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Table 1 Our Patient’s Lab Values

From: “Summer hypokalemia” as an initial presentation of cystic fibrosis in a morbidly obese African American adult: case report

Year

Setting

Aug 2015

1st Hospital

Apr 2016

Office

Jul 2016

ER

Jul 2017

2nd Hospital

Jul 2018

3rd Hospital

Na (mEq/L)

134

142

136

136

134

K (mEq/L)

1.5

4.3

2.5

2.3

2.7

Cl (mEq/L)

78

101

88

89

91

HCO3 (mEq/L)

42

26

37

38

36

BUN (mg/dL)

15

11

16

17

15

Cr (mg/dL)

1.39

0.75

1.1

1.0

1.1

Urine Na (mEq/L)

<  10

  

45

26 (FeNa 0.09%)

Urine Cl (mEq/L)

a

  

<  15

 

Urine K mEq/L

13.8 b

  

19

33

Urine Cr mg/dL

215

   

237

Urine K/Cr mEq/g c

6.4

   

13.9

Urine pH

5.5

  

5.0

5.0

Plasma renin (ng/ml//hr) d

28.2 (H)

  

12.6 (H)

 

Plasma aldosterone (ng/dL) e

6 (N)

  

<  1 (L)

 
  1. a Urine Cl was ordered twice but not done; b K 16.6 mEq/24 h on same specimen (< 30 mEq/24 h indicates extrarenal loss of potassium); c Urine K/Cr < 22 mEq/g indicates extrarenal loss of potassium; d Renin normal range 0.25–5.82 ng/ml//hr.; e Aldosterone normal range 3–16 ng/dL, supine