# Nasogastric Tube Nursing Care > Nasogastric (Ryle's) tube nursing: size selection, nose-earlobe-xiphoid measurement, pH confirmation of placement, safe feeding positions and complications. - Canonical URL: https://prepelephant.com/topics/allied/nursing/nasogastric-tube-nursing - Exam / course: Allied Health · Subject: Nursing - Publisher: PrepElephant (https://prepelephant.com) — Prepared and reviewed by the PrepElephant Academic Review Team - First published: 2026-10-02 - Last updated: 2026-10-02 - How to cite: "Nasogastric Tube Nursing Care", PrepElephant, https://prepelephant.com/topics/allied/nursing/nasogastric-tube-nursing ## Direct answer Placement confirmation separates a feeding tube from a hazard: before every feed, aspirate gastric contents and check pH of 5.5 or less, with a chest X-ray as the gold standard in doubtful and high-risk patients — auscultation of injected air alone is no longer accepted practice. Adult tubes run 14-18 French, and insertion length is measured from nose tip to earlobe to xiphisternum, roughly 50-60 centimetres, before lubricated insertion with the neck flexed. Feed the conscious patient sitting up and the unconscious patient with the head elevated 30-45 degrees during and for an hour after feeding, flushing with water before, between and after feeds. The feared complication is aspiration; the overlooked one is refeeding syndrome. ## What you must remember - **Sizing:** adults 14-18 Fr for feeding, wider bore (16-18 Fr) for gastric decompression; children 6-12 Fr by age. - **Measurement:** nose tip → earlobe → xiphisternum, marked on the tube at the nostril, giving about 50-60 cm in adults — insert to the mark, no further. - **Confirmation hierarchy:** X-ray is the gold standard; bedside pH of aspirate 5.5 or less confirms gastric placement before every feed; the whoosh test is unreliable because air injected into a bronchus sounds identical. - **Re-check before every feed:** placement, residual volume and tube position at the nostril mark — a tube that migrates out by even a few centimetres can feed the oesophagus or airway. - **Feeding rules:** head elevation 30-45 degrees during and 30-60 minutes after, feed at room temperature, hang time for an open system under 4 hours, flush with 20-30 mL water before, between and after feeds. - **Residuals:** large residuals (commonly over half the previous feed) call for withholding the feed, reassessment and physician review, not force-feeding through. - **Complications:** aspiration pneumonia, diarrhoea, tube displacement, nasal ulceration and sinusitis, electrolyte disturbance, and refeeding syndrome — hypokalaemia, hypophosphataemia and hypomagnesaemia in the first days of feeding the malnourished. - **Daily care:** oral hygiene twice daily or more, nostril cleaning with the tube repositioned off the pressure point, and securement that does not drag on the nostril. ## Passing a Ryle's tube in a semi-conscious stroke patient Explain anyway — hearing survives comprehension loss in many stroke patients. Measure nose-earlobe-xiphisternum, mark the tube, lubricate the tip, and pass gently along the floor of the nose with the neck slightly flexed; resistance that will not yield means withdraw and try the other nostril, never force. At the pharynx a swallowing attempt carries the tube down; in the patient who cannot swallow on command, advance between gentle breaths with suction ready, because this is the moment of aspiration risk. When the mark reaches the nostril, aspirate: gastric fluid turning the pH strip 5.5 or less means feed may begin; blood-stained or pH-neutral aspirate means stop and image. Feed the patient at 30-45 degrees head elevation, start slow and low-volume, and in the severely malnourished watch potassium, phosphate and magnesium daily for the first week — refeeding syndrome kills quietly in exactly the patients the tube was placed to save. ## The Indian context Indian wards and exams still say "Ryle's tube" — the eponym every examiner and ward sister uses for the nasogastric tube — and the INC skill checklist examines the measurement and confirmation sequence as separate markable steps. The pH strip is the reality check of Indian intensive care: cheap, bedside, and it retires the whoosh test that older textbooks still print. Tube feeding is the bridge home for countless stroke and head-injury survivors, so the discharge teaching writes itself: family feeding technique by demonstration, head elevation explained as non-negotiable, flushes with cooled boiled water, and the warning signs — vomiting, breathing changes during feeding, a loose tube — that mean stop feeding and return. At the district level, the nurse is also the dietitian: calculate the household feeds — rice gruel, dal water, milk, curd — with enough calories and protein rather than thin rice water alone, which is the commonest home-feeding error. ## Frequently asked questions ### What is the gold standard for confirming nasogastric tube placement? A chest or abdominal X-ray visualising the tube tip below the diaphragm; at the bedside, gastric aspirate pH of 5.5 or less is the accepted check before each feed. ### Why must the head be elevated during tube feeding? Thirty to forty-five degrees of elevation prevents regurgitation and aspiration of formula into the airway, the deadliest complication of enteral feeding. ### How is the insertion length of the tube measured? From the tip of the nose to the earlobe and then to the xiphisternum, marked on the tube — approximately 50-60 centimetres in an adult. ### Why is the auscultatory (whoosh) test no longer recommended? Air instilled into the respiratory tract through a malpositioned tube produces an identical sound, so the test cannot reliably distinguish gastric from bronchial placement. ### What is refeeding syndrome? The potentially fatal shift of potassium, phosphate and magnesium into cells when feeding restarts in malnourished patients, requiring slow initiation of feeds and daily electrolyte monitoring.