gastric lavage
Noun
Meaning
washing out the stomach with sterile water or a saltwater solution; removes blood or poisons
Source: WordNetHypernyms
Examples
when the doctor ordered a gastric lavage the hospital pumped out my stomach
Convulsions, if present, should be controlled before attempting gastric lavage.
However, if vomiting is not initiated in the immediate aftermath, your veterinarian will need to perform a gastric lavage (stomach irrigation) to wash out the stomach contents.
Gastric lavage may be of some use in certain cases.