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Table 1 Laboratory investigations for COVID-19 patients with hyponatremia

From: Hyponatremia due to excessive water intake in COVID-19 patients: case series study

Investigation

Patient 1

Patient 2

Patient 3

Patient 4

Normal range

White blood cell count

7.8

10.2

11.1

8.5

4–10 × 10^3/uL

Hemoglobin

17.0

12.3

14.3

15.5

13–17 g/dL

Hematocrit

43.3

44.2

45.1

43.9

40–50%

Lymphocyte count

0.8

1.0

1.3

0.9

1–3 × 10^3/uL

Platelets

152

145

160

155

150–400 × 10^3/uL

Creatinine

65

60

55

61

62–106 umol/L

Alanine aminotransferase

79

50

35

55

0–41 U/L

C-reactive protein

52.8

30.5

25.6

51.3

0–5 mg/L

Procalcitonin

0.18

0.23

0.11

0.44

< 0.5 ng/mL

Lactic acid

2.3

0.3

0.6

1.9

0.5–2.2 mmol/L

PCR COVID-19

Positive

Positive

Positive

Positive

Not applicable

Serum sodium

129

130

131

128

136–145 mmol/L

Serum osmolality

225

220

219

235

275–295 mmol/kg

Urine sodium

36

25

30

32

25–40 mEq/L

Urine osmolality

85

91

101

88

150–1150 mmol/kg

TSH

0.85

1.5

0.99

1.8

0.3–4 mIU/L

Serum cortisol level (AM)

357

299

312

405

133–537 mmol/L