Simini Boards Cast
The Simini Boards-Cast is the go-to audio study tool for small animal surgery residents prepping for board exams.
Each episode simplifies high-yield surgical content from trusted sources — built to help you pass faster and with less stress.
🎧 Audio-based learning for passive study
✂️ Practical relevance for surgical application
🧠 Flashcard-style recaps + board-style questions
📈 Designed with resident + program director input
Whether you're commuting, walking the dog, or post-op, turn that time into surgical mastery.
Subscribe now and get board-ready — fast.
Simini Boards Cast
Chapter 103 - Part D: Oxygen Doesn’t Deliver Itself
Use Left/Right to seek, Home/End to jump to start or end. Hold shift to jump forward or backward.
In this BoardsCast episode, we continue Tobias Chapter 103 — Lungs with the trap that kills patients while the monitor looks “fine”:
Perfect lungs. perfect PaO₂. perfect SpO₂…and the tissues are still suffocating.
Because oxygen entering the blood doesn’t matter if it isn’t being carried and moved.
This episode installs the single governing framework for oxygen delivery:
DO₂ = Cardiac Output × CaO₂
And then we break down the part most people misunderstand: CaO₂ is almost entirely hemoglobin, not dissolved oxygen. PaO₂ is a “warehouse” number — but hemoglobin is the truck fleet, and cardiac output is the highway.
You’ll learn:
- Why no hemoglobin = no delivery (period)
- CaO₂ math in plain terms: ~98% carried on hemoglobin, ~1–2% dissolved (PaO₂ barely moves the needle)
- Why does doubling PaO₂ barely increase total oxygen content (you doubled the “rounding error”)
- 4 classic delivery failures the boards love:
- Severe anemia (missing trucks)
- Carbon monoxide poisoning (trucks hijacked + won’t unload; pulse ox can lie)
- Shock/low CO (highway jam)
- Left shift (doors won’t open: alkalosis/hypothermia/low CO₂)
- The bedside pivot: if PaO₂ is normal but the patient is hypoxic, stop chasing lungs and start chasing Hb and flow
Key takeaway: oxygen doesn’t move itself — hemoglobin moves it, and the heart delivers it.
🎁 Simini Bonus
Claim your free sample of Simini Protect Lavage (just cover shipping):
https://www.simini.com/evaluation-kit
Listen On: Spotify | Apple Podcasts | Amazon Music