Predicting gastric contents following trauma: an evaluation of current practice

Trauma is often assumed to increase the risk of pulmonary aspiration of gastric contents. The 247 anaesthetists in the Trent region of England were surveyed by postal questionnaire to ascertain the current practice for identifying patients at risk of pulmonary aspiration of gastric contents following trauma. The response rate was 79%. The anaesthetists rated the reliability of several criteria when predicting 'gastric safety' and stated whether each criterion formed part of their clinical practice. Interval of eating to injury was the most used (88%) and highest rated criterion (4/5) followed by use of opioids. Presence or absence of bowel sounds was the least used (7%) and lowest rated criterion (0/5). Currently there is little evidence that the commonly used criteria accurately identify 'at-risk' patients. There is little evidence that trauma increases the risk of aspiration although a number of factors associated with trauma are known to delay gastric emptying.