Among the devices in routine use at every hospital bedside, the nasoenteric feeding tube is among the oldest in concept and the least altered in form. Its components have been replaced. Eel-skin and whalebone gave way to rubber, rubber to polyvinyl chloride, PVC to polyurethane and silicone. The bore has shrunk. Its tip has been weighted; its placement, in better-resourced settings, has been guided by fluoroscopy or electromagnetic tracking. None of these refinements has changed the route or the basic patient experience. A flexible tube is introduced through the upper aerodigestive tract, passed behind the larynx, and advanced into the stomach or the proximal small bowel. Well over a million such tubes are placed in the United States every year. They are the first thing reached for when a patient cannot, or will not, eat. They are, by repeated measurement, the most painful procedure routinely performed in the emergency department. And in the forty-seven years since percutaneous endoscopic gastrostomy displaced the open Stamm operation, no comparable replacement has occurred at the front end of enteral access.
This essay is a survey of that history and an account of what it suggests about the category.
Origins.
The deliberate use of a tube to deliver nutrition into the stomach is documented from at least the late sixteenth century. Capivacceus of Padua, around 1598, and his pupil Fabricius ab Aquapendente, in 1617, are credited in the secondary historical literature with the earliest descriptions; the underlying primary documents are difficult to consult, and the attributions are sometimes contested. What is not in dispute is that by the end of the eighteenth century the practice was known well enough that a surgeon called to a paralyzed patient could improvise a workable device in a matter of hours.
The case most often cited is John Hunter’s, in March 1790. Hunter, then Surgeon to King George III and within days of his appointment as Surgeon General of the British Army by Prime Minister William Pitt, was summoned to a London patient with paralysis of the muscles of deglutition. The patient could not swallow. The conventional treatments of the day (cupping, blistering, electrical stimulation) had failed; the only available alternative for nutrition was rectal infusion of jellies and broths, a route now understood to be of essentially no nutritional value. Hunter sheathed a length of whalebone in eel-skin, fixed a small sponge at the distal end, and attached the proximal end to an animal bladder fitted with a wooden pipe of the kind used for enemas. He introduced the device into the stomach and infused a slurry of beaten eggs, jellies, milk, sugar, and wine. The patient survived. Hunter’s account appears in the posthumous edition of his collected works edited by James Palmer (1835–1837).
A small but consequential point about that case: Hunter’s tube, as described in the contemporary record and in the dominant secondary historical literature, was placed orally rather than nasally. The credit for the nasal route belongs to the earlier Italian descriptions. What Hunter demonstrated is the more basic fact: that a soft, flexible conduit could deliver nutrition past a paralyzed swallow, and that the patient on the other end of it could be kept alive by it.
The instrument.
The nineteenth century supplied the materials. Goodyear’s vulcanization of rubber in 1839 made it possible to manufacture a tube that was smooth, pliable, and reproducible. Stomach pumps were patented for the treatment of poisoning; the same instruments were repurposed for feeding. By the 1870s, French and German physicians were routinely passing soft rubber catheters into the stomach for gastric lavage; by the 1890s, hospitals in Europe and the United States were using rubber tubes to feed cases of esophageal cancer, typhoid, and what was then called refusal-to-eat among the institutionalized.
The instrument we would now recognize as a nasogastric tube was described in 1921 by Abraham Louis Levin, an internist in New Orleans, in a brief note in the Journal of the American Medical Association: a single-lumen rubber catheter with a closed, weighted tip and lateral openings, designed to be passed through the nostril into the stomach and, if desired, advanced into the duodenum. The same year, on the other side of the Atlantic, John Alfred Ryle of Guy’s Hospital published in The Lancet a thinner, more flexible rubber tube for the diagnostic aspiration of gastric contents. The Ryle tube and the Levin tube are, for practical purposes, the same idea arrived at independently; in Britain and the Commonwealth, Ryle’s tube remains the everyday name for the device.
The next two decades belonged to the surgeons. Owen Wangensteen and J. R. Paine, at the University of Minnesota, demonstrated in 1933 that continuous nasogastric suction could resolve many cases of acute small-bowel obstruction without an operation. In the decade that followed, mortality from acute small-bowel obstruction fell substantially. Miller and Abbott, at the University of Pennsylvania, described a double-lumen, balloon-tipped intestinal tube long enough to traverse the entire small bowel, allowing decompression and contrast study of the small intestine without opening the abdomen. The Cantor tube, weighted with mercury, followed in 1951. The Sengstaken–Blakemore tube, with its esophageal and gastric balloons for tamponading variceal bleeding, followed in 1950. Each was a variation on the same architecture.
The decisive paper for modern enteral nutrition, the moment the tube stopped being a drainage device and started being a feeding device by design, appeared in August 1976. Robert Dobbie and J. A. Hoffmeister, in Madison, Wisconsin, described a small-caliber, flexible feeding tube positioned past the pylorus and used with a continuous infusion pump to deliver a non-elemental liquid diet into the duodenum or proximal jejunum. The tube has been known for fifty years as the Dobhoff. Every contemporary nasojejunal feeding tube is still built on that principle: small bore, weighted tip, soft polyurethane, continuous low-rate infusion past the pylorus. Subsequent refinements (the Bengmark self-propelling spiral; the Cortrak electromagnetic placement system; capnographic placement confirmation) have improved tip placement and reduced the radiation burden of confirmatory chest films. None of them changed the route.
What the tube made possible.
Nasoenteric tubes built modern critical care. Without reliable bedside-placeable gastric decompression, the postoperative ileus of the early-twentieth-century surgical patient was a frequent cause of death; without bedside-placeable enteral nutrition, the long-stay ICU patient of the 1970s was a candidate for total parenteral nutrition or none at all. Enteral nutrition, where the gut works, has measurable advantages over parenteral nutrition: preserved mucosal integrity, lower rates of bacterial translocation, fewer infectious complications, substantially lower cost. In the acute setting, most of that benefit is delivered through a small tube taped to the patient’s cheek.
The category also reshaped neonatology, where the premature infant cannot coordinate suck, swallow, and breath but can absorb. It reshaped head-and-neck oncology, where the irradiated oropharynx tolerates a tube past the burn. It reshaped stroke care, where post-stroke dysphagia is sometimes recoverable and the nasoenteric tube is the bridge to recovery. It reshaped the management of severe eating disorders, where refeeding the malnourished anorexic patient is now a protocolized, NG-delivered process. It has an established role in palliative medicine. An estimated 250,000 patients in the United States are on some form of home enteral nutrition at any given time, a meaningful fraction of them on nasal access while awaiting transition to a more permanent route.
What the tube did not change.
The clinical literature on the patient experience of nasoenteric tubes is consistent.
In a prospective study of 1,171 procedures across fifteen of the most common interventions performed in an academic emergency department, Singer and colleagues asked patients and clinicians to rate each procedure on a 100-mm visual analog scale. Nasogastric intubation was rated more painful than fracture reduction, incision and drainage of abscesses, urethral catheterization, and central-line placement, by patients and practitioners alike. A randomized trial from the same group, published the same year, demonstrated that topical anesthesia substantially reduces insertion pain, and that, in real-world practice, 65 to 90 percent of emergency physicians use none. Subsequent randomized trials of nebulized and atomized lidocaine confirmed the analgesic effect; uptake of these techniques has remained limited.
The anatomy explains the pain. The nasal mucosa is innervated by branches of the ophthalmic and maxillary divisions of the trigeminal nerve. The pharynx is innervated by the glossopharyngeal and vagus nerves. A tube passed from nostril to stomach traverses all three in sequence, in roughly fifteen seconds. The oral route, where it has been attempted for sustained feeding, runs into the gag reflex and the patient’s bite. The nasal route was adopted not because it is comfortable but because it is, marginally, more tolerable for sustained dwell.
The complications, even setting aside the pain of insertion, are not minor. Sorokin and Gottlieb’s review of more than 2,000 small-bore feeding-tube insertions at Jefferson University Hospital documented a 1.3% to 2.4% rate of pulmonary misplacement over four years, with most events in patients with altered mental status or with endotracheal tubes in place. de Aguilar-Nascimento and Kudsk reported a 3.2% rate in a similar cohort. Sparks and colleagues, reviewing 9,931 narrow-bore nasoenteric tubes, catalogued the full spectrum of pulmonary complications associated with blind placement. The downstream harms, when nutrient formula is infused into a lung instead of a stomach, are severe: aspiration pneumonitis, empyema, death.
In the United Kingdom, the National Patient Safety Agency made the count explicit. In February 2005, after eleven deaths and one case of serious harm over two years, the NPSA issued Patient Safety Alert 05, mandating pH testing of aspirate (cut-off ≤ 5.5) and chest radiographic confirmation of tube position, and prohibiting the bedside maneuvers (auscultation, blue litmus paper, absence of respiratory distress) that had been in routine use. Between the completion date of that alert in September 2005 and March 2010, the NRLS received reports of a further 21 deaths and 79 cases of harm attributable to feeds delivered through misplaced tubes. Between September 2011 and March 2016, NHS England documented an additional 95 such incidents. Misplacement of a nasogastric tube, used before confirmation, is now classified as a Never Event in the English NHS. Capnography, end-tidal CO₂ detection, and electromagnetic tip-tracking have been deployed as additional safeguards. None has eliminated the problem, because the underlying anatomy has not changed.
Dwell-time injuries add a further layer: nosocomial maxillary sinusitis in the ventilated ICU patient with a tube blocking the ostiomeatal complex, alar pressure necrosis where tape and tube meet skin, ulcers of the columella, retropharyngeal abscesses. Unplanned tube removal, whether patient-pulled, dislodged during repositioning, or migrated out, has been reported in prospective ICU series at rates between 25% and 50%, with each replacement carrying its own incremental risk of misplacement.
The shape of the problem.
For forty-seven years, the only fundamentally new route for enteral access to have entered routine practice has been the one that goes through the abdominal wall. PEG, in 1979, was an honest replacement: a worse thing (Stamm gastrostomy under general anesthesia) displaced by a better thing (a bedside endoscopic procedure under sedation), with measurable evidence and adoption to match. At the front end of enteral access, where the short-term tube is placed in the patient who needs nutrition for days or weeks rather than months or years, no comparable replacement has occurred. The route remains nasal. The patient experience remains what Singer’s study documented. The complications remain what the NPSA continues to count. The engineering literature on tube design, for forty years, has concerned itself with bore size, tip weighting, and electromagnetic placement guidance. These are refinements at the margin of an experience whose core has not meaningfully changed since the eighteenth century.
This is the gap in which Alsteni Medical was built.
Disclosure and current status.
Alsteni Medical is in clinical development. The first-in-human feasibility data on our approach were published in 2020 in Nutrition & Diabetes (Nature Publishing Group) by Beale and colleagues. Across 334 cumulative device-days, the study recorded zero serious adverse events, with a within-group weight-loss signal of −2.40 kg over 14 days (p = 0.008). Our FDA Pre-Submission, Q252869, was completed in December 2025. In that interaction, the Agency identified an orogastric/oroenteric enteral feeding tube predicate under 21 CFR 876.5980 and indicated that limited clinical data, focused on tolerability, nutrition delivery, and safety, may support preparation of a future 510(k) submission. A confirmatory clinical study is in design with our partners at MedTech Impact Partners. A Pre-Submission does not guarantee future clearance, and we do not imply that it does. The Alsteni System is an investigational device. It is not FDA cleared or approved.
The claim I would ask readers to take from this essay is not a claim about our device. It is a claim about the category. For forty-seven years, the front end of enteral access has been refined rather than rethought. The patients on the other end of it have been telling us, in study after study and alert after alert, what that refinement has and has not changed.