Leukocytosis in the hospitalized patient
A category-discipline drill to strengthen consult reasoning
1. How this module fits in Consult Practice
| Lens | What it contributes here |
|---|---|
| Orientation | Defines which facts describe terrain (context, trajectory, differential) |
| Thinking | Defines stance and weighting (signal-discrimination, measured vigilance) |
| Execution | Defines what is communicated, watched, and revised |
2. What this module is for
To practice:
Is this fact defining terrain, changing posture, or directing visible execution?
3. How to use this module
Use on rounds or during sign-out.
For each line:
- assign it to Orientation, Thinking, or Execution
- state what it changes in your posture
- state what would cause you to revise that assignment
This makes cognitive discipline explicit and teachable.
4. Why this matters
Sorting protects against two common errors:
- magnitude-only alarmism
- premature reassurance (“it’s sepsis, so it’s fine”)
Most consult mistakes in leukocytosis are failures of category discipline, not failures of knowledge.
5. Core Content
Sorting cards
- WBC 30K, new today, was 12K yesterday.
- Patient is improving clinically on antibiotics.
- Differential shows 92% neutrophils with left shift.
- Smear shows blasts.
- This is a signal-discrimination problem, not a diagnosis.
- We should maintain measured vigilance and avoid premature closure.
- Repeat CBC and differential to follow trajectory.
- If blasts appear or the count accelerates, we will escalate the evaluation.
- Right now the leukocytosis is being treated as meaningful but provisional.
- Now that the count is falling and the patient remains stable, we can release earlier concern.
Answer key
| Card | Domain |
|---|---|
| 1 | Orientation |
| 2 | Orientation |
| 3 | Orientation |
| 4 | Orientation |
| 5 | Thinking |
| 6 | Thinking |
| 7 | Execution |
| 8 | Execution |
| 9 | Execution |
| 10 | Execution |
6. Bottom line
This module reinforces category discipline:
- Orientation defines the map
- Thinking assigns weight
- Execution makes judgment visible
Leukocytosis is a signal.
Sorting protects against magnitude-driven error and premature narrative closure.