Ventilator Weaning Score Medical Algorithm

Description

Morganroth et al developed weaning criteria for patients who have received prolonged mechanical ventilation. Calculating a ventilator score for the patient was one step in the process of patient evaluation. The authors are from the University of Colorado Medical Center in Denver.

Parameters:

(1) fraction of inspired oxygen in percent

(2) positive end-expiratory pressure in cm H2O

(3) static compliance in mL per cm H2O

(4) dynamic compliance in mL per cm H2O

(5) delivered ventilator minute ventilation in L/min

(6) triggered respiratory rate in breaths per minute

Parameter	Finding	Points
fraction of inspired oxygen	<= 40%	0
	41- 50%	1
	51 – 60%	2
	>= 61%	4
positive end-expiratory pressure	0 cm H2O	0
	1 – 5 cm H2O	2
	6 – 10 cm H2O	4
	11 – 15 cm H2O	5
	> 15 cm H2O	10
static compliance	>= 60 mL per cm H2O	0
	50 - 59 mL per cm H2O	1
	40 - 49 mL per cm H2O	2
	30 - 39 mL per cm H2O	3
	< 30 mL per cm H2O	4
dynamic compliance	>=40 mL per cm H2O	0
	30 - 39 mL per cm H2O	1
	21 - 29 mL per cm H2O	2
	<= 20 mL per cm H2O	3
delivered ventilator minute ventilation	<= 10 L/min	0
	10.1 - 15 L/min	1
	15.1 - 20 L/min	2
	20.1 - 25 L/min	3
	25.1 - 30 L/min	4
	> 30 L/min	5
triggered respiratory rate	<= 20 breaths per minute	0
	> 20 breaths per minute	1

ventilator score =

= SUM(points for all 6 parameters)

Interpretation:

• minimum score: 0

• maximum score: 27

• The higher the score, the less likely that the patient will be able to be weaned.

Combination with adverse factor score:

• A sum of the (ventilator score) + (adverse factor score) <= 55 indicates a good chance of successful weaning, while a score > 55 is associated with a poor chance.

• The sensitivity of the combined score for predicting successful weaning was 93% with a specificity of 86%.

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Description

Specialty

Objective

ICD-10

Ventilator Score of Morganroth et al

Purpose: To evaluate a person being mechanically ventilated using the ventilator score of Morganroth et al.

Description

Specialty

Objective

ICD-10