7489 Week 4, Day 1 Electrolyte Disorders Pre-Class (LEE)

Term
1 / 5
What is the equation for corrected Na⁺?
Click the card to flip 👆
Terms in this set (5)
Step One:
- correct hypovolemia first if any signs of low flow rate is present (e.g., low BP or urine output)

Step Two:
- calculate normal TBW
- TBW = 0.6 L/kg x weight in kg (children and males <70 yo)
- use 0.5 L/kg in men >70 and females <70 yo
- use 0.45 L/kg for women >70 yo
- use 0.4 L/kg for dehydrated, older patients

Step Three:
- calculate current TBW
- current TBW = normal TBW x (140/serum Na⁺)

Step Four:
- calculate water deficit
- water deficit (L) = normal TBW - current TBW

Step Five:
- determine replacement fluid and total volume of the replacement fluid

**max recommended sodium correction rate is 0.5 mEq/L/h