Renal Losses: Magnesium Deficit – Hypokalemia

by Amy Sussman, MD

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    00:01 Now finally, we come to magnesium which gets its own little category.

    00:05 So magnesium can cause hypokalemia and about 40 to 60 percent of cases.

    00:09 And it's often due to underlying disorders that waste both magnesium and potassium.

    00:13 These are things like diarrhea or using diuretics.

    00:17 The renal potassium wasting however does occur independently because of an increase in secretion into the loop of henle and collecting duct.

    00:24 Now, the mechanism has to why this happen isn't completely understood but probably has to do with ATP depletion.

    00:30 And and the removal of the inhibitory action on that reno outer medullary potassium channel.

    00:35 One thing that I do want you to keep in mind is that you absolutely have to correct magnesium deficits in order to restore potassium.

    00:44 So you could never get somebody's potassium repeated if you remain hypomagnesemic, so do keep that in mind as you are taking care of these patients.

    About the Lecture

    The lecture Renal Losses: Magnesium Deficit – Hypokalemia by Amy Sussman, MD is from the course Potassium Disorders: Hypo- and Hyperkalemia.

    Included Quiz Questions

    1. Parathyroid hormone level
    2. Urinary potassium excretion
    3. Acid-base status
    4. Serum magnesium level
    5. Volume status

    Author of lecture Renal Losses: Magnesium Deficit – Hypokalemia

     Amy Sussman, MD

    Amy Sussman, MD

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    Fantastic lecture
    By b. a. on 28. June 2020 for Renal Losses: Magnesium Deficit – Hypokalemia

    Fantastic lecture Dr. Amy presents the material in a clear and logical sequence