidence represents results obtained from randomized controlled trials (RCTs) and Category B evidence represents observational results obtained from nonrandomized study designs or RCTs without pertinent comparison groups. Sugarless gum chewing before surgery does not increase gastric fluid volume or acidity. Preoperative fasting in children: An audit and its implications in a tertiary care hospital. Submitted for publication May 18, 2022. Aspiration of gastric contents was not evident in the studies. The history, examination, and interview should include assessment of ASA physical status, age, sex, type of surgery, and potential for difficult airway management as well as consideration of gastroesophageal reflux disease,* dysphagia symptoms, other gastrointestinal motility and metabolic disorders (e.g., diabetes mellitus) that may increase the risk of regurgitation and pulmonary aspiration. Preoperative oral feeding reduces stress response after laparoscopic cholecystectomy. Acid-aspiration prophylaxis by use of preoperative oral administration of cimetidine. Additionally, the cigarette tax rate is increased effective July 1, 2020. Two hundred ninety-eight new citations were identified and reviewed, with 42 new studies meeting the above stated criteria. Previous ASA guidelines recommend that clear liquids such as water, black coffee, black tea, and juice without pulp are safe to drink until 2h before general anesthesia, regional anesthesia, or procedural sedation for elective procedures.1. These studies were combined with 133 pre-2010 articles used in the previous update, resulting in a total of 175 articles found acceptable as evidence for these guidelines. Antiemetics may be preoperatively administered to patients at increased risk of postoperative nausea and vomiting. Guidelines to the practice of anesthesia Revised edition 2022. The incidence and outcome of perioperative pulmonary aspiration in a university hospital: A 4-year retrospective analysis. The body of evidence was first described according to study characteristics and treatment arms. Randomized clinical trial to compare the effects of preoperative oral carbohydrate. Approved by the ASA House of Delegates on October 26, 2016. michael emerson first wife; bike steering feels heavy; asa npo guidelines 2020 chewing tobacco Attenuation of gastric effects of famotidine by preoperative administration of intravenous fluids. Chewing gum in the preoperative fasting period: An analysis of de-identified incidents reported to webairs. Therefore, there is insufficient evidence to recommend protein-containing over other carbohydrate-containing or noncaloric clear liquids. Individuals can improve their health and reduce their risk of contracting these and other diseases by quitting chewing tobacco. Prophylactic single-dose oral antacid therapy in the preoperative periodcomparison of cimetidine and Maalox. Prolonged fasting has well described adverse consequences. Ask patients about tobacco use at every office visit. Impact of clear fluid fasting on pulmonary aspiration in children undergoing general anesthesia: Results of the German prospective multicenter observational (NiKs) study. American Society of Anesthesiologists Committee. Eight hours fasting from enteral feeds is preferred. The authors declare no competing interests. Reduction of the risk of acid pulmonary aspiration in anaesthetized patients after cimetidine premedication. Hypoglycaemia in children before operation: its incidence and prevention. Evidence levels refer specifically to the strength and quality of the summarized study findings (i.e., statistical findings, type of data, and the number of studies reporting/replicating the findings). In adults, evidence comparing fasting with chewing gum was inconsistent with respect to patient-rated hunger92 or thirst92,93 (very low strength of evidence). The PRISMA flow diagram (https://links.lww.com/ALN/C931) and Literature Search Strategy (https://links.lww.com/ALN/C932) are available as Supplemental Digital Content. ROBINS-I: A tool for assessing risk of bias in non-randomised studies of interventions. Procedures in which upper airway protective reflexes may be impaired. Copyright 2023, the American Society of Anesthesiologists. A randomized trial of preoperative oral carbohydrates in abdominal surgery. Pre-operative oral carbohydrate treatment before coronary artery bypass surgery. The impact and safety of preoperative oral or intravenous carbohydrate administration. When available, Category A evidence is given precedence over Category B evidence for any particular outcome. The strength may be upgraded if the effect is large, if a dose-response is present, or if unaccounted residual confounding would likely have increased the effect.18 For the comparisons of simple and complex carbohydratecontaining clear liquids (residual gastric volume and hunger, and thirst), the strength of evidence was assessed with the Confidence in Network Meta-Analysis tool.19 This tool includes considerations specific to network meta-analyses. For each key question, the evidence synthesis and summary tables of benefits and harms were presented to the task force. An updated report by the American Society of Anesthesiologists task force on preoperative fasting and the use of pharmacologic agents to reduce the risk of pulmonary aspiration. GRADE guidelines: 15. An Updated Report by the American Society of Anesthesiologists Task Force on Preoperative Fasting and the Use of Pharmacologic Agents to Reduce the Risk of Pulmonary Aspiration, A Tool to Screen Patients for Obstructive Sleep Apnea, ACE (Anesthesiology Continuing Education), https://doi.org/10.1097/ALN.0000000000001452, 2023 American Society of Anesthesiologists Practice Guidelines for Preoperative Fasting: Carbohydrate-containing Clear Liquids with or without Protein, Chewing Gum, and Pediatric Fasting DurationA Modular Update of the 2017 American Society of Anesthesiologists Practice Guidelines for Preoperative Fasting, 2023 American Society of Anesthesiologists Practice Guidelines for Monitoring and Antagonism of Neuromuscular Blockade: A Report by the American Society of Anesthesiologists Task Force on Neuromuscular Blockade, 2022 American Society of Anesthesiologists Practice Guidelines for Management of the Difficult Airway, Psychiatric Disorders and Psychopharmacologic Treatment as Risk Factors in Elective Fast-track Total Hip and Knee Arthroplasty, Anomalous Drainage of Inferior Vena Cava into the Left Atrium, Ultrasound-guided Visualization of Subglottic Secretions in Intubated Patients, Lung Pulse with Pneumothorax: Examine the Thoracic Artery and Veins, Copyright 2023 American Society of Anesthesiologists.