Early diagnosis of Gitelman syndrome in a young child: A case report

Table 1 Summary of laboratory values

	ED	Admission	OPD	Unit (normal range)
Blood
Cr	0.18		0.12	mg/dL	0.5-0.9
Na	136	138	131	mmol/L	136-146
K	1.9	3.1	2.9	mmol/L	3.5-5.1
Ca	9.1	9.7		mg/dL	8.6-10.3
Cl	94		91	mmol/L	101-109
Mg	1.9		1.9	mg/dL	1.9-2.7
Osmolarity			271	mOsmol/Kg	280-305
TSH		4.0		μIU/mL	0.27-4.2
Free T4		1.94		ng/dL	0.8-2.0
ACTH			12.65	pg/mL	10-60
Cortisol (8AM)			8.77	μg/dL	5-25
Aldosterone			6.1	ng/dL	0.75-15
Renin			168.0	pg/mL
VBG
pH	7.558	7.442	7.545		7.31-7.41
PCO2	31.2	41.4	28.3	mmHg	41-57
HCO3-	27.2	27.6	23.9	mmol/L	23-30
Spot urine
Na		74	81	mmol/L
K		23	39	mmol/L	25-120
Cl			64	mmol/L	110-250
Cr			28.17	mg/dL
Osmolarity			412	mOsmol/Kg	200-1200
K/Cr ratio			15.6	mmol/mmol
TTKG			8.9
24 Hrs Urine
Total Volume			210	ml
Na (Sodium) urine			95	mmol/L
K(Potassium) urine			34	mmol/L	25-120
Cl (Chloride) Urine			442	mmol/L	110-250
Ca (Calcium) Urine			0.4	mg/dL	6.8-21.3
Ca/Cr ratio			0.01

We can see the changes of laboratory values of the index patient from emergency department, admission, and at out-patient follow-up. ED: Emergency department; OPD: Ordinary patient department; Cr: Creatinine; TSH: Thyroid stimulating hormone; ACTH: Adrenocorticotropic hormone; VBG: Venous blood gas; TTKG: Trans-tubular potassium gradient.