A 7-year-old boy with recurrent cyanosis and tachypnea: A case report

Table 1 Laboratory data

Variable	Reference range	On admission	4th hospital day
Complete blood count
White cell count, 109/L	3.6-9.7	10.5	NA
Neutrophils, %	23.6-75	71.2	NA
Lymphocytes, %	19-64	21.7	NA
Hemoglobin, g/L	110-146	137	NA
Platelet count, 109/L	100-450	187	NA
CRP, mg/L	0-8	10.9	NA
Blood gas analysis
pH	7.35-7.45	7.37	7.41
SaO2, %	90.0-98.0	89.6	97.7
PO2, kPa	10-14	7.6	11.3
PCO2, kPa	4.8-5.9	7.5	9.3
HCO3, mmol/L	21-28	32.4	44.4
BE, mmol/L	-3-3	5.4	15.3
Na+, mmol/L	135.0-145.0	133	132
K+, mmol/L	3.5-5.5	5.1	4.3
Ca2+, mmol/L	1.09-1.30	0.99	1.12
AG, mmol/L	10-18	8.0	3.0
Organ biochemical parameters
ALT, U/L	21-72	147	65
AST, U/L	17-59	134	44
LDH, U/L	313-618	1173	NA
Creatine, mmol/L	17.3-54.6	31	NA
Troponin I, mg/L	0-0.034	0.067	NA

AG: Anion gap; ALT: Alanine aminotransferase; AST: Aspartate transaminase; BE: Base excess; Ca²⁺: Calcium; CRP: C-reactive protein; HCO₃: Bicarbonate; K⁺: Sodium; LDH: Lactate dehydrogenase; NA: Not available; Na⁺: Sodium; PCO₂: Partial pressure of carbon dioxide; PO_2: Partial pressure of oxygen; SaO₂: Pulse oxygen saturation.