Table 1

Red cell indices, osmotic gradient ektacytometry variables, intracellular [Na⁺] and [K⁺] and isotopic K⁺ influx

	Haematological indices					Osmotic gradient ektacytometry			Intracellular electrolytes (mmol/l cells)		K⁺ (86Rb) influx at 5 mM external [K⁺] (mmol/(l cells.h))
	Hb (g/l)	MCV (fl)	MCHC (g/l)	Retics (%)	Stmtcyts	O_min (mosmol/kg)	DI_max (arbitrary units)	O’ (mosmol/kg)	Na⁺	K⁺	Pump	Cotr	Leak
Hb, Haemoglobin; MCV, mean corpuscular volume; MCHC, mean corpuscular haemoglobin concentration; Retics, reticulocytes; Stmtcyts, stomatocytes; O_min, osmotic fragility; DI, deformability index; O’, measure of cellular hydration; Cotr, Na⁺/K⁺ cotransport.
Child	112	87.4	372	5.5	+	125	0.46	312	18.4	88.7
Mother	99	103.6	363	2.7	+	147	0.47	333	11.48	102.2	3.539	0.252	0.140
Father	158	88.9	355	1.7	−	161	0.41	346	8.93	99.1
Normal	120–180	85–96	300–350	<2		143–163	0.41–0.53	335–375	5–11	85–105	1–2	0–1	0.05–0.10