Hematology
| WBC | Consider cause of leukocytosis - post-op (typically to 12-14), stress reaction, infxn |
| Hgb | Transfuse < 7 (threshold is < 8 in patients with ACS (cardiac ischemia)) Consider cause of drops: dilutional (will see plt go down), fluid shifts, concern for bleeding |
| Plt | Typically will not transfuse unless < 10,000 - 50,000 If Plt dropping and pt is on heparin, consider HIT |
| INR | Goal < 1.5. If elevated, consider: liver injury, poor nutritional status (vit K) |
| Na | Between 130-150 likely clinically insignificant |
| K | Replete > 4.0 |