Struggling to Breathe? Here’s What I Do First — A Doctor’s Step-by-Step Guide to Hypoxia

By Natasha Kumar, MD — Internal Medicine Resident & Medical Writer

🫁 You’re on call. You get the dreaded page: “Patient satting 82% on room air.”

If your heart just jumped — welcome to the club.

I still remember the first time it happened to me. I froze. I didn’t know what I’d find, what to do first, or how to look calm while absolutely spiraling inside.

So, I made a system. A ladder. A go-to protocol I could follow under pressure. And today I’m going to share it with you.

Step 1: Get to the Bedside

Don’t ask for vitals over the phone. Don’t scroll the chart. Just go. You need eyes on the patient. Is this real? Are they breathing? Talking? Panicking?

Step 2: Confirm It’s Real

• Feel their hands (cold hands = bad waveform)
• Recheck the pulse ox
• Look at the respiratory rate yourself — don’t trust auto-captured vitals

Step 3: The Oxygen Ladder

Let’s talk about what to actually put on their face and when.

Oxygen Ladder

❗ BiPAP is dangerous in altered patients. They can’t protect their airway. Call for help.

Step 4: Find the Cause Fast

Use the 60-second rule:

• Look: Cyanosis? Tripoding? Diaphoresis?
• Listen: Crackles (CHF)? Wheezing (asthma/COPD)? Silent chest (bad sign)
• Feel: JVD? Pedal edema?

And always ask:

• Fever? → Think pneumonia
• Volume overload? → CHF
• New A-fib, CP, leg swelling? → PE

Step 5: Act Before You Think Too Long

• CHF? Give Lasix (start with 20 mg IV; 40 mg if they’ve had it before)
• Pneumonia? Stable → Ceftriaxone + Azithro. Unstable → Zosyn + Vanc
• Asthma/COPD? Duonebs + steroids
• No clue? Stabilize and call your senior

Step 6: Reassess Every 15–30 Minutes

Hypoxia doesn’t wait. If you’re seeing no improvement → escalate. Don’t hesitate to call RRT.

If you’re a new intern or just want to stay calm when the pager goes off, this is the cheat code I wish I had Day 1.

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