How To Insert An OG Tube In An Intubated Patient | OG Skill

Disclaimer: This article shares general medical information for clinicians and students. It does not replace local policies, formal training, or bedside supervision, and it is not a guide for anyone without professional healthcare credentials.

Why Orogastric Tubes Are Used In Intubated Patients

An orogastric tube runs from the mouth down the esophagus into the stomach. In a person with an endotracheal tube in place, this small piece of plastic can change day-to-day care. It lets the team drain air or fluid from the stomach, give feeds, or deliver medicines when swallowing is not possible.

Positive pressure ventilation tends to push air into the stomach. Air and fluid build-up raise the diaphragm, limit chest movement, and raise the risk of vomiting. Decompression through an orogastric tube can ease ventilation and reduce gastric pressure.

Short-term enteral feeding is another common reason for an orogastric tube. As long as the gut is working, feeding through the stomach helps maintain gut lining, glucose control, and drug absorption. Professional bodies such as the American Society for Parenteral and Enteral Nutrition describe enteral routes as the preferred first option when feasible.

How To Insert An OG Tube In An Intubated Patient In Clinical Settings

The title of this section reflects the common search phrase, but the actual procedure belongs in local clinical protocols and hands-on teaching. What follows is a high-level outline of the phases that trained staff follow, not a step list for independent practice.

Preparation And Safety Checks

Before anyone reaches for an orogastric tube, the team clarifies why the tube is needed and who is suitable. Local policies, such as the NSW Health guideline on intragastric tubes, set out contraindications and senior input. These often include recent facial or esophageal trauma, known varices, and post-operative anatomy that could make blind passage unsafe.

Baseline observations, airway stability, and ventilator settings are reviewed. An orogastric tube seems simple, yet insertion can trigger gagging, coughing, or brief desaturation. Having the right staff at the bedside, with suction ready and drugs for comfort already prescribed, keeps risk down.

Choosing The Tube And Measuring Length

Tube choice depends on the main task. A larger bore drains thick gastric contents more easily, while a smaller, softer tube may suit longer term feeding. Most orogastric tubes have centimetre markings along the shaft, radiopaque lines for imaging, and side holes near the tip.

To reach the stomach without looping in the throat, the clinician measures a length on the body surface. A common method for adults is to measure from the lips to the ear and then down to a point between the lower end of the breastbone and the navel. This estimate guides the first target depth for the tube.

Insertion Technique At The Bedside

Insertion usually takes place with the person lying supine. The clinician stands at the head of the bed with a clear view of the mouth and the endotracheal tube.

The tube is checked for free flow through the lumen and lubricated according to local policy. The clinician then introduces the tip into the mouth, guides it along the tongue, and advances it behind the endotracheal tube toward the throat. Gentle rotation of the tube, small advances, and pauses to watch the monitor help the tube progress while the airway stays secure.

Mild resistance at the back of the throat is common. Firm resistance, new bleeding, sudden desaturation, or arrhythmia are danger signs that lead the team to stop and reassess. In some centres a laryngoscope or video laryngoscope is used to guide the tube visually past the glottis and into the esophagus.

Confirming OG Tube Position And Keeping Patients Safe

Once the tube reaches the planned depth, the task shifts from insertion to confirmation. Misplaced tubes into the airway, pleural space, or skull base can cause severe harm, so verification never relies on a single quick check.

Institutional procedures draw on sources such as the UCSF NG feeding tube protocol and the NSW Health document on intragastric tubes. These set out a layered approach that combines bedside checks with imaging when needed.

Bedside Checks Before Any Feeding Or Suction

At the bedside, staff often start with simple assessments. They may look for free movement of the guidewire if present, aspirate gastric contents, and gauge the colour and volume. Testing the pH of aspirate can help distinguish gastric from respiratory position, though drugs that raise gastric pH limit this method.

Traditional air insufflation with stethoscope alone is not reliable and should not stand as the only check. Modern guidance places greater weight on aspirate assessment, capnography, and imaging.

Imaging And Gold Standard Confirmation

Plain radiography remains the accepted gold standard for many adult patients. A chest or abdominal film lets the clinician trace the course of the tube, confirm that it follows the esophagus, and see the tip below the diaphragm. Articles describing new approaches to orogastric tube placement still treat imaging as the final safety step.

When the film is reviewed, the reader documents whether the tube is safe to use, safe at a shorter depth, or needs removal and reinsertion. The tip position and depth are then written in the notes and usually added to a bedside label for quick reference.

In advanced units, ultrasound or fluoroscopy may help tube placement in complex cases. These tools can cut down repeated blind attempts in patients with unusual anatomy.

Practical Tips For OG Tube Placement In An Intubated Patient

Even when policies look clear on paper, real patients bring variation. A few habits make day-to-day practice smoother and safer.

First, planning the procedure during a period of relative stability helps. Staff aim for a time when blood pressure and oxygenation look steady, sedation is adequate, and alarms are quiet. This reduces the chance that desaturation or agitation will interrupt insertion.

Second, teamwork at the bedside matters. One person steers the tube, a colleague watches the monitor and ventilator waveform, and another person manages suction and patient comfort. Clear verbal cues such as “advancing five centimetres” or “pausing because of resistance” keep the whole team on the same page.

Third, documentation should be precise. The chart entry records the indication, size and type of tube, measured length, depth at the lips, bedside checks performed, and whether imaging confirmed position. This written trail guides later decisions about feeding, drug administration, and eventual removal.

Professional groups such as ASPEN offer ASPEN enteral nutrition resources that complement local protocols. Patient-facing material from hospitals, such as the CHOP question and answer sheet on nasogastric and orogastric tube feedings, can also help staff frame explanations in plain language for families.

Risks, Complications, And When To Stop

Each invasive device brings risk. During passage of an orogastric tube these include nasal or oral trauma, bleeding, tube coiling in the mouth or pharynx, or unintended entry into the trachea. Patients with head and neck injuries, coagulopathy, or varices sit in higher risk groups and often need senior review before any attempt.

After insertion, misplaced tips can lead to aspiration, perforation, or feeding into the lung. Case reports describe rare but severe events such as intracranial placement in patients with basal skull fractures, which is why many policies list such injuries as absolute contraindications. Staff should never feel pressured to keep advancing against resistance or in the face of new neurological signs.

Stopping and calling for help is always acceptable. Escalation may mean asking a senior intensivist or anesthetist to assist, involving gastroenterology or surgery, or arranging radiology-guided placement. A safety mindset grows when teams praise early escalation instead of quiet persistence with a difficult tube.

Main Takeaways For Safe OG Tube Care In Intubated Adults

The phrase “how to insert an OG tube in an intubated patient” describes a procedure that belongs only in trained hands. For bedside teams, success rests on clear indications, careful preparation, gentle technique, and reliable confirmation with imaging and bedside checks.

For clinicians, ongoing education through local teaching, simulation, regular bedside drills, and current guidance from bodies such as NSW Health, UCSF, and ASPEN keeps practice aligned with modern standards.