Paeds · investigations-procedures-and-technology
Nasogastric tube insertion and verification
Also known as Paediatric nasogastric tube placement · NG tube pH verification · NG tube never event · Nasogastric tube insertion in infants and children · Orogastric tube placement in neonates
Fellowship guide to inserting and verifying a nasogastric (NG) tube in a child of any age, from the preterm neonate to the adolescent. Covers selecting the tube size by age, measuring the insertion length, the gentle age-adapted insertion technique, and confirming gastric position by aspirate pH testing at a threshold of 5.5 or less, escalating to a radiograph when the pH is above 5.5 or no aspirate can be obtained. Names and rejects the deprecated methods (the whoosh test, the bubbling test, litmus paper and auscultation alone), defends why feeding or medicating through an unverified tube is a Never Event, and recognises the complications of misplacement (respiratory intubation, pneumothorax, pleural feed) and of traumatic insertion (pharyngo-oesophageal perforation in neonates, intracranial misplacement). Includes ANZ, UK, US and Canada guidance.
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Red flags
- Feeding or medicating through a nasogastric tube whose position has not been verified, or has been verified only by a deprecated method such as the whoosh test
- Treating an absent aspirate as proof that the tube is safely in the stomach and proceeding to feed
- Accepting a pH reading above 5.5 as gastric, when acid suppression, a recent feed or small-bowel migration has raised the pH and the tube may not be in the stomach
- Passing a nasogastric tube through the nose of a child with a base-of-skull or significant mid-face injury, where the tube can enter the cranium
- Forcefully re-passing a tube in a neonate who has just deteriorated, when the real problem is a traumatic pharyngo-oesophageal perforation that re-passing will worsen
- Failing to re-verify after the tube has been retaped, after retching or vomiting, after transfer or after extubation, on the false assumption that it cannot have moved
Life stages
Care settings
Clinical exam formats
Board mappings
- General and Community Paediatrics — practical procedures and patient safety in infants, children and young people
- Acute care — nasogastric tube insertion, verification and the prevention of harm
- Acute and critical care — procedural skills, verification and escalation in nasogastric tube management
- Patient safety and quality improvement — the Never Event framework and verification systems
- Clinical Applications — practical procedures: nasogastric tube insertion and verification
- Medical Sciences — gastrointestinal anatomy, gastric physiology and the basis of pH verification
- Patient safety — the Never Event of feeding an unverified nasogastric tube
- Short case and structured discussion of a child needing a nasogastric tube, including size, technique and verification
- Discussion of a nasogastric tube Never Event and its prevention
- 4. Patient management: practical procedures and the safe use of enteral access devices
- 7. Patient safety: procedural verification, documentation and the prevention of Never Events
- Neonatology and gastroenterology: nasogastric and orogastric tube placement
- Foundation of Practice (FOP) — gastrointestinal anatomy and procedural principles
- Applied Knowledge in Practice (AKP) — nasogastric tube verification, the pH threshold and the Never Event
- Communication — explaining tube verification and the safety check to a family
- History and management — a child needing a nasogastric tube
- General Pediatrics Content Outline — procedural skills and patient safety in nasogastric tube placement
- General Pediatrics Content Outline — Neonatology and Gastroenterology enteral-access content
- Universal Task 4: Management and Treatment of the child needing enteral access
- Patient Care — performing nasogastric tube insertion with appropriate verification and monitoring
- Patient Safety and Quality Improvement — verification systems, documentation and the prevention of Never Events
- Medical Knowledge — gastrointestinal anatomy and the physiology of gastric acidity
- Medical Expert — nasogastric and orogastric tube placement and verification in children
- Collaborator — interprofessional roles in verification and documentation
- Patient Safety — the Never Event of feeding an unverified tube
Two questions that get blurred
Is the tube in the stomach?
Can I feed through it?
Volume of aspirate does not prove position · Exact pH 5.5 or less is the bedside green light · Radiograph when pH is above 5.5 or no aspirate · In no circumstance feed an unverified tube · Forceful re-pass in a neonate who deteriorated is the wrong reflex · Yes, re-verify after retching, retaping, transfer or extubation. [1] [3]
Overview & Definition
A two-year-old is admitted overnight with a small-bowel obstruction and needs her stomach decompressed, or a preterm infant on the neonatal unit cannot yet coordinate suck and swallow and needs milk by tube. In both cases the device is a nasogastric tube: a flexible, hollow tube passed through a nostril, along the floor of the nose, through the pharynx and oesophagus, to rest with its tip in the stomach. Its job is to open a safe route into the gut for feed, fluid or medicine, or to let gas and gastric contents out when the bowel is obstructed. [1] [8]
The procedure looks simple, which is exactly why it is dangerous. The nose, the pharynx and the opening of the airway sit within a centimetre or two of each other, so a tube aimed at the oesophagus can instead turn into the larynx and travel down the trachea into a bronchus. A child who is intubated, sedated, very young, or who simply cannot cough, gives no signal that this has happened. If feed or medicine is then poured down the tube, it fills the lung or the pleural space, and the child aspirates or develops a pneumothorax. The safety of the procedure therefore rests not on the insertion but on what you do afterwards: you verify the position, and you do it every time before anything goes down the tube. [4] [9]
The discipline comes from a patient-safety history. In the United Kingdom, a series of deaths and serious harms from feeding misplaced tubes led the National Patient Safety Agency, and later NHS England and NHS Improvement, to retire the old bedside checks and to make pH testing of aspirate standard. Feeding or medicating through a tube whose position has not been confirmed, or has been confirmed by a method that is no longer allowed, is now classified in the NHS framework as a Never Event: a serious, largely preventable incident that should not occur if the known safety barriers are in place. The same logic shapes Australasian, North American and European paediatric guidance. [1] [4] [8]
References11ShowHide
- [1]Irving SY, Rempel G, Lyman B Pediatric Nasogastric Tube Placement and Verification: Best Practice Recommendations From the NOVEL Project. Nutr Clin Pract, 2018.PMID 30187517
- [2]Northington L, Kemper C, Rempel G Evaluation of methods used to verify nasogastric feeding tube placement in hospitalized infants and children - A follow-up study. J Pediatr Nurs, 2022.PMID 34763985
- [3]Kisting MA, Korcal L, Schutte DL Lose the Whoosh: An Evidence-Based Project to Improve NG Tube Placement Verification in Infants and Children in the Hospital Setting. J Pediatr Nurs, 2019.PMID 30798144
- [4]Metheny NA, Krieger MM, Healey F A review of guidelines to distinguish between gastric and pulmonary placement of nasogastric tubes. Heart Lung, 2019.PMID 30665700
- [5]Metheny NA, Pawluszka A, Lulic M Testing Placement of Gastric Feeding Tubes in Infants. Am J Crit Care, 2017.PMID 29092869
- [6]Metheny NA, Stewart BJ, Smith L pH and concentration of bilirubin in feeding tube aspirates as predictors of tube placement. Nurs Res, 1999.PMID 10414681
- [7]Metheny N, Reed L, Wiersema L Effectiveness of pH measurements in predicting feeding tube placement: an update. Nurs Res, 1993.PMID 8247814
- [8]Longo MA Best evidence: nasogastric tube placement verification. J Pediatr Nurs, 2011.PMID 21726788
- [9]Taylor SJ Feeding tube safety: National guidance ignores the 'elephant in the room'. Int J Risk Saf Med, 2025.PMID 39973429
- [10]Andresen EN, Frydland M, Usinger L Deadly pressure pneumothorax after withdrawal of misplaced feeding tube: a case report. J Med Case Rep, 2016.PMID 26846268
- [11]Knight RB, Webb DE, P Coppola C Pharyngeal perforation masquerading as esophageal atresia. J Pediatr Surg, 2009.PMID 19944236