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2. Healthcare Safety Investigation Branch (2020). Placement of nasogastric tubes I2019/006, December 2020. Tilgjengelig fra https://www.hsib.org.uk/documents/268/HSIB_Placement_of_nasogastric_tubes
3. National Patient Safety Agency (2011). Reducing harm caused by the misplacement of nasogastric feeding tubes. Patient Safety Alert NPSA/2011/PSA002; March 2011. Tilgjengelig fra: http://www.gbukenteral.com/pdf/NPSA-Alert-2011.pdf
4. National Health Services HS Improvement, Patient Safety Alert (2016). Nasogastric tube misplacement continuing risk of death and severe harm. NHS/PSA/RE/2016/006. Tilgjengelig fra: https://www.england.nhs.uk/wp-content/uploads/2019/12/Patient_Safety_Alert_Stage_2_-_NG_tube_resource_set.pdf
5. Patient Safety movement. Nasogastric tube (NGT) placement and verification. Actionable Patient Safety Solutions (APSS) # 15. Tilgjengelig fra https://patientsafetymovement.org/wp-content/uploads/2017/10/APSS-15-4.pdf
6. Journal of Emergency Nursing (2019), Clinical Practice Guidelines. Gastric Tube Placement Verification. Volume 45, issue 3, P306.E1-306. E19, May 01, 2019. Tilgjengelig fra https://www.jenonline.org/article/S0099-1767(19)30157-6/fulltext
7. Casebook (2012). Nasogastric tube errors. Volume 20, issue 3, September 2012. Tilgjengelig fra: https://www.medicalprotection.org/malaysia/casebook/casebook-september-2012
8. VAR Healthcare, Cappelen Damm AS . Nasogastrisk ernæringssonde: Metoder for kontroll av sondeleie (2020).
9. BMJ Best Practice. Nasogastric tube insertion animated demonstration. Tilgjengelig på: https://bestpractice.bmj.com/procedural-videos/en-gb/8bf768ca-e223-43ed-8fd0-1e8f43214c60
10. Bourgault, A. M. and Halm, M. A. (2009). Feeding Tube Placement in Adults: Safe Verification Method For Blindly Inserted Tubes. American Journal of Critical Care, 18(1), 73–76. doi:10.4037/ajcc2009911
11. Metheny, Stewart, Mills (2012). Blind insertion of feeding tubes in intensive care units: a national survey. American Journal of Critical Care, 21 (5): 352–360. doi:10.4037/ajcc2012549
12. NICE Clinical Guideline (CG 32, 2017). Nutrition support for adults: oral nutritional support, enteral tube feeding and parenteral nutrition. Management of tubes 1.7.17.