Source:http://linkedlifedata.com/resource/umls/id/C0332206
NCI: Interrupt the normal function of; hinder or prevent the progress or accomplishment of; stop from happening or developing; interfere with or prevent the reception of signals; impede the movement of.,HL7V3.0: <p><b>Definition:</b>The source act is performed to block the effects of the target act. This act relationship should be used when describing near miss type incidents where potential harm could have occurred, but the action described in the source act blocked the potential harmful effects of the incident actually occurring.</p>