Introduction to Serum Creatinine Test (Nursing)

by Prof. Lawes

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    00:00 Hi! Welcome to our series on interpreting lab values.

    00:04 In this one we're going to give you an introduction to serum creatinine.

    00:08 Now if you're going to do a serum creatinine blood test this requires a venous blood sample, you're going to use a gel barrier tube.

    00:15 It be a red top tube, a green top tube, that's Heparin or a lavender top tube.

    00:22 Creatinine levels are different for men and for women.

    00:26 So a normal level for a man is going to be 0.6 to 1.2.

    00:31 Women is 0.5 to 1.1.

    00:34 Now don't let this throw you off.

    00:36 Let's keep in mind that creatinine is attached to muscles. Right? It's part of the muscle metabolism, men tend to have higher percentages of body muscle than women do.

    00:47 So just memorize one of those values and keep in mind women are just a notch lower in their normal creatinine levels.

    00:55 Alright, so we know what tube you draw it in, we know differences for men and for women just the tiniest bit of difference.

    01:03 Now let's look at what serum creatinine is see, it's one of the chemical waste products and it's produced by muscle metabolism.

    01:11 That's why the male number is a little bit higher because they generally have higher muscular percentages.

    01:17 So it's muscle metabolism to waste product and there's a smaller extent due to eating meat but predominantly creatinine is related to your muscle metabolism.

    01:29 Now creatinine is a waste product of creatine the muscles use that to make energy so that all ties together when you think about creatinine I want you to think about muscle metabolism and that males are going to be a little bit higher normal numbers than females.

    01:46 Now normally healthy kidneys filter creatinine that waste product and other waste products from your blood into your urine.

    01:54 So if I have good strong healthy functioning kidneys, I should have a normal serum creatinine level.

    02:02 So that's another key takeaway piece about serum creatinine it assesses renal or kidney function.

    02:09 If your kidneys impaired, you're going to have an elevated level of creatinine in your blood.

    02:14 So make sure you've got that underline in your notes.

    02:17 If I have impaired kidneys watch for elevated serum creatinine.

    02:22 Now serum creatinine can also help give an estimate of how well the kidneys are able to filter right down to that specific level.

    02:30 GFR is glomerular filtration rate, and a serum c reatinine can help us assess that.

    About the Lecture

    The lecture Introduction to Serum Creatinine Test (Nursing) by Prof. Lawes is from the course Serum Creatinine – Renal Assessment (Nursing).

    Included Quiz Questions

    1. A chemical waste product of muscle metabolism
    2. It is a waste product of amino acids
    3. It is a hormone produced by the pancreas
    4. It helps estimate the client's glomerular filtration rate
    5. It provides information about kidney function

    Author of lecture Introduction to Serum Creatinine Test (Nursing)

     Prof. Lawes

    Prof. Lawes

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