Risk Score of Oz et al for Survival After Placement of a Mechanical Left Ventricular Assistance Device

Description

Oz et al developed a risk score for evaluating the mortality risk for patients requiring a mechanical left ventricular assistance device. This can help identify patients who are likely to benefit from the device. The authors are from Columbia-Presbyterian Medical Center in New York City.

Parameters:

(1) urine output

(2) central venous pressure

(3) mechanical ventilation

(4) prothrombin time (PT)

(5) reoperation

Parameter	Finding	Points
urine output	>= 30 mL per hour	0
	< 30 mL per hour	3
central venous pressure	<= 20 mm Hg	0
	> 20 mm Hg	2
mechanical ventilation	no	0
	yes	2
prothrombin time	<= 16 seconds	0
	> 16 seconds	2
reoperation	no	0
	yes	1

where:

• The parameters reflect organ failures - oliguria for renal failure, prolonged PT in hepatic failure, etc.

• The reference range for the PT was not given.

total score =

= SUM(points for all 5 parameters)

Interpretation:

• minimum score: 0

• maximum score: 10

• The higher the score the worse the survival.

• A score > 5 is associated with mortality. Most patients who survive score < 5 points.

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Description

Specialty

ICD-10