Emergency-Medicine on emsenn.net

Decision-Making Under Constraint

Sun, 08 Mar 2026 00:00:00 +0000

TCCC is often introduced as a set of clinical priorities, but its deeper contribution is decision structure: it makes explicit that the tactical situation is part of the clinical problem.

In hospital medicine, the environment is engineered to support care. In TCCC, care must be engineered to fit the environment.

¶Tactics drive medicine

The phrase “tactics drive medicine” is shorthand for a systems constraint: the team cannot provide care that would predictably create additional casualties, compromise mission-essential actions, or prevent movement to a safer position where more care becomes possible.

Documentation and Handoff

Sun, 08 Mar 2026 00:00:00 +0000

In tactical trauma care, care is commonly delivered in segments by different people at different times. Documentation is how those segments become one coherent treatment course rather than a series of disconnected actions.

¶Why documentation matters

Continuity - prevents duplicated actions and missed reassessments.
Safety - helps the next team understand what has already been tried.
Learning - enables after-action review and protocol improvement.

¶Handoff structure (example: MIST)

Many teams use a short structured handoff format such as MIST:

MARCH and PAWS

Sun, 08 Mar 2026 00:00:00 +0000

TCCC training commonly uses mnemonic priority algorithms to keep teams aligned under stress and to reduce “treatment drift” (doing what feels urgent rather than what prevents death).

These mnemonics are not a replacement for clinical judgment. They are a commitment to a sequence: treat what is most likely to kill first, reassess, then move down the list.

¶MARCH (priority order)

A common expansion is:

Massive hemorrhage
Airway
Respiration
Circulation
Hypothermia / head injury

The point is not memorizing letters; it is holding onto a priority structure when attention is fragmented.

Triage and Evacuation Precedence

Sun, 08 Mar 2026 00:00:00 +0000

TCCC decision-making becomes most explicit when the number of casualties exceeds the available hands, time, or evacuation capacity.

Two related but distinct questions appear:

Triage: who gets treated first (and at what level of intensity)?
Evacuation precedence: who gets moved first when transport is limited?

These can align, but they do not have to. A casualty may be medically urgent but logistically impossible to move; another may be movable and time-sensitive.

Fri, 06 Mar 2026 00:00:00 +0000

¶What you will be able to do

Distinguish between oxygenation (oxygen into blood, measured by SpO2) and ventilation (gas movement and CO2 clearance, measured by capnography), and explain why treating a ventilation problem with supplemental oxygen alone is insufficient.
Localize airway obstruction as upper (stridor, inspiratory difficulty) or lower (wheeze, expiratory difficulty) based on clinical signs, and explain why localization determines the intervention.
Apply the staged escalation framework: positioning → supplemental oxygen → airway adjuncts → positive-pressure ventilation → advanced airway, selecting the least invasive intervention that maintains oxygenation and ventilation.
Identify high-risk clinical signs that indicate impending airway failure: inability to speak in full sentences, stridor at rest, silent chest despite respiratory effort, worsening mental status, accessory muscle use, and tracheal tug.
Describe the anatomical differences in pediatric airways (larger occiput, anterior larynx, subglottic narrowing, lower oxygen reserve) and explain how they change management.
Articulate the immediate post-intubation priorities: confirm placement with capnography, secure the tube, anticipate post-intubation hypotension, ensure adequate sedation and analgesia.

¶Prerequisites

No formal prerequisites. The introductory curriculum is self-contained.
Familiarity with the respiratory system and nervous system is helpful.

¶Reference documents

Introduction to Airway Management — the introductory lesson
Airway Anatomy and Physiology Basics — structural foundation
Airway Assessment and Clinical Reasoning — bedside evaluation
Oxygen Delivery and Ventilation Support — the support ladder
Airway Treatment Principles — staged escalation
Pediatric Airway Differences — what changes in children
Post-Intubation Safety and Reassessment — after the tube
Common Airway Illnesses and Syndromes — clinical patterns

¶Scope

This skill covers conceptual understanding of airway assessment and the logic of airway management. It does not cover:

Introduction to Airway Management

Fri, 06 Mar 2026 00:00:00 +0000

¶Why the airway comes first

In emergency medicine, the ABCs — Airway, Breathing, Circulation — are not a mnemonic convenience. They are a priority sequence based on a physiological fact: a patient can survive minutes without circulation, but only seconds to minutes without a patent airway. Everything else — IV access, medications, imaging, definitive treatment — is irrelevant if the patient cannot move air.

This is not because the airway is more complex than other organ systems. It is because the airway is the bottleneck. The cardiovascular system can only deliver oxygen the respiratory system has acquired. The respiratory system can only acquire oxygen the airway allows to pass. A blocked airway makes every downstream system fail simultaneously.

Free Open-Access Medicine (FOAM) Origins and Social-Media History

Tue, 03 Mar 2026 12:00:00 -0600

Free Open-Access Medicine (FOAM) emerged from clinicians sharing practical teaching openly on the web, especially in emergency medicine and critical care communities.

¶Origins in emergency medicine

Emergency medicine had strong incentives for fast, scenario-based knowledge exchange: high acuity, broad case mix, and shift-based teams needing rapid cognitive alignment. Blogs and podcasts became early high-utility formats for this environment.

As social platforms matured, FOAM distribution accelerated through hashtags, thread-based debate, and cross-linking between educators, trainees, and specialty groups. This widened reach beyond single institutions and made near-real-time critique possible.

Emergency-Medicine on emsenn.net

Decision-Making Under Constraint

¶Tactics drive medicine

Documentation and Handoff

¶Why documentation matters

¶Handoff structure (example: MIST)

MARCH and PAWS

¶MARCH (priority order)

Triage and Evacuation Precedence

¶What you will be able to do

¶Prerequisites

¶Reference documents

¶Scope

Introduction to Airway Management

¶Why the airway comes first

Free Open-Access Medicine (FOAM) Origins and Social-Media History

¶Origins in emergency medicine

¶Social-media acceleration