Module 5 — Quick-Access Cards

For use when cold antibodies are present, anemia may or may not be active, and danger depends on physiology, exposure, and tempo, not serology alone.

Posture (read once)

Treat cold agglutinin disease as a conditional physiologic risk state, not a constant emergency.

Assign weight based on hemolysis, exposure, and tempo.
Prevent avoidable harm.
Release urgency when biology allows.

Card Sequence (real consult cognition)

O → D → T → E → R

You may enter at any point,
but safety requires completing the full loop.

Card O1 — Orientation

The CAD Terrain at a Glance

Purpose
Define what world this patient is in before reasoning or action.

Signals to scan

• Hemoglobin: falling, stable, or long-standing low
• Hemolysis markers: present or absent
• Physiologic state: stable vs stressed (infection, cardiopulmonary disease)
• Exposure risk: ICU, imaging, OR, procedures, transport, transfusion
• History: known CAD vs new or incidental DAT

Rapid terrain mapping

• Stable Hb + no hemolysis markers → Latent antibody state
• Exposure risk present ± mild hemolysis → Trigger-amplified terrain
• Falling Hb + active hemolysis markers → Active hemolysis world

This is terrain definition, not diagnosis and not action.

Card D — Danger Recognition

When CAD Becomes Clinically Hazardous

Purpose
Identify when vigilance must rise before harm occurs.

Danger now (requires immediate attention)

• Falling hemoglobin with hemolysis markers
• Cardiopulmonary compromise in anemic patients
• Transfusion occurring without warming precautions
• Hypothermia or temperature instability

Danger anticipated (requires planning and communication)

• Upcoming procedures, imaging, transport, or OR exposure
• ICU environment or prolonged cold exposure
• High inflammatory or infectious stress

Asymmetry reminders

• DAT positivity alone ≠ danger
• Normal hemoglobin ≠ safety if exposure risk is rising
• Harm in CAD is often iatrogenic and preventable

Card T1 — Thinking

Provisional Framing in CAD (Disease-Specific)

Purpose
Assign posture without premature escalation or false reassurance.

Ask

• What is the dominant threat right now – hemolysis, exposure, anemia tolerance, or none?
• Is this hemolysis-driven, exposure-driven, mixed, or quiet?
• Would treating the trigger (cold, infection) reduce risk without disease-directed therapy?
• What specific change would force me to escalate?

Posture principle

Prevent exposure-driven harm first.
Treat hemolysis if and when it declares itself.
Do not treat antibodies in isolation.

Card E1 — Execution

What Must Become Visible to the Team

Purpose
Translate judgment into shared understanding.

State explicitly:

• whether hemolysis is present or not
• which exposures must be avoided
• what precautions are required (warming, coordination)
• what is being monitored
• what would trigger escalation

Example language

“This patient has cold agglutinins but no active hemolysis.
The main risk is cold exposure.
We recommend warming precautions and daily hemolysis labs.
Please call if hemoglobin falls or if procedures are planned.”

Execution goals

Align the team.
Prevent silent harm.
Legitimize restraint.

Card E2 — Execution Addendum

Transfusion in CAD (High-Anxiety Scenario)

Purpose
Frame execution posture when transfusion is contemplated.

Orientation reminder

• Serologic incompatibility does not equal clinical contraindication.
• Transfusion risk is exposure-mediated, not antibody-mediated.

Execution stance

• Coordinate early with blood bank
• Use warmed blood and warmed lines
• Monitor clinically and biochemically
• Communicate that transfusion is being done despite serology, because physiology requires it

What to say

“Serology complicates matching but does not prohibit transfusion.
The priority is physiologic support with strict warming precautions.”

(This is execution framing, not a protocol.)

Card R — Recalibration

Revision Over Time

Purpose
Prevent early framing from becoming fixed.

Re-ask

• Has hemoglobin stabilized, fallen, or recovered?
• Has hemolysis declared itself or resolved?
• Has exposure risk changed?
• Can vigilance now be safely released?

Name the release

“Earlier concern was appropriate given uncertainty.
With stable hemoglobin and no hemolysis, we can now reduce urgency.”

Principle

Release by non-progression is success.
Avoid momentum bias.

Bottom Line — How to Use These Cards

These cards are not a protocol.

They are prompts for a cognitive sequence that experienced consultants run automatically.

• Run the full sequence at initial consult
• Re-enter individual cards as conditions change
• Use the language to teach and to protect restraint

Use them until the sequence becomes instinct.
Then use them to teach.