Respiratory Framework Library

Orientation / document purpose

Explains that the framework organizes breathing assessment from doorway impression through structured reassessment and is intended to support bedside recognition of severity, separation of ventilation from oxygenation, and mapping observations to failing physiologic domains.

Encounter architecture / workflow

Defines the progression from doorway impression to primary assessment, secondary assessment, and reassessment, including the purpose and outputs of each phase.

Core reasoning sequence / physiologic interpretation

Lays out the ordered respiratory reasoning sequence: adequacy gate, respiratory drive and control, mechanics and pump, ventilation and CO2 clearance, oxygenation and V/Q and recruitment, and integration of trajectory. Clarifies the difference between minute ventilation and effective alveolar ventilation.

Immediate bedside first-look framework

How to rapidly judge appearance, interaction, respiratory pattern, visible distress, oxygenation and perfusion appearance, audible clues, and whether ordinary stepwise assessment is safe or whether intervention must interrupt workflow.

Compressed hands-on severity assessment

Breathing presence and adequacy, chest rise, pattern, work of breathing, mechanics, sound-pattern screening, ventilation-versus-oxygenation judgment, speech and mentation, and the decision to continue, stabilize, or escalate.

Structured data-gathering and monitoring progression

Three-track secondary assessment: objective findings and monitoring and workup progression; focused history of the breathing problem; and modifier and safety history. Also explains interpretation by physiologic failing domain rather than diagnosis alone.

Safety and escalation logic

Trigger findings that should send the clinician back to intervention-first logic, including worsening work, rising CO2 concern, silent chest, asymmetry, severe hypoxemia, or mental-status change.

Source grounding / framework basis

The internal and external references used to ground the framework.

Domain map / high-level respiratory architecture

Identifies the major respiratory domains clinicians should interrogate: respiratory drive and control, ventilatory pump, airflow mechanics, gas exchange, pulmonary perfusion and V/Q, and systemic oxygen delivery and demand. Defines what failure in each domain looks like clinically.

Foundational physiology

Normal mechanics of breathing, work of breathing, ventilation and CO2 clearance, oxygenation, V/Q matching, shunt and dead space, PaCO2–EtCO2 mismatch, A–a gradient concepts, FiO2–PaO2 relationships, and intrinsic versus extrinsic causes of dyspnea.

Respiratory control physiology

Brainstem rhythm generation, central chemoreceptors, peripheral chemoreceptors, other pattern-modifying inputs, differences between hypoxemia, tissue hypoxia, hypercapnia, and metabolic acidosis, and how to interpret increased respiratory rate and effort clinically.

Clinician-facing state classification

Observable respiratory states such as eupnea, tachypnea, bradypnea, rapid shallow breathing, prolonged expiratory pattern, Kussmaul breathing, abnormal rhythmic states, work-of-breathing states, air-movement and auscultatory states, and adequacy and failure states. Also explains how those states map to severity.

Mechanism taxonomy

Organized mechanism layers producing respiratory states, including respiratory drive failure, ventilatory pump failure, airflow-mechanics failure, parenchymal and alveolar gas-exchange failure, pulmonary perfusion and V/Q failure, systemic oxygen-delivery and metabolic mechanisms, and mechanism explanations for common auscultatory states. Includes progression logic examples.

Bedside synthesis / state-to-mechanism reasoning

Practical sequence for moving from observed bedside state to the primary domains that should be interrogated next.

Conceptual summary

Distills the core thesis that respiratory signs are clinician-facing states that must be traced back to physiologic failure mode rather than treated as diagnoses themselves.

Treatment philosophy / framework logic

Explains that treatment is organized by failing physiologic domain rather than diagnosis, with the first treatment priority determined by the first failing domain. Clarifies oxygenation versus ventilation, FiO2 versus PEEP, and response to therapy as diagnostic data.

Decision framework / treatment sequence

Maps failing domains to treatment goals, intervention classes, and reassessment endpoints, including adequacy gate, control, mechanics, ventilation, oxygenation and V/Q, and continuous reassessment.

Domain-by-domain treatment logic

Targeted priorities for disordered control of breathing, mechanical disruption of breathing, ventilation and CO2 clearance, and oxygenation and recruitment and V/Q and perfusion-linked failure.

Medication framework

Organized respiratory pharmacology by problem type, including SABAs, antimuscarinics, corticosteroids, magnesium, methylxanthines, mucoactive agents, inhaled pulmonary vasodilators, and fibrinolytics for pulmonary embolism reperfusion. Includes mechanism, targeted problem, major cautions, pearls and pitfalls, and reassessment logic.

Support-mode framework

Conventional oxygen, HFNC, CPAP, and bilevel NIV organized by their primary physiologic job, best-fit use case, pitfalls, settings logic, and signs of success or failure.

Ventilator management framework

Core settings, physiologic job of each ventilator variable, volume versus pressure control, obstructive ventilation strategy, restrictive and ARDS-like ventilation strategy, and key monitoring priorities.

Advanced mode / rescue-logic section

What APRV is, where it fits, how its settings work, benefits and harms, and when oxygenation priorities appropriately outweigh immediate CO2 normalization.

Response monitoring / escalation framework

How to judge whether the target domain improved, whether another domain worsened, and when the case should return to earlier assessment and escalation steps.

Quick-reference mapping tool

Direct mapping of failing domain and mechanism to intervention classes, common mistakes, and reassessment endpoints.

Source grounding

Internal and external guideline and text references used to support the treatment framework.