Increased body fluid loss following surgery, drainage or environmental factors can impact fluid and electrolyte balance.
loss for electrolyte in mmol/L =
= (volume of fluid loss in liters) * (concentration of electrolyte in mmol/L)
where:
• For bicarbonate, chloride, potassium and sodium, mEq/L = mmol/L
For the most accurate determinations, the fluid volume and composition should be accurately measured. 4 different tables of electrolyte composition were reviewed for the table below and all gave different values.
Fluid |
Electrolyte |
Range in mmol/L |
bile |
bicarbonate |
35 |
|
chloride |
89 - 180 |
|
potassium |
3 - 12 |
|
sodium |
131 - 164 |
CSF |
bicarbonate |
25 |
|
chloride |
122 - 128 |
|
potassium |
2.5 – 4.5 |
|
sodium |
130 - 150 |
diarrheal stool |
bicarbonate |
30 - 50 |
|
chloride |
30 - 120 |
|
potassium |
10 - 40 |
|
sodium |
20 - 160 |
duodenum |
bicarbonate |
4 - 21 |
|
chloride |
104 |
|
potassium |
5 |
|
sodium |
140 |
gastric juice, with parietal cell secretion (acidic) |
bicarbonate |
0 |
|
chloride |
8 - 160 |
|
potassium |
5 - 15 |
|
sodium |
20 - 70 |
gastric juice, without parietal cell secretion (neutral to weakly alkaline) |
bicarbonate |
25 - 40 |
|
chloride |
80 - 120 |
|
potassium |
5 - 15 |
|
sodium |
70 - 150 |
ileum |
bicarbonate |
30 |
|
chloride |
43 - 137 |
|
potassium |
2 - 8 |
|
sodium |
80 - 150 |
pancreatic fluid |
bicarbonate |
66 - 127 |
|
chloride |
54 - 95 |
|
potassium |
3 - 7 |
|
sodium |
113 - 185 |
saliva |
bicarbonate |
2 - 13 |
|
chloride |
10 - 40 |
|
potassium |
15 - 40 |
|
sodium |
10 - 25 |
sweat |
bicarbonate |
0 |
|
chloride |
5 - 70 |
|
potassium |
5 - 15 |
|
sodium |
5 - 80 |
transudates |
bicarbonate |
24 - 29 |
|
chloride |
90 - 110 |
|
potassium |
2.5 - 5 |
|
sodium |
130 - 145 |
Specialty: Endocrinology, Clinical Laboratory, Emergency Medicine, Critical Care