Table 1.

Levels of potassium and magnesium in plasma and breast milk in a patient with Gitelman syndrome

	Pl-K⁺	Milk K⁺	Dosage K⁺	Pl-Mg²⁺	Milk Mg²⁺	Dosage Mg²⁺
GA
34 + 2	3.8		150	0.58		1.0
36 + 2	4.3		150	0.62		4.5
37 + 2	4.0		200	0.60		7.5
38 + 2	3.9		200	0.60		15.0
38 + 6	4.4		225	0.65		24.0
Postpartum
Day 7	3.6	16.1	350	0.65	1.58	15.0
Day 11	3.4		350	0.72		15.0
Day 14	3.2		350	0.69		15.0
Day 18	4.4	15.3	350	0.74	1.53	15.0
Day 21	3.4	14.7	350	0.76	1.06	15.0
Day 28	3.2		350	0.63	0.95	15.0
Day 36	4.1	12.8	350	0.70	1.11	15.0
Day 49	3.9	15.5	300	0.71	1.42	10.0
Day 82	3.4		200	0.71		2.5
Day 123	3.4		200	0.68		0

GA, gestational age; K⁺, potassium ion; Mg²⁺, magnesium ion; Pl, plasma.

Plasma and milk levels are expressed as mmol/l. Dosages of supplementation of potassium chloride and magnesium gluconate in mmol/d.