SBD V/Q

Satish Deopujari

About this app

V/Q mismatch is at the heart of respiratory support. SBD V/Q is an interactive teaching cartoon of
ventilation–perfusion mismatch — how air (V) must meet blood (Q) in the lung.
See three units side by side:
Matched — blue blood turns red
Shunt — blood with no air; stays blue
Dead space — air with no blood
Drag A–a and FiO2. Restore room air. Watch PaO2 in blood versus PAO2 in the alveolus, Mix
SaO2, and why raising oxygen helps low V/Q but shrugs at true shunt.
Tabs
Play — three units, gases, chips (Normal, Atelectasis, Embolus, Mixed)
Shunt — Qs/Qt, the 100% oxygen test, unused air
TYPE 1&2 — hypoxaemic versus hypercapnic failure
Res — the papers this cartoon stands on

Book and Math — the written walk and the teaching equations
For students, residents, and teachers of physiology and intensive care. Simulated units only.
This is not a medical device. Do not use V/Q to diagnose, treat, monitor, or decide ventilation for a
real patient. Educational use only. Not for clinical use.
SBD teaching · v1.26