| Code | Trigger Item |
| S1 | Return to surgery |
| S2 | Change in procedure |
| S3 | Admission to ICU post-op |
| S4 | Intubation/reintubation/BiPap in PACU |
| S5 | X-ray intra-op or in PACU |
| S6 | Intra-op or post-op death |
| S7 | Mechanical ventilation greater than 24 hrs post-op |
| S8 | Intra-op epinephrine, nor-epinephrine, naloxone, or romazicon |
| S9 | Post-op trophonin level greater than 1.5 ng/ml |
| S10 | Change of anesthetic during surgery |
| S11 | Consult requested in PACU |
| S12 | Pathology report normal or unrelated to diagnosis |
| S13 | Insertion of arterial or central venous line during surgery |
| S14 | Operative time greater than 6 hrs |
| S15 | Removal/injury or repair of organ |
| I1 | Pneumonia onset |
| I2 | Readmission to ICU |
| I3 | In-unit procedure |
| I4 | Intubation/reintubation |