Hypomagnesemia: Difference between revisions

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==Background==
==Background==
*HypoK, hypoCa and hypophos are often also present
*[[HypoK]], [[HypoCa]] and [[Hypophos]] are often also present
==Diagnosis==
==Diagnosis==
CNS
*CNS
*Muscle weakness
**Muscle weakness
*Ataxia
**[[Ataxia]]
*Confusion
**[[Confusion]]
*Seizures
**[[Seizures]]
*Coma
**Coma
GI
*GI
*Dysphagia
**Dysphagia
CVCardiovascular
*Cardiovascular
*CHF
**[[CHF]]
*Dysrhythmias
**[[Dysrhythmias]]
*Hypotension
**Hypotension
Miscellaneous
*Miscellaneous
*Hypokalemia
**[[Hypokalemia]]
*Hypocalcemia
**[[Hypocalcemia]]
*Anemia
**[[Anemia]]
 


==DDX==
==DDX==
#ETOH
#[[ETOH]]
#Malnutrition
#Malnutrition
#Cirrhosis
#Cirrhosis
#Pancreatitis
#[[Pancreatitis]]
#S/P DKA
#S/P [[DKA]]
#GI loss (esp diarrhea)
#GI loss (esp diarrhea)
#Renal wasting
#Renal wasting
##Furosemide
##Furosemide
##Hypophosphatemia
##[[Hypophosphatemia]]


==Treatment==
==Treatment==
*Replete [[Magnesium]] 2gm IV over 2hrs
*Replete [[Magnesium]] 2gm IV over 2hrs
**up to 8-12gm may be given on 1st day
**up to 8-12gm may be given on 1st day
*Replete if serum level <1.7
*Usual dose is 2g over 1 hour
*If level <than 1.2, double the dose
*Oral repletion may done if level is >1.2 and pt is asymptomatic
*Magnesium oxide 400mg is approximately equal to 2g of MgSO4


==See Also==
==See Also==
*[[Magnesium]]
*[[Electrolyte Abnormalities (Main)]]
*[[Hypermagnesemia]]


==Source ==
==Source ==

Revision as of 07:21, 18 December 2013

Background

Diagnosis

DDX

  1. ETOH
  2. Malnutrition
  3. Cirrhosis
  4. Pancreatitis
  5. S/P DKA
  6. GI loss (esp diarrhea)
  7. Renal wasting
    1. Furosemide
    2. Hypophosphatemia

Treatment

  • Replete Magnesium 2gm IV over 2hrs
    • up to 8-12gm may be given on 1st day


  • Replete if serum level <1.7
  • Usual dose is 2g over 1 hour
  • If level <than 1.2, double the dose
  • Oral repletion may done if level is >1.2 and pt is asymptomatic
  • Magnesium oxide 400mg is approximately equal to 2g of MgSO4


See Also

Source

Tintinalli