How Is Gastric Lavage Performed? Why Is Stomach Pumping Done?

Gastric lavage, medically known as gastric lavage or, in everyday language, stomach pumping, is a hospital procedure aimed at removing stomach contents with the help of a tube. It is most commonly considered in cases of suspected acute poisoning. However, contrary to common belief, this procedure is not a standard method automatically used in all poisonings. In current practice, gastric lavage is considered only in selected cases where the expected benefit clearly outweighs the significant risks.

For this reason, the question “How is gastric lavage performed?” should be addressed not in terms of methods that can be applied at home, but within the framework of a controlled medical procedure carried out in hospital conditions. The type and amount of substance taken, the time elapsed, the person’s level of consciousness, and airway safety are evaluated together during the decision-making process. In suspected poisoning, inducing vomiting, giving salty water to drink, or trying to cleanse the stomach by oneself is not safe; the correct approach is urgent medical assessment.

Why Is Gastric Lavage Performed?

The purpose of gastric lavage is to attempt to reduce absorption by removing a portion of the harmful substance that may still be present in the stomach. This is also the main reason why it is not performed in every poisoning: the procedure is considered only when a truly meaningful benefit is expected.

The decision is not made based solely on the information that “something toxic was ingested.” The type and amount of substance taken, the time elapsed, whether the patient has vomited, whether they are conscious, and whether their breathing remains safe are evaluated together. In some cases, close monitoring, supportive treatments, or other decontamination approaches may be more appropriate than gastric lavage.

How Is Gastric Lavage Performed in the Hospital?

Gastric lavage is performed only in a hospital setting, by an experienced team and under monitoring. The procedure does not mean that the stomach is completely “cleaned”; the aim is to remove a portion of the contents that may still remain in the stomach in a controlled manner.

The First Step Is to Assess Airway Safety

One of the most important steps before the procedure is assessing airway safety. In people with altered consciousness, fainting, seizures, shortness of breath, or a strong tendency to vomit, the risk of stomach contents entering the lungs, that is, aspiration, increases. In such a situation, securing breathing takes priority; the decision on gastric lavage is reconsidered only after this.

A Nasogastric or Orogastric Tube Is Used

In suitable patients, a tube reaching the stomach (a nasogastric tube or an orogastric tube placed through the mouth) can be used to remove a portion of the stomach contents in a controlled manner. The method to be used is determined by the healthcare team according to the patient’s age, clinical condition, and the characteristics of the substance ingested.

Monitoring Continues After the Procedure

Once gastric lavage is completed, the process is not considered over. Breathing, oxygenation, vomiting, abdominal pain, signs of bleeding and overall condition are closely monitored. Depending on the nature of the substance taken, additional supportive treatments, toxicology consultation, intensive care monitoring, or other interventions may be required.

In Which Situations Is Gastric Lavage More Often Considered?

In current medical practice, gastric lavage is most often considered in selected cases where a substance capable of causing severe toxicity has been ingested a short time earlier. In the evaluation, both the potential of the substance to cause serious toxicity and the likelihood that there is still removable content in the stomach are taken into account. Therefore, the procedure may be more meaningful particularly in early presentations.

It is accepted that the expected benefit of gastric lavage may be higher especially in the early period after ingestion of substances that carry a risk of significant toxicity. Although the first hour is important, the decision is not based solely on the time elapsed; the characteristics of the substance and the person’s clinical condition are also evaluated together. As time passes, the likelihood that the stomach contents have progressed into the intestines increases, so the expected benefit of the procedure may decrease. However, the decision is not made just by looking at the clock; the nature of the substance and the patient’s clinical condition are decisive.

Why Is Gastric Lavage Not Performed in Every Poisoning?

There are two main reasons why gastric lavage is not used routinely: it does not provide sufficient benefit in every case, and the procedure itself carries serious risks. Therefore, it is not considered a standard treatment for everyone with suspected poisoning. In some situations, performing the intervention may cause more harm than the expected benefit.

Its Effect May Be Limited in Late Presentations

If most of the harmful substance has already left the stomach, lavage may not be able to remove a significant amount of content. In such cases, tube placement and the procedure itself may introduce additional risks while the actual benefit remains low.

It Is Generally Not Performed After Ingestion of Corrosive Substances

Corrosive substances, such as caustic cleaning products and similar chemicals, can cause burns in the mouth, throat, esophagus, and stomach. In these individuals, gastric lavage is generally contraindicated because it may carry the substance back up and cause re-trauma to the damaged tissues. If there is a burning sensation in the mouth or throat, difficulty swallowing, chemical burn marks around the lips and mouth, or chest and abdominal pain, urgent evaluation is required.

Risk of Aspiration Is Prominent After Hydrocarbon Ingestion

Ingestion of petroleum-derived products and some hydrocarbons carries, among the most important problems, the risk of the substance entering the lungs. If aspiration occurs during vomiting or during the procedure, lung damage may worsen.

What Are the Risks of Gastric Lavage?

Gastric lavage is not a simple or harmless procedure. Even in appropriately selected patients, it requires close monitoring. When making the decision, not only the potential benefit but also possible complications during and after the procedure are taken into account.

Aspiration and Respiratory Problems

One of the most serious risks is aspiration. When stomach contents enter the lungs, shortness of breath, impaired oxygenation, and lung damage can occur. In people with impaired consciousness, this risk is more pronounced; therefore, airway safety takes precedence over the decision to perform gastric lavage.

Irritation or Injury in the Digestive Tract

During tube placement, irritation and injury may occur in the throat, esophagus, or stomach. If there is pre-existing corrosive damage, this risk becomes even more important. If bloody vomiting, severe abdominal pain, or marked deterioration occurs, urgent evaluation is required.

When Should the Emergency Department Be Visited in Suspected Poisoning?

If an unknown substance is swallowed, a large amount of medication is taken, or ingestion of a cleaning product or a petroleum-derived substance by mouth is suspected, urgent medical evaluation is required. Altered consciousness, fainting, shortness of breath, seizures, severe or bloody vomiting, chest or abdominal pain, and a burning sensation in the mouth and throat are important warning signs that require urgent assessment.

In both children and adults, the first evaluation in suspected poisoning is carried out via emergency medical services. Support from relevant specialties can be arranged when necessary. Whether gastric lavage is required is decided by evaluating the packaging of the substance, the approximate amount, the time elapsed, and the person’s clinical findings together. In suspected poisoning, the safest approach is to get the person to emergency medical care without delay.