Table 2.
Blood sodium, potassium, chloride and ionized calcium, and serum phosphorus concentrations (mean ± SD [range]) of cats with chronic kidney disease (CKD) with nephrolithiasis and magnesium abnormalities
| CKD cats with nephrolithiasis | Sodium concentrations (mEq/l) | Potassium concentrations (mEq/l) |
Chloride concentrations (mEq/l) |
Phosphorus concentrations (mg/dl) |
Ionized calcium concentrations (mmol/l) |
|---|---|---|---|---|---|
| Low total serum magnesium concentrations (n = 6) a | 154 ± 4.15 (148.6–161.4) |
3.95 ± 0.45 (3.22–4.55) |
119.5 ± 5.66 (113.3–129.9) |
5.65 ± 3.10 (3.78–11.90) |
1.45 ± 0.09
b
(1.38–1.64) |
| High total serum magnesium concentrations (n = 16) b | 152.7 ± 6.21 (142.8–167) |
4.06 ± 0.70 (3.14–5.98) |
117.5 ± 6.01 (104.6–127) |
10.37 ± 6.25
c
(3.23–24.80) |
1.28 ± 0.16a,c (0.86–1.45) |
| Normal total serum magnesium concentrations (n = 20) c | 153.5 ± 2.23 (148.9–158) |
3.61 ± 0.69 (2.25–5.11) |
118.8 ± 2.25 (113.8–123) |
5.06 ± 1.48
b
(2.69–7.82) |
1.42 ± 0.15
b
(1.19–1.85) |
Reference intervals (Veterinary Teaching Hospital of the University of Sao Paulo): total serum magnesium 1.58–2.16 mg/dl; sodium 147–156 mEq/l; potassium 3.5–5.5 mEq/l; chloride 111–123 mEq/l; phosphorus 2.7–5.0 (mg/dl); ionized calcium 1.1–1.4 (mmol/l)
a,b
P <0.01
c,b
P = 0.03