Highlights & Basics
- Hyperglycemia and hypoglycemia are associated with higher mortality, independent of known history of diabetes. Patients with newly discovered hyperglycemia have significantly higher in-hospital mortality than patients with a known history of diabetes or normoglycemic patients.
- In both critical and noncritical care settings, glycemic control should be individualized to the patient's status and to the resources available. Management is similar in medical and surgical patients, but hypoglycemia is more frequent in medical patients, and outcomes are worse in this group; therefore, avoidance of hypoglycemia is essential.
- Effective management of hyperglycemia is associated with a decreased length of intensive care unit and hospital stay. An intravenous insulin infusion, along with an infusion of dextrose, is the preferred method of delivering insulin in critically ill patients. Tight glycemic control in the normal range of 80-110 mg/dL (4.4 to 6.1 mmol/L) may not be necessary, however, and may in fact be harmful.
- A basal-bolus insulin regimen or a basal insulin regimen may be used in patients admitted to the hospital who are not critically ill. Sliding scale insulin alone should not be used in these patients.
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Citations
American Diabetes Association. Standards of care in diabetes - 2024. Diabetes Care. 2024 Jan;47(suppl 1):S1-321.[Full Text]
Moghissi ES, Korytkowski MT, DiNardo M, et al. American Association of Clinical Endocrinologists and American Diabetes Association consensus statement on inpatient glycemic control. Endocr Pract 2009 May-Jun;15(4):353-69.[Abstract]
Pasquel FJ, Lansang MC, Dhatariya K, et al. Management of diabetes and hyperglycaemia in the hospital. Lancet Diabetes Endocrinol. 2021 Mar;9(3):174-88.[Abstract][Full Text]
Finfer S, Chittock DR, Su SY, et al; NICE-SUGAR Study Investigators. Intensive versus conventional glucose control in critically ill patients. N Engl J Med. 2009 Mar 26;360(13):1283-97.[Abstract][Full Text]
Umpierrez G, Smiley D, Zisman A, et al. Randomized study of basal-bolus insulin therapy in the inpatient management of patients with type 2 diabetes (RABBIT 2 trial). Diabetes Care. 2007 Sep;30(9):2181-6.[Abstract][Full Text]
1. American Diabetes Association. Standards of care in diabetes - 2024. Diabetes Care. 2024 Jan;47(suppl 1):S1-321.[Full Text]
2. Diabetes Canada (Canadian Diabetes Association). Clinical practice guidelines for the prevention and management of diabetes in Canada. 2018 [internet publication].[Full Text]
3. Moghissi ES, Korytkowski MT, DiNardo M, et al. American Association of Clinical Endocrinologists and American Diabetes Association consensus statement on inpatient glycemic control. Endocr Pract 2009 May-Jun;15(4):353-69.[Abstract]
4. Korytkowski MT, Muniyappa R, Antinori-Lent K, et al. Management of hyperglycemia in hospitalized adult patients in non-critical care settings: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. 2022 Jul 14;107(8):2101-28.[Abstract][Full Text]
5. Umpierrez GE, Isaacs SD, Bazargan N, et al. Hyperglycemia: an independent marker of in-hospital mortality in patients with undiagnosed diabetes. J Clin Endocrinol Metab. 2002 Mar;87(3):978-82.[Abstract][Full Text]
6. Levetan CS, Magee MF. Hospital management of diabetes. Endocrinol Metab Clin North Am. 2000 Dec;29(4):745-70.[Abstract]
7. Finney SJ, Zekveld C, Elia A, et al. Glucose control and mortality in critically ill patients. JAMA. 2003 Oct 15;290(15):2041-7.[Abstract][Full Text]
8. Fonseca V. Newly diagnosed diabetes/hyperglycemia in hospitals: what should we do? Endocr Pract. 2006 Jul-Aug;12 Suppl 3:108-11.[Abstract]
9. Inzucchi SE. Clinical practice: management of hyperglycemia in the hospital setting. N Engl J Med. 2006 Nov 2;355(18):1903-11.[Abstract]
10. Pasquel FJ, Smiley D, Spiegelman R, et al. Hyperglycemia is associated with increased hospital complications and mortality during parenteral nutrition. Hosp Pract (Minneap). 2011 Apr;39(2):81-8.[Abstract]
11. ACE/ADA Task Force on Inpatient Diabetes. American College of Endocrinology and American Diabetes Association consensus statement on inpatient diabetes and glycemic control. Endocr Pract. 2006 Jul-Aug;12(4):458-68.[Abstract]
12. Barker HL, Morrison D, Llano A, et al. Practical guide to glucocorticoid induced hyperglycaemia and diabetes. Diabetes Ther. 2023 May;14(5):937-45.[Abstract][Full Text]
13. Kornum JB, Thomsen RW, Riis A, et al. Diabetes, glycemic control, and risk of hospitalization with pneumonia: a population-based case-control study. Diabetes Care. 2008 Aug;31(8):1541-5.[Abstract][Full Text]
14. Kwon S, Hermayer KL. Glucocorticoid-induced hyperglycemia. Am J Med Sci. 2013 Apr;345(4):274-7.[Abstract]
15. Farrokhi F, Klindukhova O, Chandra P, et al. Risk factors for inpatient hypoglycemia during subcutaneous insulin therapy in non-critically ill patients with type 2 diabetes. J Diabetes Sci Technol. 2012 Sep 1;6(5):1022-9.[Abstract][Full Text]
16. Dabelea D, Rewers A, Stafford JM, et al; SEARCH for Diabetes in Youth Study Group. Trends in the prevalence of ketoacidosis at diabetes diagnosis: the SEARCH for Diabetes in Youth study. Pediatrics. 2014 Apr;133(4):e938-45.[Abstract][Full Text]
17. Jones AG, Hattersley AT. The clinical utility of C-peptide measurement in the care of patients with diabetes. Diabet Med. 2013 Jul;30(7):803-17.[Abstract][Full Text]
18. Lampasona V, Petrone A, Tiberti C, et al; Non Insulin Requiring Autoimmune Diabetes (NIRAD) Study Group. Zinc transporter 8 antibodies complement GAD and IA-2 antibodies in the identification and characterization of adult-onset autoimmune diabetes: Non Insulin Requiring Autoimmune Diabetes (NIRAD) 4. Diabetes Care. 2010 Jan;33(1):104-8.[Abstract][Full Text]
19. Sacks DB, Arnold M, Bakris GL, et al. Guidelines and recommendations for laboratory analysis in the diagnosis and management of diabetes mellitus. Diabetes Care. 2023 Oct 1;46(10):e151-e199.[Abstract][Full Text]
20. Pasquel FJ, Lansang MC, Dhatariya K, et al. Management of diabetes and hyperglycaemia in the hospital. Lancet Diabetes Endocrinol. 2021 Mar;9(3):174-88.[Abstract][Full Text]
21. van den Berghe G, Wouters P, Weekers F, et al. Intensive insulin therapy in critically ill patients. N Engl J Med. 2001 Nov 8;345(19):1359-67.[Abstract][Full Text]
22. Marik PE, Preiser JC. Toward understanding tight glycemic control in the ICU: a systematic review and metaanalysis. Chest. 2010 Mar;137(3):544-51.[Abstract]
23. Finfer S, Chittock DR, Su SY, et al; NICE-SUGAR Study Investigators. Intensive versus conventional glucose control in critically ill patients. N Engl J Med. 2009 Mar 26;360(13):1283-97.[Abstract][Full Text]
24. Umpierrez G, Smiley D, Zisman A, et al. Randomized study of basal-bolus insulin therapy in the inpatient management of patients with type 2 diabetes (RABBIT 2 trial). Diabetes Care. 2007 Sep;30(9):2181-6.[Abstract][Full Text]
25. Umpierrez GE, Smiley D, Jacobs S, et al. Randomized study of basal-bolus insulin therapy in the inpatient management of patients with type 2 diabetes undergoing general surgery (RABBIT 2 surgery). Diabetes Care. 2011 Feb;34(2):256-61.[Abstract][Full Text]
26. Pasquel FJ, Lansang MC, Khowaja A, et al. A randomized controlled trial comparing glargine U300 and glargine U100 for the inpatient management of medicine and surgery patients with type 2 diabetes: Glargine U300 hospital trial. Diabetes Care. 2020 Jun;43(6):1242-8.[Abstract][Full Text]
27. Suzuki J, Yamakawa T, Oba M, et al. Efficacy and safety of insulin degludec U100 and insulin glargine U100 in combination with meal-time bolus insulin in hospitalized patients with type 2 diabetes: an open-label, randomized controlled study. Endocr J. 2019 Nov 28;66(11):971-82.[Abstract][Full Text]
28. Umpierrez GE, Smiley D, Hermayer K, et al. Randomized study comparing a basal-bolus with a basal plus correction insulin regimen for the hospital management of medical and surgical patients with type 2 diabetes: Basal Plus trial. Diabetes Care. 2013 Aug;36(8):2169-74.[Abstract][Full Text]
29. Vellanki P, Bean R, Oyedokun FA, et al. Randomized controlled trial of insulin supplementation for correction of bedtime hyperglycemia in hospitalized patients with type 2 diabetes. Diabetes Care. 2015 Apr;38(4):568-74.[Abstract][Full Text]
30. Svensson AM, McGuire DK, Abrahamsson P, et al. Association between hyper- and hypoglycemia and 2 year all-cause mortality risk in diabetic patients with acute coronary events. Eur Heart J. 2005 Jul;26(13):1255-61.[Abstract][Full Text]
31. Dumont C, Bourguignon C. Effect of a computerized insulin dose calculator on the process of glycemic control. Am J Crit Care. 2012 Mar;21(2):106-15.[Abstract]
32. Steil GM, Langer M, Jaeger K, et al. Value of continuous glucose monitoring for minimizing severe hypoglycemia during tight glycemic control. Pediatr Crit Care Med. 2011 Nov;12(6):643-8.[Abstract][Full Text]
33. Klonoff DC. Intensive insulin therapy in critically ill hospitalized patients: making it safe and effective. J Diabetes Sci Technol. 2011 May 1;5(3):755-67.[Abstract][Full Text]
34. Goldberg PA, Siegel MD, Sherwin RS, et al. Implementation of a safe and effective insulin infusion protocol in a medical intensive care unit. Diabetes Care. 2004 Feb;27(2):461-7.[Abstract][Full Text]
35. Adams G, Hunter J, Langley J, et al. Is nurse-managed blood glucose control in critical care as safe and effective as the traditional sliding scale method? Intensive Crit Care Nurs. 2009 Dec;25(6):294-305.[Abstract]
36. American Society of Anesthesiologists. American Society of Anesthesiologists consensus-based guidance on preoperative management of patients (adults and children) on glucagon-like peptide-1 (GLP-1) receptor agonists. 2023 [internet publication].[Full Text]
37. Bloomgarden Z. Should glucagon-like peptide-1 receptor agonist treatment be withheld in preoperative management? J Diabetes. 2023 Sep;15(9):712-3.[Abstract][Full Text]
38. Thiruvenkatarajan V, Meyer EJ, Nanjappa N, et al. Perioperative diabetic ketoacidosis associated with sodium-glucose co-transporter-2 inhibitors: a systematic review. Br J Anaesth. 2019 Jul;123(1):27-36.[Abstract][Full Text]
39. Singh LG, Ntelis S, Siddiqui T, et al. Association of continued use of SGLT2 inhibitors from the ambulatory to inpatient setting with hospital outcomes in patients with diabetes: a nationwide cohort study. Diabetes Care. 5 Dec 2023 [Epub ahead of print].[Abstract]
40. Pasquel FJ, Gianchandani R, Rubin DJ, et al. Efficacy of sitagliptin for the hospital management of general medicine and surgery patients with type 2 diabetes (Sita-Hospital): a multicentre, prospective, open-label, non-inferiority randomised trial. Lancet Diabetes Endocrinol. 2017 Feb;5(2):125-33.[Abstract]
41. Garg R, Schuman B, Hurwitz S, et al. Safety and efficacy of saxagliptin for glycemic control in non-critically ill hospitalized patients. BMJ Open Diabetes Res Care. 2017 Mar 29;5(1):e000394.[Abstract][Full Text]
42. Vellanki P, Rasouli N, Baldwin D, et al. Glycaemic efficacy and safety of linagliptin compared to a basal-bolus insulin regimen in patients with type 2 diabetes undergoing non-cardiac surgery: a multicentre randomized clinical trial. Diabetes Obes Metab. 2019 Apr;21(4):837-43.[Abstract]
43. Joint British Diabetes Societies for Inpatient Care. The hospital management of hypoglycaemia in adults with diabetes mellitus. Jan 2023 [internet publication].[Full Text]
44. Agus MS, Steil GM, Wypij D, et al; SPECS Study Investigators. Tight glycemic control versus standard care after pediatric cardiac surgery. N Engl J Med. 2012 Sep 27;367(13):1208-19.[Abstract][Full Text]
45. Agus MS, Wypij D, Hirshberg EL, et al; HALF-PINT Study Investigators and the PALISI Network. Tight glycemic control in critically ill children. N Engl J Med. 2017 Feb 23;376(8):729-41.[Abstract][Full Text]
46. Bielen I, Sruk A, Zalac D. Specificity of hyperglycemia treatment in acute stroke patients. Acta Med Croatica. 2008 Jul;62(3):273-80.[Abstract]
47. Ooi YC, Dagi TF, Maltenfort M, et al. Tight glycemic control reduces infection and improves neurological outcome in critically ill neurosurgical and neurological patients. Neurosurgery. 2012 Sep;71(3):692-702.[Abstract]
48. Rickels MR, Ruedy KJ, Foster NC, et al; T1D Exchange Intranasal Glucagon Investigators. Intranasal glucagon for treatment of insulin-induced hypoglycemia in adults with type 1 diabetes: a randomized crossover noninferiority study. Diabetes Care. 2016 Feb;39(2):264-70.[Abstract][Full Text]
49. Christiansen MP, Cummins MJ, Prestrelski SJ, et al. A phase 3 comparison of a novel liquid glucagon autoinjector to glucagon emergency kit for the symptomatic relief of severe hypoglycemia. Paper presented at: American Diabetes Association 78th Scientific Sessions. 22-26 Jun 2018. Orlando, Florida, US. Oral presentations: clinical diabetes/therapeutics. Diabetes. 2018 Jul; 67(Supplement 1):304-OR.[Full Text]
50. Singh LG, Satyarengga M, Marcano I, et al. Reducing inpatient hypoglycemia in the general wards using real-time continuous glucose monitoring: the glucose telemetry system, a randomized clinical trial. Diabetes Care. 2020 Nov;43(11):2736-43.[Abstract][Full Text]
51. Perez-Guzman MC, Shang T, Zhang JY, et al. Continuous glucose monitoring in the hospital. Endocrinol Metab (Seoul). 2021 Apr;36(2):240-55.[Abstract][Full Text]
52. Spanakis EK, Urrutia A, Galindo RJ, et al. Continuous glucose monitoring-guided insulin administration in hospitalized patients with diabetes: a randomized clinical trial. Diabetes Care. 2022 Oct 1;45(10):2369-75.[Abstract][Full Text]
53. Finn E, Schlichting L, Grau L, et al. Real-world accuracy of CGM in inpatient critical and noncritical care settings at a safety-net hospital. Diabetes Care. 2023 Oct 1;46(10):1825-30.[Abstract][Full Text]
54. Voglová Hagerf B, Protus M, Nemetova L, et al. Accuracy and feasibility of real-time continuous glucose monitoring in critically ill patients after abdominal surgery and solid organ transplantation. Diabetes Care. 27 Feb 2024 [Epub ahead of print].[Abstract]
55. McCall AL, Lieb DC, Gianchandani R, et al. Management of individuals with diabetes at high risk for hypoglycemia: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. 2023 Mar;108(3):529-62.[Abstract][Full Text]
56. Pfeifer KJ, Selzer A, Mendez CE, et al. Preoperative Management of Endocrine, Hormonal, and Urologic Medications: Society for Perioperative Assessment and Quality Improvement (SPAQI) Consensus Statement. Mayo Clin Proc. 2021 Jun;96(6):1655-69.[Abstract][Full Text]
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