Acid-base Terminology (Nursing)

by Rhonda Lawes, PhD, RN

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      Slides Nursing Arterial Blood Gases.pdf
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      Review Sheet ABG Interpretation Nursing.pdf
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      Reference List Medical Surgical Nursing and Pathophysiology Nursing.pdf
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    00:00 Okay, so now we've kind of laid down the groundwork for that, you understand what pH is, you know what the normal pH is 7.35 to 7.45 We've looked at CO2 - it's controlled by the lungs, normal level 35 to 45 (mmHg) We've looked at bicarb which is, we're gonna say controlled by the kidneys, it's really the whole metabolic system.

    00:22 Normal levels are 22 to 26 (mmol/L).

    00:25 Now we're gonna start at the end.

    00:27 The end product of where your patient is 1 of 4 places, just like your favorite multiple choice test.

    00:34 Right we have respiratory acidosis or metabolic acidosis, you have respiratory alkalosis or metabolic alkalosis.

    00:44 Now just knowing those names, we can see all kinds of things about your patient.

    00:49 So let's look a t the names and see what's involved.

    00:52 Let’s look at respiratory acidosis.

    00:56 So, the name tells us whose fault it is because we're in respiratory acidosis, we know it's the lungs' fault.

    01:05 Acidosis tells you where we are.

    01:07 Again, look at that couch again.

    01:09 If we're saying that their pH is acidotic, that means that it's not between 7.35 and 7.45, it's somewhere beyond off that couch, so it's lower than 7.35 Now to help you remember this, you might want to write the values of the pH again in on your own notes over the couch of homeostasis.

    01:31 So the patient is in respiratory acidosis that means its the lung's fault that we got there and where we are is acidosis, so your pH is less than 7.35 Now for those of you that are already raising a hand, I want to give you question just to see if you understand.

    01:52 If it's the lung's fault that we're in acidosis, what do the lungs control? CO2 levels Okay, so would it take a higher CO2 level or a lower CO2 level to become more acidotic? Right, it would take a higher CO2 level.

    02:12 Well that would mean, are my lungs breathing way too fast? or not sufficiently enough? In order for CO2 to build up, that means my lungs are not hyperventilating, for some reason I'm not breathing effectively.

    02:27 Now it could be that (muffled) they're trying to strangle me or it could be that you've taken too many opiates and so you're breathing really is shallow or could be an asthma attack or maybe a COPD attack.

    02:41 Any one of these things that cause me to breathe inefficiently will cause CO2 to build up.

    02:48 The more CO2 that builds up, the more acidotic my pH will become That's why I showed you the couch and got you to move in that way.

    02:57 Okay now what about metabolic alkalosis? Well I know the first part the name tells me whose fault it is.

    03:05 So if it's metabolic, right that's the kidneys and the bicarb level.

    03:11 if I'm alkalosis, where are we on the couch? are our pH less than 7.35 or greater than 7.45? Good deal, it's greater than 7.45, we're in alkalosis.

    03:28 So metabolic alkalosis, that tells us the reason we're in alkalosis is the metabolic systems' fault.

    03:36 Okay, so normal values 7.35 to 7.45, 35 to 45 (mmHg) for CO2, 22 to 26 (mmol/L) for bicarb.

    03:47 I know you've heard those over and over and over again.

    03:52 That's because I want you to study as you go with us.

    03:55 In that way, you'll all know these by the end of the video

    About the Lecture

    The lecture Acid-base Terminology (Nursing) by Rhonda Lawes, PhD, RN is from the course Interpretation of Arterial Blood Gases (ABGs) (Nursing).

    Included Quiz Questions

    1. Less than 7.35
    2. Greater than 7.35
    3. Less than 7.45
    4. Greater than 7.45
    1. Greater than 7.45
    2. Less than 7.35
    3. Greater than 7.35
    4. Less than 7.45

    Author of lecture Acid-base Terminology (Nursing)

     Rhonda Lawes, PhD, RN

    Rhonda Lawes, PhD, RN

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    By Binhui L. on 13. August 2020 for Acid-base Terminology (Nursing)

    very engaging. Rhonda is able to make the concept much more clear and understandable