Table 1. Laboratory values .

BUN: blood urea nitrogen; eGFR: estimated glomerular filtration rate; PO2: partial pressure of oxygen; PCO2: partial pressure of carbon dioxide

Normal lab values	Rehab facility	First hospitalization	Second hospitalization
Potassium 3.3-5.1 mmol	4.3	4.5	5.7
Bicarbonate 20-32 mmol/L	22	20	2
BUN 7-22 mg/dL	32	34	51
Creatinine 0.6-1.4 mg/dL	2.61	2.79	4.12
eGFR >59 ml/min	43	40	18
Anion gap 4-16	12	13	21
Lactic acid 0.5-1.6 mm/L	-	2.3	15
HbA1C 4-6%	-	-	5.9
pH 7.35-7.45	-	-	6.5
PO2 80-100 mmHg	-	-	55
PCO2 35-45 mmHg	-	-	47