01
Recognize
What normal looks like for pulse, breathing, BP, and SpO2.
Lesson 4: Vital signs at home
The four numbers that change your next decision - and the tools to get them.
Module
04
The Real-Life First-Aid Kit
Vital signs at home
The four numbers that change your next decision - and the tools to get them.
Lesson 04 · Vitals
Learning Objectives
00 · 00
By the end of this lesson
Three things you'll be able to do.
02
Measure
All four vitals at home with the right tools.
03
Decide
What each abnormal reading should change about your response.
Lesson 04 · Vitals
Key Concept
00 · 00
Tool · pulse oximeter
Pulse oximeter
A fingertip clip that gives you two of the four vitals in under a minute. Reliable models cost $20–$50.
01
Normal SpO2: 95–100% · the number to remember.
02
90–94%: warning - call your doctor.
03
Below 90%: emergency - call 911.
04
Buy a name brand (Masimo, Innovo). No-name units misread on darker skin and cold fingers.
Fig. 04
Fingertip pulse oximeter · LED display
[ supporting visual ]
diagram · photo · screenshot
1600 × 900
aspect-fit
Lesson 04 · Vitals
Procedure
00 · 00
Procedure · taking all four vitals · 4 steps
A repeatable vitals routine
01
of 04
Sit
Seat the patient, arm at heart level
Calm setting if possible. Arm supported at the level of the heart. Wait 60 seconds before the first reading.
Checkpoint · Seated
02
of 04
Clip
Pulse oximeter on the finger
Slip the oximeter onto an index finger. Wait for the reading to stabilize - at least 15 seconds.
Checkpoint · SpO2 + pulse
03
of 04
Cuff
Take blood pressure twice
Auto cuff on the upper arm. Take a reading, wait 60 seconds, take a second reading. Average them.
Checkpoint · BP confirmed
04
of 04
Count
Watch the chest rise
Count breaths for 30 seconds and double - without telling the patient you're counting. They'll change their breathing if they know.
Checkpoint · Respiration
Lesson 04 · Vitals
Reflect
00 · 00
Reflect · 5 minutes
Before the next lesson
Which vital reading would change whether you call 911 versus drive to urgent care yourself?
Prompt 01
An SpO2 of 91% in a previously healthy adult?
Prompt 02
A blood pressure of 88/58 with chest pain?
Prompt 03
A breathing rate of 28 with a fever?
Lesson 04 · Vitals
Summary
00 · 00
Recap · 3 takeaways
Mapped to objectives 01–03
Vital signs recap
01
Vitals turn a guess ("they look bad") into a story ("SpO2 91, HR 110, BP 88/58").
Maps to · Objective 01
02
Pulse oximeter, BP cuff, thermometer - under $100 in kit and easy to use.
Maps to · Objective 02
03
Know your own baseline. Without it, abnormal readings have no meaning.
Maps to · Objective 03
Transcript
Lesson four: vital signs at home. Without numbers, you're guessing whether the patient is getting better or worse. With numbers, you have a story to tell the dispatcher.
Transcript
Three competencies. Recognize what normal looks like - for adults in general and for you specifically. Take all four vitals at home. And know what each number changes about your next decision.
Transcript
A pulse oximeter is a small clip that reads two numbers: oxygen saturation and pulse rate. Twenty to fifty dollars gets a reliable one. Skip the no-name brands; they read inaccurately on darker skin tones and in cold fingers.
Transcript
Taking vitals is a routine, not a guess. Run the same sequence every time so you don't forget one under stress. Four steps.
Transcript
Before you move on: a thought experiment. Imagine you've taken vitals on a family member who's complaining of chest tightness. What numbers would change what you do next, and how?
Transcript
Three things from this lesson. Vitals turn guesses into data. The right four tools cost about a hundred dollars total. And your own resting numbers are the baseline that makes everything else interpretable.