For anemia and thrombocytopenia in the hospitalized patient
Practice separating terrain, weighting, and visible action
How this module fits in Consult Practice
This is an Applied Consult Practice module.
It trains category discipline across the three core lenses.
It helps you practice how expert consultants:
- define the clinical terrain (Orientation)
- assign provisional weight (Thinking)
- and make judgment visible (Execution)
This module reinforces that these activities occur in parallel, not in sequence — and that confusing them is a common source of error.
What this module is for
These cases are designed to help you recognize what kind of consult problem you are facing before reaching for diagnosis or treatment.
They teach posture, not protocol.
Your task in each case is to decide:
- how dangerous the moment feels
- which explanations deserve weight
- and what must become visible now
This is not about being right early.
It is about behaving safely while truth is still emerging.
Where this fits in the four-phase structure
These exercises primarily train:
Phase 1 — Danger Recognition
recognizing terrain and urgency
Phase 2 — Provisional Framing & Weighting
assigning provisional cognitive weight
Phase 4 — Recalibration Over Time
updating stance as trajectory evolves
Execution is practiced implicitly in every case.
Why this matters
Most consult errors arise not from missing knowledge, but from misjudging the terrain or collapsing lenses.
Experts avoid:
- premature commitment
- forced coherence
- and silent escalation without justification
This module makes those judgment habits visible and teachable.
Exercise Set A — Location defines the terrain
Case 1 — Medical ward
A 72-year-old woman admitted for pneumonia has hemoglobin 9.8 g/dL. Platelets fall from 240K to 78K over four days. She is on ceftriaxone and heparin prophylaxis.
Orientation: Hospital-acquired thrombocytopenia terrain
Thinking: Weight drugs and infection before unifying physiology
Execution: Protect against bleeding, review medications, monitor trajectory
Case 2 — Cardiac ICU
A 64-year-old man on VA-ECMO has hemoglobin 7.5 g/dL and platelets 52K. LDH is elevated. No neurologic symptoms.
Orientation: Mechanical support / shear-stress terrain
Thinking: Circuits and anticoagulation outrank unification
Execution: Support physiology, reassess counts over time
Case 3 — Chronic liver disease unit
A 58-year-old man with cirrhosis has baseline hemoglobin 10.2 g/dL and platelets 88K. Both stable over months.
Orientation: Chronic hypersplenism terrain
Thinking: No forced consolidation needed
Execution: Routine surveillance
Exercise Set B — Timing defines plausibility
Case 4 — Acute parallel decline
A 44-year-old woman presents with fatigue and bruising. Hemoglobin is 7.9 g/dL, platelets 24K. Both were normal two weeks ago. Creatinine is rising.
Orientation: Catastrophic shared-process terrain
Thinking: Early unifying vigilance warranted
Execution: Escalate immediately while confirming
Case 5 — Chronic anemia, acute thrombocytopenia
A 66-year-old man with known iron deficiency (baseline Hgb 8.5 g/dL) is admitted for UTI. Platelets fall from 190K to 61K in 48 hours.
Orientation: Overlapping but non-unifying terrain
Thinking: Drugs and infection dominate
Execution: Monitor counts, reassess if anemia begins evolving too
Case 6 — Chronic thrombocytopenia, acute anemia
A 35-year-old woman with known ITP (baseline platelets 45K) presents after a GI bleed. Hemoglobin is 6.8 g/dL.
Orientation: Bleeding-dominant terrain
Thinking: Anemia is acute blood loss, not unification
Execution: Stabilize and support; no new hematologic urgency
Exercise Set C — Severity shapes urgency
Case 7 — Mild abnormalities
Hemoglobin 10.9 g/dL, platelets 122K, stable over one week.
Orientation: Low-risk overlap terrain
Thinking: No escalation needed
Execution: Routine follow-up
Case 8 — Severe thrombocytopenia
Hemoglobin 9.2 g/dL, platelets 12K, new today.
Orientation: Dangerous physiology terrain
Thinking: Bleeding risk dominates regardless of mechanism
Execution: Intervene and communicate urgently
Case 9 — Severe anemia
Hemoglobin 6.1 g/dL, platelets 110K.
Orientation: Acute blood-loss or hemolysis terrain
Thinking: Severity outranks unification
Execution: Stabilize physiology; reassess if platelets begin to fall
Bottom line
These cases do not teach diagnosis.
They teach posture.
They train you to decide:
What kind of clinical problem is this right now, and how should I behave while uncertainty remains?
That is the work of:
Orientation — defining the terrain
Thinking — weighting explanations
Execution — making stance visible and revisable over time