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Table 1 Serum and urine biochemistry at admission

From: An atypical presentation of high potassium renal secretion rate in a patient with thyrotoxic periodic paralysis: a case report

Parameter (reference range)

Value

Plasma

 pH (7.35–7.45)

7.37

 Bicarbonate (22–26 mmol/L)

24.9

 BUN (7–25 mg/dl)

13

 Creatinine (0.5–1.3 mg/dl)

0.75

 Na+ (133–145 mmol/L)

139

 K+ (3.3–5.1 mmol/L)

2.2a

 Cl (96–108 mmol/L)

106

 Ca++ (3.68–5.6 mg/dl)

4.47

 Phosphate (2.5–5 mg/dl)

4.9

 Magnesium (1.9–2.7 mmol/L)

1.8a

 Osmolality (278–305 mOsm/kg)

302

 TSH (0.35–4.94 uIU/ml)

< 0.0025a

 T4, Free (0.7–1.48 ng/dl)

1.8a

 T3 (0.58–1.59 ng/ml)

1.4

 Anti – TPO (0–5.61 IU/ml)

< 1.0

 TSH receptor antibody

18.4%a

Spot urine

 

 pH (5–8)

6.5

 Creatinine (mg/dl)

230

 Na+ (mmol/L)

230

 K+ (mmol/L)

48

 Cl (mmol/L)

243

 Osmolality (300–900 mOsm/kg)

938

 TTKG (< 3)b

7.02

 K+/Cr (mmol/mmol) (< 2)b

2.36

 FeK (< 3%)b

7.12

  1. a Indicates abnormal values; b indicates reference range for normal renal response to hypokalemia. Abbreviation: BUN, blood urea nitrogen; TSH, thyroid stimulating hormone; TPO, thyroid peroxidase; TTKG, transtubular potassium gradient; FeK, fractional excretion of potassium