Regulation of Serum Potassium Flashcards
1
Q
Roughly how much K+ is in the cell?
A
140 mmol/L
2
Q
What is the normal serum K+ ?
A
3.5-5.5 mmol/L
3
Q
What is an immediate treatment for hyperkalemia ?
A
Insulin (moves potassium into the cell)
4
Q
How does hyperkalemia show on a heart trace?
A
Tall T wave and QRS widens and flattens, long PR interval
5
Q
What can hypokalemia cause?
A
AF, muscle weakness, cramps and eventually cardiac arrest
6
Q
Which part of the nephron is most K+ reabsorbed?
A
PCT
7
Q
Which substance causes potassium secretion in to the lumen of the nephron?
A
Aldosterone
8
Q
What is the normal concentration of urine potassium?
A
60-80 mmol/L
9
Q
What is a long term treatment of hyperkalemia?
A
Low potassium diet, loop diuretic (furosemide)
