Separate resistance from compliance

Measure plateau pressure during a valid inspiratory hold, then choose the branch.

Peak pressurePressure required to deliver flow through the circuit, tube, airways, and respiratory system.Plateau pressureStatic pressure measured when inspiratory flow is zero.High resistance branchPIP rises while Pplat is near baseline or much less elevated.Low compliance branchPIP and Pplat both rise.Overdistension branchHigh plateau/driving pressure or beaking on the P-V loop.

Evidence and use limits

Last reviewed: 2026-07-23. Designed for: emergency medicine learners, clinicians, EMS, RT, and airway educators.

This is an educational cognitive aid, not a bedside order set. Confirm medications, ventilator changes, pediatric dosing, procedures, and escalation decisions against the patient’s physiology, the ventilator in use, and local ED/ICU/anesthesia/pharmacy/RT/EMS/pediatric policy.

Full references · Editorial policy · AARC 2024 ventilator assessment · ATS/ESICM/SCCM lung-protective ventilation · ATS 2024 ARDS update

About this resource

Created by: Andrew Pirotte, MD; Kyle Brown, MD; Reba Hodge, MD; Amanda Vanderwerf, PharmD, BCEMP; Morgan Kimball, PharmD, BCEMP; Joshua Mohess Clinical review: Clinical review pending: local ED, ICU, EMS, anesthesia, pharmacy, and pediatric protocol review recommended before bedside teaching rollout. Last reviewed: 2026-07-23 Next scheduled review: 2027-01-23 Designed for: EM residents, emergency physicians, EMS clinicians, airway educators, and simulation faculty Important: Educational resource and cognitive-aid guide only; not a bedside order set or substitute for local protocol, medical direction, or clinical judgment. Website contact: kybrown@kumc.edu