Magnesium Sulfate Flashcards
What is Magnesium Sulfate used for in general?
Magnesium Sulfate is a CNS depressant. This means it relaxes smooth muscle, including in the uterus
What is the use of Magnesium Sulfate in the OB?
Mg Sulfate is used for assisting in pre-term labor, pregnancy induced HTN, and preeclampsia
What is Preeclampsia?
What is it characterized by?
Preeclampsia is a high blood pressure disease associated with pregnancy.
CHX: High blood pressure, swollen hands and feet, and - MOST IMPORTANTLY - Protein in the urine
What is the administration route for Mg Sulfate?
IV
What does a patient receiving Mg Sulfate through an IV get before their maintenance dose?
A loading dose for 20-30 minutes that is at a higher amount than maintenance.
Luckily, a lot of the negative Maternal side effects will go away after when?
After the loading dose is over.
The total IV intake of Mg Sulfate should never exceed what amount per hour?
125 mL/hr
What are some expected A/E’s of the Mg Sulfate loading dose?
-Heat Flashes
-Sweating
-Burns at the IV site
-Dry Mouth
-Blurred Vision
For Toxicity levels, what is the value that indicates hypermagnesemia in milliequivalents?
At or >10 mEq/L
What are some Fetal signs for too much Mg Sulfate?
Decreased FHR baseline
Decreased Fetal movement
What is the antidote to Magnesium Sulfate?
Calcium Gluconate
What should be monitored in a patient after administering MG Sulfate?
Monitor for the patients DTR (Deep Tendon Reflex)
What does an increased DTR in a patient signify?
What does a decreased DTR in a patient signify?
The values are inversed. Up is down, and down is up, so:
Increased DTR means too little Mg
Decreased DTR means too much Mg
What tool should be used for strict UOP monitoring?
A Foley Catheter
Which patients should NOT receive Mg Sulfate?
Women with Myasthenia Gravis (Autoimmune disorder or rapid fatigue of muscles), Hypocalcemia or renal failure
