Prediction of early tolerance to enteral feeds by measurement of blood flow velocity in superior mesenteric artery in response to test feed
| Tolerance to enteral feeds | >17% | <17% | Total |
| <7 days after test feed | 14 | 0 | 14 |
| >7 days after test feed | 9 | 21 | 30 |
| Total | 23 | 21 | 44 |
A positive haemodynamic response is considered to be a change in time averaged mean velocity of greater than 17%.
Sensitivity, 100%; specificity, 70%; positive predictive value, 61%; negative predictive value, 100%.