Description

Thiel et al used recursive partitioning and regression tree (RPART) analysis to identify hospitalized patients at risk for septic shock. One analysis included results from an arterial blood gas analysis. The authors are from Washington University and Barnes-Jewish Hospital in St Louis.


 

Patient selection: hospitalized patient not in ICU with arterial blood gas results

 

Parameters:

(1) PaO2

(2) absolute neutrophil count

(3) serum BUN

(4) systolic blood pressure

(5) serum chloride

(6) arterial pH

(7) serum bicarbonate

(8) serum albumin

 

Findings associated with septic shock:

(1) PaO2 >= 178 mm Hg, absolute neutrophil count < 39,000 per µL

(2) PaO2 >= 178 mm Hg, absolute neutrophil count >= 39,000 per µL, BUN >= 16 mg/dL

(3) PaO2 < 178 mm Hg, systolic blood pressure < 78 mm Hg

(4) PaO2 < 178 mm Hg, systolic blood pressure 78 to 85 mm Hg, chloride < 91 mmol/L

(5) PaO2 < 178 mm Hg, systolic blood pressure >= 86 mm Hg, pH < 7.30, bicarbonate >= 17 mmol/L, albumin < 3.5 g/dL

 


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